java/16 : java.xml/com/sun/org/apache/xpath/internal/objects/XString.java

XString
https://openjdk.java.net/
GPLv2 + Classpath Exception
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 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
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package com.sun.org.apache.xpath.internal.objects;

import java.util.Locale;

import com.sun.org.apache.xml.internal.dtm.DTM;
import com.sun.org.apache.xml.internal.utils.XMLCharacterRecognizer;
import com.sun.org.apache.xml.internal.utils.XMLString;
import com.sun.org.apache.xml.internal.utils.XMLStringFactory;
import com.sun.org.apache.xpath.internal.ExpressionOwner;
import com.sun.org.apache.xpath.internal.XPathContext;
import com.sun.org.apache.xpath.internal.XPathVisitor;

This class represents an XPath string object, and is capable of
converting the string to other types, such as a number.
@xsl.usage general/**
 * This class represents an XPath string object, and is capable of
 * converting the string to other types, such as a number.
 * @xsl.usage general
 */
public class XString extends XObject implements XMLString
{
    static final long serialVersionUID = 2020470518395094525L;

  Empty string XString object /** Empty string XString object */
  public static final XString EMPTYSTRING = new XString("");

  Construct a XString object.  This constructor exists for derived classes.
Params: val – String object this will wrap./**
   * Construct a XString object.  This constructor exists for derived classes.
   *
   * @param val String object this will wrap.
   */
  protected XString(Object val)
  {
    super(val);
  }

  Construct a XNodeSet object.
Params: val – String object this will wrap./**
   * Construct a XNodeSet object.
   *
   * @param val String object this will wrap.
   */
  public XString(String val)
  {
    super(val);
  }

  Tell that this is a CLASS_STRING.
Returns: type CLASS_STRING/**
   * Tell that this is a CLASS_STRING.
   *
   * @return type CLASS_STRING
   */
  public int getType()
  {
    return CLASS_STRING;
  }

  Given a request type, return the equivalent string.
For diagnostic purposes.
Returns: type string "#STRING"/**
   * Given a request type, return the equivalent string.
   * For diagnostic purposes.
   *
   * @return type string "#STRING"
   */
  public String getTypeString()
  {
    return "#STRING";
  }

  Tell if this object contains a java String object.
Returns: true if this XMLString can return a string without creating one./**
   * Tell if this object contains a java String object.
   *
   * @return true if this XMLString can return a string without creating one.
   */
  public boolean hasString()
  {
    return true;
  }

  Cast result object to a number.
Returns: 0.0 if this string is null, numeric value of this string
or NaN/**
   * Cast result object to a number.
   *
   * @return 0.0 if this string is null, numeric value of this string
   * or NaN
   */
  public double num()
  {
    return toDouble();
  }

  Convert a string to a double -- Allowed input is in fixed
notation ddd.fff.
Returns: A double value representation of the string, or return Double.NaN
if the string can not be converted./**
   * Convert a string to a double -- Allowed input is in fixed
   * notation ddd.fff.
   *
   * @return A double value representation of the string, or return Double.NaN
   * if the string can not be converted.
   */
  public double toDouble()
  {
    /* XMLCharacterRecognizer.isWhiteSpace(char c) methods treats the following
     * characters as white space characters.
     * ht - horizontal tab, nl - newline , cr - carriage return and sp - space
     * trim() methods by default also takes care of these white space characters
     * So trim() method is used to remove leading and trailing white spaces.
     */
        XMLString s = trim();
        double result = Double.NaN;
        for (int i = 0; i < s.length(); i++)
        {
                char c = s.charAt(i);
    if (c != '-' && c != '.' && ( c < 0X30 || c > 0x39)) {
            // The character is not a '-' or a '.' or a digit
            // then return NaN because something is wrong.
                        return result;
        }
        }
        try
        {
                result = Double.parseDouble(s.toString());
        } catch (NumberFormatException e){}

        return result;
}

  Cast result object to a boolean.
Returns: True if the length of this string object is greater
than 0./**
   * Cast result object to a boolean.
   *
   * @return True if the length of this string object is greater
   * than 0.
   */
  public boolean bool()
  {
    return str().length() > 0;
  }

  Cast result object to a string.
Returns: The string this wraps or the empty string if null/**
   * Cast result object to a string.
   *
   * @return The string this wraps or the empty string if null
   */
  public XMLString xstr()
  {
    return this;
  }

  Cast result object to a string.
Returns: The string this wraps or the empty string if null/**
   * Cast result object to a string.
   *
   * @return The string this wraps or the empty string if null
   */
  public String str()
  {
    return (null != m_obj) ? ((String) m_obj) : "";
  }

  Cast result object to a result tree fragment.
Params: support – Xpath context to use for the conversion
Returns: A document fragment with this string as a child node/**
   * Cast result object to a result tree fragment.
   *
   * @param support Xpath context to use for the conversion
   *
   * @return A document fragment with this string as a child node
   */
  public int rtf(XPathContext support)
  {

    DTM frag = support.createDocumentFragment();

    frag.appendTextChild(str());

    return frag.getDocument();
  }

  Directly call the
characters method on the passed ContentHandler for the
string-value. Multiple calls to the
ContentHandler's characters methods may well occur for a single call to
this method.
Params: ch – A non-null reference to a ContentHandler.
Throws: SAXException – /**
   * Directly call the
   * characters method on the passed ContentHandler for the
   * string-value. Multiple calls to the
   * ContentHandler's characters methods may well occur for a single call to
   * this method.
   *
   * @param ch A non-null reference to a ContentHandler.
   *
   * @throws org.xml.sax.SAXException
   */
  public void dispatchCharactersEvents(org.xml.sax.ContentHandler ch)
          throws org.xml.sax.SAXException
  {

    String str = str();

    ch.characters(str.toCharArray(), 0, str.length());
  }

  Directly call the
comment method on the passed LexicalHandler for the
string-value.
Params: lh – A non-null reference to a LexicalHandler.
Throws: SAXException – /**
   * Directly call the
   * comment method on the passed LexicalHandler for the
   * string-value.
   *
   * @param lh A non-null reference to a LexicalHandler.
   *
   * @throws org.xml.sax.SAXException
   */
  public void dispatchAsComment(org.xml.sax.ext.LexicalHandler lh)
          throws org.xml.sax.SAXException
  {

    String str = str();

    lh.comment(str.toCharArray(), 0, str.length());
  }

  Returns the length of this string.
Returns:  the length of the sequence of characters represented by this
         object./**
   * Returns the length of this string.
   *
   * @return  the length of the sequence of characters represented by this
   *          object.
   */
  public int length()
  {
    return str().length();
  }

  Returns the character at the specified index. An index ranges
from 0 to length() - 1. The first character
of the sequence is at index 0, the next at index
1, and so on, as for array indexing.
Params: index –   the index of the character.
Throws: IndexOutOfBoundsException –  if the index
            argument is negative or not less than the length of this
            string.
Returns:     the character at the specified index of this string.
            The first character is at index 0./**
   * Returns the character at the specified index. An index ranges
   * from <code>0</code> to <code>length() - 1</code>. The first character
   * of the sequence is at index <code>0</code>, the next at index
   * <code>1</code>, and so on, as for array indexing.
   *
   * @param      index   the index of the character.
   * @return     the character at the specified index of this string.
   *             The first character is at index <code>0</code>.
   * @exception  IndexOutOfBoundsException  if the <code>index</code>
   *             argument is negative or not less than the length of this
   *             string.
   */
  public char charAt(int index)
  {
    return str().charAt(index);
  }

  Copies characters from this string into the destination character
array.
Params: srcBegin –   index of the first character in the string
                       to copy.
srcEnd –     index after the last character in the string
                       to copy.
dst –        the destination array.
dstBegin –   the start offset in the destination array.
Throws: IndexOutOfBoundsException – If any of the following
           is true:
           srcBegin is negative.
           
srcBegin is greater than srcEnd
           
srcEnd is greater than the length of this
               string
           
dstBegin is negative
           
dstBegin+(srcEnd-srcBegin) is larger than
               dst.length
NullPointerException – if dst is null/**
   * Copies characters from this string into the destination character
   * array.
   *
   * @param      srcBegin   index of the first character in the string
   *                        to copy.
   * @param      srcEnd     index after the last character in the string
   *                        to copy.
   * @param      dst        the destination array.
   * @param      dstBegin   the start offset in the destination array.
   * @exception IndexOutOfBoundsException If any of the following
   *            is true:
   *            <ul><li><code>srcBegin</code> is negative.
   *            <li><code>srcBegin</code> is greater than <code>srcEnd</code>
   *            <li><code>srcEnd</code> is greater than the length of this
   *                string
   *            <li><code>dstBegin</code> is negative
   *            <li><code>dstBegin+(srcEnd-srcBegin)</code> is larger than
   *                <code>dst.length</code></ul>
   * @exception NullPointerException if <code>dst</code> is <code>null</code>
   */
  public void getChars(int srcBegin, int srcEnd, char dst[], int dstBegin)
  {
    str().getChars(srcBegin, srcEnd, dst, dstBegin);
  }

  Tell if two objects are functionally equal.
Params: obj2 – Object to compare this to
Throws: TransformerException – 
Returns: true if the two objects are equal/**
   * Tell if two objects are functionally equal.
   *
   * @param obj2 Object to compare this to
   *
   * @return true if the two objects are equal
   *
   * @throws javax.xml.transform.TransformerException
   */
  public boolean equals(XObject obj2)
  {

    // In order to handle the 'all' semantics of
    // nodeset comparisons, we always call the
    // nodeset function.
    int t = obj2.getType();
    try
    {
            if (XObject.CLASS_NODESET == t)
              return obj2.equals(this);
            // If at least one object to be compared is a boolean, then each object
            // to be compared is converted to a boolean as if by applying the
            // boolean function.
            else if(XObject.CLASS_BOOLEAN == t)
                return obj2.bool() == bool();
            // Otherwise, if at least one object to be compared is a number, then each object
            // to be compared is converted to a number as if by applying the number function.
            else if(XObject.CLASS_NUMBER == t)
                return obj2.num() == num();
    }
    catch(javax.xml.transform.TransformerException te)
    {
        throw new com.sun.org.apache.xml.internal.utils.WrappedRuntimeException(te);
    }

    // Otherwise, both objects to be compared are converted to strings as
    // if by applying the string function.
    return xstr().equals(obj2.xstr());
  }

   Compares this string to the specified String.
The result is true if and only if the argument is not
null and is a String object that represents
the same sequence of characters as this object.
Params: obj2 –   the object to compare this String against.
See Also: String.compareTo(String)
String.equalsIgnoreCase(String)
Returns:  true if the Strings are equal;
         false otherwise./**
   * Compares this string to the specified <code>String</code>.
   * The result is <code>true</code> if and only if the argument is not
   * <code>null</code> and is a <code>String</code> object that represents
   * the same sequence of characters as this object.
   *
   * @param   obj2   the object to compare this <code>String</code> against.
   * @return  <code>true</code> if the <code>String</code>s are equal;
   *          <code>false</code> otherwise.
   * @see     java.lang.String#compareTo(java.lang.String)
   * @see     java.lang.String#equalsIgnoreCase(java.lang.String)
   */
  public boolean equals(String obj2) {
    return str().equals(obj2);
  }

  Compares this string to the specified object.
The result is true if and only if the argument is not
null and is a String object that represents
the same sequence of characters as this object.
Params: obj2 –   the object to compare this String
                    against.
See Also: String.compareTo(String)
String.equalsIgnoreCase(String)
Returns:  true if the String are equal;
         false otherwise./**
   * Compares this string to the specified object.
   * The result is <code>true</code> if and only if the argument is not
   * <code>null</code> and is a <code>String</code> object that represents
   * the same sequence of characters as this object.
   *
   * @param obj2   the object to compare this <code>String</code>
   *                     against.
   * @return  <code>true</code> if the <code>String </code>are equal;
   *          <code>false</code> otherwise.
   * @see     java.lang.String#compareTo(java.lang.String)
   * @see     java.lang.String#equalsIgnoreCase(java.lang.String)
   */
  public boolean equals(XMLString obj2)
  {
    if (obj2 != null) {
      if (!obj2.hasString()) {
        return obj2.equals(str());
      } else {
        return str().equals(obj2.toString());
      }
    }
    return false;
  }

  Compares this string to the specified object.
The result is true if and only if the argument is not
null and is a String object that represents
the same sequence of characters as this object.
Params: obj2 –       the object to compare this String
                    against.
See Also: String.compareTo(String)
String.equalsIgnoreCase(String)
Returns:  true if the String are equal;
         false otherwise./**
   * Compares this string to the specified object.
   * The result is <code>true</code> if and only if the argument is not
   * <code>null</code> and is a <code>String</code> object that represents
   * the same sequence of characters as this object.
   *
   * @param   obj2       the object to compare this <code>String</code>
   *                     against.
   * @return  <code>true</code> if the <code>String </code>are equal;
   *          <code>false</code> otherwise.
   * @see     java.lang.String#compareTo(java.lang.String)
   * @see     java.lang.String#equalsIgnoreCase(java.lang.String)
   */
  public boolean equals(Object obj2)
  {

    if (null == obj2)
      return false;

      // In order to handle the 'all' semantics of
      // nodeset comparisons, we always call the
      // nodeset function.
    else if (obj2 instanceof XNodeSet)
      return obj2.equals(this);
    else if(obj2 instanceof XNumber)
        return obj2.equals(this);
    else
      return str().equals(obj2.toString());
  }

  Compares this String to another String,
ignoring case considerations.  Two strings are considered equal
ignoring case if they are of the same length, and corresponding
characters in the two strings are equal ignoring case.
Params: anotherString –   the String to compare this
                         String against.
See Also: equals(Object)
Character.toLowerCase(char)
Character.toUpperCase(char)
Returns:  true if the argument is not null
         and the Strings are equal,
         ignoring case; false otherwise./**
   * Compares this <code>String</code> to another <code>String</code>,
   * ignoring case considerations.  Two strings are considered equal
   * ignoring case if they are of the same length, and corresponding
   * characters in the two strings are equal ignoring case.
   *
   * @param   anotherString   the <code>String</code> to compare this
   *                          <code>String</code> against.
   * @return  <code>true</code> if the argument is not <code>null</code>
   *          and the <code>String</code>s are equal,
   *          ignoring case; <code>false</code> otherwise.
   * @see     #equals(Object)
   * @see     java.lang.Character#toLowerCase(char)
   * @see java.lang.Character#toUpperCase(char)
   */
  public boolean equalsIgnoreCase(String anotherString)
  {
    return str().equalsIgnoreCase(anotherString);
  }

  Compares two strings lexicographically.
Params: xstr –   the String to be compared.
Throws: NullPointerException – if anotherString
         is null.
Returns:  the value 0 if the argument string is equal to
         this string; a value less than 0 if this string
         is lexicographically less than the string argument; and a
         value greater than 0 if this string is
         lexicographically greater than the string argument./**
   * Compares two strings lexicographically.
   *
   * @param   xstr   the <code>String</code> to be compared.
   *
   * @return  the value <code>0</code> if the argument string is equal to
   *          this string; a value less than <code>0</code> if this string
   *          is lexicographically less than the string argument; and a
   *          value greater than <code>0</code> if this string is
   *          lexicographically greater than the string argument.
   * @exception java.lang.NullPointerException if <code>anotherString</code>
   *          is <code>null</code>.
   */
  public int compareTo(XMLString xstr)
  {

    int len1 = this.length();
    int len2 = xstr.length();
    int n = Math.min(len1, len2);
    int i = 0;
    int j = 0;

    while (n-- != 0)
    {
      char c1 = this.charAt(i);
      char c2 = xstr.charAt(j);

      if (c1 != c2)
      {
        return c1 - c2;
      }

      i++;
      j++;
    }

    return len1 - len2;
  }

  Compares two strings lexicographically, ignoring case considerations.
This method returns an integer whose sign is that of
this.toUpperCase().toLowerCase().compareTo(
str.toUpperCase().toLowerCase()).

Note that this method does not take locale into account,
and will result in an unsatisfactory ordering for certain locales.
The java.text package provides collators to allow
locale-sensitive ordering.
Params: str –   the String to be compared.
See Also: Collator.compare(String, String)
Returns:  a negative integer, zero, or a positive integer as the
         the specified String is greater than, equal to, or less
         than this String, ignoring case considerations.
Since:   1.2/**
   * Compares two strings lexicographically, ignoring case considerations.
   * This method returns an integer whose sign is that of
   * <code>this.toUpperCase().toLowerCase().compareTo(
   * str.toUpperCase().toLowerCase())</code>.
   * <p>
   * Note that this method does <em>not</em> take locale into account,
   * and will result in an unsatisfactory ordering for certain locales.
   * The java.text package provides <em>collators</em> to allow
   * locale-sensitive ordering.
   *
   * @param   str   the <code>String</code> to be compared.
   * @return  a negative integer, zero, or a positive integer as the
   *          the specified String is greater than, equal to, or less
   *          than this String, ignoring case considerations.
   * @see     java.text.Collator#compare(String, String)
   * @since   1.2
   */
  public int compareToIgnoreCase(XMLString str)
  {
    // %REVIEW%  Like it says, @since 1.2. Doesn't exist in earlier
    // versions of Java, hence we can't yet shell out to it. We can implement
    // it as character-by-character compare, but doing so efficiently
    // is likely to be (ahem) interesting.
    //
    // However, since nobody is actually _using_ this method yet:
    //    return str().compareToIgnoreCase(str.toString());

    throw new com.sun.org.apache.xml.internal.utils.WrappedRuntimeException(
      new java.lang.NoSuchMethodException(
        "Java 1.2 method, not yet implemented"));
  }

  Tests if this string starts with the specified prefix beginning
a specified index.
Params: prefix –    the prefix.
toffset –   where to begin looking in the string.
Throws: NullPointerException – if prefix is
         null.
Returns:  true if the character sequence represented by the
         argument is a prefix of the substring of this object starting
         at index toffset; false otherwise.
         The result is false if toffset is
         negative or greater than the length of this
         String object; otherwise the result is the same
         as the result of the expression
                  this.subString(toffset).startsWith(prefix)
         /**
   * Tests if this string starts with the specified prefix beginning
   * a specified index.
   *
   * @param   prefix    the prefix.
   * @param   toffset   where to begin looking in the string.
   * @return  <code>true</code> if the character sequence represented by the
   *          argument is a prefix of the substring of this object starting
   *          at index <code>toffset</code>; <code>false</code> otherwise.
   *          The result is <code>false</code> if <code>toffset</code> is
   *          negative or greater than the length of this
   *          <code>String</code> object; otherwise the result is the same
   *          as the result of the expression
   *          <pre>
   *          this.subString(toffset).startsWith(prefix)
   *          </pre>
   * @exception java.lang.NullPointerException if <code>prefix</code> is
   *          <code>null</code>.
   */
  public boolean startsWith(String prefix, int toffset)
  {
    return str().startsWith(prefix, toffset);
  }

  Tests if this string starts with the specified prefix.
Params: prefix –   the prefix.
Throws: NullPointerException – if prefix is
         null.
Returns:  true if the character sequence represented by the
         argument is a prefix of the character sequence represented by
         this string; false otherwise.
         Note also that true will be returned if the
         argument is an empty string or is equal to this
         String object as determined by the equals(Object) method./**
   * Tests if this string starts with the specified prefix.
   *
   * @param   prefix   the prefix.
   * @return  <code>true</code> if the character sequence represented by the
   *          argument is a prefix of the character sequence represented by
   *          this string; <code>false</code> otherwise.
   *          Note also that <code>true</code> will be returned if the
   *          argument is an empty string or is equal to this
   *          <code>String</code> object as determined by the
   *          {@link #equals(Object)} method.
   * @exception java.lang.NullPointerException if <code>prefix</code> is
   *          <code>null</code>.
   */
  public boolean startsWith(String prefix)
  {
    return startsWith(prefix, 0);
  }

  Tests if this string starts with the specified prefix beginning
a specified index.
Params: prefix –    the prefix.
toffset –   where to begin looking in the string.
Throws: NullPointerException – if prefix is
         null.
Returns:  true if the character sequence represented by the
         argument is a prefix of the substring of this object starting
         at index toffset; false otherwise.
         The result is false if toffset is
         negative or greater than the length of this
         String object; otherwise the result is the same
         as the result of the expression
                  this.subString(toffset).startsWith(prefix)
         /**
   * Tests if this string starts with the specified prefix beginning
   * a specified index.
   *
   * @param   prefix    the prefix.
   * @param   toffset   where to begin looking in the string.
   * @return  <code>true</code> if the character sequence represented by the
   *          argument is a prefix of the substring of this object starting
   *          at index <code>toffset</code>; <code>false</code> otherwise.
   *          The result is <code>false</code> if <code>toffset</code> is
   *          negative or greater than the length of this
   *          <code>String</code> object; otherwise the result is the same
   *          as the result of the expression
   *          <pre>
   *          this.subString(toffset).startsWith(prefix)
   *          </pre>
   * @exception java.lang.NullPointerException if <code>prefix</code> is
   *          <code>null</code>.
   */
  public boolean startsWith(XMLString prefix, int toffset)
  {

    int to = toffset;
    int tlim = this.length();
    int po = 0;
    int pc = prefix.length();

    // Note: toffset might be near -1>>>1.
    if ((toffset < 0) || (toffset > tlim - pc))
    {
      return false;
    }

    while (--pc >= 0)
    {
      if (this.charAt(to) != prefix.charAt(po))
      {
        return false;
      }

      to++;
      po++;
    }

    return true;
  }

  Tests if this string starts with the specified prefix.
Params: prefix –   the prefix.
Throws: NullPointerException – if prefix is
         null.
Returns:  true if the character sequence represented by the
         argument is a prefix of the character sequence represented by
         this string; false otherwise.
         Note also that true will be returned if the
         argument is an empty string or is equal to this
         String object as determined by the equals(Object) method./**
   * Tests if this string starts with the specified prefix.
   *
   * @param   prefix   the prefix.
   * @return  <code>true</code> if the character sequence represented by the
   *          argument is a prefix of the character sequence represented by
   *          this string; <code>false</code> otherwise.
   *          Note also that <code>true</code> will be returned if the
   *          argument is an empty string or is equal to this
   *          <code>String</code> object as determined by the
   *          {@link #equals(Object)} method.
   * @exception java.lang.NullPointerException if <code>prefix</code> is
   *          <code>null</code>.
   */
  public boolean startsWith(XMLString prefix)
  {
    return startsWith(prefix, 0);
  }

  Tests if this string ends with the specified suffix.
Params: suffix –   the suffix.
Throws: NullPointerException – if suffix is
         null.
Returns:  true if the character sequence represented by the
         argument is a suffix of the character sequence represented by
         this object; false otherwise. Note that the
         result will be true if the argument is the
         empty string or is equal to this String object as determined by the equals(Object) method./**
   * Tests if this string ends with the specified suffix.
   *
   * @param   suffix   the suffix.
   * @return  <code>true</code> if the character sequence represented by the
   *          argument is a suffix of the character sequence represented by
   *          this object; <code>false</code> otherwise. Note that the
   *          result will be <code>true</code> if the argument is the
   *          empty string or is equal to this <code>String</code> object
   *          as determined by the {@link #equals(Object)} method.
   * @exception java.lang.NullPointerException if <code>suffix</code> is
   *          <code>null</code>.
   */
  public boolean endsWith(String suffix)
  {
    return str().endsWith(suffix);
  }

  Returns a hashcode for this string. The hashcode for a
String object is computed as
s[0]*31^(n-1) + s[1]*31^(n-2) + ... + s[n-1]

using int arithmetic, where s[i] is the
ith character of the string, n is the length of
the string, and ^ indicates exponentiation.
(The hash value of the empty string is zero.)
Returns:  a hash code value for this object./**
   * Returns a hashcode for this string. The hashcode for a
   * <code>String</code> object is computed as
   * <blockquote><pre>
   * s[0]*31^(n-1) + s[1]*31^(n-2) + ... + s[n-1]
   * </pre></blockquote>
   * using <code>int</code> arithmetic, where <code>s[i]</code> is the
   * <i>i</i>th character of the string, <code>n</code> is the length of
   * the string, and <code>^</code> indicates exponentiation.
   * (The hash value of the empty string is zero.)
   *
   * @return  a hash code value for this object.
   */
  public int hashCode()
  {
    return str().hashCode();
  }

  Returns the index within this string of the first occurrence of the
specified character. If a character with value ch occurs
in the character sequence represented by this String
object, then the index of the first such occurrence is returned --
that is, the smallest value k such that:
this.charAt(k) == ch

is true. If no such character occurs in this string,
then -1 is returned.
Params: ch –   a character.
Returns:  the index of the first occurrence of the character in the
         character sequence represented by this object, or
         -1 if the character does not occur./**
   * Returns the index within this string of the first occurrence of the
   * specified character. If a character with value <code>ch</code> occurs
   * in the character sequence represented by this <code>String</code>
   * object, then the index of the first such occurrence is returned --
   * that is, the smallest value <i>k</i> such that:
   * <blockquote><pre>
   * this.charAt(<i>k</i>) == ch
   * </pre></blockquote>
   * is <code>true</code>. If no such character occurs in this string,
   * then <code>-1</code> is returned.
   *
   * @param   ch   a character.
   * @return  the index of the first occurrence of the character in the
   *          character sequence represented by this object, or
   *          <code>-1</code> if the character does not occur.
   */
  public int indexOf(int ch)
  {
    return str().indexOf(ch);
  }

  Returns the index within this string of the first occurrence of the
specified character, starting the search at the specified index.

If a character with value ch occurs in the character
sequence represented by this String object at an index
no smaller than fromIndex, then the index of the first
such occurrence is returned--that is, the smallest value k
such that:
(this.charAt(k) == ch) && (k >= fromIndex)

is true. If no such character occurs in this string at or after
position fromIndex, then -1 is returned.

There is no restriction on the value of fromIndex. If it
is negative, it has the same effect as if it were zero: this entire
string may be searched. If it is greater than the length of this
string, it has the same effect as if it were equal to the length of
this string: -1 is returned.
Params: ch –          a character.
fromIndex –   the index to start the search from.
Returns:  the index of the first occurrence of the character in the
         character sequence represented by this object that is greater
         than or equal to fromIndex, or -1
         if the character does not occur./**
   * Returns the index within this string of the first occurrence of the
   * specified character, starting the search at the specified index.
   * <p>
   * If a character with value <code>ch</code> occurs in the character
   * sequence represented by this <code>String</code> object at an index
   * no smaller than <code>fromIndex</code>, then the index of the first
   * such occurrence is returned--that is, the smallest value <i>k</i>
   * such that:
   * <blockquote><pre>
   * (this.charAt(<i>k</i>) == ch) && (<i>k</i> >= fromIndex)
   * </pre></blockquote>
   * is true. If no such character occurs in this string at or after
   * position <code>fromIndex</code>, then <code>-1</code> is returned.
   * <p>
   * There is no restriction on the value of <code>fromIndex</code>. If it
   * is negative, it has the same effect as if it were zero: this entire
   * string may be searched. If it is greater than the length of this
   * string, it has the same effect as if it were equal to the length of
   * this string: <code>-1</code> is returned.
   *
   * @param   ch          a character.
   * @param   fromIndex   the index to start the search from.
   * @return  the index of the first occurrence of the character in the
   *          character sequence represented by this object that is greater
   *          than or equal to <code>fromIndex</code>, or <code>-1</code>
   *          if the character does not occur.
   */
  public int indexOf(int ch, int fromIndex)
  {
    return str().indexOf(ch, fromIndex);
  }

  Returns the index within this string of the last occurrence of the
specified character. That is, the index returned is the largest
value k such that:
this.charAt(k) == ch

is true.
The String is searched backwards starting at the last character.
Params: ch –   a character.
Returns:  the index of the last occurrence of the character in the
         character sequence represented by this object, or
         -1 if the character does not occur./**
   * Returns the index within this string of the last occurrence of the
   * specified character. That is, the index returned is the largest
   * value <i>k</i> such that:
   * <blockquote><pre>
   * this.charAt(<i>k</i>) == ch
   * </pre></blockquote>
   * is true.
   * The String is searched backwards starting at the last character.
   *
   * @param   ch   a character.
   * @return  the index of the last occurrence of the character in the
   *          character sequence represented by this object, or
   *          <code>-1</code> if the character does not occur.
   */
  public int lastIndexOf(int ch)
  {
    return str().lastIndexOf(ch);
  }

  Returns the index within this string of the last occurrence of the
specified character, searching backward starting at the specified
index. That is, the index returned is the largest value k
such that:
this.charAt(k) == ch) && (k <= fromIndex)

is true.
Params: ch –          a character.
fromIndex –   the index to start the search from. There is no
         restriction on the value of fromIndex. If it is
         greater than or equal to the length of this string, it has
         the same effect as if it were equal to one less than the
         length of this string: this entire string may be searched.
         If it is negative, it has the same effect as if it were -1:
         -1 is returned.
Returns:  the index of the last occurrence of the character in the
         character sequence represented by this object that is less
         than or equal to fromIndex, or -1
         if the character does not occur before that point./**
   * Returns the index within this string of the last occurrence of the
   * specified character, searching backward starting at the specified
   * index. That is, the index returned is the largest value <i>k</i>
   * such that:
   * <blockquote><pre>
   * this.charAt(k) == ch) && (k <= fromIndex)
   * </pre></blockquote>
   * is true.
   *
   * @param   ch          a character.
   * @param   fromIndex   the index to start the search from. There is no
   *          restriction on the value of <code>fromIndex</code>. If it is
   *          greater than or equal to the length of this string, it has
   *          the same effect as if it were equal to one less than the
   *          length of this string: this entire string may be searched.
   *          If it is negative, it has the same effect as if it were -1:
   *          -1 is returned.
   * @return  the index of the last occurrence of the character in the
   *          character sequence represented by this object that is less
   *          than or equal to <code>fromIndex</code>, or <code>-1</code>
   *          if the character does not occur before that point.
   */
  public int lastIndexOf(int ch, int fromIndex)
  {
    return str().lastIndexOf(ch, fromIndex);
  }

  Returns the index within this string of the first occurrence of the
specified substring. The integer returned is the smallest value
k such that:
this.startsWith(str, k)

is true.
Params: str –   any string.
Throws: NullPointerException – if str is
         null.
Returns:  if the string argument occurs as a substring within this
         object, then the index of the first character of the first
         such substring is returned; if it does not occur as a
         substring, -1 is returned./**
   * Returns the index within this string of the first occurrence of the
   * specified substring. The integer returned is the smallest value
   * <i>k</i> such that:
   * <blockquote><pre>
   * this.startsWith(str, <i>k</i>)
   * </pre></blockquote>
   * is <code>true</code>.
   *
   * @param   str   any string.
   * @return  if the string argument occurs as a substring within this
   *          object, then the index of the first character of the first
   *          such substring is returned; if it does not occur as a
   *          substring, <code>-1</code> is returned.
   * @exception java.lang.NullPointerException if <code>str</code> is
   *          <code>null</code>.
   */
  public int indexOf(String str)
  {
    return str().indexOf(str);
  }

  Returns the index within this string of the first occurrence of the
specified substring. The integer returned is the smallest value
k such that:
this.startsWith(str, k)

is true.
Params: str –   any string.
Throws: NullPointerException – if str is
         null.
Returns:  if the string argument occurs as a substring within this
         object, then the index of the first character of the first
         such substring is returned; if it does not occur as a
         substring, -1 is returned./**
   * Returns the index within this string of the first occurrence of the
   * specified substring. The integer returned is the smallest value
   * <i>k</i> such that:
   * <blockquote><pre>
   * this.startsWith(str, <i>k</i>)
   * </pre></blockquote>
   * is <code>true</code>.
   *
   * @param   str   any string.
   * @return  if the string argument occurs as a substring within this
   *          object, then the index of the first character of the first
   *          such substring is returned; if it does not occur as a
   *          substring, <code>-1</code> is returned.
   * @exception java.lang.NullPointerException if <code>str</code> is
   *          <code>null</code>.
   */
  public int indexOf(XMLString str)
  {
    return str().indexOf(str.toString());
  }

  Returns the index within this string of the first occurrence of the
specified substring, starting at the specified index. The integer
returned is the smallest value k such that:
this.startsWith(str, k) && (k >= fromIndex)

is true.

There is no restriction on the value of fromIndex. If
it is negative, it has the same effect as if it were zero: this entire
string may be searched. If it is greater than the length of this
string, it has the same effect as if it were equal to the length of
this string: -1 is returned.
Params: str –         the substring to search for.
fromIndex –   the index to start the search from.
Throws: NullPointerException – if str is
         null
Returns:  If the string argument occurs as a substring within this
         object at a starting index no smaller than
         fromIndex, then the index of the first character
         of the first such substring is returned. If it does not occur
         as a substring starting at fromIndex or beyond,
         -1 is returned./**
   * Returns the index within this string of the first occurrence of the
   * specified substring, starting at the specified index. The integer
   * returned is the smallest value <i>k</i> such that:
   * <blockquote><pre>
   * this.startsWith(str, <i>k</i>) && (<i>k</i> >= fromIndex)
   * </pre></blockquote>
   * is <code>true</code>.
   * <p>
   * There is no restriction on the value of <code>fromIndex</code>. If
   * it is negative, it has the same effect as if it were zero: this entire
   * string may be searched. If it is greater than the length of this
   * string, it has the same effect as if it were equal to the length of
   * this string: <code>-1</code> is returned.
   *
   * @param   str         the substring to search for.
   * @param   fromIndex   the index to start the search from.
   * @return  If the string argument occurs as a substring within this
   *          object at a starting index no smaller than
   *          <code>fromIndex</code>, then the index of the first character
   *          of the first such substring is returned. If it does not occur
   *          as a substring starting at <code>fromIndex</code> or beyond,
   *          <code>-1</code> is returned.
   * @exception java.lang.NullPointerException if <code>str</code> is
   *          <code>null</code>
   */
  public int indexOf(String str, int fromIndex)
  {
    return str().indexOf(str, fromIndex);
  }

  Returns the index within this string of the rightmost occurrence
of the specified substring.  The rightmost empty string "" is
considered to occur at the index value this.length().
The returned index is the largest value k such that
this.startsWith(str, k)

is true.
Params: str –   the substring to search for.
Throws: NullPointerException –  if str is
         null.
Returns:  if the string argument occurs one or more times as a substring
         within this object, then the index of the first character of
         the last such substring is returned. If it does not occur as
         a substring, -1 is returned./**
   * Returns the index within this string of the rightmost occurrence
   * of the specified substring.  The rightmost empty string "" is
   * considered to occur at the index value <code>this.length()</code>.
   * The returned index is the largest value <i>k</i> such that
   * <blockquote><pre>
   * this.startsWith(str, k)
   * </pre></blockquote>
   * is true.
   *
   * @param   str   the substring to search for.
   * @return  if the string argument occurs one or more times as a substring
   *          within this object, then the index of the first character of
   *          the last such substring is returned. If it does not occur as
   *          a substring, <code>-1</code> is returned.
   * @exception java.lang.NullPointerException  if <code>str</code> is
   *          <code>null</code>.
   */
  public int lastIndexOf(String str)
  {
    return str().lastIndexOf(str);
  }

  Returns the index within this string of the last occurrence of
the specified substring.
Params: str –         the substring to search for.
fromIndex –   the index to start the search from. There is no
         restriction on the value of fromIndex. If it is greater than
         the length of this string, it has the same effect as if it
         were equal to the length of this string: this entire string
         may be searched. If it is negative, it has the same effect
         as if it were -1: -1 is returned.
Throws: NullPointerException – if str is
         null.
Returns:  If the string argument occurs one or more times as a substring
         within this object at a starting index no greater than
         fromIndex, then the index of the first character of
         the last such substring is returned. If it does not occur as a
         substring starting at fromIndex or earlier,
         -1 is returned./**
   * Returns the index within this string of the last occurrence of
   * the specified substring.
   *
   * @param   str         the substring to search for.
   * @param   fromIndex   the index to start the search from. There is no
   *          restriction on the value of fromIndex. If it is greater than
   *          the length of this string, it has the same effect as if it
   *          were equal to the length of this string: this entire string
   *          may be searched. If it is negative, it has the same effect
   *          as if it were -1: -1 is returned.
   * @return  If the string argument occurs one or more times as a substring
   *          within this object at a starting index no greater than
   *          <code>fromIndex</code>, then the index of the first character of
   *          the last such substring is returned. If it does not occur as a
   *          substring starting at <code>fromIndex</code> or earlier,
   *          <code>-1</code> is returned.
   * @exception java.lang.NullPointerException if <code>str</code> is
   *          <code>null</code>.
   */
  public int lastIndexOf(String str, int fromIndex)
  {
    return str().lastIndexOf(str, fromIndex);
  }

  Returns a new string that is a substring of this string. The
substring begins with the character at the specified index and
extends to the end of this string. 
Examples:
"unhappy".substring(2) returns "happy"
"Harbison".substring(3) returns "bison"
"emptiness".substring(9) returns "" (an empty string)

Params: beginIndex –   the beginning index, inclusive.
Throws: IndexOutOfBoundsException –  if
            beginIndex is negative or larger than the
            length of this String object.
Returns:     the specified substring./**
   * Returns a new string that is a substring of this string. The
   * substring begins with the character at the specified index and
   * extends to the end of this string. <p>
   * Examples:
   * <blockquote><pre>
   * "unhappy".substring(2) returns "happy"
   * "Harbison".substring(3) returns "bison"
   * "emptiness".substring(9) returns "" (an empty string)
   * </pre></blockquote>
   *
   * @param      beginIndex   the beginning index, inclusive.
   * @return     the specified substring.
   * @exception  IndexOutOfBoundsException  if
   *             <code>beginIndex</code> is negative or larger than the
   *             length of this <code>String</code> object.
   */
  public XMLString substring(int beginIndex)
  {
    return new XString(str().substring(beginIndex));
  }

  Returns a new string that is a substring of this string. The
substring begins at the specified beginIndex and
extends to the character at index endIndex - 1.
Thus the length of the substring is endIndex-beginIndex.
Params: beginIndex –   the beginning index, inclusive.
endIndex –     the ending index, exclusive.
Throws: IndexOutOfBoundsException –  if the
            beginIndex is negative, or
            endIndex is larger than the length of
            this String object, or
            beginIndex is larger than
            endIndex.
Returns:     the specified substring./**
   * Returns a new string that is a substring of this string. The
   * substring begins at the specified <code>beginIndex</code> and
   * extends to the character at index <code>endIndex - 1</code>.
   * Thus the length of the substring is <code>endIndex-beginIndex</code>.
   *
   * @param      beginIndex   the beginning index, inclusive.
   * @param      endIndex     the ending index, exclusive.
   * @return     the specified substring.
   * @exception  IndexOutOfBoundsException  if the
   *             <code>beginIndex</code> is negative, or
   *             <code>endIndex</code> is larger than the length of
   *             this <code>String</code> object, or
   *             <code>beginIndex</code> is larger than
   *             <code>endIndex</code>.
   */
  public XMLString substring(int beginIndex, int endIndex)
  {
    return new XString(str().substring(beginIndex, endIndex));
  }

  Concatenates the specified string to the end of this string.
Params: str –   the String that is concatenated to the end
               of this String.
Throws: NullPointerException – if str is
         null.
Returns:  a string that represents the concatenation of this object's
         characters followed by the string argument's characters./**
   * Concatenates the specified string to the end of this string.
   *
   * @param   str   the <code>String</code> that is concatenated to the end
   *                of this <code>String</code>.
   * @return  a string that represents the concatenation of this object's
   *          characters followed by the string argument's characters.
   * @exception java.lang.NullPointerException if <code>str</code> is
   *          <code>null</code>.
   */
  public XMLString concat(String str)
  {

    // %REVIEW% Make an FSB here?
    return new XString(str().concat(str));
  }

  Converts all of the characters in this String to lower
case using the rules of the given Locale.
Params: locale – use the case transformation rules for this locale
See Also: Character.toLowerCase(char)
String.toUpperCase(Locale)
Returns: the String, converted to lowercase./**
   * Converts all of the characters in this <code>String</code> to lower
   * case using the rules of the given <code>Locale</code>.
   *
   * @param locale use the case transformation rules for this locale
   * @return the String, converted to lowercase.
   * @see     java.lang.Character#toLowerCase(char)
   * @see     java.lang.String#toUpperCase(Locale)
   */
  public XMLString toLowerCase(Locale locale)
  {
    return new XString(str().toLowerCase(locale));
  }

  Converts all of the characters in this String to lower
case using the rules of the default locale, which is returned
by Locale.getDefault.

See Also: Character.toLowerCase(char)
String.toLowerCase(Locale)
Returns:  the string, converted to lowercase./**
   * Converts all of the characters in this <code>String</code> to lower
   * case using the rules of the default locale, which is returned
   * by <code>Locale.getDefault</code>.
   * <p>
   *
   * @return  the string, converted to lowercase.
   * @see     java.lang.Character#toLowerCase(char)
   * @see     java.lang.String#toLowerCase(Locale)
   */
  public XMLString toLowerCase()
  {
    return new XString(str().toLowerCase());
  }

  Converts all of the characters in this String to upper
case using the rules of the given locale.
Params: locale – use the case transformation rules for this locale
See Also: Character.toUpperCase(char)
String.toLowerCase(Locale)
Returns: the String, converted to uppercase./**
   * Converts all of the characters in this <code>String</code> to upper
   * case using the rules of the given locale.
   * @param locale use the case transformation rules for this locale
   * @return the String, converted to uppercase.
   * @see     java.lang.Character#toUpperCase(char)
   * @see     java.lang.String#toLowerCase(Locale)
   */
  public XMLString toUpperCase(Locale locale)
  {
    return new XString(str().toUpperCase(locale));
  }

  Converts all of the characters in this String to upper
case using the rules of the default locale, which is returned
by Locale.getDefault.

If no character in this string has a different uppercase version,
based on calling the toUpperCase method defined by
Character, then the original string is returned.

Otherwise, this method creates a new String object
representing a character sequence identical in length to the
character sequence represented by this String object and
with every character equal to the result of applying the method
Character.toUpperCase to the corresponding character of
this String object. 

Examples:
"Fahrvergnügen".toUpperCase() returns "FAHRVERGNÜGEN"
"Visit Ljubinje!".toUpperCase() returns "VISIT LJUBINJE!"

See Also: Character.toUpperCase(char)
String.toUpperCase(Locale)
Returns:  the string, converted to uppercase./**
   * Converts all of the characters in this <code>String</code> to upper
   * case using the rules of the default locale, which is returned
   * by <code>Locale.getDefault</code>.
   *
   * <p>
   * If no character in this string has a different uppercase version,
   * based on calling the <code>toUpperCase</code> method defined by
   * <code>Character</code>, then the original string is returned.
   * <p>
   * Otherwise, this method creates a new <code>String</code> object
   * representing a character sequence identical in length to the
   * character sequence represented by this <code>String</code> object and
   * with every character equal to the result of applying the method
   * <code>Character.toUpperCase</code> to the corresponding character of
   * this <code>String</code> object. <p>
   * Examples:
   * <blockquote><pre>
   * "Fahrvergn&uuml;gen".toUpperCase() returns "FAHRVERGN&Uuml;GEN"
   * "Visit Ljubinje!".toUpperCase() returns "VISIT LJUBINJE!"
   * </pre></blockquote>
   *
   * @return  the string, converted to uppercase.
   * @see     java.lang.Character#toUpperCase(char)
   * @see     java.lang.String#toUpperCase(Locale)
   */
  public XMLString toUpperCase()
  {
    return new XString(str().toUpperCase());
  }

  Removes white space from both ends of this string.
Returns:  this string, with white space removed from the front and end./**
   * Removes white space from both ends of this string.
   *
   * @return  this string, with white space removed from the front and end.
   */
  public XMLString trim()
  {
    return new XString(str().trim());
  }

  Returns whether the specified ch conforms to the XML 1.0 definition
of whitespace.  Refer to 
the definition of S for details.
Params: ch –      Character to check as XML whitespace.
Returns:          =true if ch is XML whitespace; otherwise =false./**
   * Returns whether the specified <var>ch</var> conforms to the XML 1.0 definition
   * of whitespace.  Refer to <A href="http://www.w3.org/TR/1998/REC-xml-19980210#NT-S">
   * the definition of <CODE>S</CODE></A> for details.
   * @param   ch      Character to check as XML whitespace.
   * @return          =true if <var>ch</var> is XML whitespace; otherwise =false.
   */
  private static boolean isSpace(char ch)
  {
    return XMLCharacterRecognizer.isWhiteSpace(ch);  // Take the easy way out for now.
  }

  Conditionally trim all leading and trailing whitespace in the specified String.
All strings of white space are
replaced by a single space character (#x20), except spaces after punctuation which
receive double spaces if doublePunctuationSpaces is true.
This function may be useful to a formatter, but to get first class
results, the formatter should probably do it's own white space handling
based on the semantics of the formatting object.
Params: trimHead –    Trim leading whitespace?
trimTail –    Trim trailing whitespace?
doublePunctuationSpaces –    Use double spaces for punctuation?
Returns:              The trimmed string./**
   * Conditionally trim all leading and trailing whitespace in the specified String.
   * All strings of white space are
   * replaced by a single space character (#x20), except spaces after punctuation which
   * receive double spaces if doublePunctuationSpaces is true.
   * This function may be useful to a formatter, but to get first class
   * results, the formatter should probably do it's own white space handling
   * based on the semantics of the formatting object.
   *
   * @param   trimHead    Trim leading whitespace?
   * @param   trimTail    Trim trailing whitespace?
   * @param   doublePunctuationSpaces    Use double spaces for punctuation?
   * @return              The trimmed string.
   */
  public XMLString fixWhiteSpace(boolean trimHead, boolean trimTail,
                                 boolean doublePunctuationSpaces)
  {

    // %OPT% !!!!!!!
    int len = this.length();
    char[] buf = new char[len];

    this.getChars(0, len, buf, 0);

    boolean edit = false;
    int s;

    for (s = 0; s < len; s++)
    {
      if (isSpace(buf[s]))
      {
        break;
      }
    }

    /* replace S to ' '. and ' '+ -> single ' '. */
    int d = s;
    boolean pres = false;

    for (; s < len; s++)
    {
      char c = buf[s];

      if (isSpace(c))
      {
        if (!pres)
        {
          if (' ' != c)
          {
            edit = true;
          }

          buf[d++] = ' ';

          if (doublePunctuationSpaces && (s != 0))
          {
            char prevChar = buf[s - 1];

            if (!((prevChar == '.') || (prevChar == '!')
                  || (prevChar == '?')))
            {
              pres = true;
            }
          }
          else
          {
            pres = true;
          }
        }
        else
        {
          edit = true;
          pres = true;
        }
      }
      else
      {
        buf[d++] = c;
        pres = false;
      }
    }

    if (trimTail && 1 <= d && ' ' == buf[d - 1])
    {
      edit = true;

      d--;
    }

    int start = 0;

    if (trimHead && 0 < d && ' ' == buf[0])
    {
      edit = true;

      start++;
    }

    XMLStringFactory xsf = XMLStringFactoryImpl.getFactory();

    return edit ? xsf.newstr(new String(buf, start, d - start)) : this;
  }

  See Also: callVisitors.callVisitors(ExpressionOwner, XPathVisitor)/**
   * @see com.sun.org.apache.xpath.internal.XPathVisitable#callVisitors(ExpressionOwner, XPathVisitor)
   */
  public void callVisitors(ExpressionOwner owner, XPathVisitor visitor)
  {
        visitor.visitStringLiteral(owner, this);
  }

}
Params:	support – Xpath context to use for the conversion
Returns:	A document fragment with this string as a child node
Params:	ch – A non-null reference to a ContentHandler.
Throws:	SAXException –
Params:	lh – A non-null reference to a LexicalHandler.
Throws:	SAXException –
Params:	index – the index of the character.
Throws:	IndexOutOfBoundsException – if the `index` argument is negative or not less than the length of this string.
Returns:	the character at the specified index of this string. The first character is at index `0`.
Params:	srcBegin – index of the first character in the string to copy. srcEnd – index after the last character in the string to copy. dst – the destination array. dstBegin – the start offset in the destination array.
Throws:	IndexOutOfBoundsException – If any of the following is true: `srcBegin` is negative. `srcBegin` is greater than `srcEnd` `srcEnd` is greater than the length of this string `dstBegin` is negative `dstBegin+(srcEnd-srcBegin)` is larger than `dst.length` NullPointerException – if `dst` is `null`
Params:	obj2 – Object to compare this to
Throws:	TransformerException –
Returns:	true if the two objects are equal
Params:	obj2 – the object to compare this `String` against.
See Also:	String.compareTo(String) String.equalsIgnoreCase(String)
Returns:	`true` if the `String`s are equal; `false` otherwise.
Params:	anotherString – the `String` to compare this `String` against.
See Also:	equals(Object) Character.toLowerCase(char) Character.toUpperCase(char)
Returns:	`true` if the argument is not `null` and the `String`s are equal, ignoring case; `false` otherwise.
Params:	xstr – the `String` to be compared.
Throws:	NullPointerException – if `anotherString` is `null`.
Returns:	the value `0` if the argument string is equal to this string; a value less than `0` if this string is lexicographically less than the string argument; and a value greater than `0` if this string is lexicographically greater than the string argument.
Params:	str – the `String` to be compared.
See Also:	Collator.compare(String, String)
Returns:	a negative integer, zero, or a positive integer as the the specified String is greater than, equal to, or less than this String, ignoring case considerations.
Since:	1.2
Params:	prefix – the prefix. toffset – where to begin looking in the string.
Throws:	NullPointerException – if `prefix` is `null`.
Returns:	`true` if the character sequence represented by the argument is a prefix of the substring of this object starting at index `toffset`; `false` otherwise. The result is `false` if `toffset` is negative or greater than the length of this `String` object; otherwise the result is the same as the result of the expression this.subString(toffset).startsWith(prefix)
Params:	prefix – the prefix.
Throws:	NullPointerException – if `prefix` is `null`.
Returns:	`true` if the character sequence represented by the argument is a prefix of the character sequence represented by this string; `false` otherwise. Note also that `true` will be returned if the argument is an empty string or is equal to this `String` object as determined by the `equals(Object)` method.
Params:	suffix – the suffix.
Throws:	NullPointerException – if `suffix` is `null`.
Returns:	`true` if the character sequence represented by the argument is a suffix of the character sequence represented by this object; `false` otherwise. Note that the result will be `true` if the argument is the empty string or is equal to this `String` object as determined by the `equals(Object)` method.
Params:	ch – a character.
Returns:	the index of the first occurrence of the character in the character sequence represented by this object, or `-1` if the character does not occur.
Params:	ch – a character. fromIndex – the index to start the search from.
Returns:	the index of the first occurrence of the character in the character sequence represented by this object that is greater than or equal to `fromIndex`, or `-1` if the character does not occur.
Params:	str – any string.
Throws:	NullPointerException – if `str` is `null`.
Returns:	if the string argument occurs as a substring within this object, then the index of the first character of the first such substring is returned; if it does not occur as a substring, `-1` is returned.
Params:	str – the substring to search for. fromIndex – the index to start the search from.
Throws:	NullPointerException – if `str` is `null`
Returns:	If the string argument occurs as a substring within this object at a starting index no smaller than `fromIndex`, then the index of the first character of the first such substring is returned. If it does not occur as a substring starting at `fromIndex` or beyond, `-1` is returned.
Params:	str – the substring to search for.
Throws:	NullPointerException – if `str` is `null`.
Returns:	if the string argument occurs one or more times as a substring within this object, then the index of the first character of the last such substring is returned. If it does not occur as a substring, `-1` is returned.
Params:	beginIndex – the beginning index, inclusive.
Throws:	IndexOutOfBoundsException – if `beginIndex` is negative or larger than the length of this `String` object.
Returns:	the specified substring.
Params:	str – the `String` that is concatenated to the end of this `String`.
Throws:	NullPointerException – if `str` is `null`.
Returns:	a string that represents the concatenation of this object's characters followed by the string argument's characters.
/

java/ 16/ java.xml/com/sun/org/apache/xpath/internal/objects/XString.java
