java/12 : java.xml/com/sun/xml/internal/stream/XMLEntityReader.java

XMLEntityReader

https://openjdk.java.net/

GPLv2 + Classpath Exception

/*
 * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
 */
/*
 * 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
 * limitations under the License.
 */


package com.sun.xml.internal.stream;

import java.io.IOException;

import com.sun.org.apache.xerces.internal.util.XMLStringBuffer;
import com.sun.org.apache.xerces.internal.xni.*;

This class allows various parser scanners to scan basic XML constructs
from entities. This class works directly with the entity manager to
provide this functionality.

There is only one entity scanner and entity manager per parser. The
entity manager could implement the methods to perform entity
scanning, but the entity scanner class allows a cleaner separation
between entity management API and entity scanning.
Author: Andy Clark, IBM, Neeraj Bajaj Sun Microsystems, K.Venugopal Sun Microsystems
See Also: XMLEntityHandler
XMLEntityManager/**
 * This class allows various parser scanners to scan basic XML constructs
 * from entities. This class works directly with the entity manager to
 * provide this functionality.
 * <p>
 * There is only one entity scanner and entity manager per parser. The
 * entity manager <em>could</em> implement the methods to perform entity
 * scanning, but the entity scanner class allows a cleaner separation
 * between entity management API and entity scanning.
 *
 * @author Andy Clark, IBM
 * @author Neeraj Bajaj Sun Microsystems
 * @author K.Venugopal Sun Microsystems
 *
 * @see XMLEntityHandler
 * @see XMLEntityManager
 */
public abstract class XMLEntityReader implements XMLLocator {

    //
    // Public methods
    //


    Sets the encoding of the scanner. This method is used by the
scanners if the XMLDecl or TextDecl line contains an encoding
pseudo-attribute.

Note: The underlying character reader on the
current entity will be changed to accomodate the new encoding.
However, the new encoding is ignored if the current reader was
not constructed from an input stream (e.g. an external entity
that is resolved directly to the appropriate java.io.Reader
object).
Params: encoding – The IANA encoding name of the new encoding.
Throws: IOException –  Thrown if the new encoding is not supported.
See Also: EncodingMap
XMLChar.isValidIANAEncoding
XMLChar.isValidJavaEncoding/**
     * Sets the encoding of the scanner. This method is used by the
     * scanners if the XMLDecl or TextDecl line contains an encoding
     * pseudo-attribute.
     * <p>
     * <strong>Note:</strong> The underlying character reader on the
     * current entity will be changed to accomodate the new encoding.
     * However, the new encoding is ignored if the current reader was
     * not constructed from an input stream (e.g. an external entity
     * that is resolved directly to the appropriate java.io.Reader
     * object).
     *
     * @param encoding The IANA encoding name of the new encoding.
     *
     * @throws IOException  Thrown if the new encoding is not supported.
     *
     * @see com.sun.org.apache.xerces.internal.util.EncodingMap
     * @see com.sun.org.apache.xerces.internal.util.XMLChar#isValidIANAEncoding
     * @see com.sun.org.apache.xerces.internal.util.XMLChar#isValidJavaEncoding
     */
    public abstract void setEncoding(String encoding)
    throws IOException;

    public abstract String getEncoding() ;

    public abstract int getCharacterOffset() ;

    the version of the current entity being scanned or the version of the entity on which reader is operating /** the version of the current entity being scanned or the version of the entity on which reader is operating */
    public abstract void setVersion(String version) ;

    get the version of the entity on which reader is operating /** get the version of the entity on which reader is operating */
    public abstract String getVersion() ;

    Returns true if the current entity being scanned is external. /** Returns true if the current entity being scanned is external. */
    public abstract boolean isExternal();

    Returns the next character on the input.

Note: The character is not consumed.
Throws: IOException –  Thrown if i/o error occurs.
EOFException – Thrown on end of file./**
     * Returns the next character on the input.
     * <p>
     * <strong>Note:</strong> The character is <em>not</em> consumed.
     *
     * @throws IOException  Thrown if i/o error occurs.
     * @throws EOFException Thrown on end of file.
     */
    public abstract int peekChar() throws IOException;

    Returns the next character on the input.

Note: The character is consumed.
Throws: IOException –  Thrown if i/o error occurs.
EOFException – Thrown on end of file./**
     * Returns the next character on the input.
     * <p>
     * <strong>Note:</strong> The character is consumed.
     *
     * @throws IOException  Thrown if i/o error occurs.
     * @throws EOFException Thrown on end of file.
     */
    public abstract int scanChar() throws IOException;

    Returns a string matching the NMTOKEN production appearing immediately
on the input as a symbol, or null if NMTOKEN Name string is present.

Note: The NMTOKEN characters are consumed.

Note: The string returned must be a symbol. The
SymbolTable can be used for this purpose.
Throws: IOException –  Thrown if i/o error occurs.
EOFException – Thrown on end of file.
See Also: SymbolTable
XMLChar.isName/**
     * Returns a string matching the NMTOKEN production appearing immediately
     * on the input as a symbol, or null if NMTOKEN Name string is present.
     * <p>
     * <strong>Note:</strong> The NMTOKEN characters are consumed.
     * <p>
     * <strong>Note:</strong> The string returned must be a symbol. The
     * SymbolTable can be used for this purpose.
     *
     * @throws IOException  Thrown if i/o error occurs.
     * @throws EOFException Thrown on end of file.
     *
     * @see com.sun.org.apache.xerces.internal.util.SymbolTable
     * @see com.sun.org.apache.xerces.internal.util.XMLChar#isName
     */
    public abstract String scanNmtoken() throws IOException;

    Returns a string matching the Name production appearing immediately
on the input as a symbol, or null if no Name string is present.

Note: The Name characters are consumed.

Note: The string returned must be a symbol. The
SymbolTable can be used for this purpose.
Throws: IOException –  Thrown if i/o error occurs.
EOFException – Thrown on end of file.
See Also: SymbolTable
XMLChar.isName
XMLChar.isNameStart/**
     * Returns a string matching the Name production appearing immediately
     * on the input as a symbol, or null if no Name string is present.
     * <p>
     * <strong>Note:</strong> The Name characters are consumed.
     * <p>
     * <strong>Note:</strong> The string returned must be a symbol. The
     * SymbolTable can be used for this purpose.
     *
     * @throws IOException  Thrown if i/o error occurs.
     * @throws EOFException Thrown on end of file.
     *
     * @see com.sun.org.apache.xerces.internal.util.SymbolTable
     * @see com.sun.org.apache.xerces.internal.util.XMLChar#isName
     * @see com.sun.org.apache.xerces.internal.util.XMLChar#isNameStart
     */
    public abstract String scanName() throws IOException;

    Scans a qualified name from the input, setting the fields of the
QName structure appropriately.

Note: The qualified name characters are consumed.

Note: The strings used to set the values of the
QName structure must be symbols. The SymbolTable can be used for
this purpose.
Params: qname – The qualified name structure to fill.
Throws: IOException –  Thrown if i/o error occurs.
EOFException – Thrown on end of file.
See Also: SymbolTable
XMLChar.isName
XMLChar.isNameStart
Returns: Returns true if a qualified name appeared immediately on
        the input and was scanned, false otherwise./**
     * Scans a qualified name from the input, setting the fields of the
     * QName structure appropriately.
     * <p>
     * <strong>Note:</strong> The qualified name characters are consumed.
     * <p>
     * <strong>Note:</strong> The strings used to set the values of the
     * QName structure must be symbols. The SymbolTable can be used for
     * this purpose.
     *
     * @param qname The qualified name structure to fill.
     *
     * @return Returns true if a qualified name appeared immediately on
     *         the input and was scanned, false otherwise.
     *
     * @throws IOException  Thrown if i/o error occurs.
     * @throws EOFException Thrown on end of file.
     *
     * @see com.sun.org.apache.xerces.internal.util.SymbolTable
     * @see com.sun.org.apache.xerces.internal.util.XMLChar#isName
     * @see com.sun.org.apache.xerces.internal.util.XMLChar#isNameStart
     */
    public abstract boolean scanQName(QName qname) throws IOException;

    CHANGED:
Scans a range of parsed character data, This function appends the character data to
the supplied buffer.

Note: The characters are consumed.

Note: This method does not guarantee to return
the longest run of parsed character data. This method may return
before markup due to reaching the end of the input buffer or any
other reason.

Params: content – The content structure to fill.
Throws: IOException –  Thrown if i/o error occurs.
EOFException – Thrown on end of file.
Returns: Returns the next character on the input, if known. This
        value may be -1 but this does note designate
        end of file./**
     * CHANGED:
     * Scans a range of parsed character data, This function appends the character data to
     * the supplied buffer.
     * <p>
     * <strong>Note:</strong> The characters are consumed.
     * <p>
     * <strong>Note:</strong> This method does not guarantee to return
     * the longest run of parsed character data. This method may return
     * before markup due to reaching the end of the input buffer or any
     * other reason.
     * <p>
     *
     * @param content The content structure to fill.
     *
     * @return Returns the next character on the input, if known. This
     *         value may be -1 but this does <em>note</em> designate
     *         end of file.
     *
     * @throws IOException  Thrown if i/o error occurs.
     * @throws EOFException Thrown on end of file.
     */
    public abstract int scanContent(XMLString content) throws IOException;

    Scans a range of attribute value data, setting the fields of the
XMLString structure, appropriately.

Note: The characters are consumed.

Note: This method does not guarantee to return
the longest run of attribute value data. This method may return
before the quote character due to reaching the end of the input
buffer or any other reason.

Note: The fields contained in the XMLString
structure are not guaranteed to remain valid upon subsequent calls
to the entity scanner. Therefore, the caller is responsible for
immediately using the returned character data or making a copy of
the character data.
Params: quote –   The quote character that signifies the end of the
               attribute value data.
content – The content structure to fill.
Throws: IOException –  Thrown if i/o error occurs.
EOFException – Thrown on end of file.
Returns: Returns the next character on the input, if known. This
        value may be -1 but this does note designate
        end of file./**
     * Scans a range of attribute value data, setting the fields of the
     * XMLString structure, appropriately.
     * <p>
     * <strong>Note:</strong> The characters are consumed.
     * <p>
     * <strong>Note:</strong> This method does not guarantee to return
     * the longest run of attribute value data. This method may return
     * before the quote character due to reaching the end of the input
     * buffer or any other reason.
     * <p>
     * <strong>Note:</strong> The fields contained in the XMLString
     * structure are not guaranteed to remain valid upon subsequent calls
     * to the entity scanner. Therefore, the caller is responsible for
     * immediately using the returned character data or making a copy of
     * the character data.
     *
     * @param quote   The quote character that signifies the end of the
     *                attribute value data.
     * @param content The content structure to fill.
     *
     * @return Returns the next character on the input, if known. This
     *         value may be -1 but this does <em>note</em> designate
     *         end of file.
     *
     * @throws IOException  Thrown if i/o error occurs.
     * @throws EOFException Thrown on end of file.
     */
    public abstract int scanLiteral(int quote, XMLString content)
    throws IOException;

    Scans a range of character data up to the specicied delimiter,
setting the fields of the XMLString structure, appropriately.

Note: The characters are consumed.

Note: This assumes that the internal buffer is
at least the same size, or bigger, than the length of the delimiter
and that the delimiter contains at least one character.

Note: This method does not guarantee to return
the longest run of character data. This method may return before
the delimiter due to reaching the end of the input buffer or any
other reason.

Note: The fields contained in the XMLString
structure are not guaranteed to remain valid upon subsequent calls
to the entity scanner. Therefore, the caller is responsible for
immediately using the returned character data or making a copy of
the character data.
Params: delimiter – The string that signifies the end of the character
                 data to be scanned.
data –      The data structure to fill.
Throws: IOException –  Thrown if i/o error occurs.
EOFException – Thrown on end of file.
Returns: Returns true if there is more data to scan, false otherwise./**
     * Scans a range of character data up to the specicied delimiter,
     * setting the fields of the XMLString structure, appropriately.
     * <p>
     * <strong>Note:</strong> The characters are consumed.
     * <p>
     * <strong>Note:</strong> This assumes that the internal buffer is
     * at least the same size, or bigger, than the length of the delimiter
     * and that the delimiter contains at least one character.
     * <p>
     * <strong>Note:</strong> This method does not guarantee to return
     * the longest run of character data. This method may return before
     * the delimiter due to reaching the end of the input buffer or any
     * other reason.
     * <p>
     * <strong>Note:</strong> The fields contained in the XMLString
     * structure are not guaranteed to remain valid upon subsequent calls
     * to the entity scanner. Therefore, the caller is responsible for
     * immediately using the returned character data or making a copy of
     * the character data.
     *
     * @param delimiter The string that signifies the end of the character
     *                  data to be scanned.
     * @param data      The data structure to fill.
     *
     * @return Returns true if there is more data to scan, false otherwise.
     *
     * @throws IOException  Thrown if i/o error occurs.
     * @throws EOFException Thrown on end of file.
     */
    public abstract boolean scanData(String delimiter, XMLStringBuffer data)
    throws IOException;

    Skips a character appearing immediately on the input.

Note: The character is consumed only if it matches
the specified character.
Params: c – The character to skip.
Throws: IOException –  Thrown if i/o error occurs.
EOFException – Thrown on end of file.
Returns: Returns true if the character was skipped./**
     * Skips a character appearing immediately on the input.
     * <p>
     * <strong>Note:</strong> The character is consumed only if it matches
     * the specified character.
     *
     * @param c The character to skip.
     *
     * @return Returns true if the character was skipped.
     *
     * @throws IOException  Thrown if i/o error occurs.
     * @throws EOFException Thrown on end of file.
     */
    public abstract boolean skipChar(int c) throws IOException;

    Skips space characters appearing immediately on the input.

Note: The characters are consumed only if they are
space characters.
Throws: IOException –  Thrown if i/o error occurs.
EOFException – Thrown on end of file.
See Also: XMLChar.isSpace
Returns: Returns true if at least one space character was skipped./**
     * Skips space characters appearing immediately on the input.
     * <p>
     * <strong>Note:</strong> The characters are consumed only if they are
     * space characters.
     *
     * @return Returns true if at least one space character was skipped.
     *
     * @throws IOException  Thrown if i/o error occurs.
     * @throws EOFException Thrown on end of file.
     *
     * @see com.sun.org.apache.xerces.internal.util.XMLChar#isSpace
     */
    public abstract boolean skipSpaces() throws IOException;

    Skips the specified string appearing immediately on the input.

Note: The characters are consumed only if they are
space characters.
Params: s – The string to skip.
Throws: IOException –  Thrown if i/o error occurs.
EOFException – Thrown on end of file.
Returns: Returns true if the string was skipped./**
     * Skips the specified string appearing immediately on the input.
     * <p>
     * <strong>Note:</strong> The characters are consumed only if they are
     * space characters.
     *
     * @param s The string to skip.
     *
     * @return Returns true if the string was skipped.
     *
     * @throws IOException  Thrown if i/o error occurs.
     * @throws EOFException Thrown on end of file.
     */
    public abstract boolean skipString(String s) throws IOException;

    public abstract void registerListener(XMLBufferListener listener);

} // class XMLEntityScanner

Author:	Andy Clark, IBM, Neeraj Bajaj Sun Microsystems, K.Venugopal Sun Microsystems
See Also:	XMLEntityHandler XMLEntityManager

Params:	encoding – The IANA encoding name of the new encoding.
Throws:	IOException – Thrown if the new encoding is not supported.
See Also:	EncodingMap XMLChar.isValidIANAEncoding XMLChar.isValidJavaEncoding

Throws:	IOException – Thrown if i/o error occurs. EOFException – Thrown on end of file.
See Also:	SymbolTable XMLChar.isName

Params:	qname – The qualified name structure to fill.
Throws:	IOException – Thrown if i/o error occurs. EOFException – Thrown on end of file.
See Also:	SymbolTable XMLChar.isName XMLChar.isNameStart
Returns:	Returns true if a qualified name appeared immediately on the input and was scanned, false otherwise.

Params:	content – The content structure to fill.
Throws:	IOException – Thrown if i/o error occurs. EOFException – Thrown on end of file.
Returns:	Returns the next character on the input, if known. This value may be -1 but this does note designate end of file.

Params:	quote – The quote character that signifies the end of the attribute value data. content – The content structure to fill.
Throws:	IOException – Thrown if i/o error occurs. EOFException – Thrown on end of file.
Returns:	Returns the next character on the input, if known. This value may be -1 but this does note designate end of file.

Params:	delimiter – The string that signifies the end of the character data to be scanned. data – The data structure to fill.
Throws:	IOException – Thrown if i/o error occurs. EOFException – Thrown on end of file.
Returns:	Returns true if there is more data to scan, false otherwise.

Params:	c – The character to skip.
Throws:	IOException – Thrown if i/o error occurs. EOFException – Thrown on end of file.
Returns:	Returns true if the character was skipped.

Params:	s – The string to skip.
Throws:	IOException – Thrown if i/o error occurs. EOFException – Thrown on end of file.
Returns:	Returns true if the string was skipped.

/

java/ 12/ java.xml/com/sun/xml/internal/stream/XMLEntityReader.java