http://xml.apache.org/commons/components/external/: xml-commons provides an Apache-hosted set of DOM, SAX, and JAXP interfaces for use in other xml-based projects. Our hope is that we can standardize on both a common version and packaging scheme for these critical XML standards interfaces to make the lives of both our developers and users easier. The External Components portion of xml-commons contains interfaces that are defined by external standards organizations. For DOM, that's the W3C; for SAX it's David Megginson and sax.sourceforge.net; for JAXP it's Sun. 
// SAX Attribute List Interface.
// http://www.saxproject.org
// No warranty; no copyright -- use this as you will.
// $Id: AttributeList.java 226184 2005-04-08 10:53:24Z neeraj $

package org.xml.sax;


Interface for an element's attribute specifications.


This module, both source code and documentation, is in the
Public Domain, and comes with NO WARRANTY.
See http://www.saxproject.org
for further information.



This is the original SAX1 interface for reporting an element's attributes. Unlike the new Attributes interface, it does not support Namespace-related information.


When an attribute list is supplied as part of a startElement event, the list will return valid results only during the scope of the event; once the event handler returns control to the parser, the attribute list is invalid. To save a persistent copy of the attribute list, use the SAX1 AttributeListImpl helper class.


An attribute list includes only attributes that have been
specified or defaulted: #IMPLIED attributes will not be included.


There are two ways for the SAX application to obtain information
from the AttributeList.  First, it can iterate through the entire
list:


public void startElement (String name, AttributeList atts) {
  for (int i = 0; i < atts.getLength(); i++) {
    String name = atts.getName(i);
    String type = atts.getType(i);
    String value = atts.getValue(i);
    [...]
  }
}



(Note that the result of getLength() will be zero if there
are no attributes.)

As an alternative, the application can request the value or
type of specific attributes:


public void startElement (String name, AttributeList atts) {
  String identifier = atts.getValue("id");
  String label = atts.getValue("label");
  [...]
}



Author:David Megginson
See Also:
Deprecated:This interface has been replaced by the SAX2 Attributes interface, which includes Namespace support.
Since:SAX 1.0
Version:2.0.1 (sax2r2)
/**
 * Interface for an element's attribute specifications.
 *
 * <blockquote>
 * <em>This module, both source code and documentation, is in the
 * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
 * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
 * for further information.
 * </blockquote>
 *
 * <p>This is the original SAX1 interface for reporting an element's
 * attributes.  Unlike the new {@link org.xml.sax.Attributes Attributes}
 * interface, it does not support Namespace-related information.</p>
 *
 * <p>When an attribute list is supplied as part of a
 * {@link org.xml.sax.DocumentHandler#startElement startElement}
 * event, the list will return valid results only during the
 * scope of the event; once the event handler returns control
 * to the parser, the attribute list is invalid.  To save a
 * persistent copy of the attribute list, use the SAX1
 * {@link org.xml.sax.helpers.AttributeListImpl AttributeListImpl}
 * helper class.</p>
 *
 * <p>An attribute list includes only attributes that have been
 * specified or defaulted: #IMPLIED attributes will not be included.</p>
 *
 * <p>There are two ways for the SAX application to obtain information
 * from the AttributeList.  First, it can iterate through the entire
 * list:</p>
 *
 * <pre>
 * public void startElement (String name, AttributeList atts) {
 *   for (int i = 0; i < atts.getLength(); i++) {
 *     String name = atts.getName(i);
 *     String type = atts.getType(i);
 *     String value = atts.getValue(i);
 *     [...]
 *   }
 * }
 * </pre>
 *
 * <p>(Note that the result of getLength() will be zero if there
 * are no attributes.)
 *
 * <p>As an alternative, the application can request the value or
 * type of specific attributes:</p>
 *
 * <pre>
 * public void startElement (String name, AttributeList atts) {
 *   String identifier = atts.getValue("id");
 *   String label = atts.getValue("label");
 *   [...]
 * }
 * </pre>
 *
 * @deprecated This interface has been replaced by the SAX2
 *             {@link org.xml.sax.Attributes Attributes}
 *             interface, which includes Namespace support.
 * @since SAX 1.0
 * @author David Megginson
 * @version 2.0.1 (sax2r2)
 * @see org.xml.sax.DocumentHandler#startElement startElement
 * @see org.xml.sax.helpers.AttributeListImpl AttributeListImpl
 */
public interface AttributeList {


    ////////////////////////////////////////////////////////////////////
    // Iteration methods.
    ////////////////////////////////////////////////////////////////////
    

    
Return the number of attributes in this list.

The SAX parser may provide attributes in any
arbitrary order, regardless of the order in which they were
declared or specified.  The number of attributes may be
zero.


Returns:The number of attributes in the list.
/**
     * Return the number of attributes in this list.
     *
     * <p>The SAX parser may provide attributes in any
     * arbitrary order, regardless of the order in which they were
     * declared or specified.  The number of attributes may be
     * zero.</p>
     *
     * @return The number of attributes in the list.  
     */
    public abstract int getLength ();
    
    
    
Return the name of an attribute in this list (by position).

The names must be unique: the SAX parser shall not include the
same attribute twice.  Attributes without values (those declared
#IMPLIED without a value specified in the start tag) will be
omitted from the list.


If the attribute name has a namespace prefix, the prefix
will still be attached.


Params:
  • i – The index of the attribute in the list (starting at 0).
See Also:
Returns:The name of the indexed attribute, or null
        if the index is out of range.
/**
     * Return the name of an attribute in this list (by position).
     *
     * <p>The names must be unique: the SAX parser shall not include the
     * same attribute twice.  Attributes without values (those declared
     * #IMPLIED without a value specified in the start tag) will be
     * omitted from the list.</p>
     *
     * <p>If the attribute name has a namespace prefix, the prefix
     * will still be attached.</p>
     *
     * @param i The index of the attribute in the list (starting at 0).
     * @return The name of the indexed attribute, or null
     *         if the index is out of range.
     * @see #getLength 
     */
    public abstract String getName (int i);
    
    
    
Return the type of an attribute in the list (by position).

The attribute type is one of the strings "CDATA", "ID",
"IDREF", "IDREFS", "NMTOKEN", "NMTOKENS", "ENTITY", "ENTITIES",
or "NOTATION" (always in upper case).


If the parser has not read a declaration for the attribute,
or if the parser does not report attribute types, then it must
return the value "CDATA" as stated in the XML 1.0 Recommentation
(clause 3.3.3, "Attribute-Value Normalization").


For an enumerated attribute that is not a notation, the
parser will report the type as "NMTOKEN".


Params:
  • i – The index of the attribute in the list (starting at 0).
See Also:
Returns:The attribute type as a string, or
        null if the index is out of range.
/**
     * Return the type of an attribute in the list (by position).
     *
     * <p>The attribute type is one of the strings "CDATA", "ID",
     * "IDREF", "IDREFS", "NMTOKEN", "NMTOKENS", "ENTITY", "ENTITIES",
     * or "NOTATION" (always in upper case).</p>
     *
     * <p>If the parser has not read a declaration for the attribute,
     * or if the parser does not report attribute types, then it must
     * return the value "CDATA" as stated in the XML 1.0 Recommentation
     * (clause 3.3.3, "Attribute-Value Normalization").</p>
     *
     * <p>For an enumerated attribute that is not a notation, the
     * parser will report the type as "NMTOKEN".</p>
     *
     * @param i The index of the attribute in the list (starting at 0).
     * @return The attribute type as a string, or
     *         null if the index is out of range.
     * @see #getLength 
     * @see #getType(java.lang.String)
     */
    public abstract String getType (int i);
    
    
    
Return the value of an attribute in the list (by position).

If the attribute value is a list of tokens (IDREFS,
ENTITIES, or NMTOKENS), the tokens will be concatenated
into a single string separated by whitespace.


Params:
  • i – The index of the attribute in the list (starting at 0).
See Also:
Returns:The attribute value as a string, or
        null if the index is out of range.
/**
     * Return the value of an attribute in the list (by position).
     *
     * <p>If the attribute value is a list of tokens (IDREFS,
     * ENTITIES, or NMTOKENS), the tokens will be concatenated
     * into a single string separated by whitespace.</p>
     *
     * @param i The index of the attribute in the list (starting at 0).
     * @return The attribute value as a string, or
     *         null if the index is out of range.
     * @see #getLength
     * @see #getValue(java.lang.String)
     */
    public abstract String getValue (int i);



    ////////////////////////////////////////////////////////////////////
    // Lookup methods.
    ////////////////////////////////////////////////////////////////////
    
    
    
Return the type of an attribute in the list (by name).

The return value is the same as the return value for
getType(int).


If the attribute name has a namespace prefix in the document,
the application must include the prefix here.


Params:
  • name – The name of the attribute.
See Also:
Returns:The attribute type as a string, or null if no
        such attribute exists.
/**
     * Return the type of an attribute in the list (by name).
     *
     * <p>The return value is the same as the return value for
     * getType(int).</p>
     *
     * <p>If the attribute name has a namespace prefix in the document,
     * the application must include the prefix here.</p>
     *
     * @param name The name of the attribute.
     * @return The attribute type as a string, or null if no
     *         such attribute exists.
     * @see #getType(int)
     */
    public abstract String getType (String name);
    
    
    
Return the value of an attribute in the list (by name).

The return value is the same as the return value for
getValue(int).


If the attribute name has a namespace prefix in the document,
the application must include the prefix here.


Params:
  • name – the name of the attribute to return
See Also:
Returns:The attribute value as a string, or null if
        no such attribute exists.
/**
     * Return the value of an attribute in the list (by name).
     *
     * <p>The return value is the same as the return value for
     * getValue(int).</p>
     *
     * <p>If the attribute name has a namespace prefix in the document,
     * the application must include the prefix here.</p>
     *
     * @param name the name of the attribute to return
     * @return The attribute value as a string, or null if
     *         no such attribute exists.
     * @see #getValue(int)
     */
    public abstract String getValue (String name);
    
}

// end of AttributeList.java