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. 
// Attributes2Impl.java - extended AttributesImpl
// http://www.saxproject.org
// Public Domain: no warranty.
// $Id: Attributes2Impl.java 226184 2005-04-08 10:53:24Z neeraj $

package org.xml.sax.ext;

import org.xml.sax.Attributes;
import org.xml.sax.helpers.AttributesImpl;



SAX2 extension helper for additional Attributes information, implementing the Attributes2 interface. 

This module, both source code and documentation, is in the
Public Domain, and comes with NO WARRANTY.



This is not part of core-only SAX2 distributions.


The specified flag for each attribute will always be true, unless it has been set to false in the copy constructor or using setSpecified. Similarly, the declared flag for each attribute will
always be false, except for defaulted attributes (specified is false), non-CDATA attributes, or when it is set to true using setDeclared. If you change an attribute's type by hand, you may need to modify its declared flag to match. 



Author:David Brownell
Since:SAX 2.0 (extensions 1.1 alpha)
Version:TBS
/**
 * SAX2 extension helper for additional Attributes information,
 * implementing the {@link Attributes2} interface.
 *
 * <blockquote>
 * <em>This module, both source code and documentation, is in the
 * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
 * </blockquote>
 *
 * <p>This is not part of core-only SAX2 distributions.</p>
 *
 * <p>The <em>specified</em> flag for each attribute will always
 * be true, unless it has been set to false in the copy constructor
 * or using {@link #setSpecified}.
 * Similarly, the <em>declared</em> flag for each attribute will
 * always be false, except for defaulted attributes (<em>specified</em>
 * is false), non-CDATA attributes, or when it is set to true using
 * {@link #setDeclared}.
 * If you change an attribute's type by hand, you may need to modify
 * its <em>declared</em> flag to match. 
 * </p>
 *
 * @since SAX 2.0 (extensions 1.1 alpha)
 * @author David Brownell
 * @version TBS
 */
public class Attributes2Impl extends AttributesImpl implements Attributes2
{
    private boolean	declared [];
    private boolean	specified [];


    
Construct a new, empty Attributes2Impl object.

/**
     * Construct a new, empty Attributes2Impl object.
     */
    public Attributes2Impl () { }


    
Copy an existing Attributes or Attributes2 object.
If the object implements Attributes2, values of the
specified and declared flags for each
attribute are copied.
Otherwise the flag values are defaulted to assume no DTD was used,
unless there is evidence to the contrary (such as attributes with
type other than CDATA, which must have been declared).

This constructor is especially useful inside a startElement event.


Params:
  • atts – The existing Attributes object.
/**
     * Copy an existing Attributes or Attributes2 object.
     * If the object implements Attributes2, values of the
     * <em>specified</em> and <em>declared</em> flags for each
     * attribute are copied.
     * Otherwise the flag values are defaulted to assume no DTD was used,
     * unless there is evidence to the contrary (such as attributes with
     * type other than CDATA, which must have been <em>declared</em>).
     *
     * <p>This constructor is especially useful inside a
     * {@link org.xml.sax.ContentHandler#startElement startElement} event.</p>
     *
     * @param atts The existing Attributes object.
     */
    public Attributes2Impl (Attributes atts)
    {
	super (atts);
    }


    ////////////////////////////////////////////////////////////////////
    // Implementation of Attributes2
    ////////////////////////////////////////////////////////////////////


    
Returns the current value of the attribute's "declared" flag.

/**
     * Returns the current value of the attribute's "declared" flag.
     */
    // javadoc mostly from interface
    public boolean isDeclared (int index)
    {
	if (index < 0 || index >= getLength ())
	    throw new ArrayIndexOutOfBoundsException (
		"No attribute at index: " + index);
	return declared [index];
    }


    
Returns the current value of the attribute's "declared" flag.

/**
     * Returns the current value of the attribute's "declared" flag.
     */
    // javadoc mostly from interface
    public boolean isDeclared (String uri, String localName)
    {
	int index = getIndex (uri, localName);

	if (index < 0)
	    throw new IllegalArgumentException (
		"No such attribute: local=" + localName
		+ ", namespace=" + uri);
	return declared [index];
    }


    
Returns the current value of the attribute's "declared" flag.

/**
     * Returns the current value of the attribute's "declared" flag.
     */
    // javadoc mostly from interface
    public boolean isDeclared (String qName)
    {
	int index = getIndex (qName);

	if (index < 0)
	    throw new IllegalArgumentException (
		"No such attribute: " + qName);
	return declared [index];
    }


    
Returns the current value of an attribute's "specified" flag.

Params:
  • index – The attribute index (zero-based).
Throws:
Returns:current flag value
/**
     * Returns the current value of an attribute's "specified" flag.
     *
     * @param index The attribute index (zero-based).
     * @return current flag value
     * @exception java.lang.ArrayIndexOutOfBoundsException When the
     *            supplied index does not identify an attribute.
     */
    public boolean isSpecified (int index)
    {
	if (index < 0 || index >= getLength ())
	    throw new ArrayIndexOutOfBoundsException (
		"No attribute at index: " + index);
	return specified [index];
    }


    
Returns the current value of an attribute's "specified" flag.

Params:
  • uri – The Namespace URI, or the empty string if
       the name has no Namespace URI.
  • localName – The attribute's local name.
Throws:
Returns:current flag value
/**
     * Returns the current value of an attribute's "specified" flag.
     *
     * @param uri The Namespace URI, or the empty string if
     *        the name has no Namespace URI.
     * @param localName The attribute's local name.
     * @return current flag value
     * @exception java.lang.IllegalArgumentException When the
     *            supplied names do not identify an attribute.
     */
    public boolean isSpecified (String uri, String localName)
    {
	int index = getIndex (uri, localName);

	if (index < 0)
	    throw new IllegalArgumentException (
		"No such attribute: local=" + localName
		+ ", namespace=" + uri);
	return specified [index];
    }


    
Returns the current value of an attribute's "specified" flag.

Params:
  • qName – The XML qualified (prefixed) name.
Throws:
Returns:current flag value
/**
     * Returns the current value of an attribute's "specified" flag.
     *
     * @param qName The XML qualified (prefixed) name.
     * @return current flag value
     * @exception java.lang.IllegalArgumentException When the
     *            supplied name does not identify an attribute.
     */
    public boolean isSpecified (String qName)
    {
	int index = getIndex (qName);

	if (index < 0)
	    throw new IllegalArgumentException (
		"No such attribute: " + qName);
	return specified [index];
    }


    ////////////////////////////////////////////////////////////////////
    // Manipulators
    ////////////////////////////////////////////////////////////////////


    
Copy an entire Attributes object.  The "specified" flags are
assigned as true, and "declared" flags as false (except when
an attribute's type is not CDATA),
unless the object is an Attributes2 object.
In that case those flag values are all copied.

See Also:
  • setAttributes.setAttributes
/**
     * Copy an entire Attributes object.  The "specified" flags are
     * assigned as true, and "declared" flags as false (except when
     * an attribute's type is not CDATA),
     * unless the object is an Attributes2 object.
     * In that case those flag values are all copied.
     *
     * @see AttributesImpl#setAttributes
     */
    public void setAttributes (Attributes atts)
    {
	int length = atts.getLength ();

	super.setAttributes (atts);
	declared = new boolean [length];
	specified = new boolean [length];

	if (atts instanceof Attributes2) {
	    Attributes2	a2 = (Attributes2) atts;
	    for (int i = 0; i < length; i++) {
		declared [i] = a2.isDeclared (i);
		specified [i] = a2.isSpecified (i);
	    }
	} else {
	    for (int i = 0; i < length; i++) {
		declared [i] = !"CDATA".equals (atts.getType (i));
		specified [i] = true;
	    }
	}
    }


    
Add an attribute to the end of the list, setting its "specified" flag to true. To set that flag's value to false, use setSpecified. 
Unless the attribute type is CDATA, this attribute is marked as being declared in the DTD. To set that flag's value to true for CDATA attributes, use setDeclared. 
See Also:
/**
     * Add an attribute to the end of the list, setting its
     * "specified" flag to true.  To set that flag's value
     * to false, use {@link #setSpecified}.
     *
     * <p>Unless the attribute <em>type</em> is CDATA, this attribute
     * is marked as being declared in the DTD.  To set that flag's value
     * to true for CDATA attributes, use {@link #setDeclared}.
     *
     * @see AttributesImpl#addAttribute
     */
    public void addAttribute (String uri, String localName, String qName,
			      String type, String value)
    {
	super.addAttribute (uri, localName, qName, type, value);

	int length = getLength ();

	if (length < specified.length) {
	    boolean	newFlags [];

	    newFlags = new boolean [length];
	    System.arraycopy (declared, 0, newFlags, 0, declared.length);
	    declared = newFlags;

	    newFlags = new boolean [length];
	    System.arraycopy (specified, 0, newFlags, 0, specified.length);
	    specified = newFlags;
	}

	specified [length - 1] = true;
	declared [length - 1] = !"CDATA".equals (type);
    }


    // javadoc entirely from superclass
    public void removeAttribute (int index)
    {
	int origMax = getLength () - 1;

	super.removeAttribute (index);
	if (index != origMax) {
	    System.arraycopy (declared, index + 1, declared, index,
		    origMax - index);
	    System.arraycopy (specified, index + 1, specified, index,
		    origMax - index);
	}
    }


    
Assign a value to the "declared" flag of a specific attribute.
This is normally needed only for attributes of type CDATA,
including attributes whose type is changed to or from CDATA.

Params:
  • index – The index of the attribute (zero-based).
  • value – The desired flag value.
Throws:
See Also:
/**
     * Assign a value to the "declared" flag of a specific attribute.
     * This is normally needed only for attributes of type CDATA,
     * including attributes whose type is changed to or from CDATA.
     *
     * @param index The index of the attribute (zero-based).
     * @param value The desired flag value.
     * @exception java.lang.ArrayIndexOutOfBoundsException When the
     *            supplied index does not identify an attribute.
     * @see #setType
     */
    public void setDeclared (int index, boolean value)
    {
	if (index < 0 || index >= getLength ())
	    throw new ArrayIndexOutOfBoundsException (
		"No attribute at index: " + index);
	declared [index] = value;
    }


    
Assign a value to the "specified" flag of a specific attribute.
This is the only way this flag can be cleared, except clearing
by initialization with the copy constructor.

Params:
  • index – The index of the attribute (zero-based).
  • value – The desired flag value.
Throws:
/**
     * Assign a value to the "specified" flag of a specific attribute.
     * This is the only way this flag can be cleared, except clearing
     * by initialization with the copy constructor.
     *
     * @param index The index of the attribute (zero-based).
     * @param value The desired flag value.
     * @exception java.lang.ArrayIndexOutOfBoundsException When the
     *            supplied index does not identify an attribute.
     */
    public void setSpecified (int index, boolean value)
    {
	if (index < 0 || index >= getLength ())
	    throw new ArrayIndexOutOfBoundsException (
		"No attribute at index: " + index);
	specified [index] = value;
    }
}