org.xml.sax.ext.Attributes2Impl Maven / Gradle / Ivy
// 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 {@link 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 {@link #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
* {@link #setDeclared}.
* If you change an attribute's type by hand, you may need to modify
* its declared flag to match.
*
*
* @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.
*/
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
* {@link org.xml.sax.ContentHandler#startElement startElement} event.
*
* @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.
*/
// 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.
*/
// 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.
*/
// 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.
*
* @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.
*
* @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.
*
* @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 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 {@link #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 {@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.
*
* @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.
*
* @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;
}
}