7a163ec05c
2002-12-19 Anthony Green <green@redhat.com> * Makefile.am (ordinary_java_source_files): Add org/xml/sax/helpers/NewInstance.java. * Makefile.in: Rebuilt. * org/xml/sax/package.html, org/xml/sax/ext/package.html, org/xml/sax/helpers/package.html: New files. * org/xml/sax/*: Upgrade to SAX 2.0.1 release from http://www.saxproject.org. From-SVN: r60350
621 lines
17 KiB
Java
621 lines
17 KiB
Java
// AttributesImpl.java - default implementation of Attributes.
|
||
// http://www.saxproject.org
|
||
// Written by David Megginson
|
||
// NO WARRANTY! This class is in the public domain.
|
||
|
||
// $Id: AttributesImpl.java,v 1.6.2.3 2002/01/29 21:34:14 dbrownell Exp $
|
||
|
||
|
||
package org.xml.sax.helpers;
|
||
|
||
import org.xml.sax.Attributes;
|
||
|
||
|
||
/**
|
||
* Default implementation of the Attributes interface.
|
||
*
|
||
* <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 class provides a default implementation of the SAX2
|
||
* {@link org.xml.sax.Attributes Attributes} interface, with the
|
||
* addition of manipulators so that the list can be modified or
|
||
* reused.</p>
|
||
*
|
||
* <p>There are two typical uses of this class:</p>
|
||
*
|
||
* <ol>
|
||
* <li>to take a persistent snapshot of an Attributes object
|
||
* in a {@link org.xml.sax.ContentHandler#startElement startElement} event; or</li>
|
||
* <li>to construct or modify an Attributes object in a SAX2 driver or filter.</li>
|
||
* </ol>
|
||
*
|
||
* <p>This class replaces the now-deprecated SAX1 {@link
|
||
* org.xml.sax.helpers.AttributeListImpl AttributeListImpl}
|
||
* class; in addition to supporting the updated Attributes
|
||
* interface rather than the deprecated {@link org.xml.sax.AttributeList
|
||
* AttributeList} interface, it also includes a much more efficient
|
||
* implementation using a single array rather than a set of Vectors.</p>
|
||
*
|
||
* @since SAX 2.0
|
||
* @author David Megginson
|
||
* @version 2.0.1 (sax2r2)
|
||
*/
|
||
public class AttributesImpl implements Attributes
|
||
{
|
||
|
||
|
||
////////////////////////////////////////////////////////////////////
|
||
// Constructors.
|
||
////////////////////////////////////////////////////////////////////
|
||
|
||
|
||
/**
|
||
* Construct a new, empty AttributesImpl object.
|
||
*/
|
||
public AttributesImpl ()
|
||
{
|
||
length = 0;
|
||
data = null;
|
||
}
|
||
|
||
|
||
/**
|
||
* Copy an existing Attributes object.
|
||
*
|
||
* <p>This constructor is especially useful inside a
|
||
* {@link org.xml.sax.ContentHandler#startElement startElement} event.</p>
|
||
*
|
||
* @param atts The existing Attributes object.
|
||
*/
|
||
public AttributesImpl (Attributes atts)
|
||
{
|
||
setAttributes(atts);
|
||
}
|
||
|
||
|
||
|
||
////////////////////////////////////////////////////////////////////
|
||
// Implementation of org.xml.sax.Attributes.
|
||
////////////////////////////////////////////////////////////////////
|
||
|
||
|
||
/**
|
||
* Return the number of attributes in the list.
|
||
*
|
||
* @return The number of attributes in the list.
|
||
* @see org.xml.sax.Attributes#getLength
|
||
*/
|
||
public int getLength ()
|
||
{
|
||
return length;
|
||
}
|
||
|
||
|
||
/**
|
||
* Return an attribute's Namespace URI.
|
||
*
|
||
* @param index The attribute's index (zero-based).
|
||
* @return The Namespace URI, the empty string if none is
|
||
* available, or null if the index is out of range.
|
||
* @see org.xml.sax.Attributes#getURI
|
||
*/
|
||
public String getURI (int index)
|
||
{
|
||
if (index >= 0 && index < length) {
|
||
return data[index*5];
|
||
} else {
|
||
return null;
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* Return an attribute's local name.
|
||
*
|
||
* @param index The attribute's index (zero-based).
|
||
* @return The attribute's local name, the empty string if
|
||
* none is available, or null if the index if out of range.
|
||
* @see org.xml.sax.Attributes#getLocalName
|
||
*/
|
||
public String getLocalName (int index)
|
||
{
|
||
if (index >= 0 && index < length) {
|
||
return data[index*5+1];
|
||
} else {
|
||
return null;
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* Return an attribute's qualified (prefixed) name.
|
||
*
|
||
* @param index The attribute's index (zero-based).
|
||
* @return The attribute's qualified name, the empty string if
|
||
* none is available, or null if the index is out of bounds.
|
||
* @see org.xml.sax.Attributes#getQName
|
||
*/
|
||
public String getQName (int index)
|
||
{
|
||
if (index >= 0 && index < length) {
|
||
return data[index*5+2];
|
||
} else {
|
||
return null;
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* Return an attribute's type by index.
|
||
*
|
||
* @param index The attribute's index (zero-based).
|
||
* @return The attribute's type, "CDATA" if the type is unknown, or null
|
||
* if the index is out of bounds.
|
||
* @see org.xml.sax.Attributes#getType(int)
|
||
*/
|
||
public String getType (int index)
|
||
{
|
||
if (index >= 0 && index < length) {
|
||
return data[index*5+3];
|
||
} else {
|
||
return null;
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* Return an attribute's value by index.
|
||
*
|
||
* @param index The attribute's index (zero-based).
|
||
* @return The attribute's value or null if the index is out of bounds.
|
||
* @see org.xml.sax.Attributes#getValue(int)
|
||
*/
|
||
public String getValue (int index)
|
||
{
|
||
if (index >= 0 && index < length) {
|
||
return data[index*5+4];
|
||
} else {
|
||
return null;
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* Look up an attribute's index by Namespace name.
|
||
*
|
||
* <p>In many cases, it will be more efficient to look up the name once and
|
||
* use the index query methods rather than using the name query methods
|
||
* repeatedly.</p>
|
||
*
|
||
* @param uri The attribute's Namespace URI, or the empty
|
||
* string if none is available.
|
||
* @param localName The attribute's local name.
|
||
* @return The attribute's index, or -1 if none matches.
|
||
* @see org.xml.sax.Attributes#getIndex(java.lang.String,java.lang.String)
|
||
*/
|
||
public int getIndex (String uri, String localName)
|
||
{
|
||
int max = length * 5;
|
||
for (int i = 0; i < max; i += 5) {
|
||
if (data[i].equals(uri) && data[i+1].equals(localName)) {
|
||
return i / 5;
|
||
}
|
||
}
|
||
return -1;
|
||
}
|
||
|
||
|
||
/**
|
||
* Look up an attribute's index by qualified (prefixed) name.
|
||
*
|
||
* @param qName The qualified name.
|
||
* @return The attribute's index, or -1 if none matches.
|
||
* @see org.xml.sax.Attributes#getIndex(java.lang.String)
|
||
*/
|
||
public int getIndex (String qName)
|
||
{
|
||
int max = length * 5;
|
||
for (int i = 0; i < max; i += 5) {
|
||
if (data[i+2].equals(qName)) {
|
||
return i / 5;
|
||
}
|
||
}
|
||
return -1;
|
||
}
|
||
|
||
|
||
/**
|
||
* Look up an attribute's type by Namespace-qualified name.
|
||
*
|
||
* @param uri The Namespace URI, or the empty string for a name
|
||
* with no explicit Namespace URI.
|
||
* @param localName The local name.
|
||
* @return The attribute's type, or null if there is no
|
||
* matching attribute.
|
||
* @see org.xml.sax.Attributes#getType(java.lang.String,java.lang.String)
|
||
*/
|
||
public String getType (String uri, String localName)
|
||
{
|
||
int max = length * 5;
|
||
for (int i = 0; i < max; i += 5) {
|
||
if (data[i].equals(uri) && data[i+1].equals(localName)) {
|
||
return data[i+3];
|
||
}
|
||
}
|
||
return null;
|
||
}
|
||
|
||
|
||
/**
|
||
* Look up an attribute's type by qualified (prefixed) name.
|
||
*
|
||
* @param qName The qualified name.
|
||
* @return The attribute's type, or null if there is no
|
||
* matching attribute.
|
||
* @see org.xml.sax.Attributes#getType(java.lang.String)
|
||
*/
|
||
public String getType (String qName)
|
||
{
|
||
int max = length * 5;
|
||
for (int i = 0; i < max; i += 5) {
|
||
if (data[i+2].equals(qName)) {
|
||
return data[i+3];
|
||
}
|
||
}
|
||
return null;
|
||
}
|
||
|
||
|
||
/**
|
||
* Look up an attribute's value by Namespace-qualified name.
|
||
*
|
||
* @param uri The Namespace URI, or the empty string for a name
|
||
* with no explicit Namespace URI.
|
||
* @param localName The local name.
|
||
* @return The attribute's value, or null if there is no
|
||
* matching attribute.
|
||
* @see org.xml.sax.Attributes#getValue(java.lang.String,java.lang.String)
|
||
*/
|
||
public String getValue (String uri, String localName)
|
||
{
|
||
int max = length * 5;
|
||
for (int i = 0; i < max; i += 5) {
|
||
if (data[i].equals(uri) && data[i+1].equals(localName)) {
|
||
return data[i+4];
|
||
}
|
||
}
|
||
return null;
|
||
}
|
||
|
||
|
||
/**
|
||
* Look up an attribute's value by qualified (prefixed) name.
|
||
*
|
||
* @param qName The qualified name.
|
||
* @return The attribute's value, or null if there is no
|
||
* matching attribute.
|
||
* @see org.xml.sax.Attributes#getValue(java.lang.String)
|
||
*/
|
||
public String getValue (String qName)
|
||
{
|
||
int max = length * 5;
|
||
for (int i = 0; i < max; i += 5) {
|
||
if (data[i+2].equals(qName)) {
|
||
return data[i+4];
|
||
}
|
||
}
|
||
return null;
|
||
}
|
||
|
||
|
||
|
||
////////////////////////////////////////////////////////////////////
|
||
// Manipulators.
|
||
////////////////////////////////////////////////////////////////////
|
||
|
||
|
||
/**
|
||
* Clear the attribute list for reuse.
|
||
*
|
||
* <p>Note that little memory is freed by this call:
|
||
* the current array is kept so it can be
|
||
* reused.</p>
|
||
*/
|
||
public void clear ()
|
||
{
|
||
if (data != null) {
|
||
for (int i = 0; i < (length * 5); i++)
|
||
data [i] = null;
|
||
}
|
||
length = 0;
|
||
}
|
||
|
||
|
||
/**
|
||
* Copy an entire Attributes object.
|
||
*
|
||
* <p>It may be more efficient to reuse an existing object
|
||
* rather than constantly allocating new ones.</p>
|
||
*
|
||
* @param atts The attributes to copy.
|
||
*/
|
||
public void setAttributes (Attributes atts)
|
||
{
|
||
clear();
|
||
length = atts.getLength();
|
||
if (length > 0) {
|
||
data = new String[length*5];
|
||
for (int i = 0; i < length; i++) {
|
||
data[i*5] = atts.getURI(i);
|
||
data[i*5+1] = atts.getLocalName(i);
|
||
data[i*5+2] = atts.getQName(i);
|
||
data[i*5+3] = atts.getType(i);
|
||
data[i*5+4] = atts.getValue(i);
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* Add an attribute to the end of the list.
|
||
*
|
||
* <p>For the sake of speed, this method does no checking
|
||
* to see if the attribute is already in the list: that is
|
||
* the responsibility of the application.</p>
|
||
*
|
||
* @param uri The Namespace URI, or the empty string if
|
||
* none is available or Namespace processing is not
|
||
* being performed.
|
||
* @param localName The local name, or the empty string if
|
||
* Namespace processing is not being performed.
|
||
* @param qName The qualified (prefixed) name, or the empty string
|
||
* if qualified names are not available.
|
||
* @param type The attribute type as a string.
|
||
* @param value The attribute value.
|
||
*/
|
||
public void addAttribute (String uri, String localName, String qName,
|
||
String type, String value)
|
||
{
|
||
ensureCapacity(length+1);
|
||
data[length*5] = uri;
|
||
data[length*5+1] = localName;
|
||
data[length*5+2] = qName;
|
||
data[length*5+3] = type;
|
||
data[length*5+4] = value;
|
||
length++;
|
||
}
|
||
|
||
|
||
/**
|
||
* Set an attribute in the list.
|
||
*
|
||
* <p>For the sake of speed, this method does no checking
|
||
* for name conflicts or well-formedness: such checks are the
|
||
* responsibility of the application.</p>
|
||
*
|
||
* @param index The index of the attribute (zero-based).
|
||
* @param uri The Namespace URI, or the empty string if
|
||
* none is available or Namespace processing is not
|
||
* being performed.
|
||
* @param localName The local name, or the empty string if
|
||
* Namespace processing is not being performed.
|
||
* @param qName The qualified name, or the empty string
|
||
* if qualified names are not available.
|
||
* @param type The attribute type as a string.
|
||
* @param value The attribute value.
|
||
* @exception java.lang.ArrayIndexOutOfBoundsException When the
|
||
* supplied index does not point to an attribute
|
||
* in the list.
|
||
*/
|
||
public void setAttribute (int index, String uri, String localName,
|
||
String qName, String type, String value)
|
||
{
|
||
if (index >= 0 && index < length) {
|
||
data[index*5] = uri;
|
||
data[index*5+1] = localName;
|
||
data[index*5+2] = qName;
|
||
data[index*5+3] = type;
|
||
data[index*5+4] = value;
|
||
} else {
|
||
badIndex(index);
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* Remove an attribute from the list.
|
||
*
|
||
* @param index The index of the attribute (zero-based).
|
||
* @exception java.lang.ArrayIndexOutOfBoundsException When the
|
||
* supplied index does not point to an attribute
|
||
* in the list.
|
||
*/
|
||
public void removeAttribute (int index)
|
||
{
|
||
if (index >= 0 && index < length) {
|
||
if (index < length - 1) {
|
||
System.arraycopy(data, (index+1)*5, data, index*5,
|
||
(length-index-1)*5);
|
||
}
|
||
index = (length - 1) * 5;
|
||
data [index++] = null;
|
||
data [index++] = null;
|
||
data [index++] = null;
|
||
data [index++] = null;
|
||
data [index] = null;
|
||
length--;
|
||
} else {
|
||
badIndex(index);
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* Set the Namespace URI of a specific attribute.
|
||
*
|
||
* @param index The index of the attribute (zero-based).
|
||
* @param uri The attribute's Namespace URI, or the empty
|
||
* string for none.
|
||
* @exception java.lang.ArrayIndexOutOfBoundsException When the
|
||
* supplied index does not point to an attribute
|
||
* in the list.
|
||
*/
|
||
public void setURI (int index, String uri)
|
||
{
|
||
if (index >= 0 && index < length) {
|
||
data[index*5] = uri;
|
||
} else {
|
||
badIndex(index);
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* Set the local name of a specific attribute.
|
||
*
|
||
* @param index The index of the attribute (zero-based).
|
||
* @param localName The attribute's local name, or the empty
|
||
* string for none.
|
||
* @exception java.lang.ArrayIndexOutOfBoundsException When the
|
||
* supplied index does not point to an attribute
|
||
* in the list.
|
||
*/
|
||
public void setLocalName (int index, String localName)
|
||
{
|
||
if (index >= 0 && index < length) {
|
||
data[index*5+1] = localName;
|
||
} else {
|
||
badIndex(index);
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* Set the qualified name of a specific attribute.
|
||
*
|
||
* @param index The index of the attribute (zero-based).
|
||
* @param qName The attribute's qualified name, or the empty
|
||
* string for none.
|
||
* @exception java.lang.ArrayIndexOutOfBoundsException When the
|
||
* supplied index does not point to an attribute
|
||
* in the list.
|
||
*/
|
||
public void setQName (int index, String qName)
|
||
{
|
||
if (index >= 0 && index < length) {
|
||
data[index*5+2] = qName;
|
||
} else {
|
||
badIndex(index);
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* Set the type of a specific attribute.
|
||
*
|
||
* @param index The index of the attribute (zero-based).
|
||
* @param type The attribute's type.
|
||
* @exception java.lang.ArrayIndexOutOfBoundsException When the
|
||
* supplied index does not point to an attribute
|
||
* in the list.
|
||
*/
|
||
public void setType (int index, String type)
|
||
{
|
||
if (index >= 0 && index < length) {
|
||
data[index*5+3] = type;
|
||
} else {
|
||
badIndex(index);
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
* Set the value of a specific attribute.
|
||
*
|
||
* @param index The index of the attribute (zero-based).
|
||
* @param value The attribute's value.
|
||
* @exception java.lang.ArrayIndexOutOfBoundsException When the
|
||
* supplied index does not point to an attribute
|
||
* in the list.
|
||
*/
|
||
public void setValue (int index, String value)
|
||
{
|
||
if (index >= 0 && index < length) {
|
||
data[index*5+4] = value;
|
||
} else {
|
||
badIndex(index);
|
||
}
|
||
}
|
||
|
||
|
||
|
||
////////////////////////////////////////////////////////////////////
|
||
// Internal methods.
|
||
////////////////////////////////////////////////////////////////////
|
||
|
||
|
||
/**
|
||
* Ensure the internal array's capacity.
|
||
*
|
||
* @param n The minimum number of attributes that the array must
|
||
* be able to hold.
|
||
*/
|
||
private void ensureCapacity (int n) {
|
||
if (n <= 0) {
|
||
return;
|
||
}
|
||
int max;
|
||
if (data == null || data.length == 0) {
|
||
max = 25;
|
||
}
|
||
else if (data.length >= n * 5) {
|
||
return;
|
||
}
|
||
else {
|
||
max = data.length;
|
||
}
|
||
while (max < n * 5) {
|
||
max *= 2;
|
||
}
|
||
|
||
String newData[] = new String[max];
|
||
if (length > 0) {
|
||
System.arraycopy(data, 0, newData, 0, length*5);
|
||
}
|
||
data = newData;
|
||
}
|
||
|
||
|
||
/**
|
||
* Report a bad array index in a manipulator.
|
||
*
|
||
* @param index The index to report.
|
||
* @exception java.lang.ArrayIndexOutOfBoundsException Always.
|
||
*/
|
||
private void badIndex (int index)
|
||
throws ArrayIndexOutOfBoundsException
|
||
{
|
||
String msg =
|
||
"Attempt to modify attribute at illegal index: " + index;
|
||
throw new ArrayIndexOutOfBoundsException(msg);
|
||
}
|
||
|
||
|
||
|
||
////////////////////////////////////////////////////////////////////
|
||
// Internal state.
|
||
////////////////////////////////////////////////////////////////////
|
||
|
||
int length;
|
||
String data [];
|
||
|
||
}
|
||
|
||
// end of AttributesImpl.java
|
||
|