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A slightly adapted version of Xerces 2.11.0 to allow the XMLStringBuffer responsible for XML attribute scanning to start larger and thus avoid extended appending times. The initial buffer size is controlled by settting the system property julielab.xerces.attributebuffersize (also available as constant XMLScanner#ATTRIBUTE_BUFFER_SIZE).
/*
* 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 org.apache.xerces.util;
import java.util.Enumeration;
import java.util.NoSuchElementException;
import org.apache.xerces.xni.NamespaceContext;
/**
* Namespace support for XML document handlers. This class doesn't
* perform any error checking and assumes that all strings passed
* as arguments to methods are unique symbols. The SymbolTable class
* can be used for this purpose.
*
* @author Andy Clark, IBM
*
* @version $Id: NamespaceSupport.java 965250 2010-07-18 16:04:58Z mrglavas $
*/
public class NamespaceSupport implements NamespaceContext {
//
// Data
//
/**
* Namespace binding information. This array is composed of a
* series of tuples containing the namespace binding information:
* <prefix, uri>. The default size can be set to anything
* as long as it is a power of 2 greater than 1.
*
* @see #fNamespaceSize
* @see #fContext
*/
protected String[] fNamespace = new String[16 * 2];
/** The top of the namespace information array. */
protected int fNamespaceSize;
// NOTE: The constructor depends on the initial context size
// being at least 1. -Ac
/**
* Context indexes. This array contains indexes into the namespace
* information array. The index at the current context is the start
* index of declared namespace bindings and runs to the size of the
* namespace information array.
*
* @see #fNamespaceSize
*/
protected int[] fContext = new int[8];
/** The current context. */
protected int fCurrentContext;
protected String[] fPrefixes = new String[16];
//
// Constructors
//
/** Default constructor. */
public NamespaceSupport() {
} // ()
/**
* Constructs a namespace context object and initializes it with
* the prefixes declared in the specified context.
*/
public NamespaceSupport(NamespaceContext context) {
pushContext();
// copy declaration in the context
Enumeration prefixes = context.getAllPrefixes();
while (prefixes.hasMoreElements()){
String prefix = (String)prefixes.nextElement();
String uri = context.getURI(prefix);
declarePrefix(prefix, uri);
}
} // (NamespaceContext)
//
// Public methods
//
/**
* @see org.apache.xerces.xni.NamespaceContext#reset()
*/
public void reset() {
// reset namespace and context info
fNamespaceSize = 0;
fCurrentContext = 0;
fContext[fCurrentContext] = fNamespaceSize;
// bind "xml" prefix to the XML uri
fNamespace[fNamespaceSize++] = XMLSymbols.PREFIX_XML;
fNamespace[fNamespaceSize++] = NamespaceContext.XML_URI;
// bind "xmlns" prefix to the XMLNS uri
fNamespace[fNamespaceSize++] = XMLSymbols.PREFIX_XMLNS;
fNamespace[fNamespaceSize++] = NamespaceContext.XMLNS_URI;
++fCurrentContext;
} // reset(SymbolTable)
/**
* @see org.apache.xerces.xni.NamespaceContext#pushContext()
*/
public void pushContext() {
// extend the array, if necessary
if (fCurrentContext + 1 == fContext.length) {
int[] contextarray = new int[fContext.length * 2];
System.arraycopy(fContext, 0, contextarray, 0, fContext.length);
fContext = contextarray;
}
// push context
fContext[++fCurrentContext] = fNamespaceSize;
} // pushContext()
/**
* @see org.apache.xerces.xni.NamespaceContext#popContext()
*/
public void popContext() {
fNamespaceSize = fContext[fCurrentContext--];
} // popContext()
/**
* @see org.apache.xerces.xni.NamespaceContext#declarePrefix(String, String)
*/
public boolean declarePrefix(String prefix, String uri) {
// ignore "xml" and "xmlns" prefixes
if (prefix == XMLSymbols.PREFIX_XML || prefix == XMLSymbols.PREFIX_XMLNS) {
return false;
}
// see if prefix already exists in current context
for (int i = fNamespaceSize; i > fContext[fCurrentContext]; i -= 2) {
if (fNamespace[i - 2] == prefix) {
// REVISIT: [Q] Should the new binding override the
// previously declared binding or should it
// it be ignored? -Ac
// NOTE: The SAX2 "NamespaceSupport" helper allows
// re-bindings with the new binding overwriting
// the previous binding. -Ac
fNamespace[i - 1] = uri;
return true;
}
}
// resize array, if needed
if (fNamespaceSize == fNamespace.length) {
String[] namespacearray = new String[fNamespaceSize * 2];
System.arraycopy(fNamespace, 0, namespacearray, 0, fNamespaceSize);
fNamespace = namespacearray;
}
// bind prefix to uri in current context
fNamespace[fNamespaceSize++] = prefix;
fNamespace[fNamespaceSize++] = uri;
return true;
} // declarePrefix(String,String):boolean
/**
* @see org.apache.xerces.xni.NamespaceContext#getURI(String)
*/
public String getURI(String prefix) {
// find prefix in current context
for (int i = fNamespaceSize; i > 0; i -= 2) {
if (fNamespace[i - 2] == prefix) {
return fNamespace[i - 1];
}
}
// prefix not found
return null;
} // getURI(String):String
/**
* @see org.apache.xerces.xni.NamespaceContext#getPrefix(String)
*/
public String getPrefix(String uri) {
// find uri in current context
for (int i = fNamespaceSize; i > 0; i -= 2) {
if (fNamespace[i - 1] == uri) {
if (getURI(fNamespace[i - 2]) == uri)
return fNamespace[i - 2];
}
}
// uri not found
return null;
} // getPrefix(String):String
/**
* @see org.apache.xerces.xni.NamespaceContext#getDeclaredPrefixCount()
*/
public int getDeclaredPrefixCount() {
return (fNamespaceSize - fContext[fCurrentContext]) / 2;
} // getDeclaredPrefixCount():int
/**
* @see org.apache.xerces.xni.NamespaceContext#getDeclaredPrefixAt(int)
*/
public String getDeclaredPrefixAt(int index) {
return fNamespace[fContext[fCurrentContext] + index * 2];
} // getDeclaredPrefixAt(int):String
/**
* @see org.apache.xerces.xni.NamespaceContext#getAllPrefixes()
*/
public Enumeration getAllPrefixes() {
int count = 0;
if (fPrefixes.length < (fNamespace.length/2)) {
// resize prefix array
String[] prefixes = new String[fNamespaceSize];
fPrefixes = prefixes;
}
String prefix = null;
boolean unique = true;
for (int i = 2; i < (fNamespaceSize-2); i += 2) {
prefix = fNamespace[i + 2];
for (int k=0;k 0; i -= 2) {
if (fNamespace[i - 2] == prefix) {
return true;
}
}
// prefix not found
return false;
}
protected final class Prefixes implements Enumeration {
private String[] prefixes;
private int counter = 0;
private int size = 0;
/**
* Constructor for Prefixes.
*/
public Prefixes(String [] prefixes, int size) {
this.prefixes = prefixes;
this.size = size;
}
/**
* @see java.util.Enumeration#hasMoreElements()
*/
public boolean hasMoreElements() {
return (counter< size);
}
/**
* @see java.util.Enumeration#nextElement()
*/
public Object nextElement() {
if (counter< size){
return fPrefixes[counter++];
}
throw new NoSuchElementException("Illegal access to Namespace prefixes enumeration.");
}
public String toString(){
StringBuffer buf = new StringBuffer();
for (int i=0;i © 2015 - 2025 Weber Informatics LLC | Privacy Policy