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Xerces2 is the next generation of high performance, fully compliant XML parsers in the Apache Xerces family.
This new version of Xerces introduces the Xerces Native Interface (XNI), a complete framework for building
parser components and configurations that is extremely modular and easy to program. The Apache Xerces2 parser is
the reference implementation of XNI but other parser components, configurations, and parsers can be written
using the Xerces Native Interface. For complete design and implementation documents, refer to the XNI Manual.
Xerces2 is a fully conforming XML Schema 1.0 processor. A partial experimental implementation of the XML Schema
1.1 Structures and Datatypes Working Drafts (December 2009) and an experimental implementation of the XML Schema
Definition Language (XSD): Component Designators (SCD) Candidate Recommendation (January 2010) are provided for
evaluation. For more information, refer to the XML Schema page. Xerces2 also provides a complete implementation
of the Document Object Model Level 3 Core and Load/Save W3C Recommendations and provides a complete
implementation of the XML Inclusions (XInclude) W3C Recommendation. It also provides support for OASIS XML
Catalogs v1.1. Xerces2 is able to parse documents written according to the XML 1.1 Recommendation, except that
it does not yet provide an option to enable normalization checking as described in section 2.13 of this
specification. It also handles namespaces according to the XML Namespaces 1.1 Recommendation, and will correctly
serialize XML 1.1 documents if the DOM level 3 load/save APIs are in use.
/*
* 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.xinclude;
import java.util.Enumeration;
import org.apache.xerces.util.NamespaceSupport;
import org.apache.xerces.util.XMLSymbols;
import org.apache.xerces.xni.NamespaceContext;
/**
* This implementation of NamespaceContext has the ability to maintain multiple
* scopes of namespace/prefix bindings. This is useful in situations when it is
* not always appropriate for elements to inherit the namespace bindings of their
* ancestors (such as included elements in XInclude).
*
* When searching for a URI to match a prefix, or a prefix to match a URI, it is
* searched for in the current context, then the ancestors of the current context,
* up to the beginning of the current scope. Other scopes are not searched.
*
* @author Peter McCracken, IBM
*
* @version $Id: MultipleScopeNamespaceSupport.java 447243 2006-09-18 05:15:27Z mrglavas $
*/
public class MultipleScopeNamespaceSupport extends NamespaceSupport {
protected int[] fScope = new int[8];
protected int fCurrentScope;
/**
*
*/
public MultipleScopeNamespaceSupport() {
super();
fCurrentScope = 0;
fScope[0] = 0;
}
/**
* @param context
*/
public MultipleScopeNamespaceSupport(NamespaceContext context) {
super(context);
fCurrentScope = 0;
fScope[0] = 0;
}
/* (non-Javadoc)
* @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 = fContext[fScope[fCurrentScope]];
i <= (fNamespaceSize - 2);
i += 2) {
prefix = fNamespace[i];
for (int k = 0; k < count; k++) {
if (fPrefixes[k] == prefix) {
unique = false;
break;
}
}
if (unique) {
fPrefixes[count++] = prefix;
}
unique = true;
}
return new Prefixes(fPrefixes, count);
}
public int getScopeForContext(int context) {
int scope = fCurrentScope;
while (context < fScope[scope]) {
scope--;
}
return scope;
}
/* (non-Javadoc)
* @see org.apache.xerces.xni.NamespaceContext#getPrefix(java.lang.String)
*/
public String getPrefix(String uri) {
return getPrefix(uri, fNamespaceSize, fContext[fScope[fCurrentScope]]);
}
/* (non-Javadoc)
* @see org.apache.xerces.xni.NamespaceContext#getURI(java.lang.String)
*/
public String getURI(String prefix) {
return getURI(prefix, fNamespaceSize, fContext[fScope[fCurrentScope]]);
}
public String getPrefix(String uri, int context) {
return getPrefix(uri, fContext[context+1], fContext[fScope[getScopeForContext(context)]]);
}
public String getURI(String prefix, int context) {
return getURI(prefix, fContext[context+1], fContext[fScope[getScopeForContext(context)]]);
}
public String getPrefix(String uri, int start, int end) {
// this saves us from having a copy of each of these in fNamespace for each scope
if (uri == NamespaceContext.XML_URI) {
return XMLSymbols.PREFIX_XML;
}
if (uri == NamespaceContext.XMLNS_URI) {
return XMLSymbols.PREFIX_XMLNS;
}
// find uri in current context
for (int i = start; i > end; i -= 2) {
if (fNamespace[i - 1] == uri) {
if (getURI(fNamespace[i - 2]) == uri)
return fNamespace[i - 2];
}
}
// uri not found
return null;
}
public String getURI(String prefix, int start, int end) {
// this saves us from having a copy of each of these in fNamespace for each scope
if (prefix == XMLSymbols.PREFIX_XML) {
return NamespaceContext.XML_URI;
}
if (prefix == XMLSymbols.PREFIX_XMLNS) {
return NamespaceContext.XMLNS_URI;
}
// find prefix in current context
for (int i = start; i > end; i -= 2) {
if (fNamespace[i - 2] == prefix) {
return fNamespace[i - 1];
}
}
// prefix not found
return null;
}
/**
* Only resets the current scope -- all namespaces defined in lower scopes
* remain valid after a call to reset.
*/
public void reset() {
fCurrentContext = fScope[fCurrentScope];
fNamespaceSize = fContext[fCurrentContext];
}
/**
* Begins a new scope. None of the previous namespace bindings will be used,
* until the new scope is popped with popScope()
*/
public void pushScope() {
if (fCurrentScope + 1 == fScope.length) {
int[] contextarray = new int[fScope.length * 2];
System.arraycopy(fScope, 0, contextarray, 0, fScope.length);
fScope = contextarray;
}
pushContext();
fScope[++fCurrentScope] = fCurrentContext;
}
/**
* Pops the current scope. The namespace bindings from the new current scope
* are then used for searching for namespaces and prefixes.
*/
public void popScope() {
fCurrentContext = fScope[fCurrentScope--];
popContext();
}
}