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/*
* reserved comment block
* DO NOT REMOVE OR ALTER!
*/
/*
* Copyright 2003-2005 The Apache Software Foundation.
*
* Licensed 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 com.sun.org.apache.xerces.internal.xinclude;
import com.sun.org.apache.xerces.internal.xni.NamespaceContext;
/**
* This is an implementation of NamespaceContext which is intended to be used for
* XInclude processing. It enables each context to be marked as invalid, if necessary,
* to indicate that the namespaces recorded on those contexts won't be apparent in the
* resulting infoset.
*
* @author Peter McCracken, IBM
*
*/
public class XIncludeNamespaceSupport extends MultipleScopeNamespaceSupport {
/**
* This stores whether or not the context at the matching depth was valid.
*/
private boolean[] fValidContext = new boolean[8];
/**
*
*/
public XIncludeNamespaceSupport() {
super();
}
/**
* @param context
*/
public XIncludeNamespaceSupport(NamespaceContext context) {
super(context);
}
/**
* Pushes a new context onto the stack.
*/
public void pushContext() {
super.pushContext();
if (fCurrentContext + 1 == fValidContext.length) {
boolean[] contextarray = new boolean[fValidContext.length * 2];
System.arraycopy(fValidContext, 0, contextarray, 0, fValidContext.length);
fValidContext = contextarray;
}
fValidContext[fCurrentContext] = true;
}
/**
* This method is used to set a context invalid for XInclude namespace processing.
* Any context defined by an <include> or <fallback> element is not
* valid for processing the include parent's [in-scope namespaces]. Thus, contexts
* defined by these elements are set to invalid by the XInclude processor using
* this method.
*/
public void setContextInvalid() {
fValidContext[fCurrentContext] = false;
}
/**
* This returns the namespace URI which was associated with the given pretext, in
* the context that existed at the include parent of the current element. The
* include parent is the last element, before the current one, which was not set
* to an invalid context using setContextInvalid()
*
* @param prefix the prefix of the desired URI
* @return the URI corresponding to the prefix in the context of the include parent
*/
public String getURIFromIncludeParent(String prefix) {
int lastValidContext = fCurrentContext - 1;
while (lastValidContext > 0 && !fValidContext[lastValidContext]) {
lastValidContext--;
}
return getURI(prefix, lastValidContext);
}
}
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