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/*
* reserved comment block
* DO NOT REMOVE OR ALTER!
*/
/*
* Copyright 2000-2002,2004 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.impl.xs;
import com.sun.org.apache.xerces.internal.util.NamespaceSupport;
/**
* This class customizes the behaviour of the util.NamespaceSupport
* class in order to easily implement some features that we need for
* efficient schema handling. It will not be generally useful.
*
* @xerces.internal
*
* @author Neil Graham, IBM
*
*/
public class SchemaNamespaceSupport
extends NamespaceSupport {
public SchemaNamespaceSupport () {
super();
} // constructor
// more effecient than NamespaceSupport(NamespaceContext)
public SchemaNamespaceSupport(SchemaNamespaceSupport nSupport) {
fNamespaceSize = nSupport.fNamespaceSize;
if (fNamespace.length < fNamespaceSize)
fNamespace = new String[fNamespaceSize];
System.arraycopy(nSupport.fNamespace, 0, fNamespace, 0, fNamespaceSize);
fCurrentContext = nSupport.fCurrentContext;
if (fContext.length <= fCurrentContext)
fContext = new int[fCurrentContext+1];
System.arraycopy(nSupport.fContext, 0, fContext, 0, fCurrentContext+1);
} // end constructor
/**
* This method takes a set of Strings, as stored in a
* NamespaceSupport object, and "fools" the object into thinking
* that this is one unified context. This is meant to be used in
* conjunction with things like local elements, whose declarations
* may be deeply nested but which for all practical purposes may
* be regarded as being one level below the global <schema>
* element--at least with regard to namespace declarations.
* It's worth noting that the context from which the strings are
* being imported had better be using the same SymbolTable.
*/
public void setEffectiveContext (String [] namespaceDecls) {
if(namespaceDecls == null || namespaceDecls.length == 0) return;
pushContext();
int newSize = fNamespaceSize + namespaceDecls.length;
if (fNamespace.length < newSize) {
// expand namespace's size...
String[] tempNSArray = new String[newSize];
System.arraycopy(fNamespace, 0, tempNSArray, 0, fNamespace.length);
fNamespace = tempNSArray;
}
System.arraycopy(namespaceDecls, 0, fNamespace, fNamespaceSize,
namespaceDecls.length);
fNamespaceSize = newSize;
} // setEffectiveContext(String):void
/**
* This method returns an array of Strings, as would be stored in
* a NamespaceSupport object. This array contains all
* declarations except those at the global level.
*/
public String [] getEffectiveLocalContext() {
// the trick here is to recognize that all local contexts
// happen to start at fContext[3].
// context 1: empty
// context 2: decls for xml and xmlns;
// context 3: decls on <xs:schema>: the global ones
String[] returnVal = null;
if (fCurrentContext >= 3) {
int bottomLocalContext = fContext[3];
int copyCount = fNamespaceSize - bottomLocalContext;
if (copyCount > 0) {
returnVal = new String[copyCount];
System.arraycopy(fNamespace, bottomLocalContext, returnVal, 0,
copyCount);
}
}
return returnVal;
} // getEffectiveLocalContext():String
// This method removes from this object all the namespaces
// returned by getEffectiveLocalContext.
public void makeGlobal() {
if (fCurrentContext >= 3) {
fCurrentContext = 3;
fNamespaceSize = fContext[3];
}
} // makeGlobal
} // class NamespaceSupport
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