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* The Apache Software License, Version 1.1
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* Copyright (c) 2000-2002 The Apache Software Foundation.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* 3. The end-user documentation included with the redistribution,
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* if any, must include the following acknowledgment:
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* "This product includes software developed by the
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* Apache Software Foundation (http://www.apache.org/)."
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* Alternately, this acknowledgment may appear in the software itself,
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* if and wherever such third-party acknowledgments normally appear.
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* 4. The names "Xerces" and "Apache Software Foundation" must
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* not be used to endorse or promote products derived from this
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* software without prior written permission. For written
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* permission, please contact apache@apache.org.
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* 5. Products derived from this software may not be called "Apache",
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* nor may "Apache" appear in their name, without prior written
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* permission of the Apache Software Foundation.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* ====================================================================
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* This software consists of voluntary contributions made by many
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* individuals on behalf of the Apache Software Foundation and was
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* originally based on software copyright (c) 1999, International
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* Business Machines, Inc., http://www.apache.org. For more
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* information on the Apache Software Foundation, please see
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* <http://www.apache.org/>.
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package org.apache.xerces.impl.xs;
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import org.apache.xerces.util.NamespaceSupport;
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* This class customizes the behaviour of the util.NamespaceSupport
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* class in order to easily implement some features that we need for
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* efficient schema handling. It will not be generally useful.
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* @author Neil Graham, IBM
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* @version $Id: SchemaNamespaceSupport.java,v 1.4 2002/08/14 22:49:28 sandygao Exp $
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public class SchemaNamespaceSupport
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extends NamespaceSupport {
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public SchemaNamespaceSupport () {
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// more effecient than NamespaceSupport(NamespaceContext)
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public SchemaNamespaceSupport(SchemaNamespaceSupport nSupport) {
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fNamespaceSize = nSupport.fNamespaceSize;
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if (fNamespace.length < fNamespaceSize)
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fNamespace = new String[fNamespaceSize];
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System.arraycopy(nSupport.fNamespace, 0, fNamespace, 0, fNamespaceSize);
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fCurrentContext = nSupport.fCurrentContext;
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if (fContext.length <= fCurrentContext)
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fContext = new int[fCurrentContext+1];
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System.arraycopy(nSupport.fContext, 0, fContext, 0, fCurrentContext+1);
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* This method takes a set of Strings, as stored in a
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* NamespaceSupport object, and "fools" the object into thinking
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* that this is one unified context. This is meant to be used in
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* conjunction with things like local elements, whose declarations
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* may be deeply nested but which for all practical purposes may
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* be regarded as being one level below the global <schema>
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* element--at least with regard to namespace declarations.
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* It's worth noting that the context from which the strings are
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* being imported had better be using the same SymbolTable.
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public void setEffectiveContext (String [] namespaceDecls) {
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if(namespaceDecls == null || namespaceDecls.length == 0) return;
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int newSize = fNamespaceSize + namespaceDecls.length;
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if (fNamespace.length < newSize) {
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// expand namespace's size...
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String[] tempNSArray = new String[newSize];
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System.arraycopy(fNamespace, 0, tempNSArray, 0, fNamespace.length);
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fNamespace = tempNSArray;
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System.arraycopy(namespaceDecls, 0, fNamespace, fNamespaceSize,
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namespaceDecls.length);
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fNamespaceSize = newSize;
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} // setEffectiveContext(String):void
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* This method returns an array of Strings, as would be stored in
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* a NamespaceSupport object. This array contains all
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* declarations except those at the global level.
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public String [] getEffectiveLocalContext() {
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// the trick here is to recognize that all local contexts
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// happen to start at fContext[3].
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// context 2: decls for xml and xmlns;
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// context 3: decls on <xs:schema>: the global ones
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String[] returnVal = null;
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if (fCurrentContext >= 3) {
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int bottomLocalContext = fContext[3];
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int copyCount = fNamespaceSize - bottomLocalContext;
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returnVal = new String[copyCount];
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System.arraycopy(fNamespace, bottomLocalContext, returnVal, 0,
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} // getEffectiveLocalContext():String
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// This method removes from this object all the namespaces
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// returned by getEffectiveLocalContext.
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public void makeGlobal() {
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if (fCurrentContext >= 3) {
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fNamespaceSize = fContext[3];
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} // class NamespaceSupport