/* * The Apache Software License, Version 1.1 * * * Copyright (c) 2001-2004 The Apache Software Foundation. All rights * reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. 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For more * information on the Apache Software Foundation, please see * . */ package com.sun.org.apache.xerces.internal.xinclude; import java.util.Enumeration; import com.sun.org.apache.xerces.internal.util.NamespaceSupport; import com.sun.org.apache.xerces.internal.util.XMLSymbols; import com.sun.org.apache.xerces.internal.xni.NamespaceContext; /** * This implementation of NamespaceContext has the ability to maintain multiple * scopes of namespace/prefix bindings. This is useful it situtions 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,v 1.5 2004/01/22 16:08:58 mrglavas Exp $ */ 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 com.sun.org.apache.xerces.internal.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 com.sun.org.apache.xerces.internal.xni.NamespaceContext#getPrefix(java.lang.String) */ public String getPrefix(String uri) { return getPrefix(uri, fNamespaceSize, fScope[fCurrentScope]); } /* (non-Javadoc) * @see com.sun.org.apache.xerces.internal.xni.NamespaceContext#getURI(java.lang.String) */ public String getURI(String prefix) { return getURI(prefix, fNamespaceSize, fScope[fCurrentScope]); } public String getPrefix(String uri, int context) { return getPrefix(uri, fContext[context+1], fScope[getScopeForContext(context)]); } public String getURI(String prefix, int context) { return getURI(prefix, fContext[context+1], 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; } /** * Onlys 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(); } }