| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 1999 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. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xerces" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 1999, International |
| * Business Machines, Inc., http://www.apache.org. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| package org.apache.xerces.utils; |
| |
| /** |
| * NamespacesScope provides a data structure for mapping namespace prefixes |
| * to their URI's. The mapping accurately reflects the scoping of namespaces |
| * at a particular instant in time. |
| */ |
| public class NamespacesScope { |
| /** |
| * NamespacesHandler allows a client to be notified when namespace scopes change |
| */ |
| public interface NamespacesHandler { |
| /** |
| * startNamespaceDeclScope is called when a new namespace scope is created |
| * |
| * @param prefix the StringPool handle of the namespace prefix being declared |
| * @param uri the StringPool handle of the namespace's URI |
| * @exception java.lang.Exception |
| */ |
| public void startNamespaceDeclScope(int prefix, int uri) throws Exception; |
| /** |
| * endNamespaceDeclScope is called when a namespace scope ends |
| * |
| * @param prefix the StringPool handle of the namespace prefix going out of scope |
| * @exception java.lang.Exception |
| */ |
| public void endNamespaceDeclScope(int prefix) throws Exception; |
| } |
| public NamespacesScope(NamespacesHandler handler) { |
| fHandler = handler; |
| fNamespaceMappings[0] = new int[9]; |
| fNamespaceMappings[0][0] = 1; |
| } |
| /** |
| * set the namespace URI for given prefix |
| * |
| * @param prefix the StringPool handler of the prefix |
| * @param namespace the StringPool handle of the namespace URI |
| */ |
| public void setNamespaceForPrefix(int prefix, int namespace) throws Exception { |
| int offset = fNamespaceMappings[fElementDepth][0]; |
| if (offset == fNamespaceMappings[fElementDepth].length) { |
| int[] newMappings = new int[offset + 8]; |
| System.arraycopy(fNamespaceMappings[fElementDepth], 0, newMappings, 0, offset); |
| fNamespaceMappings[fElementDepth] = newMappings; |
| } |
| fNamespaceMappings[fElementDepth][offset++] = prefix; |
| fNamespaceMappings[fElementDepth][offset++] = namespace; |
| fNamespaceMappings[fElementDepth][0] = offset; |
| if (fElementDepth > 0) |
| fHandler.startNamespaceDeclScope(prefix, namespace); |
| } |
| /** |
| * retreive the namespace URI for a prefix |
| * |
| * @param prefix the StringPool handle of the prefix |
| */ |
| public int getNamespaceForPrefix(int prefix) { |
| for (int depth = fElementDepth; depth >= 0; depth--) { |
| int offset = fNamespaceMappings[depth][0]; |
| for (int i = 1; i < offset; i += 2) { |
| if (prefix == fNamespaceMappings[depth][i]) { |
| return fNamespaceMappings[depth][i+1]; |
| } |
| } |
| } |
| return -1; |
| } |
| /** |
| * Add a new namespace mapping |
| */ |
| public void increaseDepth() throws Exception { |
| fElementDepth++; |
| if (fElementDepth == fNamespaceMappings.length) { |
| int[][] newMappings = new int[fElementDepth + 8][]; |
| System.arraycopy(fNamespaceMappings, 0, newMappings, 0, fElementDepth); |
| fNamespaceMappings = newMappings; |
| } |
| if (fNamespaceMappings[fElementDepth] == null) |
| fNamespaceMappings[fElementDepth] = new int[9]; |
| fNamespaceMappings[fElementDepth][0] = 1; |
| } |
| /** |
| * Remove a namespace mappng |
| */ |
| public void decreaseDepth() throws Exception { |
| if (fElementDepth > 0) { |
| int offset = fNamespaceMappings[fElementDepth][0]; |
| while (offset > 1) { |
| offset -= 2; |
| fHandler.endNamespaceDeclScope(fNamespaceMappings[fElementDepth][offset]); |
| } |
| } |
| fElementDepth--; |
| } |
| private NamespacesHandler fHandler = null; |
| private int fElementDepth = 0; |
| private int[][] fNamespaceMappings = new int[8][]; |
| } |