| /* |
| * 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 "Xalan" 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, Lotus |
| * Development Corporation., http://www.lotus.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| package org.apache.xml.utils; |
| |
| import org.w3c.dom.Node; |
| import org.w3c.dom.NamedNodeMap; |
| |
| /** |
| * <meta name="usage" content="general"/> |
| * This class implements a generic PrefixResolver that |
| * can be used to perform prefix-to-namespace lookup |
| * for the XPath object. |
| */ |
| public class PrefixResolverDefault implements PrefixResolver |
| { |
| |
| /** |
| * The context to resolve the prefix from, if the context |
| * is not given. |
| */ |
| Node m_context; |
| |
| /** |
| * The URI for the XML namespace. |
| * (Duplicate of that found in org.apache.xpath.XPathContext). |
| */ |
| public static final String S_XMLNAMESPACEURI = |
| "http://www.w3.org/XML/1998/namespace"; |
| |
| /** |
| * Construct a PrefixResolverDefault object. |
| * @param xpathExpressionContext The context from |
| * which XPath expression prefixes will be resolved. |
| * Warning: This will not work correctly if xpathExpressionContext |
| * is an attribute node. |
| * @param xpathExpressionContext Node from which to start searching for a |
| * xmlns attribute that binds a prefix to a namespace (when the namespace |
| * context is not specified in the getNamespaceForPrefix call). |
| */ |
| public PrefixResolverDefault(Node xpathExpressionContext) |
| { |
| m_context = xpathExpressionContext; |
| } |
| |
| /** |
| * Given a namespace, get the corrisponding prefix. This assumes that |
| * the PrevixResolver hold's it's own namespace context, or is a namespace |
| * context itself. |
| * @param prefix Prefix to resolve. |
| * @return Namespace that prefix resolves to, or null if prefix |
| * is not bound. |
| */ |
| public String getNamespaceForPrefix(String prefix) |
| { |
| return getNamespaceForPrefix(prefix, m_context); |
| } |
| |
| /** |
| * Given a namespace, get the corrisponding prefix. |
| * Warning: This will not work correctly if namespaceContext |
| * is an attribute node. |
| * @param prefix Prefix to resolve. |
| * @param namespaceContext Node from which to start searching for a |
| * xmlns attribute that binds a prefix to a namespace. |
| * @return Namespace that prefix resolves to, or null if prefix |
| * is not bound. |
| */ |
| public String getNamespaceForPrefix(String prefix, |
| org.w3c.dom.Node namespaceContext) |
| { |
| |
| Node parent = namespaceContext; |
| String namespace = null; |
| |
| if (prefix.equals("xml")) |
| { |
| namespace = S_XMLNAMESPACEURI; |
| } |
| else |
| { |
| int type; |
| |
| while ((null != parent) && (null == namespace) |
| && (((type = parent.getNodeType()) == Node.ELEMENT_NODE) |
| || (type == Node.ENTITY_REFERENCE_NODE))) |
| { |
| if (type == Node.ELEMENT_NODE) |
| { |
| NamedNodeMap nnm = parent.getAttributes(); |
| |
| for (int i = 0; i < nnm.getLength(); i++) |
| { |
| Node attr = nnm.item(i); |
| String aname = attr.getNodeName(); |
| boolean isPrefix = aname.startsWith("xmlns:"); |
| |
| if (isPrefix || aname.equals("xmlns")) |
| { |
| int index = aname.indexOf(':'); |
| String p = isPrefix ? aname.substring(index + 1) : ""; |
| |
| if (p.equals(prefix)) |
| { |
| namespace = attr.getNodeValue(); |
| |
| break; |
| } |
| } |
| } |
| } |
| |
| parent = parent.getParentNode(); |
| } |
| } |
| |
| return namespace; |
| } |
| |
| /** |
| * Return the base identifier. |
| * |
| * @return null |
| */ |
| public String getBaseIdentifier() |
| { |
| return null; |
| } |
| } |