- /*
- * Copyright 1999-2004 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.
- */
- // $Id: JAXPPrefixResolver.java,v 1.2 2004/07/10 03:27:20 rameshm Exp $
-
- package com.sun.org.apache.xpath.internal.jaxp;
-
- import org.w3c.dom.Node;
- import org.w3c.dom.NamedNodeMap;
- import com.sun.org.apache.xml.internal.utils.PrefixResolver;
-
- import javax.xml.namespace.NamespaceContext;
-
- /**
- * <meta name="usage" content="general"/>
- * This class implements a Default PrefixResolver which
- * can be used to perform prefix-to-namespace lookup
- * for the XPath object.
- * This class delegates the resolution to the passed NamespaceContext
- */
- public class JAXPPrefixResolver implements PrefixResolver
- {
-
- private NamespaceContext namespaceContext;
-
-
- public JAXPPrefixResolver ( NamespaceContext nsContext ) {
- this.namespaceContext = nsContext;
- }
-
-
- public String getNamespaceForPrefix( String prefix ) {
- return namespaceContext.getNamespaceURI( prefix );
- }
-
- /**
- * Return the base identifier.
- *
- * @return null
- */
- public String getBaseIdentifier() {
- return null;
- }
-
- /**
- * @see PrefixResolver#handlesNullPrefixes()
- */
- public boolean handlesNullPrefixes() {
- return false;
- }
-
-
- /**
- * The URI for the XML namespace.
- * (Duplicate of that found in com.sun.org.apache.xpath.internal.XPathContext).
- */
-
- public static final String S_XMLNAMESPACEURI =
- "http://www.w3.org/XML/1998/namespace";
-
-
- /**
- * Given a prefix and a Context Node, get the corresponding namespace.
- * 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;
- }
-
- }
-