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1   /**
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements. See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership. The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License. You may obtain a copy of the License at
9    *
10   * http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied. See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  package org.apache.wss4j.stax.impl.resourceResolvers;
20  
21  import javax.xml.namespace.QName;
22  import javax.xml.stream.events.Attribute;
23  
24  import org.apache.wss4j.stax.ext.WSSConstants;
25  import org.apache.xml.security.stax.ext.ResourceResolver;
26  import org.apache.xml.security.stax.ext.XMLSecurityConstants;
27  import org.apache.xml.security.stax.ext.stax.XMLSecStartElement;
28  import org.apache.xml.security.stax.impl.resourceResolvers.ResolverXPointer;
29  
30  public class WSS4JResolverXPointer extends ResolverXPointer {
31  
32      public WSS4JResolverXPointer() {
33          super();
34      }
35  
36      public WSS4JResolverXPointer(String uri) {
37          super(uri);
38      }
39  
40      @Override
41      public ResourceResolver newInstance(String uri, String baseURI) {
42          return new WSS4JResolverXPointer(uri);
43      }
44  
45      @Override
46      public boolean matches(XMLSecStartElement xmlSecStartElement) {
47          return matches(xmlSecStartElement, XMLSecurityConstants.ATT_NULL_Id);
48      }
49  
50      @Override
51      public boolean matches(XMLSecStartElement xmlSecStartElement, QName idAttributeNS) {
52          //when id is null we have #xpointer(/) and then we just return true for the first start-element
53          if (getId() == null) {
54              if (!isRootNodeOccured()) {
55                  setRootNodeOccured(true);
56                  return true;
57              }
58              return false;
59          }
60          //case #xpointer(id('ID')):
61          Attribute attribute = xmlSecStartElement.getAttributeByName(WSSConstants.ATT_WSU_ID);
62          if (attribute != null && attribute.getValue().equals(getId())) {
63              return true;
64          }
65          return super.matches(xmlSecStartElement, idAttributeNS);
66      }
67  }