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1   /*
2    * Copyright [2006] [University Corporation for Advanced Internet Development, Inc.]
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    * http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.opensaml.xml.signature.impl;
18  
19  import org.opensaml.xml.XMLObject;
20  import org.opensaml.xml.io.UnmarshallingException;
21  import org.opensaml.xml.signature.DSAKeyValue;
22  import org.opensaml.xml.signature.KeyValue;
23  import org.opensaml.xml.signature.RSAKeyValue;
24  
25  /**
26   * A thread-safe Unmarshaller for {@link org.opensaml.xml.signature.KeyValue} objects.
27   */
28  public class KeyValueUnmarshaller extends AbstractXMLSignatureUnmarshaller {
29  
30      /** {@inheritDoc} */
31      protected void processChildElement(XMLObject parentXMLObject, XMLObject childXMLObject)
32              throws UnmarshallingException {
33          KeyValue keyValue = (KeyValue) parentXMLObject;
34  
35          if (childXMLObject instanceof DSAKeyValue) {
36              keyValue.setDSAKeyValue((DSAKeyValue) childXMLObject);
37          } else if (childXMLObject instanceof RSAKeyValue) {
38              keyValue.setRSAKeyValue((RSAKeyValue) childXMLObject);
39          } else {
40              // There can be only one...
41              if (keyValue.getUnknownXMLObject() == null) {
42                  keyValue.setUnknownXMLObject(childXMLObject);
43              } else {
44                  // If this happens, throw the others up to the parent class to be logged/handled.
45                  super.processChildElement(parentXMLObject, childXMLObject);
46              }
47          }
48      }
49  
50  }