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1   /*
2    * Copyright 2008 University Corporation for Advanced Internet Development, Inc.
3    * Copyright 2008 Members of the EGEE Collaboration.
4    * 
5    * Licensed under the Apache License, Version 2.0 (the "License");
6    * you may not use this file except in compliance with the License.
7    * You may obtain a copy of the License at
8    *
9    * http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.opensaml.xacml.policy.impl;
19  
20  import java.util.ArrayList;
21  import java.util.Collections;
22  import java.util.List;
23  
24  import org.opensaml.xacml.policy.ExpressionType;
25  import org.opensaml.xacml.policy.VariableReferenceType;
26  import org.opensaml.xml.XMLObject;
27  import org.opensaml.xml.util.XMLObjectChildrenList;
28  import org.opensaml.xml.validation.AbstractValidatingXMLObject;
29  
30  /**
31   * Implementation of {@link VariableReferenceType}.
32   */
33  public class VariableReferenceTypeImpl extends AbstractValidatingXMLObject implements VariableReferenceType {
34  
35      /**List or expressions.*/
36      private XMLObjectChildrenList<ExpressionType> expressions;
37      
38      /**Variable id.*/
39      private String valiableId;
40      
41      /**
42       * Constructor.
43       * @param namespaceURI the namespace the element is in
44       * @param elementLocalName the local name of the XML element this Object represents
45       * @param namespacePrefix the prefix for the given namespace
46       */
47      protected VariableReferenceTypeImpl(String namespaceURI, String elementLocalName, String namespacePrefix){
48          super(namespaceURI,elementLocalName,namespacePrefix);
49          expressions = new XMLObjectChildrenList<ExpressionType>(this);
50      }
51      
52      /** {@inheritDoc} */
53      public List<ExpressionType> getExpressions() {
54          return expressions;
55      }   
56  
57      /** {@inheritDoc} */
58      public String getVariableId() {
59          return valiableId;
60      }
61  
62      /** {@inheritDoc} */
63      public void setVariableId(String id) {
64         this.valiableId = prepareForAssignment(this.valiableId,id);
65      }
66  
67      /** {@inheritDoc} */
68      public List<XMLObject> getOrderedChildren() {
69          ArrayList<XMLObject> children = new ArrayList<XMLObject>();
70  
71          if(!expressions.isEmpty()){
72              children.addAll(expressions);
73          }            
74          return Collections.unmodifiableList(children);
75      }
76  
77  }