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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.ConditionType;
25  import org.opensaml.xacml.policy.ExpressionType;
26  import org.opensaml.xml.XMLObject;
27  import org.opensaml.xml.validation.AbstractValidatingXMLObject;
28  
29  /**
30   *Implementation of {@link ConditionType}.
31   */
32  public class ConditionTypeImpl extends AbstractValidatingXMLObject implements ConditionType {
33  
34      /**List of expressions.*/
35      private ExpressionType expression;
36      
37      /**
38       * Constructor.
39       * @param namespaceURI the namespace the element is in
40       * @param elementLocalName the local name of the XML element this Object represents
41       * @param namespacePrefix the prefix for the given namespace
42       */
43      protected ConditionTypeImpl(String namespaceURI, String elementLocalName, String namespacePrefix){
44          super(namespaceURI,elementLocalName,namespacePrefix);    
45      }
46    
47      /** {@inheritDoc} */
48      public ExpressionType getExpression() {
49          return expression;
50      }
51      
52      /** {@inheritDoc} */
53      public void setExpression(ExpressionType expression){
54          this.expression = prepareForAssignment(this.expression, expression);
55      }
56  
57      /** {@inheritDoc} */
58      public List<XMLObject> getOrderedChildren() {
59          ArrayList<XMLObject> children = new ArrayList<XMLObject>();
60                 
61          if(expression != null){
62              children.add(expression);
63          }       
64          return Collections.unmodifiableList(children);
65      }
66  }