View Javadoc

1   /*
2    * Copyright 2001-2004 The Apache Software Foundation.
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  package org.apache.neethi;
17  
18  import java.util.List;
19  
20  /**
21   * PolicyOperator is an interface that all Policy operators must implement. It
22   * can contain any number of Assertions or PolicyOperators and it has an
23   * implecit logic of how those PolicyComponents should be met.
24   * 
25   */
26  public interface PolicyOperator extends PolicyComponent {
27  
28      /**
29       * Add a PolicyComponent to the PolicyOperator.
30       * 
31       * @param component
32       */
33      public void addPolicyComponent(PolicyComponent component);
34  
35      /**
36       * Returns a List of PolicyComponents which this PolicyOperator contains.
37       * 
38       * @return the List of PolicyComponents that this PolicyOperator contains.
39       */
40      public List getPolicyComponents();
41  
42      /**
43       * Returns true if the PolicyOperator doesn't contain any PolicyComponents.
44       * 
45       * @return true if this PolicyOperator doesn't contain any PolicyComponenets
46       */
47      public boolean isEmpty();
48  }