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 }