| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.ambari.server.controller.predicate; |
| |
| import org.apache.ambari.server.controller.spi.Resource; |
| |
| import java.util.Arrays; |
| import java.util.LinkedList; |
| import java.util.List; |
| |
| /** |
| * Predicate which evaluates to true if any of the predicates in a predicate |
| * array evaluate to true. |
| */ |
| public class OrPredicate extends ArrayPredicate { |
| |
| public OrPredicate(BasePredicate... predicates) { |
| super(predicates); |
| } |
| |
| @Override |
| public BasePredicate create(BasePredicate... predicates) { |
| return instance(predicates); |
| } |
| |
| public static BasePredicate instance(BasePredicate... predicates) { |
| List<BasePredicate> predicateList = new LinkedList<BasePredicate>(); |
| |
| // Simplify the predicate array |
| for (BasePredicate predicate : predicates) { |
| if (predicate instanceof AlwaysPredicate) { |
| return predicate; |
| } |
| else if (predicate instanceof OrPredicate) { |
| predicateList.addAll(Arrays.asList(((OrPredicate) predicate).getPredicates())); |
| } |
| else { |
| predicateList.add(predicate); |
| } |
| } |
| return predicateList.size() == 1 ? |
| predicateList.get(0) : |
| new OrPredicate(predicateList.toArray(new BasePredicate[predicateList.size()])); |
| } |
| |
| @Override |
| public boolean evaluate(Resource resource) { |
| BasePredicate[] predicates = getPredicates(); |
| for (BasePredicate predicate : predicates) { |
| if (predicate.evaluate(resource)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public String getOperator() { |
| return "OR"; |
| } |
| } |