| package org.apache.ambari.server.controller.predicate; |
| |
| /** |
| * 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. |
| */ |
| |
| import org.apache.ambari.server.controller.spi.Resource; |
| |
| import java.util.Collections; |
| import java.util.Set; |
| |
| /** |
| * A predicate that always evaluates to true. |
| */ |
| public class AlwaysPredicate implements BasePredicate { |
| public static final AlwaysPredicate INSTANCE = new AlwaysPredicate(); |
| |
| @Override |
| public boolean evaluate(Resource resource) { |
| return true; |
| } |
| |
| @Override |
| public Set<String> getPropertyIds() { |
| return Collections.emptySet(); |
| } |
| |
| @Override |
| public void accept(PredicateVisitor visitor) { |
| visitor.acceptAlwaysPredicate(this); |
| } |
| } |