| /* |
| * 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 java.util.Arrays; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.apache.ambari.server.controller.spi.Predicate; |
| import org.apache.ambari.server.controller.utilities.PredicateHelper; |
| |
| /** |
| * Predicate which evaluates an array of predicates. |
| */ |
| public abstract class ArrayPredicate implements BasePredicate { |
| private final Predicate[] predicates; |
| private final Set<String> propertyIds = new HashSet<>(); |
| |
| // ----- Constructors ----------------------------------------------------- |
| |
| /** |
| * Constructor. |
| * |
| * @param predicates the predicates |
| */ |
| public ArrayPredicate(Predicate... predicates) { |
| this.predicates = predicates; |
| for (Predicate predicate : predicates) { |
| propertyIds.addAll(PredicateHelper.getPropertyIds(predicate)); |
| } |
| } |
| |
| |
| // ----- BasePredicate ---------------------------------------------------- |
| |
| @Override |
| public Set<String> getPropertyIds() { |
| return propertyIds; |
| } |
| |
| |
| // ----- PredicateVisitorAcceptor ----------------------------------------- |
| |
| @Override |
| public void accept(PredicateVisitor visitor) { |
| visitor.acceptArrayPredicate(this); |
| } |
| |
| |
| // ----- ArrayPredicate --------------------------------------------------- |
| |
| public abstract String getOperator(); |
| |
| /** |
| * Factory method. |
| * |
| * @param predicates the predicate array |
| * |
| * @return a new ArrayPredicate |
| */ |
| public abstract Predicate create(Predicate... predicates); |
| |
| |
| // ----- accessors -------------------------------------------------------- |
| |
| /** |
| * Get the predicates. |
| * |
| * @return the predicates |
| */ |
| public Predicate[] getPredicates() { |
| return predicates; |
| } |
| |
| |
| // ----- Object overrides -------------------------------------------------- |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (!(o instanceof ArrayPredicate)) return false; |
| |
| ArrayPredicate that = (ArrayPredicate) o; |
| |
| if (propertyIds != null ? !propertyIds.equals(that.propertyIds) : that.propertyIds != null) return false; |
| |
| // don't care about array order |
| Set<Predicate> setThisPredicates = new HashSet<>(Arrays.asList(predicates)); |
| Set<Predicate> setThatPredicates = new HashSet<>(Arrays.asList(that.predicates)); |
| return setThisPredicates.equals(setThatPredicates); |
| } |
| |
| @Override |
| public int hashCode() { |
| // don't care about array order |
| int result = predicates != null ? new HashSet<>(Arrays.asList(predicates)).hashCode() : 0; |
| result = 31 * result + (propertyIds != null ? propertyIds.hashCode() : 0); |
| return result; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| |
| for (Predicate predicate : predicates) { |
| |
| boolean arrayPredicate = predicate instanceof ArrayPredicate; |
| |
| if (sb.length() > 0) { |
| sb.append(" ").append(getOperator()).append(" "); |
| } |
| |
| if (arrayPredicate) { |
| sb.append("(").append(predicate).append(")"); |
| } else { |
| sb.append(predicate); |
| } |
| } |
| return sb.toString(); |
| } |
| } |