| /** |
| * 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.api.predicate.operators; |
| |
| import org.apache.ambari.server.api.predicate.InvalidQueryException; |
| import org.apache.ambari.server.controller.predicate.BasePredicate; |
| import org.apache.ambari.server.controller.predicate.EqualsPredicate; |
| import org.apache.ambari.server.controller.predicate.OrPredicate; |
| import org.apache.ambari.server.controller.spi.Predicate; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * IN relational operator. |
| * This is a binary operator which takes a comma delimited right operand and |
| * creates equals predicates with the left operand and each right operand token. |
| * The equals predicates are combined with an OR predicate. |
| * |
| */ |
| public class InOperator extends AbstractOperator implements RelationalOperator { |
| |
| public InOperator() { |
| super(0); |
| } |
| |
| @Override |
| public String getName() { |
| return "InOperator"; |
| } |
| |
| @Override |
| public Predicate toPredicate(String prop, String val) throws InvalidQueryException { |
| |
| if (val == null) { |
| throw new InvalidQueryException("IN operator is missing a required right operand."); |
| } |
| |
| String[] tokens = val.split(","); |
| List<EqualsPredicate> listPredicates = new ArrayList<EqualsPredicate>(); |
| for (String token : tokens) { |
| listPredicates.add(new EqualsPredicate(prop, token.trim())); |
| } |
| return listPredicates.size() == 1 ? listPredicates.get(0) : |
| buildOrPredicate(listPredicates); |
| } |
| |
| private OrPredicate buildOrPredicate(List<EqualsPredicate> listPredicates) { |
| return new OrPredicate(listPredicates.toArray(new BasePredicate[listPredicates.size()])); |
| } |
| |
| @Override |
| public TYPE getType() { |
| return TYPE.IN; |
| } |
| } |