| /* |
| * 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.pig.impl.plan; |
| |
| import java.io.Serializable; |
| |
| public class OperatorKey implements Serializable, Comparable<OperatorKey> { |
| private static final long serialVersionUID = 1L; |
| |
| public String scope; |
| public long id; |
| |
| public OperatorKey() { |
| this("", -1); |
| } |
| |
| public OperatorKey(String scope, long id) { |
| this.scope = scope; |
| this.id = id; |
| } |
| |
| @Override |
| public String toString() { |
| return scope + "-" + id; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (! (obj instanceof OperatorKey)) { |
| return false; |
| } |
| else { |
| OperatorKey otherKey = (OperatorKey) obj; |
| return this.scope.equals(otherKey.scope) && |
| this.id == otherKey.id; |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| return this.toString().hashCode(); |
| } |
| |
| public String getScope() { |
| return scope; |
| } |
| |
| public long getId() { |
| return id; |
| } |
| |
| public int compareTo(OperatorKey o) { |
| int scCmp = scope.compareTo(o.scope); |
| if(scCmp!=0) |
| return scCmp; |
| else{ |
| if(id>o.id) |
| return 1; |
| else if(id==o.id) |
| return 0; |
| else |
| return -1; |
| } |
| } |
| |
| /** |
| * Utility function for creating operator keys. |
| * @param scope Scope to use in creating the key. |
| * @return new operator key. |
| */ |
| public static OperatorKey genOpKey(String scope) { |
| return new OperatorKey(scope, |
| NodeIdGenerator.getGenerator().getNextNodeId(scope)); |
| } |
| |
| static public OperatorKey fromString(String op) { |
| String scope = op.substring(0, op.indexOf("-")); |
| long id = Long.parseLong(op.substring(op.indexOf("-")+1)); |
| return new OperatorKey(scope, id); |
| } |
| |
| } |