| package org.apache.helix.model; |
| |
| /* |
| * 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. |
| */ |
| |
| /** |
| * Defines a transition from one state to another |
| */ |
| public class Transition { |
| final private String _fromState; |
| final private String _toState; |
| |
| /** |
| * Instantiate with a source and destination state |
| * @param fromState source name |
| * @param toState destination name |
| */ |
| public Transition(String fromState, String toState) { |
| _fromState = fromState; |
| _toState = toState; |
| } |
| |
| @Override |
| public String toString() { |
| return _fromState + "-" + _toState; |
| } |
| |
| @Override |
| public int hashCode() { |
| return toString().hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object that) { |
| if (that == null || !(that instanceof Transition)) { |
| return false; |
| } |
| return this.toString().equalsIgnoreCase(that.toString()); |
| } |
| |
| /** |
| * Get the source state |
| * @return source state name |
| */ |
| public String getFromState() { |
| return _fromState; |
| } |
| |
| /** |
| * Get the destination state |
| * @return destination state name |
| */ |
| public String getToState() { |
| return _toState; |
| } |
| |
| } |