001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 * 019 */ 020package org.apache.mina.statemachine.context; 021 022import java.util.HashMap; 023import java.util.Map; 024 025import org.apache.mina.statemachine.State; 026 027/** 028 * Abstract {@link StateContext} which uses a {@link Map} to store the 029 * attributes. 030 * 031 * @author <a href="http://mina.apache.org">Apache MINA Project</a> 032 */ 033public abstract class AbstractStateContext implements StateContext { 034 private State currentState = null; 035 036 private Map<Object, Object> attributes = null; 037 038 public Object getAttribute(Object key) { 039 return getAttributes().get(key); 040 } 041 042 public State getCurrentState() { 043 return currentState; 044 } 045 046 public void setAttribute(Object key, Object value) { 047 getAttributes().put(key, value); 048 } 049 050 public void setCurrentState(State state) { 051 currentState = state; 052 } 053 054 protected Map<Object, Object> getAttributes() { 055 if (attributes == null) { 056 attributes = new HashMap<Object, Object>(); 057 } 058 return attributes; 059 } 060 061 public String toString() { 062 StringBuilder sb = new StringBuilder(); 063 064 sb.append("StateContext["); 065 sb.append("currentState=").append(currentState); 066 sb.append(",attributes=").append(attributes); 067 sb.append("]"); 068 069 return sb.toString(); 070 } 071}