1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 *
19 */
20 package org.apache.mina.statemachine.context;
21
22 import java.util.HashMap;
23 import java.util.Map;
24
25 import org.apache.commons.lang.builder.ToStringBuilder;
26 import org.apache.mina.statemachine.State;
27
28 /**
29 * Abstract {@link StateContext} which uses a {@link Map} to store the
30 * attributes.
31 *
32 * @author <a href="http://mina.apache.org">Apache MINA Project</a>
33 */
34 public abstract class AbstractStateContext implements StateContext {
35 private State currentState = null;
36
37 private Map<Object, Object> attributes = null;
38
39 public Object getAttribute(Object key) {
40 return getAttributes().get(key);
41 }
42
43 public State getCurrentState() {
44 return currentState;
45 }
46
47 public void setAttribute(Object key, Object value) {
48 getAttributes().put(key, value);
49 }
50
51 public void setCurrentState(State state) {
52 currentState = state;
53 }
54
55 protected Map<Object, Object> getAttributes() {
56 if (attributes == null) {
57 attributes = new HashMap<Object, Object>();
58 }
59 return attributes;
60 }
61
62 public String toString() {
63 return new ToStringBuilder(this).append("currentState", currentState).append("attributes", attributes)
64 .toString();
65 }
66 }