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    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  }