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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 org.apache.mina.statemachine.event.Event;
    23
    24  /**
    25   * Lookups a {@link StateContext} from a collection of event arguments.
    26   *
    27   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
    28   */
    29  public interface StateContextLookup {
    30      /**
    31       * Searches the arguments from an {@link Event} and returns a
    32       * {@link StateContext} if any of the arguments holds one. NOTE! This method
    33       * must create a new {@link StateContext} if a compatible object is in
    34       * the arguments and the next time that same object is passed to this
    35       * method the same {@link StateContext} should be returned.
    36       */
    37      StateContext lookup(Object[] eventArgs);
    38  }