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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.myfaces.orchestra.viewController;
    21
    22  /**
    23   * Invokes ViewController events using the {@link ViewController} interface.
    24   * <p>
    25   * This requires that beans implement the ViewController interface in order
    26   * to receive view lifecycle events.
    27   * <p>
    28   * Other implementations are possible that do not require a bean to implement a
    29   * specific interface; see ReflectiveViewControllerExecutor for one example.
    30   * <p>
    31   * Note that each method here returns false if the target bean does not
    32   * implement the ViewController interface; this allows this executor to
    33   * be "chained" with others.
    34   */
    35  public class InterfaceViewControllerExecutor extends AbstractViewControllerExecutor
    36  {
    37      public boolean invokeInitView(String beanName, Object bean)
    38      {
    39          if (bean instanceof ViewController)
    40          {
    41              ((ViewController) bean).initView();
    42              return true;
    43          }
    44          return false;
    45      }
    46
    47      public boolean invokePreRenderView(String beanName, Object bean)
    48      {
    49          if (bean instanceof ViewController)
    50          {
    51              ((ViewController) bean).preRenderView();
    52              return true;
    53          }
    54          return false;
    55      }
    56
    57      public boolean invokePreProcess(String beanName, Object bean)
    58      {
    59          if (bean instanceof ViewController)
    60          {
    61              ((ViewController) bean).preProcess();
    62              return true;
    63          }
    64          return false;
    65      }
    66  }