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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  package org.apache.myfaces.orchestra.viewController;
    20
    21  /**
    22   * Each view controller configured with the constructor will be asked to map the given viewId.
    23   * The first one not returning NULL wins.
    24   * <p>
    25   * As an example, this can be configured to first try a mapper that converts the viewId to
    26   * a beanname, then if that fails to find a match try a mapper that uses class annotations
    27   * to find an appropriate bean.
    28   */
    29  public class CompositeViewControllerNameMapper implements ViewControllerNameMapper
    30  {
    31      private final ViewControllerNameMapper[] viewControllerNameMappers;
    32
    33      public CompositeViewControllerNameMapper(ViewControllerNameMapper[] viewControllerNameMappers)
    34      {
    35          this.viewControllerNameMappers = new ViewControllerNameMapper[viewControllerNameMappers.length];
    36          System.arraycopy(
    37                  viewControllerNameMappers, 0,
    38                  this.viewControllerNameMappers, 0,
    39                  viewControllerNameMappers.length);
    40      }
    41
    42      public String mapViewId(String viewId)
    43      {
    44          for (int i = 0; i<viewControllerNameMappers.length; i++)
    45          {
    46              String beanName = viewControllerNameMappers[i].mapViewId(viewId);
    47              if (beanName != null)
    48              {
    49                  return beanName;
    50              }
    51          }
    52
    53          return null;
    54      }
    55  }