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   1  <?php
   2  /*
   3   * $Id: Reference.php 3076 2006-12-18 08:52:12Z fabien $
   4   *
   5   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   6   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   7   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   8   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   9   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  10   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  11   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  12   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  13   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  14   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  15   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  16   *
  17   * This software consists of voluntary contributions made by many individuals
  18   * and is licensed under the LGPL. For more information please see
  19   * <http://phing.info>. 
  20   */
  21  
  22  /** Class to hold a reference to another object in the project.
  23   * @package phing.types
  24   */
  25  class Reference {
  26  
  27      protected $refid;
  28  
  29      function __construct($id = null) {
  30          if ($id !== null) {
  31              $this->setRefId($id);
  32          }
  33      }
  34  
  35      function setRefId($id) {
  36          $this->refid = (string) $id;
  37      }
  38  
  39      function getRefId() {
  40          return $this->refid;
  41      }
  42  
  43      /** returns reference to object in references container of project */
  44      function getReferencedObject($project) {    
  45          if ($this->refid === null) {
  46              throw new BuildException("No reference specified");
  47          }
  48          $refs = $project->getReferences();
  49          $o = @$refs[$this->refid];
  50          if (!is_object($o)) {       
  51              throw new BuildException("Reference {$this->refid} not found.");
  52          }
  53          return $o;
  54      }
  55  }
  56  ?>