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   1  <?php
   2  /**
   3   * File containing the ezcGraphArrayDataSet class
   4   *
   5   * @package Graph
   6   * @version 1.5
   7   * @copyright Copyright (C) 2005-2009 eZ Systems AS. All rights reserved.
   8   * @license http://ez.no/licenses/new_bsd New BSD License
   9   */
  10  /**
  11   * Dataset class which receives arrays and use them as a base for datasets.
  12   *
  13   * @version 1.5
  14   * @package Graph
  15   * @mainclass
  16   */
  17  class ezcGraphArrayDataSet extends ezcGraphDataSet
  18  {
  19      /**
  20       * Constructor
  21       * 
  22       * @param array|Iterator $data Array or Iterator containing the data
  23       * @return void
  24       */
  25      public function __construct( $data )
  26      {
  27          $this->createFromArray( $data );
  28          parent::__construct();
  29      }
  30  
  31      /**
  32       * setData
  33       *
  34       * Can handle data provided through an array or iterator.
  35       * 
  36       * @param array|Iterator $data 
  37       * @access public
  38       * @return void
  39       */
  40      protected function createFromArray( $data = array() ) 
  41      {
  42          if ( !is_array( $data ) && 
  43               !( $data instanceof Traversable ) )
  44          {
  45              throw new ezcGraphInvalidArrayDataSourceException( $data );
  46          }
  47  
  48          $this->data = array();
  49          foreach ( $data as $key => $value )
  50          {
  51              $this->data[$key] = $value;
  52          }
  53  
  54          if ( !count( $this->data ) )
  55          {
  56              throw new ezcGraphInvalidDataException( 'Data sets should contain some values.' );
  57          }
  58      }
  59  
  60      /**
  61       * Returns the number of elements in this dataset
  62       * 
  63       * @return int
  64       */
  65      public function count()
  66      {
  67          return count( $this->data );
  68      }
  69  }
  70  
  71  ?>