performance-art.fr/sites/all/modules/gui/PerfMigrate/PerfMigrate.docs_update.inc

<?php
/**
 * PerfGroupeNodeMigration
 * 
 */
abstract class PerfDocsNodeUpdateMigration extends PerfApiMigration {
  public function __construct() {
		
    parent::__construct();
    
    $this->systemOfRecord = Migration::DESTINATION;

		$this->fields += array(
			'ID' => t('id'),
			'images' => t('images'),
      'images_title' => t('images title'),
      'images_alt' => t('images alt'),
    );
    
    // The source ID here is the one retrieved from the XML listing file, and
    // used to identify the specific item's file
    $this->map = new MigrateSQLMap($this->machineName,
      array(
        'ID' => array(
          'type' => 'varchar',
          'length' => 255,
          'not null' => TRUE,
        )
      ),
      MigrateDestinationNode::getKeySchema()
    );

  	// This can also be an URL instead of a file path.
    $xml_folder = DRUPAL_ROOT . '/' . drupal_get_path('module', 'PerfMigrate') . '/xml/';
    $items_url = $xml_folder . $this->itemsfile;


    $item_ID_xpath = '@ID';         // relative to item_xpath and gets assembled
                                    // into full path /producers/producer/sourceid


    $items_class = new MigrateItemsXML($items_url, $this->item_xpath, $item_ID_xpath); // 
    $this->source = new MigrateSourceMultiItems($items_class, $this->fields);
    
    $this->destination = new MigrateDestinationNode('document');
  	
		#images
		$this->addFieldMapping('field_images', 'images');
		$this->addFieldMapping('field_images:source_dir')->defaultValue('public://SRC_IMAGES');
    $this->addFieldMapping('field_images:file_replace')->defaultValue(FILE_EXISTS_REPLACE);
		$this->addFieldMapping('field_images:title', 'images_title');
    $this->addFieldMapping('field_images:alt', 'images_alt');


  }
  
  public function prepareRow($row){
		// dsm($row , '--- $row ---');
		$xml = $row->xml;    
		
		#images
		$images = array();
    $titles = array();
    $alts = array();
		foreach ($xml->xpath('IMAGE_CONSULTABLE') as $xml_image) {
			$images[] = $this->getAttribute($xml_image, 'SRC');
      $alts[] = $this->getAttribute($xml_image, 'ALT');
      $titles[] = $this->getAttribute($xml_image, 'TITLE');
		}
		$row->images = $images;
    $row->images_title = $titles;
    $row->images_alt = $alts;
		
	}

	// public function prepare($node, stdClass $row) {
	  
 //  }
	
	
}