Creating default object from empty value File /var/www/mig/migration/sites/all/modules/migrate_extras/entity_api.inc, line 227

<?php
class ItemOrderXMLMigration extends XMLMigration {
public function __construct() {
parent::__construct(MigrateGroup::getInstance('OrderFeed'));
$this->description = t('XML feed (multi items) of OrderFeed');

//$this->softDependencies = array('WineFileCopy');

$fields = array(
'Number' => t('Number'),
'Date' => t('Date'),
'SubTotal' => t('Sub Total'),
'Discount' => t('Discount'),
'ShippingCharges' => t('Shipping Charges'),
'ShippingChargesDiscount' => t('Shipping Charges Discount'),
'NumItems' => t('NumItems'),
'VATPercentage' => t('VAT Percentage'),
'CurrencyCode' => t('Currency Code'),
'PaymentTypeDesc' => t('Payment Type Desc'),
'OrderState' => t('Order State'),
);

$this->map = new MigrateSQLMap($this->machineName,
array(
'Number' => array(
'type' => 'varchar',
'length' => 225,
'not null' => TRUE,
)
),
MigrateDestinationEntityAPI::getKeySchema('entity_example_basic','first_example_bundle')
);

$xml_folder = DRUPAL_ROOT . '/' . drupal_get_path('module', 'products_import') . '/xml/';
$items_url = $xml_folder . 'OrderFeed.xml';
$item_xpath = '/Orders/Item'; // relative to document
$item_ID_xpath = 'Number'; // relative to item_xpath and gets assembled
// into full path /producers/producer/sourceid

$items_class = new MigrateItemsXML($items_url, $item_xpath, $item_ID_xpath);
$this->source = new MigrateSourceMultiItems($items_class, $fields);

$this->destination = new MigrateDestinationEntityAPI('entity_example_basic','first_example_bundle');

$this->addFieldMapping('field_number', 'Number');
// ->xpath('Number');
$this->addFieldMapping('field_subtotal', 'SubTotal');
//->xpath('SubTotal');
$this->addFieldMapping('field_discount', 'Discount');
//->xpath('Discount');
//$this->addUnmigratedDestinations(array('weight'));
}
}