hook_islandora_datastream_alter-example.php

<?php

/**
 * Implements hook_islandora_datastream_alter().
 */
function mjtest_islandora_datastream_alter(AbstractObject $object, AbstractDatastream $datastream, array &$context) {
  $now = date("Y-m-d H:i:s");
  $dc = <<<EOX
<oai_dc:dc xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:title>Testing at $now</dc:title>
  <dc:description>I am concocted.</dc:description>
</oai_dc:dc>
EOX;

  if ($context['action'] == 'ingest') {
    if ($object['DC'] && $datastream->id == 'DC') {
      $datastream->setContentFromString($dc);
    }
  }
  if ($context['action'] == 'modify') {
    if ($object['DC'] && $datastream->id == 'DC') {
      if (isset($context['params']['dsString'])) {
        $context['params']['dsString'] = $dc;
      }
    }
  }
}