array(), 'dc:creator' => array(), 'dc:subject' => array(), 'dc:description' => array(), 'dc:publisher' => array(), 'dc:contributor' => array(), 'dc:date' => array(), 'dc:type' => array(), 'dc:format' => array(), 'dc:identifier' => array(), 'dc:source' => array(), 'dc:language' => array(), 'dc:relation' => array(), 'dc:coverage' => array(), 'dc:rights' => array(), ); public $owner; /** * Constructor. * * @param string $dc_xml * The Dublin Core XML. */ public function __construct($dc_xml = NULL) { if (!empty($dc_xml)) { $this->dc = self::importFromXMLString($dc_xml); } } /** * Add an element. * * @param string $element_name * The name of the element to add. * @param string $value * The value of the element to add. */ public function addElement($element_name, $value) { if (is_string($value) && is_array($this->dc[$element_name])) { $this->dc[$element_name][] = $value; } } /** * Replace the given DC element with the given values. * * @param string $element_name * The name of the elements to set. * @param mixed $values * The values of the set the elements too. */ public function setElement($element_name, $values) { if (is_array($values)) { $this->dc[$element_name] = $values; } elseif (is_string($values)) { $this->dc[$element_name] = array($values); } } /** * Serialize this object as an XML string. * * @return string * The serialized XML. */ public function asXML() { $dc_xml = new DomDocument(); $oai_dc = $dc_xml->createElementNS('http://www.openarchives.org/OAI/2.0/oai_dc/', 'oai_dc:dc'); $oai_dc->setAttribute('xmlns:dc', 'http://purl.org/dc/elements/1.1/'); foreach ($this->dc as $dc_element => $values) { if (is_array($values) && !empty($values)) { foreach ($values as $value) { $new_item = $dc_xml->createElement($dc_element, $value); $oai_dc->appendChild($new_item); } } else { $new_item = $dc_xml->createElement($dc_element); $oai_dc->appendChild($new_item); } } $dc_xml->appendChild($oai_dc); return $dc_xml->saveXML(); } /** * Serializes this object as an array. * * @return array * The serialized object. */ public function asArray() { $dc_array = array(); foreach ($this as $element) { if (!empty($element)) { foreach ($element as $field => $values) { // Split value if the result value is an array. if (is_array($values)) { $value = ''; $i = 0; foreach ($values as $piece) { if (!empty($piece)) { if ($i++) { $value .= ", "; } $value .= $piece; } } } else { $value = $values; } $dc_label = explode(':', $field); $element_label = drupal_ucfirst($dc_label[1]); $dc_array[$field]['label'] = $element_label; $dc_array[$field]['value'] = $value; $dc_array[$field]['class'] = drupal_strtolower(preg_replace('/[^A-Za-z0-9]/', '-', $field)); $dc_array[$field]['dcterms'] = preg_replace('/^dc/', 'dcterms', $field); } } } return $dc_array; } /** * Creates a new instance of the class by parsing dc_xml. * * @param string $dc_xml * Dublin Core XML. * * @return DublinCore * The instantiated object. */ public static function importFromXMLString($dc_xml) { $dc_doc = new DomDocument(); if (!empty($dc_xml) && $dc_doc->loadXML($dc_xml)) { $oai_dc = $dc_doc->getElementsByTagNameNS('http://purl.org/dc/elements/1.1/', '*'); $new_dc = new DublinCore(); foreach ($oai_dc as $child) { if (isset($new_dc->dc[$child->nodeName])) { array_push($new_dc->dc[$child->nodeName], $child->nodeValue); } } return $new_dc; } return NULL; } }