Drupal modules for browsing and managing Fedora-based digital repositories.
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<?php
/**
* @file
* This file contains the classes for parsing the collection policy infomration.
*/
/**
* Collection Policy class
*/
class CollectionPolicy {
/**
* Constructor
* NOTE: Use the static constructor methods whenever possible.
*
* @param string $xmlStr
* The COLLECTION_POLICY in string form
*
* @return CollectionPolicy
* The parsed collection policy.
*/
public function __construct($xml_string) {
$this->xml = new DOMDocument();
$this->xml->loadXML($xml_string);
$this->name = 'Collection Policy';
}
/**
* Gets the name of the relationship to use
* for members of this collection.
* Returns FALSE on failure.
*
* @return string $relationship
*/
public function getRelationship() {
$ret = trim($this->xml->getElementsByTagName('relationship')->item(0)->nodeValue);
return $ret;
}
/**
* Sets the name of the relationship to use
* for members of this collection.
* Returns FALSE on failure.
*
* @param string $relationship
* @return boolean $ret
*/
public function setRelationship($relationship) {
$ret = FALSE;
if ($this->validate()) {
$relationshipEl = $this->xml->getElementsByTagName('relationship')->item(0);
$relationshipEl->nodeValue = trim($relationship);
$ret = TRUE;
}
return $ret;
}
/**
* Gets a list of ContentModel objects supported by this collection.
*
* @return ContentModel[] $models
*/
function getContentModels() {
$ret = array();
$content_models = $this->xml->getElementsByTagName('content_models')->item(0)->getElementsByTagName('content_model');
for ($i = 0; $i < $content_models->length; $i++) {
$cm = array();
$cm['pid'] = $content_models->item($i)->getAttribute('pid');
$cm['namespace'] = $content_models->item($i)->getAttribute('namespace');
$cm['name'] = $content_models->item($i)->getAttribute('name');
if ($cm !== FALSE) {
$ret[] = $cm;
}
}
return $ret;
}
/**
* Removes the specified content model from the collection policy. This will only
* prevent future ingests of the removed model to the collection. $cm should be
* a valid ContentModel object. Returns FALSE on failure or when the CM was not found in
* the collection policy.
*
* @param ContentModel $cm
* @return boolean $valid
*/
function removeModel($cm) {
$ret = FALSE;
if ($this->validate() && $cm->validate()) {
$contentmodelsEl = $this->xml->getElementsByTagName('content_models');
$models = $contentmodelsEl->item(0)->getElementsByTagName('content_model');
$found = FALSE;
for ($i = 0; $found === FALSE && $i < $models->length; $i++) {
if ($models->item($i)->getAttribute('pid') == $cm->pid) {
$found = $models->item($i);
}
}
if ($found !== FALSE && $models->length > 1) {
$contentmodelsEl->item(0)->removeChild($found);
$ret = TRUE;
}
}
return $ret;
}
/**
* addModel ??
* @param ContentModel $cm
* @param type $namespace
* @return type
*/
function addModel($cm, $namespace) {
$ret = FALSE;
// var_dump(self::valid_pid($namespace));
// var_dump($this->validate());
// var_dump($cm->validate());
// if (self::valid_pid($namespace) && $this->validate() && $cm->validate()) {
$contentmodelsEl = $this->xml->getElementsByTagName('content_models');
$models = $contentmodelsEl->item(0)->getElementsByTagName('content_model');
$found = FALSE;
// for ($i = 0; !$found && $i < $models->length; $i++) {
// if ($models->item($i)->getAttribute('pid') == $cm->pid)
// $found = TRUE;
// }
// if (!$found) {
$cmEl = $this->xml->createElement('content_model');
$cmEl->setAttribute('name', $cm->name);
$cmEl->setAttribute('dsid', $cm->dsid);
$cmEl->setAttribute('namespace', $namespace);
$cmEl->setAttribute('pid', $cm->pid);
$contentmodelsEl->item(0)->appendChild($cmEl);
// }
$ret = !$found;
// }
return $ret;
}
/**
* getName ??
* @return type
*/
function getName() {
$ret = FALSE;
if ($this->validate()) {
$ret = $this->xml->getElementsByTagName('collection_policy')->item(0)->getAttribute('name');
}
return $ret;
}
}