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Drupal modules for browsing and managing Fedora-based digital repositories.
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islandora/CollectionClass.inc

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<?php
/**
* @file
*
* Collection Class Class
*/
if (!defined('PHP_VERSION_ID')) { //XXX: This should go elsewhere
$version = explode('.', PHP_VERSION);
define('PHP_VERSION_ID', ($version[0] * 10000 + $version[1] * 100 + $version[2]));
}
/**
* This CLASS caches the streams so once you call a getstream once it will always return
* the same stream as long as you are using the instance of this class. Cached to
* prevent mutiple hits to fedora. maybe a bit confusing though if this class is used in
* a different context.
*/
class CollectionClass {
public static $COLLECTION_CLASS_COLLECTION_POLICY_STREAM = 'COLLECTION_POLICY';
public static $COLLECTION_CLASS_COLLECTION_VIEW_STREAM = 'COLLECTION_VIEW';
private $contentModelStream = NULL;
private $collectionPolicyStream = NULL;
private $collectionViewStream = NULL;
public $collectionObject = NULL;
/**
* Creates a collection object. Optionally can associate it with a single collection with parameter $pid.
*
* @param string $pid The pid of the collection to represent.
* @return CollectionClass
*/
function __construct($pid = NULL) {
if (!empty($pid)) {
module_load_include('inc', 'fedora_repository', 'ObjectHelper');
$this->collectionObject = new ObjectHelper($pid);
$this->pid = $pid;
}
}
static function get_collection_query($pid) {
if ($query = self::_get_collection_query_from_stream($pid)) {
return $query;
}
else {
return self::_get_default_collection_query($pid);
}
}
static function _get_collection_query_from_stream($pid) {
module_load_include('inc', 'fedora_repository', 'api/fedora_item');
$item = new Fedora_Item($pid);
if ($item->exists() && array_key_exists('QUERY', $item->datastreams)) {
return $item->get_datastream_dissemination('QUERY');
}
else {
return FALSE;
}
}
static function _get_default_collection_query($pid) {
return 'select $object $title $content from <#ri>
where ($object <fedora-model:label> $title
and $object <fedora-model:hasModel> $content
and ($object <fedora-rels-ext:isMemberOfCollection> <info:fedora/' . $pid . '>
or $object <fedora-rels-ext:isMemberOf> <info:fedora/' . $pid . '>)
and $object <fedora-model:state> <info:fedora/fedora-system:def/model#Active>)
minus $content <mulgara:is> <info:fedora/fedora-system:FedoraObject-3.0>
order by $title';
}
/**
* Gets objects related to this object. Must include offset and limit!
*
* Calls self::getRelatedItems() but requires limit and offset.
*
* @param $pid string
* A string containing a Fedora PID.
* @param $limit
* An integer
* @param type $offset
* @param type $itqlquery
* @return type
*/
static function getRelatedObjects($pid, $limit, $offset, $itqlquery=NULL) {
return self::getRelatedItems($pid, $itqlquery, $limit, $offset);
}
/**
* Gets objects related to this item.
*
* Query the resource index using the provided iTQL query. If no query is
* provided, one should be obtained via self::get_collection_query() which
* grabs the child objects.
*
* @param $pid string
* A string containing a PID which may be substituted into the query,
* in place of the %parent_collection% placeholder.
* @param $itqlquery string
* An optional iTQL query.
* @param $limit int
* An optional integer to limit the number of results returned.
* @param int $offset
* An optional integer used to offset the results returned. (Query should
* involve a sort to maintain consistency.
* @return string
* Sparql XML results from the resource index.
*/
static function getRelatedItems($pid, $query_string = NULL, $limit = NULL, $offset = NULL) {
module_load_include('inc', 'fedora_repository', 'ObjectHelper');
module_load_include('inc', 'fedora_repository', 'api/fedora_utils');
if (!fedora_repository_access(OBJECTHELPER :: $OBJECT_HELPER_VIEW_FEDORA, $pid)) {
drupal_set_message(t("You do not have access to Fedora objects within the attempted namespace or access to Fedora denied."), 'error');
return ' ';
}
$objectHelper = new ObjectHelper();
if ($query_string === NULL) {
$query_string = self::get_collection_query($pid);
}
// Replace %parent_collection% with the actual collection PID
$query_string = preg_replace("/\%parent_collection\%/", "<info:fedora/$pid>", $query_string);
$url = variable_get('fedora_repository_url', 'http://localhost:8080/fedora/risearch');
$settings = array(
'type' => 'tuples',
'flush' => TRUE,
'format' => 'Sparql',
'lang' => 'itql',
'stream' => 'on',
'query' => $query_string
);
if ($limit > 0) {
$settings['limit'] = $limit;
}
if ($offset > 0) {
$settings['offset'] = $offset;
}
$url .= '?' . http_build_query($settings, NULL, '&');
$content = do_curl($url);
return $content;
}
/**
* get Collection Policy Stream ?
* @param type $collection_pid
* @return type
*/
function getCollectionPolicyStream($collection_pid) {
if ($this->collectionPolicyStream != NULL) {
return $this->collectionPolicyStream;
}
$this->collectionPolicyStream = $this->getStream($collection_pid, CollectionClass :: $COLLECTION_CLASS_COLLECTION_POLICY_STREAM, 0);
return $this->collectionPolicyStream;
}
/**
* get Relationship element ?
* @param type $collection_pid
* @return type
*/
function getRelationshipElement($collection_pid) {
$stream = $this->getCollectionPolicyStream($collection_pid);
try {
$xml = new SimpleXMLElement($stream);
} catch (Exception $e) {
drupal_set_message(t('Error getting relationship element from policy stream @e', array('@e' => check_plain($e->getMessage()))), 'error');
return;
}
$relationship = $xml->relationship[0];
return $relationship;
}
/**
* get Collection View Stream ?
* @param type $collection_pid
* @return type
*/
function getCollectionViewStream($collection_pid) {
$this->collectionViewStream = $this->getStream($collection_pid, CollectionClass :: $COLLECTION_CLASS_COLLECTION_VIEW_STREAM, 0);
return $this->collectionViewStream;
}
/**
* get Stream ?
* @param type $pid
* @param type $dsid
* @param type $showError
* @return type
*/
function getStream($pid, $dsid, $showError = 1) {
module_load_include('inc', 'fedora_repository', 'api/fedora_item');
$item = new fedora_item($pid);
return isset($item->datastreams[$dsid]) ? $item->get_datastream_dissemination($dsid) : NULL;
}
/**
* get Pid name space ?
* @param type $pid
* @param type $dsid
* @return type
*/
function getPidNameSpace($pid, $dsid) {
$stream = $this->getCollectionPolicyStream($pid);
try {
$xml = new SimpleXMLElement($stream);
} catch (Exception $e) {
drupal_set_message(t('Error getting PID namespace @e', array('@e' => check_plain($e->getMessage()))), 'error');
return;
}
foreach ($xml->contentmodels->contentmodel as $contentModel) {
// $contentModelName=strip_tags($contentModel['name']);
$contentdsid = strip_tags($contentModel->dsid);
if (strtolower($contentdsid) == strtolower($dsid)) {
return strip_tags($contentModel->pid_namespace->asXML());
}
}
drupal_set_message(t('Error getting PID namespace! using collection pid of !pid and content model of !dsid', array('!pid' => $pid, '!dsid' => $dsid)), 'error');
return NULL;
}
/**
* gets a list of content models from a collection policy
* @param type $collection_pid
* @param type $showError
* @return ContentModel
*/
function getContentModels($collection_pid, $showError = TRUE) {
module_load_include('inc', 'Fedora_Repository', 'ContentModel');
$collection_stream = $this->getCollectionPolicyStream($collection_pid);
try {
$xml = new SimpleXMLElement($collection_stream);
} catch (Exception $e) {
if ($showError) {
drupal_set_message(t('@e', array('@e' => check_plain($e->getMessage()))), 'error');
}
return NULL;
}
foreach ($xml->contentmodels->contentmodel as $content_model) {
$contentModel = new ContentModel();
$contentModel->contentModelDsid = $content_model->dsid;
$contentModel->contentModelPid = $content_model->pid;
$contentModel->pidNamespace = $content_model->pidNamespace;
$contentModel->contentModelName = $content_model['name'];
$models[] = $contentModel;
}
return $models;
}
/**
* using the collection policies pid namespace get a new pid by calling fedora' get next pid and appending it to the namespace
* $pid is the $pid of the content model
* $dsid is the datastream id of the content model.
*/
function getNextPid($pid, $dsid) {
module_load_include('inc', 'Fedora_Repository', 'ConnectionHelper');
$pidNameSpace = $this->getPidNameSpace($pid, $dsid);
$pname = substr($pidNameSpace, 0, strpos($pidNameSpace, ":"));
module_load_include('inc', 'fedora_repository', 'api/fedora_item');
return Fedora_Item::get_next_pid_in_namespace($pname);
}
/**
* gets the form handler file, class and method and returns them in an array
*
* @param string $pid The content model PID
* @param string $dsid The content model DSID
* @return array The file, class and method name to handle the ingest form.
*/
function getFormHandler($pid, $dsid) {
$stream = $this->getContentModelStream($pid, $dsid);
try {
$xml = new SimpleXMLElement($stream);
} catch (Exception $e) {
drupal_set_message(t('Error Getting FormHandler: @e', array('@e' => check_plain($e->getMessage()))), 'error');
return NULL;
}
$formHandler = $xml->ingest_form;
if ($formHandler != NULL) {
$handlerDsid = strip_tags($formHandler['dsid']);
$handlerMethod = strip_tags($formHandler->form_builder_method->form_handler->asXML());
$handlerFile = strip_tags($formHandler->form_builder_method->file->asXML());
$handlerClass = strip_tags($formHandler->form_builder_method->class_name->asXML());
$handlerModule = strip_tags($formHandler->form_builder_method->module->asXML());
$returnArray = array();
$returnArray['module'] = $handlerModule;
$returnArray['method'] = $handlerMethod;
$returnArray['class'] = $handlerClass;
$returnArray['file'] = $handlerFile;
return $returnArray;
}
drupal_set_message(t("Error getting form handler. No handler found for !pid - !dsid", array('!pid' => $pid, '!dsid' => $dsid)), 'error');
return NULL;
}
/**
* get Allowed Mime Types
* @param type $contentModelPid
* @param type $contentModel_dsid
* @return type
*/
function getAllowedMimeTypes($contentModelPid, $contentModel_dsid) {
$stream = $this->getContentModelStream($contentModelPid, $contentModel_dsid);
try {
$xml = new SimpleXMLElement($stream);
} catch (Exception $e) {
drupal_set_message(t('Error getting content model stream for mime types @e', array('@e' => check_plain($e->getMessage()))), 'error');
return;
}
foreach ($xml->mimetypes->type as $type) {
$types[] = $type;
}
return $types;
}
/**
* Grabs the rules from the content model stream
* file the file that has been uploaded
*
* @param type $file
* @param type $mimetype
* @param type $pid
* @param type $dsid
* @return type
*/
function getAndDoRules($file, $mimetype, $pid, $dsid) {
if (!user_access('ingest new fedora objects')) {
drupal_set_message(t('You do not have permission to ingest objects.'));
return FALSE;
}
$stream = $this->getContentModelStream($pid, $dsid);
try {
$xml = new SimpleXMLElement($stream);
} catch (Exception $e) {
drupal_set_message(t('Error getting content model stream @e', array('@e' => check_plain($e->getMessage()))), 'error');
return FALSE;
}
foreach ($xml->ingest_rules->rule as $rule) {
foreach ($rule->applies_to as $type) {
if (!strcmp(trim($type), trim($mimetype))) {
$methods = $rule->methods->method;
return $this->callMethods($file, $methods);
}
}
}
}
/**
* calls the methods defined in the content model rules .xml file stored in a Fedora object
*
* @param type $file
* @param type $methods
* @return type
*/
function callMethods($file, $methods) {
foreach ($methods as $method) {
$phpFile = strip_tags($method->file->asXML());
$phpClass = strip_tags($method->class_name->asXML());
$phpMethod = strip_tags($method->method_name->asXML());
$file_ext = strip_tags($method->modified_files_ext->asXML());
$parameters = $method->parameters->parameter;
$dsid = strip_tags($method->datastream_id);
$parametersArray = array();
if (isset($parameters)) {
foreach ($parameters as $parameter) {
$name = strip_tags($parameter['name']);
$value = strip_tags($parameter->asXML());
$parametersArray["$name"] = $value;
}
}
// module_load_include( $phpFile, 'Fedora_Repository', ' ');
require_once(drupal_get_path('module', 'fedora_repository') . '/' . $phpFile);
$thisClass = new $phpClass ();
$returnValue = $thisClass->$phpMethod($parametersArray, $dsid, $file, $file_ext);
if (!$returnValue) {
drupal_set_message(t('Error! Failed running content model method !m !rv', array('!m' => $phpMethod, '!rv' => $returnValue)));
return FALSE;
}
}
return TRUE;
}
/**
* grabs a xml form definition from a content model and builds
* the form using drupals forms api
*
* @param type $form
* @param type $form_state
* @param type $contentModelPid
* @param type $contentModelDsid
* @return type
*/
function build_ingest_form(&$form, &$form_state, $contentModelPid, $contentModelDsid) {
$stream = $this->getContentModelStream($contentModelPid, $contentModelDsid);
try {
$xml = new SimpleXMLElement($stream);
} catch (Exception $e) {
drupal_set_message(t('Error getting ingest form stream @e', array('@e' => check_plain($e->getMessage()))), 'error');
return FALSE;
}
$docRoot = $_SERVER['DOCUMENT_ROOT'];
$file = (isset($form_state['values']['ingest-file-location']) ? $form_state['values']['ingest-file-location'] : '');
// $fullPath = $docRoot . '' . $file;
$fullpath = $file;
// $form = array();
$form['step'] = array(
'#type' => 'hidden',
'#value' => (isset($form_state['values']['step']) ? $form_state['values']['step'] : 0) + 1,
);
$form['ingest-file-location'] = array(
'#type' => 'hidden',
'#value' => $file,
);
$form['content_model_name'] = array(
'#type' => 'hidden',
'#value' => $contentModelDsid
);
$form['models'] = array(//content models available
'#type' => 'hidden',
'#value' => $form_state['values']['models'],
);
$form['fullpath'] = array(
'#type' => 'hidden',
'#value' => $fullpath,
);
$form['#attributes']['enctype'] = 'multipart/form-data';
$form['indicator']['ingest-file-location'] = array(
'#type' => 'file',
'#title' => t('Upload Document'),
'#size' => 48,
'#description' => t('Full text'),
);
if ($xml->ingest_form->hide_file_chooser == 'TRUE') {
$form['indicator']['ingest-file-location']['#type'] = 'hidden';
}
$ingest_form = $xml->ingest_form; //should only be one
$drupal_module = strip_tags($ingest_form->form_builder_method->module->asXML());
if (empty($drupal_module)) {
$drupal_module = 'fedora_repository';
}
$phpFile = strip_tags($ingest_form->form_builder_method->file->asXML());
$phpClass = strip_tags($ingest_form->form_builder_method->class_name->asXML());
$phpMethod = strip_tags($ingest_form->form_builder_method->method_name->asXML());
$dsid = strip_tags($ingest_form['dsid']);
// module_load_include('php', 'Fedora_Repository', $phpFile);
require_once(drupal_get_path('module', $drupal_module) . '/' . $phpFile);
$thisClass = new $phpClass ();
return $thisClass->$phpMethod($form, $ingest_form, $form_state['values'], $form_state);
}
/**
* this will also create a personal collection for an existing user if they don't have one
* not using this function currently
*
* @param type $user
* @return type
*/
function createUserCollection(& $user) {
if (isset($user->fedora_personal_pid)) {
return;
}
$username = array(
'name' => variable_get('fedora_admin_user', 'fedoraAdmin')
);
$admin_user = user_load($username);
module_load_include('inc', 'fedora_repository', 'ConnectionHelper');
$connectionHelper = new ConnectionHelper();
try {
$soapClient = $connectionHelper->getSoapClient(variable_get('fedora_soap_manage_url', 'http://localhost:8080/fedora/wsdl?api=API-M'));
$pidNameSpace = variable_get('fedora_repository_pid', 'vre:');
$pidNameSpace = substr($pidNameSpace, 0, strpos($pidNameSpace, ":"));
$params = array(
'numPIDs' => '',
'pidNamespace' => $pidNameSpace
);
$object = $soapClient->__soapCall('getNextPID', array(
$params
));
} catch (exception $e) {
drupal_set_message(t('Error getting Next PID: @e', array('@e' => check_plain($e->getMessage()))), 'error');
return FALSE;
}
$pid = implode(get_object_vars($object));
$pidNumber = strstr($pid, ":");
$pid = $pidNameSpace . ':' . 'USER-' . $user->name . '-' . substr($pidNumber, 1);
$personal_collection_pid = array(
'fedora_personal_pid' => $pid
);
module_load_include('inc', 'fedora_repository', 'plugins/PersonalCollectionClass');
$personalCollectionClass = new PersonalCollectionClass();
if (!$personalCollectionClass->createCollection($user, $pid, $soapClient)) {
drupal_set_message(t("Did not create a personal collection object for !u", array('!u' => $user->name)));
return FALSE; //creation failed don't save the collection pid in drupal db
}
user_save($user, $personal_collection_pid);
return TRUE;
}
/**
* Queries a collection object for an xslt to format how the
* collection of objects is displayed.
*
* @param type $pid
* @param type $path
* @param type $canUseDefault
* @return type
*/
function getXslContent($pid, $path, $canUseDefault = TRUE) {
module_load_include('inc', 'fedora_repository', 'CollectionClass');
$collectionClass = new CollectionClass();
$xslContent = $collectionClass->getCollectionViewStream($pid);
//If there's no XSLT from the object, then check if the one which used to exist, does...
if (!$xslContent && $canUseDefault && file_exists($path . '/xsl/sparql_to_html.xsl')) {
$xslContent = file_get_contents($path . '/xsl/sparql_to_html.xsl');
}
return $xslContent;
}
/**
* show field sets ?
* @global type $base_url
* @global type $user
* @param type $page_number
* @return string
*/
function showFieldSets($page_number) {
module_load_include('inc', 'fedora_repository', 'api/fedora_item');
module_load_include('inc', 'fedora_repository', 'CollectionPolicy');
//module_load_include('inc', 'fedora_repository', 'BatchIngest'); //Legacy code?
global $base_url;
global $user;
$tabset = array();
$query = NULL;
$item = new Fedora_Item($this->pid);
if ($item->exists() && array_key_exists('QUERY', $item->datastreams)) {
$query = $item->get_datastream_dissemination('QUERY');
}
$results = $this->getRelatedItems($this->pid, $query);
$collection_items = $this->renderCollection($results, $this->pid, NULL, NULL, $page_number);
$show_batch_tab = FALSE;
$policy = CollectionPolicy::loadFromCollection($this->pid, TRUE);
if (!empty($policy)) {
$content_models = $policy->getContentModels();
}
if (count($content_models) == 1 && $content_models[0]->pid == "islandora:collectionCModel") {
$show_batch_tab = FALSE;
}
// Check the form post to see if we are in the middle of an ingest operation.
$add_selected = ((!empty($_POST['form_id']) && $_POST['form_id'] == 'fedora_repository_ingest_form') || !$collection_items);
$view_selected = !$add_selected;
$tabset['view_tab'] = array(
'#type' => 'tabpage',
'#title' => t('View'),
'#selected' => $view_selected,
'#content' => $collection_items,
'#tab_name' => 'view-tab',
);
$add_to_collection = $this->getIngestInterface();
if (!empty($add_to_collection)) {
$tabset['add_tab'] = array(
'#type' => 'tabpage',
'#title' => t('Add'),
'#selected' => $add_selected,
// This will be the content of the tab.
'#content' => $add_to_collection,
'#tab_name' => 'add-tab',
);
}
return $tabset;
}
/**
* get Ingest Interface ??
* @global type $base_url
* @return string
*/
function getIngestInterface() {
global $base_url;
$objectHelper = new ObjectHelper();
module_load_include('inc', 'Fedora_Repository', 'CollectionPolicy');
$collectionPolicyExists = $objectHelper->getMimeType($this->pid, CollectionPolicy::getDefaultDSID());
if (user_access(ObjectHelper :: $INGEST_FEDORA_OBJECTS) && $collectionPolicyExists) {
if (!empty($collectionPolicyExists)) {
$allow = TRUE;
if (module_exists('fedora_fesl')) {
$allow = fedora_fesl_check_roles($this->pid, 'write');
}
if ($allow) {
$ingestObject = drupal_get_form('fedora_repository_ingest_form', $this->pid);
}
}
}
else {
$ingestObject = '';
}
return $ingestObject;
}
/**
* Unfortunate function, I know...
*
* Does just what it says: Hacks the default Drupal pager such that it might
* be rendered.
*/
protected static function _hack_pager($pager_name, $per_page, $total_items) {
global $pager_total, $pager_page_array;
$pager_total[$pager_name] = ceil($total_items / $per_page);
$page_info = explode(',', isset($_GET['page']) ? $_GET['page'] : '');
$page = $page_info[$pager_name];
if ($page < 0) {
$page = 0;
}
if (!isset($pager_page_array)) {
$pager_page_array = pager_load_array($page, $pager_name, $page_info);
}
else {
$pager_page_array = pager_load_array($page, $pager_name, $pager_page_array);
}
$page = $pager_page_array[$pager_name];
return $page;
}
/**
* render collection
* @global type $base_url
* @param type $content
* @param type $pid
* @param type $dsId
* @param type $collection
* @param int $pageNumber
* @return type
*/
function renderCollection($content, $pid, $dsId, $collectionName, $pageNumber = NULL) {
$path = drupal_get_path('module', 'fedora_repository');
global $base_url;
$collection_pid = $pid; //we will be changing the pid later maybe
$objectHelper = new ObjectHelper();
$parsedContent = NULL;
$contentModels = $objectHelper->get_content_models_list($pid);
$isCollection = FALSE;
//if this is a collection object store the $pid in the session as it will come in handy
//after a purge or ingest to return to the correct collection.
$fedoraItem = NULL;
if (empty($collectionName)) {
$collectionName = menu_get_active_title();
}
$xslContent = $this->getXslContent($pid, $path);
$objectList = '';
if (isset($content) && $content != FALSE) {
if (!$xslContent) { //Didn't find an XSLT.
module_load_include('inc', 'fedora_repository', 'ObjectHelper');
$intermediate_results = ObjectHelper::parse_sparql_results($content);
unset($content);
$per_page = 20; //XXX: Make this configurable.
$pager_name = 0;
$total = count($intermediate_results);
$pager_page = self::_hack_pager($pager_name, $per_page, $total);
$results = array();
foreach (array_slice($intermediate_results, $per_page * $pager_page, $per_page) as $result) {
$title = $result['title'];
$obj_path = "fedora/repository/{$result['object']}";
$thumbnail = theme('image', "$obj_path/TN", $title, $title, array(), FALSE);
$results[] = array(
array(
'data' => l($thumbnail, $obj_path, array(
'html' => TRUE,
)),
),
array(
'data' => l($title, $obj_path),
),
);
}
if (!$results) {
drupal_set_message(t("No objects in this collection (or bad query)."));
}
else {
$first = $per_page * $pager_page;
$last = (($total - $first) > $per_page)?
($first + $per_page):
$total;
$objectList = '<h3>' . t('Results @first to @last of @total', array(
'@first' => $first + 1,
'@last' => $last,
'@total' => $total,
)) . '</h3>';
$objectList .= theme('pager', array(), $per_page, $pager_name);
$objectList .= theme('table', NULL, $results);
$objectList .= theme('pager', array(), $per_page, $pager_name);
}
}
else {
if (!$pageNumber) {
$pageNumber = 1;
}
//get collection list and display using xslt-------------------------------------------
$input = new DomDocument();
$input->loadXML(trim($content));
$results = $input->getElementsByTagName('result');
if ($results->length > 0) {
try {
$proc = new XsltProcessor();
$options = array( //Could make this the return of a hook?
'collectionPid' => $collection_pid,
'collectionTitle' => $collectionName,
'baseUrl' => $base_url,
'path' => "$base_url/$path",
'hitPage' => $pageNumber,
);
if (defined('PHP_VERSION_ID') && PHP_VERSION_ID >= 50100) {
$proc->setParameter('', $options);
}
else {
foreach ($options as $name => $value) {
$proc->setParameter('', $name, $value);
}
}
$proc->registerPHPFunctions();
$xsl = new DomDocument();
$xsl->loadXML($xslContent);
// php xsl does not seem to work with namespaces so removing it below
// I may have just been being stupid here
// $content = str_ireplace('xmlns="http://www.w3.org/2001/sw/DataAccess/rf1/result"', '', $content);
$xsl = $proc->importStylesheet($xsl);
$newdom = $proc->transformToDoc($input);
$objectList = $newdom->saveHTML(); //is the xml transformed to html as defined in the xslt associated with the collection object
if (!$objectList) {
throw new Exception("Invalid XML.");
}
} catch (Exception $e) {
drupal_set_message(check_plain($e->getMessage()), 'error');
return '';
}
}
}
}
else {
drupal_set_message(t("No objects in this collection (or bad query)."));
}
return $objectList;
}
}