public function __construct(array $params, $mainEntity)
{
$this->at = RestUrlParams::parseTimestamp(RestUrlParams::extractValue($params, RestUrlParams::AT));
if ($this->at == RestUrlParams::ALL_TIMES) {
$this->at = self::ALL_TIMES;
}
$this->published = RestUrlParams::parseBoolean(RestUrlParams::extractValue($params, RestUrlParams::PUBLISHED));
$this->queryParamsMap = array();
$this->scopeMap = array();
if ($mainEntity != NULL) {
foreach ($params as $paramName => $paramValue) {
// Parameters can be specified with or without entity-prefix, e.g. 'entity/property=value' or just
// 'property=value'. Check if an entity-prefix is provided.
$entityName = NULL;
$propertyName = NULL;
$paramNameParts = explode(RestUrlParams::ENTITY_SEPARATOR, $paramName);
if (count($paramNameParts) == 1) {
// It's like 'property=value'.
$entityName = $mainEntity->getName();
$propertyName = $paramName;
} else {
if (count($paramNameParts) == 2) {
// It's like 'entity/property=value'.
$entityName = $paramNameParts[0];
$propertyName = $paramNameParts[1];
} else {
throw new Exception("Illegal query parameter '{$paramName}'.");
}
}
// If it's a scope parameter...
if (strcasecmp($propertyName, RestUrlParams::SCOPE) == 0) {
// ...then parse it.
$this->scopeMap[$entityName] = Scope::parseValue($paramValue);
} else {
// ...else add the value to the map at the correct entity-entry.
if (!array_key_exists($entityName, $this->queryParamsMap)) {
$this->queryParamsMap[$entityName] = array();
}
// If $paramName is 'id'...
if (strcasecmp($propertyName, RestUrlParams::ID) == 0) {
// ...then check if this is allowed for the given entity...
if (!$mainEntity->isObjectEntity()) {
throw new Exception("Cannot fetch entity '" . $mainEntity->getName() . "' by id.");
}
// ...and apply the correct property name and value.
$propertyName = $mainEntity->getObjectIdColumnName();
$paramValue = explode(RestUrlParams::ID_SEPARATOR, $paramValue);
}
$this->queryParamsMap[$entityName][$propertyName] = $paramValue;
}
}
}
}
public static function isFetchParam($paramName)
{
if (self::$FETCH_PARAM_NAMES == NULL) {
self::$FETCH_PARAM_NAMES = array(self::AT, self::PUBLISHED, self::SCOPE, self::SKIP_BINARIES, self::ID);
}
foreach (self::$FETCH_PARAM_NAMES as $validParamName) {
if (strcasecmp($paramName, $validParamName) == 0) {
return TRUE;
}
}
return FALSE;
}
/**
* Fetches a single object of the given entity and id, applying the query parameters to limit the resultset.
* The fetched data is added as the root element of the given XML document.
*
* @param Entity $entity
* @param type $id
* @param array $params
* @params Scope $scope
* @params DOMDocument $domDoc
* @params $skipBinaries
* @return DOMElement with requested data or NULL if not found
*/
public function getObjectTree(Entity $entity, $id, array $params, DOMDocument $domDoc)
{
$scope = Scope::parseValue(RestUrlParams::extractValue($params, RestUrlParams::SCOPE));
$skipBinaries = RestUrlParams::parseBoolean(RestUrlParams::extractValue($params, RestUrlParams::SKIP_BINARIES));
$queryContext = new QueryContext($params, $entity);
$xmlElementsWithState = array();
$this->fetchObjects($entity, $id, $queryContext, $scope, $skipBinaries, $domDoc, $domDoc, $xmlElementsWithState);
$xmlResult = $domDoc->documentElement;
if ($xmlResult != NULL) {
$this->setLifecycleTimestamps($xmlElementsWithState);
$this->setTimestamp($xmlResult, XmlConstants::AT, $queryContext->getParameterAt());
}
return $xmlResult;
}
private function processQueryParams(Schema $schema, $mainEntity)
{
// Get rid of any 'PHPSESSION' and cookie params.
RestUrlParams::extractValue($this->params, session_name());
// Create/restore the temporaryIdMap.
$storedTemporaryIds = NULL;
if (isset($_SESSION[$this->sessionId])) {
$storedTemporaryIds = TemporaryIdMap::deserializeTemporaryIds($schema, $_SESSION[$this->sessionId]);
}
$this->temporaryIdMap = new TemporaryIdMap($storedTemporaryIds);
// Validate that prefixed parameters refer to existing entities.
foreach ($this->params as $paramName => &$paramValue) {
if (RestUrlParams::isFetchParam($paramName)) {
continue;
}
$paramNameParts = explode(RestUrlParams::ENTITY_SEPARATOR, $paramName);
$entity = NULL;
$queryParam = NULL;
if (count($paramNameParts) == 1) {
if ($mainEntity == NULL) {
// error_log("Ignoring unknown query parameter: '$paramName=$paramValue'.");
unset($this->params[$paramName]);
continue;
}
$entity = $mainEntity;
$queryParam = $paramNameParts[0];
} else {
// Check if the specified entity exists.
$entity = $schema->getObjectEntity($paramNameParts[0], false);
if ($entity == NULL) {
throw new Exception("Unknown entity '{$paramNameParts['0']}' in query parameters.", RestResponse::CLIENT_ERROR);
}
$queryParam = $paramNameParts[1];
}
// If one or more ID's are specified...
if (strcasecmp($queryParam, RestUrlParams::ID) == 0) {
// ...then substitute any temporary ID with its persisted counterpart.
$persistedIds = array();
foreach (explode(RestUrlParams::ID_SEPARATOR, $paramValue) as $id) {
$persistedIds[] = $this->temporaryIdMap->getPersistedId($entity, $id);
}
$paramValue = implode(RestUrlParams::ID_SEPARATOR, $persistedIds);
}
}
}
