/drupal7/includes/entity.inc - Club Drupal - Forge Centrale Marseille

root / drupal7 / includes / entity.inc @ d3889c60

       <?php
       /**
        * Interface for entity controller classes.
+       *
        * All entity controller classes specified via the 'controller class' key
        * returned by hook_entity_info() or hook_entity_info_alter() have to implement
        * this interface.
+       *
        * Most simple, SQL-based entity controllers will do better by extending
        * DrupalDefaultEntityController instead of implementing this interface
        * directly.
        */
       interface DrupalEntityControllerInterface {
         /**
          * Resets the internal, static entity cache.
+         *
          * @param $ids
          *   (optional) If specified, the cache is reset for the entities with the
          *   given ids only.
          */
         public function resetCache(array $ids = NULL);
         /**
          * Loads one or more entities.
+         *
          * @param $ids
          *   An array of entity IDs, or FALSE to load all entities.
          * @param $conditions
          *   An array of conditions. Keys are field names on the entity's base table.
          *   Values will be compared for equality. All the comparisons will be ANDed
          *   together. This parameter is deprecated; use an EntityFieldQuery instead.
+         *
          * @return
          *   An array of entity objects indexed by their ids. When no results are
          *   found, an empty array is returned.
          */
         public function load($ids = array(), $conditions = array());
+      }
       /**
        * Default implementation of DrupalEntityControllerInterface.
+       *
        * This class can be used as-is by most simple entity types. Entity types
        * requiring special handling can extend the class.
        */
       class DrupalDefaultEntityController implements DrupalEntityControllerInterface {
         /**
          * Static cache of entities, keyed by entity ID.
+         *
          * @var array
          */
         protected $entityCache;
         /**
          * Entity type for this controller instance.
+         *
          * @var string
          */
         protected $entityType;
         /**
          * Array of information about the entity.
+         *
          * @var array
+         *
          * @see entity_get_info()
          */
         protected $entityInfo;
         /**
          * Additional arguments to pass to hook_TYPE_load().
+         *
          * Set before calling DrupalDefaultEntityController::attachLoad().
+         *
          * @var array
          */
         protected $hookLoadArguments;
         /**
          * Name of the entity's ID field in the entity database table.
+         *
          * @var string
          */
         protected $idKey;
         /**
          * Name of entity's revision database table field, if it supports revisions.
+         *
          * Has the value FALSE if this entity does not use revisions.
+         *
          * @var string
          */
         protected $revisionKey;
         /**
          * The table that stores revisions, if the entity supports revisions.
+         *
          * @var string
          */
         protected $revisionTable;
         /**
          * Whether this entity type should use the static cache.
+         *
          * Set by entity info.
+         *
          * @var boolean
          */
         protected $cache;
         /**
          * Constructor: sets basic variables.
+         *
          * @param $entityType
          *   The entity type for which the instance is created.
          */
         public function __construct($entityType) {
           $this->entityType = $entityType;
           $this->entityInfo = entity_get_info($entityType);
           $this->entityCache = array();
           $this->hookLoadArguments = array();
           $this->idKey = $this->entityInfo['entity keys']['id'];
           // Check if the entity type supports revisions.
           if (!empty($this->entityInfo['entity keys']['revision'])) {
             $this->revisionKey = $this->entityInfo['entity keys']['revision'];
             $this->revisionTable = $this->entityInfo['revision table'];
+          }
           else {
             $this->revisionKey = FALSE;
+          }
           // Check if the entity type supports static caching of loaded entities.
           $this->cache = !empty($this->entityInfo['static cache']);
+        }
         /**
          * Implements DrupalEntityControllerInterface::resetCache().
          */
         public function resetCache(array $ids = NULL) {
           if (isset($ids)) {
             foreach ($ids as $id) {
               unset($this->entityCache[$id]);
+            }
+          }
           else {
             $this->entityCache = array();
+          }
+        }
         /**
          * Implements DrupalEntityControllerInterface::load().
          */
         public function load($ids = array(), $conditions = array()) {
           $entities = array();
           // Revisions are not statically cached, and require a different query to
           // other conditions, so separate the revision id into its own variable.
           if ($this->revisionKey && isset($conditions[$this->revisionKey])) {
             $revision_id = $conditions[$this->revisionKey];
             unset($conditions[$this->revisionKey]);
+          }
           else {
             $revision_id = FALSE;
+          }
           // Create a new variable which is either a prepared version of the $ids
           // array for later comparison with the entity cache, or FALSE if no $ids
           // were passed. The $ids array is reduced as items are loaded from cache,
           // and we need to know if it's empty for this reason to avoid querying the
           // database when all requested entities are loaded from cache.
           $passed_ids = !empty($ids) ? array_flip($ids) : FALSE;
           // Try to load entities from the static cache, if the entity type supports
           // static caching.
           if ($this->cache && !$revision_id) {
             $entities += $this->cacheGet($ids, $conditions);
             // If any entities were loaded, remove them from the ids still to load.
             if ($passed_ids) {
               $ids = array_keys(array_diff_key($passed_ids, $entities));
+            }
+          }
           // Load any remaining entities from the database. This is the case if $ids
           // is set to FALSE (so we load all entities), if there are any ids left to
           // load, if loading a revision, or if $conditions was passed without $ids.
           if ($ids === FALSE || $ids || $revision_id || ($conditions && !$passed_ids)) {
             // Build the query.
             $query = $this->buildQuery($ids, $conditions, $revision_id);
             $queried_entities = $query
               ->execute()
               ->fetchAllAssoc($this->idKey);
+          }
           // Pass all entities loaded from the database through $this->attachLoad(),
           // which attaches fields (if supported by the entity type) and calls the
           // entity type specific load callback, for example hook_node_load().
           if (!empty($queried_entities)) {
             $this->attachLoad($queried_entities, $revision_id);
             $entities += $queried_entities;
+          }
           if ($this->cache) {
             // Add entities to the cache if we are not loading a revision.
             if (!empty($queried_entities) && !$revision_id) {
               $this->cacheSet($queried_entities);
+            }
+          }
           // Ensure that the returned array is ordered the same as the original
           // $ids array if this was passed in and remove any invalid ids.
           if ($passed_ids) {
             // Remove any invalid ids from the array.
             $passed_ids = array_intersect_key($passed_ids, $entities);
             foreach ($entities as $entity) {
               $passed_ids[$entity->{$this->idKey}] = $entity;
+            }
             $entities = $passed_ids;
+          }
           return $entities;
+        }
         /**
          * Builds the query to load the entity.
+         *
          * This has full revision support. For entities requiring special queries,
          * the class can be extended, and the default query can be constructed by
          * calling parent::buildQuery(). This is usually necessary when the object
          * being loaded needs to be augmented with additional data from another
          * table, such as loading node type into comments or vocabulary machine name
          * into terms, however it can also support $conditions on different tables.
          * See CommentController::buildQuery() or TaxonomyTermController::buildQuery()
          * for examples.
+         *
          * @param $ids
          *   An array of entity IDs, or FALSE to load all entities.
          * @param $conditions
          *   An array of conditions. Keys are field names on the entity's base table.
          *   Values will be compared for equality. All the comparisons will be ANDed
          *   together. This parameter is deprecated; use an EntityFieldQuery instead.
          * @param $revision_id
          *   The ID of the revision to load, or FALSE if this query is asking for the
          *   most current revision(s).
+         *
          * @return SelectQuery
          *   A SelectQuery object for loading the entity.
          */
         protected function buildQuery($ids, $conditions = array(), $revision_id = FALSE) {
           $query = db_select($this->entityInfo['base table'], 'base');
           $query->addTag($this->entityType . '_load_multiple');
           if ($revision_id) {
             $query->join($this->revisionTable, 'revision', "revision.{$this->idKey} = base.{$this->idKey} AND revision.{$this->revisionKey} = :revisionId", array(':revisionId' => $revision_id));
+          }
           elseif ($this->revisionKey) {
             $query->join($this->revisionTable, 'revision', "revision.{$this->revisionKey} = base.{$this->revisionKey}");
+          }
           // Add fields from the {entity} table.
           $entity_fields = $this->entityInfo['schema_fields_sql']['base table'];
           if ($this->revisionKey) {
             // Add all fields from the {entity_revision} table.
             $entity_revision_fields = drupal_map_assoc($this->entityInfo['schema_fields_sql']['revision table']);
             // The id field is provided by entity, so remove it.
             unset($entity_revision_fields[$this->idKey]);
             // Remove all fields from the base table that are also fields by the same
             // name in the revision table.
             $entity_field_keys = array_flip($entity_fields);
             foreach ($entity_revision_fields as $key => $name) {
               if (isset($entity_field_keys[$name])) {
                 unset($entity_fields[$entity_field_keys[$name]]);
+              }
+            }
             $query->fields('revision', $entity_revision_fields);
+          }
           $query->fields('base', $entity_fields);
           if ($ids) {
             $query->condition("base.{$this->idKey}", $ids, 'IN');
+          }
           if ($conditions) {
             foreach ($conditions as $field => $value) {
               $query->condition('base.' . $field, $value);
+            }
+          }
           return $query;
+        }
         /**
          * Attaches data to entities upon loading.
+         *
          * This will attach fields, if the entity is fieldable. It calls
          * hook_entity_load() for modules which need to add data to all entities.
          * It also calls hook_TYPE_load() on the loaded entities. For example
          * hook_node_load() or hook_user_load(). If your hook_TYPE_load()
          * expects special parameters apart from the queried entities, you can set
          * $this->hookLoadArguments prior to calling the method.
          * See NodeController::attachLoad() for an example.
+         *
          * @param $queried_entities
          *   Associative array of query results, keyed on the entity ID.
          * @param $revision_id
          *   ID of the revision that was loaded, or FALSE if the most current revision
          *   was loaded.
          */
         protected function attachLoad(&$queried_entities, $revision_id = FALSE) {
           // Attach fields.
           if ($this->entityInfo['fieldable']) {
             if ($revision_id) {
               field_attach_load_revision($this->entityType, $queried_entities);
+            }
             else {
               field_attach_load($this->entityType, $queried_entities);
+            }
+          }
           // Call hook_entity_load().
           foreach (module_implements('entity_load') as $module) {
             $function = $module . '_entity_load';
             $function($queried_entities, $this->entityType);
+          }
           // Call hook_TYPE_load(). The first argument for hook_TYPE_load() are
           // always the queried entities, followed by additional arguments set in
           // $this->hookLoadArguments.
           $args = array_merge(array($queried_entities), $this->hookLoadArguments);
           foreach (module_implements($this->entityInfo['load hook']) as $module) {
             call_user_func_array($module . '_' . $this->entityInfo['load hook'], $args);
+          }
+        }
         /**
          * Gets entities from the static cache.
+         *
          * @param $ids
          *   If not empty, return entities that match these IDs.
          * @param $conditions
          *   If set, return entities that match all of these conditions.
+         *
          * @return
          *   Array of entities from the entity cache.
          */
         protected function cacheGet($ids, $conditions = array()) {
           $entities = array();
           // Load any available entities from the internal cache.
           if (!empty($this->entityCache)) {
             if ($ids) {
               $entities += array_intersect_key($this->entityCache, array_flip($ids));
+            }
             // If loading entities only by conditions, fetch all available entities
             // from the cache. Entities which don't match are removed later.
             elseif ($conditions) {
               $entities = $this->entityCache;
+            }
+          }
           // Exclude any entities loaded from cache if they don't match $conditions.
           // This ensures the same behavior whether loading from memory or database.
           if ($conditions) {
             foreach ($entities as $entity) {
               // Iterate over all conditions and compare them to the entity
               // properties. We cannot use array_diff_assoc() here since the
               // conditions can be nested arrays, too.
               foreach ($conditions as $property_name => $condition) {
                 if (is_array($condition)) {
                   // Multiple condition values for one property are treated as OR
                   // operation: only if the value is not at all in the condition array
                   // we remove the entity.
                   if (!in_array($entity->{$property_name}, $condition)) {
                     unset($entities[$entity->{$this->idKey}]);
                     continue 2;
+                  }
+                }
                 elseif ($condition != $entity->{$property_name}) {
                   unset($entities[$entity->{$this->idKey}]);
                   continue 2;
+                }
+              }
+            }
+          }
           return $entities;
+        }
         /**
          * Stores entities in the static entity cache.
+         *
          * @param $entities
          *   Entities to store in the cache.
          */
         protected function cacheSet($entities) {
           $this->entityCache += $entities;
+        }
+      }
       /**
        * Exception thrown by EntityFieldQuery() on unsupported query syntax.
+       *
        * Some storage modules might not support the full range of the syntax for
        * conditions, and will raise an EntityFieldQueryException when an unsupported
        * condition was specified.
        */
       class EntityFieldQueryException extends Exception {}
       /**
        * Retrieves entities matching a given set of conditions.
+       *
        * This class allows finding entities based on entity properties (for example,
        * node->changed), field values, and generic entity meta data (bundle,
        * entity type, entity id, and revision ID). It is not possible to query across
        * multiple entity types. For example, there is no facility to find published
        * nodes written by users created in the last hour, as this would require
        * querying both node->status and user->created.
+       *
        * Normally we would not want to have public properties on the object, as that
        * allows the object's state to become inconsistent too easily. However, this
        * class's standard use case involves primarily code that does need to have
        * direct access to the collected properties in order to handle alternate
        * execution routines. We therefore use public properties for simplicity. Note
        * that code that is simply creating and running a field query should still use
        * the appropriate methods to add conditions on the query.
+       *
        * Storage engines are not required to support every type of query. By default,
        * an EntityFieldQueryException will be raised if an unsupported condition is
        * specified or if the query has field conditions or sorts that are stored in
        * different field storage engines. However, this logic can be overridden in
        * hook_entity_query_alter().
+       *
        * Also note that this query does not automatically respect entity access
        * restrictions. Node access control is performed by the SQL storage engine but
        * other storage engines might not do this.
        */
       class EntityFieldQuery {
         /**
          * Indicates that both deleted and non-deleted fields should be returned.
+         *
          * @see EntityFieldQuery::deleted()
          */
         const RETURN_ALL = NULL;
         /**
          * TRUE if the query has already been altered, FALSE if it hasn't.
+         *
          * Used in alter hooks to check for cloned queries that have already been
          * altered prior to the clone (for example, the pager count query).
+         *
          * @var boolean
          */
         public $altered = FALSE;
         /**
          * Associative array of entity-generic metadata conditions.
+         *
          * @var array
+         *
          * @see EntityFieldQuery::entityCondition()
          */
         public $entityConditions = array();
         /**
          * List of field conditions.
+         *
          * @var array
+         *
          * @see EntityFieldQuery::fieldCondition()
          */
         public $fieldConditions = array();
         /**
          * List of field meta conditions (language and delta).
+         *
          * Field conditions operate on columns specified by hook_field_schema(),
          * the meta conditions operate on columns added by the system: delta
          * and language. These can not be mixed with the field conditions because
          * field columns can have any name including delta and language.
+         *
          * @var array
+         *
          * @see EntityFieldQuery::fieldLanguageCondition()
          * @see EntityFieldQuery::fieldDeltaCondition()
          */
         public $fieldMetaConditions = array();
         /**
          * List of property conditions.
+         *
          * @var array
+         *
          * @see EntityFieldQuery::propertyCondition()
          */
         public $propertyConditions = array();
         /**
          * List of order clauses.
+         *
          * @var array
          */
         public $order = array();
         /**
          * The query range.
+         *
          * @var array
+         *
          * @see EntityFieldQuery::range()
          */
         public $range = array();
         /**
          * The query pager data.
+         *
          * @var array
+         *
          * @see EntityFieldQuery::pager()
          */
         public $pager = array();
         /**
          * Query behavior for deleted data.
+         *
          * TRUE to return only deleted data, FALSE to return only non-deleted data,
          * EntityFieldQuery::RETURN_ALL to return everything.
+         *
          * @see EntityFieldQuery::deleted()
          */
         public $deleted = FALSE;
         /**
          * A list of field arrays used.
+         *
          * Field names passed to EntityFieldQuery::fieldCondition() and
          * EntityFieldQuery::fieldOrderBy() are run through field_info_field() before
          * stored in this array. This way, the elements of this array are field
          * arrays.
+         *
          * @var array
          */
         public $fields = array();
         /**
          * TRUE if this is a count query, FALSE if it isn't.
+         *
          * @var boolean
          */
         public $count = FALSE;
         /**
          * Flag indicating whether this is querying current or all revisions.
+         *
          * @var int
+         *
          * @see EntityFieldQuery::age()
          */
         public $age = FIELD_LOAD_CURRENT;
         /**
          * A list of the tags added to this query.
+         *
          * @var array
+         *
          * @see EntityFieldQuery::addTag()
          */
         public $tags = array();
         /**
          * A list of metadata added to this query.
+         *
          * @var array
+         *
          * @see EntityFieldQuery::addMetaData()
          */
         public $metaData = array();
         /**
          * The ordered results.
+         *
          * @var array
+         *
          * @see EntityFieldQuery::execute().
          */
         public $orderedResults = array();
         /**
          * The method executing the query, if it is overriding the default.
+         *
          * @var string
+         *
          * @see EntityFieldQuery::execute().
          */
         public $executeCallback = '';
         /**
          * Adds a condition on entity-generic metadata.
+         *
          * If the overall query contains only entity conditions or ordering, or if
          * there are property conditions, then specifying the entity type is
          * mandatory. If there are field conditions or ordering but no property
          * conditions or ordering, then specifying an entity type is optional. While
          * the field storage engine might support field conditions on more than one
          * entity type, there is no way to query across multiple entity base tables by
          * default. To specify the entity type, pass in 'entity_type' for $name,
          * the type as a string for $value, and no $operator (it's disregarded).
+         *
          * 'bundle', 'revision_id' and 'entity_id' have no such restrictions.
+         *
          * Note: The "comment" entity type does not support bundle conditions.
+         *
          * @param $name
          *   'entity_type', 'bundle', 'revision_id' or 'entity_id'.
          * @param $value
          *   The value for $name. In most cases, this is a scalar. For more complex
          *   options, it is an array. The meaning of each element in the array is
          *   dependent on $operator.
          * @param $operator
          *   Possible values:
          *   - '=', '<>', '>', '>=', '<', '<=', 'STARTS_WITH', 'CONTAINS': These
          *     operators expect $value to be a literal of the same type as the
          *     column.
          *   - 'IN', 'NOT IN': These operators expect $value to be an array of
          *     literals of the same type as the column.
          *   - 'BETWEEN': This operator expects $value to be an array of two literals
          *     of the same type as the column.
          *   The operator can be omitted, and will default to 'IN' if the value is an
          *   array, or to '=' otherwise.
+         *
          * @return EntityFieldQuery
          *   The called object.
          */
         public function entityCondition($name, $value, $operator = NULL) {
           // The '!=' operator is deprecated in favour of the '<>' operator since the
           // latter is ANSI SQL compatible.
           if ($operator == '!=') {
             $operator = '<>';
+          }
           $this->entityConditions[$name] = array(
             'value' => $value,
             'operator' => $operator,
           );
           return $this;
+        }
         /**
          * Adds a condition on field values.
+         *
          * Note that entities with empty field values will be excluded from the
          * EntityFieldQuery results when using this method.
+         *
          * @param $field
          *   Either a field name or a field array.
          * @param $column
          *   The column that should hold the value to be matched.
          * @param $value
          *   The value to test the column value against.
          * @param $operator
          *   The operator to be used to test the given value.
          * @param $delta_group
          *   An arbitrary identifier: conditions in the same group must have the same
          *   $delta_group.
          * @param $language_group
          *   An arbitrary identifier: conditions in the same group must have the same
          *   $language_group.
+         *
          * @return EntityFieldQuery
          *   The called object.
+         *
          * @see EntityFieldQuery::addFieldCondition
          * @see EntityFieldQuery::deleted
          */
         public function fieldCondition($field, $column = NULL, $value = NULL, $operator = NULL, $delta_group = NULL, $language_group = NULL) {
           return $this->addFieldCondition($this->fieldConditions, $field, $column, $value, $operator, $delta_group, $language_group);
+        }
         /**
          * Adds a condition on the field language column.
+         *
          * @param $field
          *   Either a field name or a field array.
          * @param $value
          *   The value to test the column value against.
          * @param $operator
          *   The operator to be used to test the given value.
          * @param $delta_group
          *   An arbitrary identifier: conditions in the same group must have the same
          *   $delta_group.
          * @param $language_group
          *   An arbitrary identifier: conditions in the same group must have the same
          *   $language_group.
+         *
          * @return EntityFieldQuery
          *   The called object.
+         *
          * @see EntityFieldQuery::addFieldCondition
          * @see EntityFieldQuery::deleted
          */
         public function fieldLanguageCondition($field, $value = NULL, $operator = NULL, $delta_group = NULL, $language_group = NULL) {
           return $this->addFieldCondition($this->fieldMetaConditions, $field, 'language', $value, $operator, $delta_group, $language_group);
+        }
         /**
          * Adds a condition on the field delta column.
+         *
          * @param $field
          *   Either a field name or a field array.
          * @param $value
          *   The value to test the column value against.
          * @param $operator
          *   The operator to be used to test the given value.
          * @param $delta_group
          *   An arbitrary identifier: conditions in the same group must have the same
          *   $delta_group.
          * @param $language_group
          *   An arbitrary identifier: conditions in the same group must have the same
          *   $language_group.
+         *
          * @return EntityFieldQuery
          *   The called object.
+         *
          * @see EntityFieldQuery::addFieldCondition
          * @see EntityFieldQuery::deleted
          */
         public function fieldDeltaCondition($field, $value = NULL, $operator = NULL, $delta_group = NULL, $language_group = NULL) {
           return $this->addFieldCondition($this->fieldMetaConditions, $field, 'delta', $value, $operator, $delta_group, $language_group);
+        }
         /**
          * Adds the given condition to the proper condition array.
+         *
          * @param $conditions
          *   A reference to an array of conditions.
          * @param $field
          *   Either a field name or a field array.
          * @param $column
          *   A column defined in the hook_field_schema() of this field. If this is
          *   omitted then the query will find only entities that have data in this
          *   field, using the entity and property conditions if there are any.
          * @param $value
          *   The value to test the column value against. In most cases, this is a
          *   scalar. For more complex options, it is an array. The meaning of each
          *   element in the array is dependent on $operator.
          * @param $operator
          *   Possible values:
          *   - '=', '<>', '>', '>=', '<', '<=', 'STARTS_WITH', 'CONTAINS': These
          *     operators expect $value to be a literal of the same type as the
          *     column.
          *   - 'IN', 'NOT IN': These operators expect $value to be an array of
          *     literals of the same type as the column.
          *   - 'BETWEEN': This operator expects $value to be an array of two literals
          *     of the same type as the column.
          *   The operator can be omitted, and will default to 'IN' if the value is an
          *   array, or to '=' otherwise.
          * @param $delta_group
          *   An arbitrary identifier: conditions in the same group must have the same
          *   $delta_group. For example, let's presume a multivalue field which has
          *   two columns, 'color' and 'shape', and for entity id 1, there are two
          *   values: red/square and blue/circle. Entity ID 1 does not have values
          *   corresponding to 'red circle', however if you pass 'red' and 'circle' as
          *   conditions, it will appear in the  results - by default queries will run
          *   against any combination of deltas. By passing the conditions with the
          *   same $delta_group it will ensure that only values attached to the same
          *   delta are matched, and entity 1 would then be excluded from the results.
          * @param $language_group
          *   An arbitrary identifier: conditions in the same group must have the same
          *   $language_group.
+         *
          * @return EntityFieldQuery
          *   The called object.
          */
         protected function addFieldCondition(&$conditions, $field, $column = NULL, $value = NULL, $operator = NULL, $delta_group = NULL, $language_group = NULL) {
           // The '!=' operator is deprecated in favour of the '<>' operator since the
           // latter is ANSI SQL compatible.
           if ($operator == '!=') {
             $operator = '<>';
+          }
           if (is_scalar($field)) {
             $field_definition = field_info_field($field);
             if (empty($field_definition)) {
               throw new EntityFieldQueryException(t('Unknown field: @field_name', array('@field_name' => $field)));
+            }
             $field = $field_definition;
+          }
           // Ensure the same index is used for field conditions as for fields.
           $index = count($this->fields);
           $this->fields[$index] = $field;
           if (isset($column)) {
             $conditions[$index] = array(
               'field' => $field,
               'column' => $column,
               'value' => $value,
               'operator' => $operator,
               'delta_group' => $delta_group,
               'language_group' => $language_group,
             );
+          }
           return $this;
+        }
         /**
          * Adds a condition on an entity-specific property.
+         *
          * An $entity_type must be specified by calling
          * EntityFieldCondition::entityCondition('entity_type', $entity_type) before
          * executing the query. Also, by default only entities stored in SQL are
          * supported; however, EntityFieldQuery::executeCallback can be set to handle
          * different entity storage.
+         *
          * @param $column
          *   A column defined in the hook_schema() of the base table of the entity.
          * @param $value
          *   The value to test the field against. In most cases, this is a scalar. For
          *   more complex options, it is an array. The meaning of each element in the
          *   array is dependent on $operator.
          * @param $operator
          *   Possible values:
          *   - '=', '<>', '>', '>=', '<', '<=', 'STARTS_WITH', 'CONTAINS': These
          *     operators expect $value to be a literal of the same type as the
          *     column.
          *   - 'IN', 'NOT IN': These operators expect $value to be an array of
          *     literals of the same type as the column.
          *   - 'BETWEEN': This operator expects $value to be an array of two literals
          *     of the same type as the column.
          *   The operator can be omitted, and will default to 'IN' if the value is an
          *   array, or to '=' otherwise.
+         *
          * @return EntityFieldQuery
          *   The called object.
          */
         public function propertyCondition($column, $value, $operator = NULL) {
           // The '!=' operator is deprecated in favour of the '<>' operator since the
           // latter is ANSI SQL compatible.
           if ($operator == '!=') {
             $operator = '<>';
+          }
           $this->propertyConditions[] = array(
             'column' => $column,
             'value' => $value,
             'operator' => $operator,
           );
           return $this;
+        }
         /**
          * Orders the result set by entity-generic metadata.
+         *
          * If called multiple times, the query will order by each specified column in
          * the order this method is called.
+         *
          * Note: The "comment" and "taxonomy_term" entity types don't support ordering
          * by bundle. For "taxonomy_term", propertyOrderBy('vid') can be used instead.
+         *
          * @param $name
          *   'entity_type', 'bundle', 'revision_id' or 'entity_id'.
          * @param $direction
          *   The direction to sort. Legal values are "ASC" and "DESC".
+         *
          * @return EntityFieldQuery
          *   The called object.
          */
         public function entityOrderBy($name, $direction = 'ASC') {
           $this->order[] = array(
             'type' => 'entity',
             'specifier' => $name,
             'direction' => $direction,
           );
           return $this;
+        }
         /**
          * Orders the result set by a given field column.
+         *
          * If called multiple times, the query will order by each specified column in
          * the order this method is called. Note that entities with empty field
          * values will be excluded from the EntityFieldQuery results when using this
          * method.
+         *
          * @param $field
          *   Either a field name or a field array.
          * @param $column
          *   A column defined in the hook_field_schema() of this field. entity_id and
          *   bundle can also be used.
          * @param $direction
          *   The direction to sort. Legal values are "ASC" and "DESC".
+         *
          * @return EntityFieldQuery
          *   The called object.
          */
         public function fieldOrderBy($field, $column, $direction = 'ASC') {
           if (is_scalar($field)) {
             $field_definition = field_info_field($field);
             if (empty($field_definition)) {
               throw new EntityFieldQueryException(t('Unknown field: @field_name', array('@field_name' => $field)));
+            }
             $field = $field_definition;
+          }
           // Save the index used for the new field, for later use in field storage.
           $index = count($this->fields);
           $this->fields[$index] = $field;
           $this->order[] = array(
             'type' => 'field',
             'specifier' => array(
               'field' => $field,
               'index' => $index,
               'column' => $column,
             ),
             'direction' => $direction,
           );
           return $this;
+        }
         /**
          * Orders the result set by an entity-specific property.
+         *
          * An $entity_type must be specified by calling
          * EntityFieldCondition::entityCondition('entity_type', $entity_type) before
          * executing the query.
+         *
          * If called multiple times, the query will order by each specified column in
          * the order this method is called.
+         *
          * @param $column
          *   The column on which to order.
          * @param $direction
          *   The direction to sort. Legal values are "ASC" and "DESC".
+         *
          * @return EntityFieldQuery
          *   The called object.
          */
         public function propertyOrderBy($column, $direction = 'ASC') {
           $this->order[] = array(
             'type' => 'property',
             'specifier' => $column,
             'direction' => $direction,
           );
           return $this;
+        }
         /**
          * Sets the query to be a count query only.
+         *
          * @return EntityFieldQuery
          *   The called object.
          */
         public function count() {
           $this->count = TRUE;
           return $this;
+        }
         /**
          * Restricts a query to a given range in the result set.
+         *
          * @param $start
          *   The first entity from the result set to return. If NULL, removes any
          *   range directives that are set.
          * @param $length
          *   The number of entities to return from the result set.
+         *
          * @return EntityFieldQuery
          *   The called object.
          */
         public function range($start = NULL, $length = NULL) {
           $this->range = array(
             'start' => $start,
             'length' => $length,
           );
           return $this;
+        }
         /**
          * Enables a pager for the query.
+         *
          * @param $limit
          *   An integer specifying the number of elements per page.  If passed a false
          *   value (FALSE, 0, NULL), the pager is disabled.
          * @param $element
          *   An optional integer to distinguish between multiple pagers on one page.
          *   If not provided, one is automatically calculated.
+         *
          * @return EntityFieldQuery
          *   The called object.
          */
         public function pager($limit = 10, $element = NULL) {
           if (!isset($element)) {
             $element = PagerDefault::$maxElement++;
+          }
           elseif ($element >= PagerDefault::$maxElement) {
             PagerDefault::$maxElement = $element + 1;
+          }
           $this->pager = array(
             'limit' => $limit,
             'element' => $element,
           );
           return $this;
+        }
         /**
          * Enables sortable tables for this query.
+         *
          * @param $headers
          *   An EFQ Header array based on which the order clause is added to the
          *   query.
+         *
          * @return EntityFieldQuery
          *   The called object.
          */
         public function tableSort(&$headers) {
           // If 'field' is not initialized, the header columns aren't clickable
           foreach ($headers as $key =>$header) {
             if (is_array($header) && isset($header['specifier'])) {
               $headers[$key]['field'] = '';
+            }
+          }
           $order = tablesort_get_order($headers);
           $direction = tablesort_get_sort($headers);
           foreach ($headers as $header) {
             if (is_array($header) && ($header['data'] == $order['name'])) {
               if ($header['type'] == 'field') {
                 $this->fieldOrderBy($header['specifier']['field'], $header['specifier']['column'], $direction);
+              }
               else {
                 $header['direction'] = $direction;
                 $this->order[] = $header;
+              }
+            }
+          }
           return $this;
+        }
         /**
          * Filters on the data being deleted.
+         *
          * @param $deleted
          *   TRUE to only return deleted data, FALSE to return non-deleted data,
          *   EntityFieldQuery::RETURN_ALL to return everything. Defaults to FALSE.
+         *
          * @return EntityFieldQuery
          *   The called object.
          */
         public function deleted($deleted = TRUE) {
           $this->deleted = $deleted;
           return $this;
+        }
         /**
          * Queries the current or every revision.
+         *
          * Note that this only affects field conditions. Property conditions always
          * apply to the current revision.
          * @TODO: Once revision tables have been cleaned up, revisit this.
+         *
          * @param $age
          *   - FIELD_LOAD_CURRENT (default): Query the most recent revisions for all
          *     entities. The results will be keyed by entity type and entity ID.
          *   - FIELD_LOAD_REVISION: Query all revisions. The results will be keyed by
          *     entity type and entity revision ID.
+         *
          * @return EntityFieldQuery
          *   The called object.
          */
         public function age($age) {
           $this->age = $age;
           return $this;
+        }
         /**
          * Adds a tag to the query.
+         *
          * Tags are strings that mark a query so that hook_query_alter() and
          * hook_query_TAG_alter() implementations may decide if they wish to alter
          * the query. A query may have any number of tags, and they must be valid PHP
          * identifiers (composed of letters, numbers, and underscores). For example,
          * queries involving nodes that will be displayed for a user need to add the
          * tag 'node_access', so that the node module can add access restrictions to
          * the query.
+         *
          * If an entity field query has tags, it must also have an entity type
          * specified, because the alter hook will need the entity base table.
+         *
          * @param string $tag
          *   The tag to add.
+         *
          * @return EntityFieldQuery
          *   The called object.
          */
         public function addTag($tag) {
           $this->tags[$tag] = $tag;
           return $this;
+        }
         /**
          * Adds additional metadata to the query.
+         *
          * Sometimes a query may need to provide additional contextual data for the
          * alter hook. The alter hook implementations may then use that information
          * to decide if and how to take action.
+         *
          * @param $key
          *   The unique identifier for this piece of metadata. Must be a string that
          *   follows the same rules as any other PHP identifier.
          * @param $object
          *   The additional data to add to the query. May be any valid PHP variable.
+         *
          * @return EntityFieldQuery
          *   The called object.
          */
         public function addMetaData($key, $object) {
           $this->metaData[$key] = $object;
           return $this;
+        }
         /**
          * Executes the query.
+         *
          * After executing the query, $this->orderedResults will contain a list of
          * the same stub entities in the order returned by the query. This is only
          * relevant if there are multiple entity types in the returned value and
          * a field ordering was requested. In every other case, the returned value
          * contains everything necessary for processing.
+         *
          * @return
          *   Either a number if count() was called or an array of associative arrays
          *   of stub entities. The outer array keys are entity types, and the inner
          *   array keys are the relevant ID. (In most cases this will be the entity
          *   ID. The only exception is when age=FIELD_LOAD_REVISION is used and field
          *   conditions or sorts are present -- in this case, the key will be the
          *   revision ID.) The entity type will only exist in the outer array if
          *   results were found. The inner array values are always stub entities, as
          *   returned by entity_create_stub_entity(). To traverse the returned array:
          *   @code
          *     foreach ($query->execute() as $entity_type => $entities) {
          *       foreach ($entities as $entity_id => $entity) {
          *   @endcode
          *   Note if the entity type is known, then the following snippet will load
          *   the entities found:
          *   @code
          *     $result = $query->execute();
          *     if (!empty($result[$my_type])) {
          *       $entities = entity_load($my_type, array_keys($result[$my_type]));
          *     }
          *   @endcode
          */
         public function execute() {
           // Give a chance to other modules to alter the query.
           drupal_alter('entity_query', $this);
           $this->altered = TRUE;
           // Initialize the pager.
           $this->initializePager();
           // Execute the query using the correct callback.
           $result = call_user_func($this->queryCallback(), $this);
           return $result;
+        }
         /**
          * Determines the query callback to use for this entity query.
+         *
          * @return
          *   A callback that can be used with call_user_func().
          */
         public function queryCallback() {
           // Use the override from $this->executeCallback. It can be set either
           // while building the query, or using hook_entity_query_alter().
           if (function_exists($this->executeCallback)) {
             return $this->executeCallback;
+          }
           // If there are no field conditions and sorts, and no execute callback
           // then we default to querying entity tables in SQL.
           if (empty($this->fields)) {
             return array($this, 'propertyQuery');
+          }
           // If no override, find the storage engine to be used.
           foreach ($this->fields as $field) {
             if (!isset($storage)) {
               $storage = $field['storage']['module'];
+            }
             elseif ($storage != $field['storage']['module']) {
               throw new EntityFieldQueryException(t("Can't handle more than one field storage engine"));
+            }
+          }
           if ($storage) {
             // Use hook_field_storage_query() from the field storage.
             return $storage . '_field_storage_query';
+          }
           else {
             throw new EntityFieldQueryException(t("Field storage engine not found."));
+          }
+        }
         /**
          * Queries entity tables in SQL for property conditions and sorts.
+         *
          * This method is only used if there are no field conditions and sorts.
+         *
          * @return
          *   See EntityFieldQuery::execute().
          */
         protected function propertyQuery() {
           if (empty($this->entityConditions['entity_type'])) {
             throw new EntityFieldQueryException(t('For this query an entity type must be specified.'));
+          }
           $entity_type = $this->entityConditions['entity_type']['value'];
           $entity_info = entity_get_info($entity_type);
           if (empty($entity_info['base table'])) {
             throw new EntityFieldQueryException(t('Entity %entity has no base table.', array('%entity' => $entity_type)));
+          }
           $base_table = $entity_info['base table'];
           $base_table_schema = drupal_get_schema($base_table);
           $select_query = db_select($base_table);
           $select_query->addExpression(':entity_type', 'entity_type', array(':entity_type' => $entity_type));
           // Process the property conditions.
           foreach ($this->propertyConditions as $property_condition) {
             $this->addCondition($select_query, $base_table . '.' . $property_condition['column'], $property_condition);
+          }
           // Process the four possible entity condition.
           // The id field is always present in entity keys.
           $sql_field = $entity_info['entity keys']['id'];
           $id_map['entity_id'] = $sql_field;
           $select_query->addField($base_table, $sql_field, 'entity_id');
           if (isset($this->entityConditions['entity_id'])) {
             $this->addCondition($select_query, $base_table . '.' . $sql_field, $this->entityConditions['entity_id']);
+          }
           // If there is a revision key defined, use it.
           if (!empty($entity_info['entity keys']['revision'])) {
             $sql_field = $entity_info['entity keys']['revision'];
             $select_query->addField($base_table, $sql_field, 'revision_id');
             if (isset($this->entityConditions['revision_id'])) {
               $this->addCondition($select_query, $base_table . '.' . $sql_field, $this->entityConditions['revision_id']);
+            }
+          }
           else {
             $sql_field = 'revision_id';
             $select_query->addExpression('NULL', 'revision_id');
+          }
           $id_map['revision_id'] = $sql_field;
           // Handle bundles.
           if (!empty($entity_info['entity keys']['bundle'])) {
             $sql_field = $entity_info['entity keys']['bundle'];
             $having = FALSE;
             if (!empty($base_table_schema['fields'][$sql_field])) {
               $select_query->addField($base_table, $sql_field, 'bundle');
+            }
+          }
           else {
             $sql_field = 'bundle';
             $select_query->addExpression(':bundle', 'bundle', array(':bundle' => $entity_type));
             $having = TRUE;
+          }
           $id_map['bundle'] = $sql_field;
           if (isset($this->entityConditions['bundle'])) {
             if (!empty($entity_info['entity keys']['bundle'])) {
               $this->addCondition($select_query, $base_table . '.' . $sql_field, $this->entityConditions['bundle'], $having);
+            }
             else {
               // This entity has no bundle, so invalidate the query.
               $select_query->where('1 = 0');
+            }
+          }
           // Order the query.
           foreach ($this->order as $order) {
             if ($order['type'] == 'entity') {
               $key = $order['specifier'];
               if (!isset($id_map[$key])) {
                 throw new EntityFieldQueryException(t('Do not know how to order on @key for @entity_type', array('@key' => $key, '@entity_type' => $entity_type)));
+              }
               $select_query->orderBy($id_map[$key], $order['direction']);
+            }
             elseif ($order['type'] == 'property') {
               $select_query->orderBy($base_table . '.' . $order['specifier'], $order['direction']);
+            }
+          }
           return $this->finishQuery($select_query);
+        }
         /**
          * Gets the total number of results and initializes a pager for the query.
+         *
          * The pager can be disabled by either setting the pager limit to 0, or by
          * setting this query to be a count query.
          */
         function initializePager() {
           if ($this->pager && !empty($this->pager['limit']) && !$this->count) {
             $page = pager_find_page($this->pager['element']);
             $count_query = clone $this;
             $this->pager['total'] = $count_query->count()->execute();
             $this->pager['start'] = $page * $this->pager['limit'];
             pager_default_initialize($this->pager['total'], $this->pager['limit'], $this->pager['element']);
             $this->range($this->pager['start'], $this->pager['limit']);
+          }
+        }
         /**
          * Finishes the query.
+         *
          * Adds tags, metaData, range and returns the requested list or count.
+         *
          * @param SelectQuery $select_query
          *   A SelectQuery which has entity_type, entity_id, revision_id and bundle
          *   fields added.
          * @param $id_key
          *   Which field's values to use as the returned array keys.
+         *
          * @return
          *   See EntityFieldQuery::execute().
          */
         function finishQuery($select_query, $id_key = 'entity_id') {
           foreach ($this->tags as $tag) {
             $select_query->addTag($tag);
+          }
           foreach ($this->metaData as $key => $object) {
             $select_query->addMetaData($key, $object);
+          }
           $select_query->addMetaData('entity_field_query', $this);
           if ($this->range) {
             $select_query->range($this->range['start'], $this->range['length']);
+          }
           if ($this->count) {
             return $select_query->countQuery()->execute()->fetchField();
+          }
           $return = array();
           foreach ($select_query->execute() as $partial_entity) {
             $bundle = isset($partial_entity->bundle) ? $partial_entity->bundle : NULL;
             $entity = entity_create_stub_entity($partial_entity->entity_type, array($partial_entity->entity_id, $partial_entity->revision_id, $bundle));
             $return[$partial_entity->entity_type][$partial_entity->$id_key] = $entity;
             $this->ordered_results[] = $partial_entity;
+          }
           return $return;
+        }
         /**
          * Adds a condition to an already built SelectQuery (internal function).
+         *
          * This is a helper for hook_entity_query() and hook_field_storage_query().
+         *
          * @param SelectQuery $select_query
          *   A SelectQuery object.
          * @param $sql_field
          *   The name of the field.
          * @param $condition
          *   A condition as described in EntityFieldQuery::fieldCondition() and
          *   EntityFieldQuery::entityCondition().
          * @param $having
          *   HAVING or WHERE. This is necessary because SQL can't handle WHERE
          *   conditions on aliased columns.
          */
         public function addCondition(SelectQuery $select_query, $sql_field, $condition, $having = FALSE) {
           $method = $having ? 'havingCondition' : 'condition';
           $like_prefix = '';
           switch ($condition['operator']) {
             case 'CONTAINS':
               $like_prefix = '%';
             case 'STARTS_WITH':
               $select_query->$method($sql_field, $like_prefix . db_like($condition['value']) . '%', 'LIKE');
               break;
             default:
               $select_query->$method($sql_field, $condition['value'], $condition['operator']);
+          }
+        }
+      }
       /**
        * Defines an exception thrown when a malformed entity is passed.
        */
       class EntityMalformedException extends Exception { }

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root / drupal7 / includes / entity.inc @ d3889c60