Iterator class with identity mapping facilities.
ezcPersistentFindIterator only instantiates one object which is reused for each iteration. This saves memory and is faster than fetching and instantiating the result set in one go. This class in addition performs identity mapping and does not re-created objects that already exist in the application scope.
You must loop over the complete resultset of the iterator or flush it before executing new queries.
Example:
Source for this file: /PersistentObject/src/session_decorators/identity/find_iterator.php
ezcPersistentFindIterator | --ezcPersistentIdentityFindIterator
Version: | //autogen// |
protected ezcPersistentIdentityMap |
$idMap
Identity map. |
protected ezcPersistentSessionIdentityDecoratorOptions |
$options
Identity session options |
From ezcPersistentFindIterator | |
---|---|
protected |
ezcPersistentFindIterator::$def
|
protected |
ezcPersistentFindIterator::$object
|
public ezcPersistentIdentityFindIterator |
__construct(
$stmt
, $def
, $idMap
, $options
)
Initializes the iterator with the statement $stmt and the definition $def.. |
public object |
next(
)
Returns the next persistent object in the result set. |
From ezcPersistentFindIterator | |
---|---|
public ezcPersistentFindIterator |
ezcPersistentFindIterator::__construct()
Initializes the iterator with the statement $stmt and the definition $def.. |
public object |
ezcPersistentFindIterator::current()
Returns the current object of this iterator. |
public void |
ezcPersistentFindIterator::flush()
Clears the results from the iterator. |
public null |
ezcPersistentFindIterator::key()
Returns null. |
public object |
ezcPersistentFindIterator::next()
Returns the next persistent object in the result set. |
public void |
ezcPersistentFindIterator::rewind()
Sets the iterator to point to the first object in the result set. |
public bool |
ezcPersistentFindIterator::valid()
Returns true if there is a current object. |
Initializes the iterator with the statement $stmt and the definition $def..
The statement $stmt must be executed but not used to retrieve any results yet. The iterator will return objects with they persistent object type provided by $def.
The $idMap will be used to retrieve existing identities and to store new ones, if discovered. The $options object contains the options used by the identity decorator which uses this instance.
Name | Type | Description |
---|---|---|
$stmt |
PDOStatement | |
$def |
ezcPersistentObjectDefinition | |
$idMap |
ezcPersistentIdentityMap | |
$options |
ezcPersistentSessionIdentityDecoratorOptions |
Method | Description |
---|---|
ezcPersistentFindIterator::__construct() |
Initializes the iterator with the statement $stmt and the definition $def.. |
Returns the next persistent object in the result set.
The next object is set to the current object of the iterator. Returns null and sets the current object to null if there are no more results in the result set.
Method | Description |
---|---|
ezcPersistentFindIterator::next() |
Returns the next persistent object in the result set. |