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doctrine2/lib/Doctrine/ORM/Mapping/ClassMetadata.php

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<?php
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/*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information, see
* <http://www.doctrine-project.org>.
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*/
namespace Doctrine\ORM\Mapping;
use ReflectionClass, ReflectionProperty;
/**
* A <tt>ClassMetadata</tt> instance holds all the object-relational mapping metadata
* of an entity and it's associations.
*
* Once populated, ClassMetadata instances are usually cached in a serialized form.
*
* <b>IMPORTANT NOTE:</b>
*
* The fields of this class are only public for 2 reasons:
* 1) To allow fast READ access.
* 2) To drastically reduce the size of a serialized instance (private/protected members
* get the whole class name, namespace inclusive, prepended to every property in
* the serialized representation).
*
* @author Roman Borschel <roman@code-factory.org>
* @author Jonathan H. Wage <jonwage@gmail.com>
* @since 2.0
*/
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class ClassMetadata extends ClassMetadataInfo
{
/**
* The ReflectionProperty instances of the mapped class.
*
* @var array
*/
public $reflFields = array();
/**
* The prototype from which new instances of the mapped class are created.
*
* @var object
*/
private $_prototype;
/**
* Initializes a new ClassMetadata instance that will hold the object-relational mapping
* metadata of the class with the given name.
*
* @param string $entityName The name of the entity class the new instance is used for.
*/
public function __construct($entityName)
{
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$this->reflClass = new ReflectionClass($entityName);
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$this->namespace = $this->reflClass->getNamespaceName();
$this->table['name'] = $this->reflClass->getShortName();
parent::__construct($this->reflClass->getName()); // do not use $entityName, possible case-problems
}
/**
* Gets the ReflectionPropertys of the mapped class.
*
* @return array An array of ReflectionProperty instances.
*/
public function getReflectionProperties()
{
return $this->reflFields;
}
/**
* Gets a ReflectionProperty for a specific field of the mapped class.
*
* @param string $name
* @return ReflectionProperty
*/
public function getReflectionProperty($name)
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{
return $this->reflFields[$name];
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}
/**
* Gets the ReflectionProperty for the single identifier field.
*
* @return ReflectionProperty
* @throws BadMethodCallException If the class has a composite identifier.
*/
public function getSingleIdReflectionProperty()
{
if ($this->isIdentifierComposite) {
throw new \BadMethodCallException("Class " . $this->name . " has a composite identifier.");
}
return $this->reflFields[$this->identifier[0]];
}
/**
* Validates & completes the given field mapping.
*
* @param array $mapping The field mapping to validated & complete.
* @return array The validated and completed field mapping.
*
* @throws MappingException
*/
protected function _validateAndCompleteFieldMapping(array &$mapping)
{
parent::_validateAndCompleteFieldMapping($mapping);
// Store ReflectionProperty of mapped field
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$refProp = $this->reflClass->getProperty($mapping['fieldName']);
$refProp->setAccessible(true);
$this->reflFields[$mapping['fieldName']] = $refProp;
}
/**
* Extracts the identifier values of an entity of this class.
*
* For composite identifiers, the identifier values are returned as an array
* with the same order as the field order in {@link identifier}.
*
* @param object $entity
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* @return array
*/
public function getIdentifierValues($entity)
{
if ($this->isIdentifierComposite) {
$id = array();
foreach ($this->identifier as $idField) {
$value = $this->reflFields[$idField]->getValue($entity);
if ($value !== null) {
$id[$idField] = $value;
}
}
return $id;
} else {
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$value = $this->reflFields[$this->identifier[0]]->getValue($entity);
if ($value !== null) {
return array($this->identifier[0] => $value);
}
return array();
}
}
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/**
* Populates the entity identifier of an entity.
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*
* @param object $entity
* @param mixed $id
* @todo Rename to assignIdentifier()
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*/
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public function setIdentifierValues($entity, array $id)
{
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foreach ($id as $idField => $idValue) {
$this->reflFields[$idField]->setValue($entity, $idValue);
}
}
/**
* Sets the specified field to the specified value on the given entity.
*
* @param object $entity
* @param string $field
* @param mixed $value
*/
public function setFieldValue($entity, $field, $value)
{
$this->reflFields[$field]->setValue($entity, $value);
}
/**
* Gets the specified field's value off the given entity.
*
* @param object $entity
* @param string $field
*/
public function getFieldValue($entity, $field)
{
return $this->reflFields[$field]->getValue($entity);
}
/**
* Stores the association mapping.
*
* @param AssociationMapping $assocMapping
*/
protected function _storeAssociationMapping(array $assocMapping)
{
parent::_storeAssociationMapping($assocMapping);
// Store ReflectionProperty of mapped field
$sourceFieldName = $assocMapping['fieldName'];
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$refProp = $this->reflClass->getProperty($sourceFieldName);
$refProp->setAccessible(true);
$this->reflFields[$sourceFieldName] = $refProp;
}
/**
* Creates a string representation of this instance.
*
* @return string The string representation of this instance.
* @todo Construct meaningful string representation.
*/
public function __toString()
{
return __CLASS__ . '@' . spl_object_hash($this);
}
/**
* Determines which fields get serialized.
*
* It is only serialized what is necessary for best unserialization performance.
* That means any metadata properties that are not set or empty or simply have
* their default value are NOT serialized.
*
* Parts that are also NOT serialized because they can not be properly unserialized:
* - reflClass (ReflectionClass)
* - reflFields (ReflectionProperty array)
*
* @return array The names of all the fields that should be serialized.
*/
public function __sleep()
{
// This metadata is always serialized/cached.
$serialized = array(
'associationMappings',
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'columnNames', //TODO: Not really needed. Can use fieldMappings[$fieldName]['columnName']
'fieldMappings',
'fieldNames',
'identifier',
'isIdentifierComposite', // TODO: REMOVE
'name',
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'namespace', // TODO: REMOVE
'table',
'rootEntityName',
'idGenerator', //TODO: Does not really need to be serialized. Could be moved to runtime.
);
// The rest of the metadata is only serialized if necessary.
if ($this->changeTrackingPolicy != self::CHANGETRACKING_DEFERRED_IMPLICIT) {
$serialized[] = 'changeTrackingPolicy';
}
if ($this->customRepositoryClassName) {
$serialized[] = 'customRepositoryClassName';
}
if ($this->inheritanceType != self::INHERITANCE_TYPE_NONE) {
$serialized[] = 'inheritanceType';
$serialized[] = 'discriminatorColumn';
$serialized[] = 'discriminatorValue';
$serialized[] = 'discriminatorMap';
$serialized[] = 'parentClasses';
$serialized[] = 'subClasses';
}
if ($this->generatorType != self::GENERATOR_TYPE_NONE) {
$serialized[] = 'generatorType';
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if ($this->generatorType == self::GENERATOR_TYPE_SEQUENCE) {
$serialized[] = 'sequenceGeneratorDefinition';
}
}
if ($this->isMappedSuperclass) {
$serialized[] = 'isMappedSuperclass';
}
if ($this->containsForeignIdentifier) {
$serialized[] = 'containsForeignIdentifier';
}
if ($this->isVersioned) {
$serialized[] = 'isVersioned';
$serialized[] = 'versionField';
}
if ($this->lifecycleCallbacks) {
$serialized[] = 'lifecycleCallbacks';
}
if ($this->namedQueries) {
$serialized[] = 'namedQueries';
}
if ($this->isReadOnly) {
$serialized[] = 'isReadOnly';
}
return $serialized;
}
/**
* Restores some state that can not be serialized/unserialized.
*
* @return void
*/
public function __wakeup()
{
// Restore ReflectionClass and properties
$this->reflClass = new ReflectionClass($this->name);
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foreach ($this->fieldMappings as $field => $mapping) {
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if (isset($mapping['declared'])) {
$reflField = new ReflectionProperty($mapping['declared'], $field);
} else {
$reflField = $this->reflClass->getProperty($field);
}
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$reflField->setAccessible(true);
$this->reflFields[$field] = $reflField;
}
foreach ($this->associationMappings as $field => $mapping) {
if (isset($mapping['declared'])) {
$reflField = new ReflectionProperty($mapping['declared'], $field);
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} else {
$reflField = $this->reflClass->getProperty($field);
}
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$reflField->setAccessible(true);
$this->reflFields[$field] = $reflField;
}
}
/**
* Creates a new instance of the mapped class, without invoking the constructor.
*
* @return object
*/
public function newInstance()
{
if ($this->_prototype === null) {
$this->_prototype = unserialize(sprintf('O:%d:"%s":0:{}', strlen($this->name), $this->name));
}
return clone $this->_prototype;
}
/**
* @param string $callback
* @param string $event
*/
public function addLifecycleCallback($callback, $event)
{
if ( !$this->reflClass->hasMethod($callback) ||
($this->reflClass->getMethod($callback)->getModifiers() & \ReflectionMethod::IS_PUBLIC) == 0) {
throw MappingException::lifecycleCallbackMethodNotFound($this->name, $callback);
}
return parent::addLifecycleCallback($callback, $event);
}
}