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File Content: `Form.php`

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Form;

use Symfony\Component\Form\Exception\RuntimeException;
use Symfony\Component\Form\Exception\UnexpectedTypeException;
use Symfony\Component\Form\Exception\AlreadySubmittedException;
use Symfony\Component\Form\Exception\TransformationFailedException;
use Symfony\Component\Form\Exception\LogicException;
use Symfony\Component\Form\Exception\OutOfBoundsException;
use Symfony\Component\Form\Util\FormUtil;
use Symfony\Component\Form\Util\InheritDataAwareIterator;
use Symfony\Component\Form\Util\OrderedHashMap;
use Symfony\Component\PropertyAccess\PropertyPath;

/**
 * Form represents a form.
 *
 * To implement your own form fields, you need to have a thorough understanding
 * of the data flow within a form. A form stores its data in three different
 * representations:
 *
 *   (1) the "model" format required by the form's object
 *   (2) the "normalized" format for internal processing
 *   (3) the "view" format used for display
 *
 * A date field, for example, may store a date as "Y-m-d" string (1) in the
 * object. To facilitate processing in the field, this value is normalized
 * to a DateTime object (2). In the HTML representation of your form, a
 * localized string (3) is presented to and modified by the user.
 *
 * In most cases, format (1) and format (2) will be the same. For example,
 * a checkbox field uses a Boolean value for both internal processing and
 * storage in the object. In these cases you simply need to set a value
 * transformer to convert between formats (2) and (3). You can do this by
 * calling addViewTransformer().
 *
 * In some cases though it makes sense to make format (1) configurable. To
 * demonstrate this, let's extend our above date field to store the value
 * either as "Y-m-d" string or as timestamp. Internally we still want to
 * use a DateTime object for processing. To convert the data from string/integer
 * to DateTime you can set a normalization transformer by calling
 * addNormTransformer(). The normalized data is then converted to the displayed
 * data as described before.
 *
 * The conversions (1) -> (2) -> (3) use the transform methods of the transformers.
 * The conversions (3) -> (2) -> (1) use the reverseTransform methods of the transformers.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 * @author Bernhard Schussek <bschussek@gmail.com>
 */
class Form implements \IteratorAggregate, FormInterface
{
    /**
     * The form's configuration
     * @var FormConfigInterface
     */
    private $config;

    /**
     * The parent of this form
     * @var FormInterface
     */
    private $parent;

    /**
     * The children of this form
     * @var FormInterface[] A map of FormInterface instances
     */
    private $children;

    /**
     * The errors of this form
     * @var FormError[] An array of FormError instances
     */
    private $errors = array();

    /**
     * Whether this form was submitted
     * @var Boolean
     */
    private $submitted = false;

    /**
     * The button that was used to submit the form
     * @var Button
     */
    private $clickedButton;

    /**
     * The form data in model format
     * @var mixed
     */
    private $modelData;

    /**
     * The form data in normalized format
     * @var mixed
     */
    private $normData;

    /**
     * The form data in view format
     * @var mixed
     */
    private $viewData;

    /**
     * The submitted values that don't belong to any children
     * @var array
     */
    private $extraData = array();

    /**
     * Whether the data in model, normalized and view format is
     * synchronized. Data may not be synchronized if transformation errors
     * occur.
     * @var Boolean
     */
    private $synchronized = true;

    /**
     * Whether the form's data has been initialized.
     *
     * When the data is initialized with its default value, that default value
     * is passed through the transformer chain in order to synchronize the
     * model, normalized and view format for the first time. This is done
     * lazily in order to save performance when {@link setData()} is called
     * manually, making the initialization with the configured default value
     * superfluous.
     *
     * @var Boolean
     */
    private $defaultDataSet = false;

    /**
     * Whether setData() is currently being called.
     * @var Boolean
     */
    private $lockSetData = false;

    /**
     * Creates a new form based on the given configuration.
     *
     * @param FormConfigInterface $config The form configuration.
     *
     * @throws LogicException if a data mapper is not provided for a compound form
     */
    public function __construct(FormConfigInterface $config)
    {
        // Compound forms always need a data mapper, otherwise calls to
        // `setData` and `add` will not lead to the correct population of
        // the child forms.
        if ($config->getCompound() && !$config->getDataMapper()) {
            throw new LogicException('Compound forms need a data mapper');
        }

        // If the form inherits the data from its parent, it is not necessary
        // to call setData() with the default data.
        if ($config->getInheritData()) {
            $this->defaultDataSet = true;
        }

        $this->config = $config;
        $this->children = new OrderedHashMap();
    }

    public function __clone()
    {
        $this->children = clone $this->children;

        foreach ($this->children as $key => $child) {
            $this->children[$key] = clone $child;
        }
    }

    /**
     * {@inheritdoc}
     */
    public function getConfig()
    {
        return $this->config;
    }

    /**
     * {@inheritdoc}
     */
    public function getName()
    {
        return $this->config->getName();
    }

    /**
     * {@inheritdoc}
     */
    public function getPropertyPath()
    {
        if (null !== $this->config->getPropertyPath()) {
            return $this->config->getPropertyPath();
        }

        if (null === $this->getName() || '' === $this->getName()) {
            return null;
        }

        $parent = $this->parent;

        while ($parent && $parent->getConfig()->getInheritData()) {
            $parent = $parent->getParent();
        }

        if ($parent && null === $parent->getConfig()->getDataClass()) {
            return new PropertyPath('['.$this->getName().']');
        }

        return new PropertyPath($this->getName());
    }

    /**
     * {@inheritdoc}
     */
    public function isRequired()
    {
        if (null === $this->parent || $this->parent->isRequired()) {
            return $this->config->getRequired();
        }

        return false;
    }

    /**
     * {@inheritDoc}
     */
    public function isDisabled()
    {
        if (null === $this->parent || !$this->parent->isDisabled()) {
            return $this->config->getDisabled();
        }

        return true;
    }

    /**
     * {@inheritdoc}
     */
    public function setParent(FormInterface $parent = null)
    {
        if ($this->submitted) {
            throw new AlreadySubmittedException('You cannot set the parent of a submitted form');
        }

        if (null !== $parent && '' === $this->config->getName()) {
            throw new LogicException('A form with an empty name cannot have a parent form.');
        }

        $this->parent = $parent;

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function getParent()
    {
        return $this->parent;
    }

    /**
     * {@inheritdoc}
     */
    public function getRoot()
    {
        return $this->parent ? $this->parent->getRoot() : $this;
    }

    /**
     * {@inheritdoc}
     */
    public function isRoot()
    {
        return null === $this->parent;
    }

    /**
     * {@inheritdoc}
     */
    public function setData($modelData)
    {
        // If the form is submitted while disabled, it is set to submitted, but the data is not
        // changed. In such cases (i.e. when the form is not initialized yet) don't
        // abort this method.
        if ($this->submitted && $this->defaultDataSet) {
            throw new AlreadySubmittedException('You cannot change the data of a submitted form.');
        }

        // If the form inherits its parent's data, disallow data setting to
        // prevent merge conflicts
        if ($this->config->getInheritData()) {
            throw new RuntimeException('You cannot change the data of a form inheriting its parent data.');
        }

        // Don't allow modifications of the configured data if the data is locked
        if ($this->config->getDataLocked() && $modelData !== $this->config->getData()) {
            return $this;
        }

        if (is_object($modelData) && !$this->config->getByReference()) {
            $modelData = clone $modelData;
        }

        if ($this->lockSetData) {
            throw new RuntimeException('A cycle was detected. Listeners to the PRE_SET_DATA event must not call setData(). You should call setData() on the FormEvent object instead.');
        }

        $this->lockSetData = true;
        $dispatcher = $this->config->getEventDispatcher();

        // Hook to change content of the data
        if ($dispatcher->hasListeners(FormEvents::PRE_SET_DATA)) {
            $event = new FormEvent($this, $modelData);
            $dispatcher->dispatch(FormEvents::PRE_SET_DATA, $event);
            $modelData = $event->getData();
        }

        // Treat data as strings unless a value transformer exists
        if (!$this->config->getViewTransformers() && !$this->config->getModelTransformers() && is_scalar($modelData)) {
            $modelData = (string) $modelData;
        }

        // Synchronize representations - must not change the content!
        $normData = $this->modelToNorm($modelData);
        $viewData = $this->normToView($normData);

        // Validate if view data matches data class (unless empty)
        if (!FormUtil::isEmpty($viewData)) {
            $dataClass = $this->config->getDataClass();

            $actualType = is_object($viewData) ? 'an instance of class '.get_class($viewData) : ' a(n) '.gettype($viewData);

            if (null === $dataClass && is_object($viewData) && !$viewData instanceof \ArrayAccess) {
                $expectedType = 'scalar, array or an instance of \ArrayAccess';

                throw new LogicException(
                    'The form\'s view data is expected to be of type '.$expectedType.', ' .
                    'but is '.$actualType.'. You ' .
                    'can avoid this error by setting the "data_class" option to ' .
                    '"'.get_class($viewData).'" or by adding a view transformer ' .
                    'that transforms '.$actualType.' to '.$expectedType.'.'
                );
            }

            if (null !== $dataClass && !$viewData instanceof $dataClass) {
                throw new LogicException(
                    'The form\'s view data is expected to be an instance of class ' .
                    $dataClass.', but is '. $actualType.'. You can avoid this error ' .
                    'by setting the "data_class" option to null or by adding a view ' .
                    'transformer that transforms '.$actualType.' to an instance of ' .
                    $dataClass.'.'
                );
            }
        }

        $this->modelData = $modelData;
        $this->normData = $normData;
        $this->viewData = $viewData;
        $this->defaultDataSet = true;
        $this->lockSetData = false;

        // It is not necessary to invoke this method if the form doesn't have children,
        // even if the form is compound.
        if (count($this->children) > 0) {
            // Update child forms from the data
            $iterator = new InheritDataAwareIterator($this->children);
            $iterator = new \RecursiveIteratorIterator($iterator);
            $this->config->getDataMapper()->mapDataToForms($viewData, $iterator);
        }

        if ($dispatcher->hasListeners(FormEvents::POST_SET_DATA)) {
            $event = new FormEvent($this, $modelData);
            $dispatcher->dispatch(FormEvents::POST_SET_DATA, $event);
        }

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function getData()
    {
        if ($this->config->getInheritData()) {
            if (!$this->parent) {
                throw new RuntimeException('The form is configured to inherit its parent\'s data, but does not have a parent.');
            }

            return $this->parent->getData();
        }

        if (!$this->defaultDataSet) {
            $this->setData($this->config->getData());
        }

        return $this->modelData;
    }

    /**
     * {@inheritdoc}
     */
    public function getNormData()
    {
        if ($this->config->getInheritData()) {
            if (!$this->parent) {
                throw new RuntimeException('The form is configured to inherit its parent\'s data, but does not have a parent.');
            }

            return $this->parent->getNormData();
        }

        if (!$this->defaultDataSet) {
            $this->setData($this->config->getData());
        }

        return $this->normData;
    }

    /**
     * {@inheritdoc}
     */
    public function getViewData()
    {
        if ($this->config->getInheritData()) {
            if (!$this->parent) {
                throw new RuntimeException('The form is configured to inherit its parent\'s data, but does not have a parent.');
            }

            return $this->parent->getViewData();
        }

        if (!$this->defaultDataSet) {
            $this->setData($this->config->getData());
        }

        return $this->viewData;
    }

    /**
     * {@inheritdoc}
     */
    public function getExtraData()
    {
        return $this->extraData;
    }

    /**
     * {@inheritdoc}
     */
    public function initialize()
    {
        if (null !== $this->parent) {
            throw new RuntimeException('Only root forms should be initialized.');
        }

        // Guarantee that the *_SET_DATA events have been triggered once the
        // form is initialized. This makes sure that dynamically added or
        // removed fields are already visible after initialization.
        if (!$this->defaultDataSet) {
            $this->setData($this->config->getData());
        }

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function handleRequest($request = null)
    {
        $this->config->getRequestHandler()->handleRequest($this, $request);

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function submit($submittedData, $clearMissing = true)
    {
        if ($this->submitted) {
            throw new AlreadySubmittedException('A form can only be submitted once');
        }

        // Initialize errors in the very beginning so that we don't lose any
        // errors added during listeners
        $this->errors = array();

        // Obviously, a disabled form should not change its data upon submission.
        if ($this->isDisabled()) {
            $this->submitted = true;

            return $this;
        }

        // The data must be initialized if it was not initialized yet.
        // This is necessary to guarantee that the *_SET_DATA listeners
        // are always invoked before submit() takes place.
        if (!$this->defaultDataSet) {
            $this->setData($this->config->getData());
        }

        // Treat false as NULL to support binding false to checkboxes.
        // Don't convert NULL to a string here in order to determine later
        // whether an empty value has been submitted or whether no value has
        // been submitted at all. This is important for processing checkboxes
        // and radio buttons with empty values.
        if (false === $submittedData) {
            $submittedData = null;
        } elseif (is_scalar($submittedData)) {
            $submittedData = (string) $submittedData;
        }

        $dispatcher = $this->config->getEventDispatcher();

        $modelData = null;
        $normData = null;
        $viewData = null;

        try {
            // Hook to change content of the data submitted by the browser
            if ($dispatcher->hasListeners(FormEvents::PRE_SUBMIT)) {
                $event = new FormEvent($this, $submittedData);
                $dispatcher->dispatch(FormEvents::PRE_SUBMIT, $event);
                $submittedData = $event->getData();
            }

            // Check whether the form is compound.
            // This check is preferable over checking the number of children,
            // since forms without children may also be compound.
            // (think of empty collection forms)
            if ($this->config->getCompound()) {
                if (null === $submittedData) {
                    $submittedData = array();
                }

                if (!is_array($submittedData)) {
                    throw new TransformationFailedException('Compound forms expect an array or NULL on submission.');
                }

                foreach ($this->children as $name => $child) {
                    if (array_key_exists($name, $submittedData) || $clearMissing) {
                        $child->submit(isset($submittedData[$name]) ? $submittedData[$name] : null, $clearMissing);
                        unset($submittedData[$name]);

                        if (null !== $this->clickedButton) {
                            continue;
                        }

                        if ($child instanceof ClickableInterface && $child->isClicked()) {
                            $this->clickedButton = $child;

                            continue;
                        }

                        if (method_exists($child, 'getClickedButton') && null !== $child->getClickedButton()) {
                            $this->clickedButton = $child->getClickedButton();
                        }
                    }
                }

                $this->extraData = $submittedData;
            }

            // Forms that inherit their parents' data also are not processed,
            // because then it would be too difficult to merge the changes in
            // the child and the parent form. Instead, the parent form also takes
            // changes in the grandchildren (i.e. children of the form that inherits
            // its parent's data) into account.
            // (see InheritDataAwareIterator below)
            if (!$this->config->getInheritData()) {
                // If the form is compound, the default data in view format
                // is reused. The data of the children is merged into this
                // default data using the data mapper.
                // If the form is not compound, the submitted data is also the data in view format.
                $viewData = $this->config->getCompound() ? $this->viewData : $submittedData;

                if (FormUtil::isEmpty($viewData)) {
                    $emptyData = $this->config->getEmptyData();

                    if ($emptyData instanceof \Closure) {
                        /* @var \Closure $emptyData */
                        $emptyData = $emptyData($this, $viewData);
                    }

                    $viewData = $emptyData;
                }

                // Merge form data from children into existing view data
                // It is not necessary to invoke this method if the form has no children,
                // even if it is compound.
                if (count($this->children) > 0) {
                    // Use InheritDataAwareIterator to process children of
                    // descendants that inherit this form's data.
                    // These descendants will not be submitted normally (see the check
                    // for $this->config->getInheritData() above)
                    $childrenIterator = new InheritDataAwareIterator($this->children);
                    $childrenIterator = new \RecursiveIteratorIterator($childrenIterator);
                    $this->config->getDataMapper()->mapFormsToData($childrenIterator, $viewData);
                }

                // Normalize data to unified representation
                $normData = $this->viewToNorm($viewData);

                // Hook to change content of the data in the normalized
                // representation
                if ($dispatcher->hasListeners(FormEvents::SUBMIT)) {
                    $event = new FormEvent($this, $normData);
                    $dispatcher->dispatch(FormEvents::SUBMIT, $event);
                    $normData = $event->getData();
                }

                // Synchronize representations - must not change the content!
                $modelData = $this->normToModel($normData);
                $viewData = $this->normToView($normData);
            }
        } catch (TransformationFailedException $e) {
            $this->synchronized = false;

            // If $viewData was not yet set, set it to $submittedData so that
            // the erroneous data is accessible on the form.
            // Forms that inherit data never set any data, because the getters
            // forward to the parent form's getters anyway.
            if (null === $viewData && !$this->config->getInheritData()) {
                $viewData = $submittedData;
            }
        }

        $this->submitted = true;
        $this->modelData = $modelData;
        $this->normData = $normData;
        $this->viewData = $viewData;

        if ($dispatcher->hasListeners(FormEvents::POST_SUBMIT)) {
            $event = new FormEvent($this, $viewData);
            $dispatcher->dispatch(FormEvents::POST_SUBMIT, $event);
        }

        return $this;
    }

    /**
     * Alias of {@link submit()}.
     *
     * @deprecated Deprecated since version 2.3, to be removed in 3.0. Use
     *             {@link submit()} instead.
     */
    public function bind($submittedData)
    {
        return $this->submit($submittedData);
    }

    /**
     * {@inheritdoc}
     */
    public function addError(FormError $error)
    {
        if ($this->parent && $this->config->getErrorBubbling()) {
            $this->parent->addError($error);
        } else {
            $this->errors[] = $error;
        }

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function isSubmitted()
    {
        return $this->submitted;
    }

    /**
     * Alias of {@link isSubmitted()}.
     *
     * @deprecated Deprecated since version 2.3, to be removed in 3.0. Use
     *             {@link isSubmitted()} instead.
     */
    public function isBound()
    {
        return $this->submitted;
    }

    /**
     * {@inheritdoc}
     */
    public function isSynchronized()
    {
        return $this->synchronized;
    }

    /**
     * {@inheritdoc}
     */
    public function isEmpty()
    {
        foreach ($this->children as $child) {
            if (!$child->isEmpty()) {
                return false;
            }
        }

        return FormUtil::isEmpty($this->modelData) ||
            // arrays, countables
            0 === count($this->modelData) ||
            // traversables that are not countable
            ($this->modelData instanceof \Traversable && 0 === iterator_count($this->modelData));
    }

    /**
     * {@inheritdoc}
     */
    public function isValid()
    {
        if (!$this->submitted) {
            return false;
        }

        if (count($this->errors) > 0) {
            return false;
        }

        if ($this->isDisabled()) {
            return true;
        }

        foreach ($this->children as $child) {
            if ($child->isSubmitted() && !$child->isValid()) {
                return false;
            }
        }

        return true;
    }

    /**
     * Returns the button that was used to submit the form.
     *
     * @return Button|null The clicked button or NULL if the form was not
     *                     submitted
     */
    public function getClickedButton()
    {
        if ($this->clickedButton) {
            return $this->clickedButton;
        }

        if ($this->parent && method_exists($this->parent, 'getClickedButton')) {
            return $this->parent->getClickedButton();
        }

        return null;
    }

    /**
     * {@inheritdoc}
     */
    public function getErrors()
    {
        return $this->errors;
    }

    /**
     * Returns a string representation of all form errors (including children errors).
     *
     * This method should only be used to help debug a form.
     *
     * @param integer $level The indentation level (used internally)
     *
     * @return string A string representation of all errors
     */
    public function getErrorsAsString($level = 0)
    {
        $errors = '';
        foreach ($this->errors as $error) {
            $errors .= str_repeat(' ', $level).'ERROR: '.$error->getMessage()."\n";
        }

        foreach ($this->children as $key => $child) {
            $errors .= str_repeat(' ', $level).$key.":\n";
            if ($child instanceof self && $err = $child->getErrorsAsString($level + 4)) {
                $errors .= $err;
            } else {
                $errors .= str_repeat(' ', $level + 4)."No errors\n";
            }
        }

        return $errors;
    }

    /**
     * {@inheritdoc}
     */
    public function all()
    {
        return iterator_to_array($this->children);
    }

    /**
     * {@inheritdoc}
     */
    public function add($child, $type = null, array $options = array())
    {
        if ($this->submitted) {
            throw new AlreadySubmittedException('You cannot add children to a submitted form');
        }

        if (!$this->config->getCompound()) {
            throw new LogicException('You cannot add children to a simple form. Maybe you should set the option "compound" to true?');
        }

        // Obtain the view data
        $viewData = null;

        // If setData() is currently being called, there is no need to call
        // mapDataToForms() here, as mapDataToForms() is called at the end
        // of setData() anyway. Not doing this check leads to an endless
        // recursion when initializing the form lazily and an event listener
        // (such as ResizeFormListener) adds fields depending on the data:
        //
        //  * setData() is called, the form is not initialized yet
        //  * add() is called by the listener (setData() is not complete, so
        //    the form is still not initialized)
        //  * getViewData() is called
        //  * setData() is called since the form is not initialized yet
        //  * ... endless recursion ...
        //
        // Also skip data mapping if setData() has not been called yet.
        // setData() will be called upon form initialization and data mapping
        // will take place by then.
        if (!$this->lockSetData && $this->defaultDataSet && !$this->config->getInheritData()) {
            $viewData = $this->getViewData();
        }

        if (!$child instanceof FormInterface) {
            if (!is_string($child) && !is_int($child)) {
                throw new UnexpectedTypeException($child, 'string, integer or Symfony\Component\Form\FormInterface');
            }

            if (null !== $type && !is_string($type) && !$type instanceof FormTypeInterface) {
                throw new UnexpectedTypeException($type, 'string or Symfony\Component\Form\FormTypeInterface');
            }

            // Never initialize child forms automatically
            $options['auto_initialize'] = false;

            if (null === $type) {
                $child = $this->config->getFormFactory()->createForProperty($this->config->getDataClass(), $child, null, $options);
            } else {
                $child = $this->config->getFormFactory()->createNamed($child, $type, null, $options);
            }
        } elseif ($child->getConfig()->getAutoInitialize()) {
            throw new RuntimeException(sprintf(
                'Automatic initialization is only supported on root forms. You '.
                'should set the "auto_initialize" option to false on the field "%s".',
                $child->getName()
            ));
        }

        $this->children[$child->getName()] = $child;

        $child->setParent($this);

        if (!$this->lockSetData && $this->defaultDataSet && !$this->config->getInheritData()) {
            $iterator = new InheritDataAwareIterator(new \ArrayIterator(array($child)));
            $iterator = new \RecursiveIteratorIterator($iterator);
            $this->config->getDataMapper()->mapDataToForms($viewData, $iterator);
        }

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function remove($name)
    {
        if ($this->submitted) {
            throw new AlreadySubmittedException('You cannot remove children from a submitted form');
        }

        if (isset($this->children[$name])) {
            $this->children[$name]->setParent(null);

            unset($this->children[$name]);
        }

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function has($name)
    {
        return isset($this->children[$name]);
    }

    /**
     * {@inheritdoc}
     */
    public function get($name)
    {
        if (isset($this->children[$name])) {
            return $this->children[$name];
        }

        throw new OutOfBoundsException(sprintf('Child "%s" does not exist.', $name));
    }

    /**
     * Returns whether a child with the given name exists (implements the \ArrayAccess interface).
     *
     * @param string $name The name of the child
     *
     * @return Boolean
     */
    public function offsetExists($name)
    {
        return $this->has($name);
    }

    /**
     * Returns the child with the given name (implements the \ArrayAccess interface).
     *
     * @param string $name The name of the child
     *
     * @return FormInterface The child form
     *
     * @throws \OutOfBoundsException If the named child does not exist.
     */
    public function offsetGet($name)
    {
        return $this->get($name);
    }

    /**
     * Adds a child to the form (implements the \ArrayAccess interface).
     *
     * @param string        $name  Ignored. The name of the child is used.
     * @param FormInterface $child The child to be added.
     *
     * @throws AlreadySubmittedException If the form has already been submitted.
     * @throws LogicException            When trying to add a child to a non-compound form.
     *
     * @see self::add()
     */
    public function offsetSet($name, $child)
    {
        $this->add($child);
    }

    /**
     * Removes the child with the given name from the form (implements the \ArrayAccess interface).
     *
     * @param string $name The name of the child to remove
     *
     * @throws AlreadySubmittedException If the form has already been submitted.
     */
    public function offsetUnset($name)
    {
        $this->remove($name);
    }

    /**
     * Returns the iterator for this group.
     *
     * @return \Traversable
     */
    public function getIterator()
    {
        return $this->children;
    }

    /**
     * Returns the number of form children (implements the \Countable interface).
     *
     * @return integer The number of embedded form children
     */
    public function count()
    {
        return count($this->children);
    }

    /**
     * {@inheritdoc}
     */
    public function createView(FormView $parent = null)
    {
        if (null === $parent && $this->parent) {
            $parent = $this->parent->createView();
        }

        $type = $this->config->getType();
        $options = $this->config->getOptions();

        // The methods createView(), buildView() and finishView() are called
        // explicitly here in order to be able to override either of them
        // in a custom resolved form type.
        $view = $type->createView($this, $parent);

        $type->buildView($view, $this, $options);

        foreach ($this->children as $name => $child) {
            $view->children[$name] = $child->createView($view);
        }

        $type->finishView($view, $this, $options);

        return $view;
    }

    /**
     * Normalizes the value if a normalization transformer is set.
     *
     * @param mixed $value The value to transform
     *
     * @return mixed
     */
    private function modelToNorm($value)
    {
        foreach ($this->config->getModelTransformers() as $transformer) {
            $value = $transformer->transform($value);
        }

        return $value;
    }

    /**
     * Reverse transforms a value if a normalization transformer is set.
     *
     * @param string $value The value to reverse transform
     *
     * @return mixed
     */
    private function normToModel($value)
    {
        $transformers = $this->config->getModelTransformers();

        for ($i = count($transformers) - 1; $i >= 0; --$i) {
            $value = $transformers[$i]->reverseTransform($value);
        }

        return $value;
    }

    /**
     * Transforms the value if a value transformer is set.
     *
     * @param mixed $value The value to transform
     *
     * @return mixed
     */
    private function normToView($value)
    {
        // Scalar values should  be converted to strings to
        // facilitate differentiation between empty ("") and zero (0).
        // Only do this for simple forms, as the resulting value in
        // compound forms is passed to the data mapper and thus should
        // not be converted to a string before.
        if (!$this->config->getViewTransformers() && !$this->config->getCompound()) {
            return null === $value || is_scalar($value) ? (string) $value : $value;
        }

        foreach ($this->config->getViewTransformers() as $transformer) {
            $value = $transformer->transform($value);
        }

        return $value;
    }

    /**
     * Reverse transforms a value if a value transformer is set.
     *
     * @param string $value The value to reverse transform
     *
     * @return mixed
     */
    private function viewToNorm($value)
    {
        $transformers = $this->config->getViewTransformers();

        if (!$transformers) {
            return '' === $value ? null : $value;
        }

        for ($i = count($transformers) - 1; $i >= 0; --$i) {
            $value = $transformers[$i]->reverseTransform($value);
        }

        return $value;
    }
}
Name	Size	Permission
Exception	---	0755
Extension	---	0755
Guess	---	0755
Resources	---	0755
Test	---	0755
Util	---	0755
AbstractExtension.php	4885 bytes	0644
AbstractRendererEngine.php	7634 bytes	0644
AbstractType.php	1080 bytes	0644
AbstractTypeExtension.php	993 bytes	0644
Button.php	8826 bytes	0644
ButtonBuilder.php	18523 bytes	0644
ButtonTypeInterface.php	462 bytes	0644
CallbackTransformer.php	2138 bytes	0644
ClickableInterface.php	559 bytes	0644
DataMapperInterface.php	1130 bytes	0644
DataTransformerInterface.php	3159 bytes	0644
Form.php	34865 bytes	0644
FormBuilder.php	7871 bytes	0644
FormBuilderInterface.php	2335 bytes	0644
FormConfigBuilder.php	21680 bytes	0644
FormConfigBuilderInterface.php	8666 bytes	0644
FormConfigInterface.php	6437 bytes	0644
FormError.php	2563 bytes	0644
FormEvent.php	1247 bytes	0644
FormEvents.php	1140 bytes	0644
FormExtensionInterface.php	1668 bytes	0644
FormFactory.php	5225 bytes	0644
FormFactoryBuilder.php	3609 bytes	0644
FormFactoryBuilderInterface.php	3058 bytes	0644
FormFactoryInterface.php	4244 bytes	0644
FormInterface.php	8328 bytes	0644
FormRegistry.php	4753 bytes	0644
FormRegistryInterface.php	1442 bytes	0644
FormRenderer.php	11954 bytes	0644
FormRendererEngineInterface.php	7063 bytes	0644
FormRendererInterface.php	3279 bytes	0644
FormTypeExtensionInterface.php	2125 bytes	0644
FormTypeGuesserChain.php	2880 bytes	0644
FormTypeGuesserInterface.php	2170 bytes	0644
FormTypeInterface.php	3222 bytes	0644
FormView.php	3524 bytes	0644
Forms.php	5899 bytes	0644
NativeRequestHandler.php	5612 bytes	0644
PreloadedExtension.php	2317 bytes	0644
RequestHandlerInterface.php	668 bytes	0644
ResolvedFormType.php	7662 bytes	0644
ResolvedFormTypeFactory.php	658 bytes	0644
ResolvedFormTypeFactoryInterface.php	1302 bytes	0644
ResolvedFormTypeInterface.php	3307 bytes	0644
ReversedTransformer.php	1256 bytes	0644
SubmitButton.php	1137 bytes	0644
SubmitButtonBuilder.php	624 bytes	0644
SubmitButtonTypeInterface.php	474 bytes	0644
autoloader.php	334 bytes	0644
File Content: Form.php

File Content: `Form.php`
