Viewing file:  OptionsResolver.php (9.3 KB) -rw-r--r--
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<?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\OptionsResolver;
use Symfony\Component\OptionsResolver\Exception\OptionDefinitionException;
use Symfony\Component\OptionsResolver\Exception\InvalidOptionsException;
use Symfony\Component\OptionsResolver\Exception\MissingOptionsException;
/**
* Helper for merging default and concrete option values.
*
* @author Bernhard Schussek <bschussek@gmail.com>
* @author Tobias Schultze <http://tobion.de>
*/
class OptionsResolver implements OptionsResolverInterface
{
/**
* The default option values.
* @var Options
*/
private $defaultOptions;
/**
* The options known by the resolver.
* @var array
*/
private $knownOptions = array();
/**
* The options without defaults that are required to be passed to resolve().
* @var array
*/
private $requiredOptions = array();
/**
* A list of accepted values for each option.
* @var array
*/
private $allowedValues = array();
/**
* A list of accepted types for each option.
* @var array
*/
private $allowedTypes = array();
/**
* Creates a new instance.
*/
public function __construct()
{
$this->defaultOptions = new Options();
}
/**
* Clones the resolver.
*/
public function __clone()
{
$this->defaultOptions = clone $this->defaultOptions;
}
/**
* {@inheritdoc}
*/
public function setDefaults(array $defaultValues)
{
foreach ($defaultValues as $option => $value) {
$this->defaultOptions->overload($option, $value);
$this->knownOptions[$option] = true;
unset($this->requiredOptions[$option]);
}
return $this;
}
/**
* {@inheritdoc}
*/
public function replaceDefaults(array $defaultValues)
{
foreach ($defaultValues as $option => $value) {
$this->defaultOptions->set($option, $value);
$this->knownOptions[$option] = true;
unset($this->requiredOptions[$option]);
}
return $this;
}
/**
* {@inheritdoc}
*/
public function setOptional(array $optionNames)
{
foreach ($optionNames as $key => $option) {
if (!is_int($key)) {
throw new OptionDefinitionException('You should not pass default values to setOptional()');
}
$this->knownOptions[$option] = true;
}
return $this;
}
/**
* {@inheritdoc}
*/
public function setRequired(array $optionNames)
{
foreach ($optionNames as $key => $option) {
if (!is_int($key)) {
throw new OptionDefinitionException('You should not pass default values to setRequired()');
}
$this->knownOptions[$option] = true;
// set as required if no default has been set already
if (!isset($this->defaultOptions[$option])) {
$this->requiredOptions[$option] = true;
}
}
return $this;
}
/**
* {@inheritdoc}
*/
public function setAllowedValues(array $allowedValues)
{
$this->validateOptionsExistence($allowedValues);
$this->allowedValues = array_replace($this->allowedValues, $allowedValues);
return $this;
}
/**
* {@inheritdoc}
*/
public function addAllowedValues(array $allowedValues)
{
$this->validateOptionsExistence($allowedValues);
$this->allowedValues = array_merge_recursive($this->allowedValues, $allowedValues);
return $this;
}
/**
* {@inheritdoc}
*/
public function setAllowedTypes(array $allowedTypes)
{
$this->validateOptionsExistence($allowedTypes);
$this->allowedTypes = array_replace($this->allowedTypes, $allowedTypes);
return $this;
}
/**
* {@inheritdoc}
*/
public function addAllowedTypes(array $allowedTypes)
{
$this->validateOptionsExistence($allowedTypes);
$this->allowedTypes = array_merge_recursive($this->allowedTypes, $allowedTypes);
return $this;
}
/**
* {@inheritdoc}
*/
public function setNormalizers(array $normalizers)
{
$this->validateOptionsExistence($normalizers);
foreach ($normalizers as $option => $normalizer) {
$this->defaultOptions->setNormalizer($option, $normalizer);
}
return $this;
}
/**
* {@inheritdoc}
*/
public function isKnown($option)
{
return isset($this->knownOptions[$option]);
}
/**
* {@inheritdoc}
*/
public function isRequired($option)
{
return isset($this->requiredOptions[$option]);
}
/**
* {@inheritdoc}
*/
public function resolve(array $options = array())
{
$this->validateOptionsExistence($options);
$this->validateOptionsCompleteness($options);
// Make sure this method can be called multiple times
$combinedOptions = clone $this->defaultOptions;
// Override options set by the user
foreach ($options as $option => $value) {
$combinedOptions->set($option, $value);
}
// Resolve options
$resolvedOptions = $combinedOptions->all();
$this->validateOptionValues($resolvedOptions);
$this->validateOptionTypes($resolvedOptions);
return $resolvedOptions;
}
/**
* Validates that the given option names exist and throws an exception
* otherwise.
*
* @param array $options An list of option names as keys.
*
* @throws InvalidOptionsException If any of the options has not been defined.
*/
private function validateOptionsExistence(array $options)
{
$diff = array_diff_key($options, $this->knownOptions);
if (count($diff) > 0) {
ksort($this->knownOptions);
ksort($diff);
throw new InvalidOptionsException(sprintf(
(count($diff) > 1 ? 'The options "%s" do not exist.' : 'The option "%s" does not exist.').' Known options are: "%s"',
implode('", "', array_keys($diff)),
implode('", "', array_keys($this->knownOptions))
));
}
}
/**
* Validates that all required options are given and throws an exception
* otherwise.
*
* @param array $options An list of option names as keys.
*
* @throws MissingOptionsException If a required option is missing.
*/
private function validateOptionsCompleteness(array $options)
{
$diff = array_diff_key($this->requiredOptions, $options);
if (count($diff) > 0) {
ksort($diff);
throw new MissingOptionsException(sprintf(
count($diff) > 1 ? 'The required options "%s" are missing.' : 'The required option "%s" is missing.',
implode('", "', array_keys($diff))
));
}
}
/**
* Validates that the given option values match the allowed values and
* throws an exception otherwise.
*
* @param array $options A list of option values.
*
* @throws InvalidOptionsException If any of the values does not match the
* allowed values of the option.
*/
private function validateOptionValues(array $options)
{
foreach ($this->allowedValues as $option => $allowedValues) {
if (isset($options[$option]) && !in_array($options[$option], $allowedValues, true)) {
throw new InvalidOptionsException(sprintf('The option "%s" has the value "%s", but is expected to be one of "%s"', $option, $options[$option], implode('", "', $allowedValues)));
}
}
}
/**
* Validates that the given options match the allowed types and
* throws an exception otherwise.
*
* @param array $options A list of options.
*
* @throws InvalidOptionsException If any of the types does not match the
* allowed types of the option.
*/
private function validateOptionTypes(array $options)
{
foreach ($this->allowedTypes as $option => $allowedTypes) {
if (!array_key_exists($option, $options)) {
continue;
}
$value = $options[$option];
$allowedTypes = (array) $allowedTypes;
foreach ($allowedTypes as $type) {
$isFunction = 'is_'.$type;
if (function_exists($isFunction) && $isFunction($value)) {
continue 2;
} elseif ($value instanceof $type) {
continue 2;
}
}
$printableValue = is_object($value)
? get_class($value)
: (is_array($value)
? 'Array'
: (string) $value);
throw new InvalidOptionsException(sprintf(
'The option "%s" with value "%s" is expected to be of type "%s"',
$option,
$printableValue,
implode('", "', $allowedTypes)
));
}
}
}
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