PropertyMapper.php

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<?php
namespace TYPO3\CMS\Extbase\Property;

/*                                                                        *
 * This script belongs to the Extbase framework                           *
 *                                                                        *
 * It is free software; you can redistribute it and/or modify it under    *
 * the terms of the GNU Lesser General Public License as published by the *
 * Free Software Foundation, either version 3 of the License, or (at your *
 * option) any later version.                                             *
 *                                                                        *
 * This script is distributed in the hope that it will be useful, but     *
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN-    *
 * TABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser       *
 * General Public License for more details.                               *
 *                                                                        *
 * You should have received a copy of the GNU Lesser General Public       *
 * License along with the script.                                         *
 * If not, see http://www.gnu.org/licenses/lgpl.html                      *
 *                                                                        *
 * The TYPO3 project - inspiring people to share!                         *
 *                                                                        */

use TYPO3\CMS\Extbase\Property\Exception\TargetNotFoundException;
use TYPO3\CMS\Extbase\Utility\TypeHandlingUtility;

class PropertyMapper implements \TYPO3\CMS\Core\SingletonInterface {

    protected $objectManager;

    protected $configurationBuilder;

    protected $typeConverters = array();

    protected $messages;

    public function initializeObject() {
        foreach ($GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['extbase']['typeConverters'] as $typeConverterClassName) {
            $typeConverter = $this->objectManager->get($typeConverterClassName);
            foreach ($typeConverter->getSupportedSourceTypes() as $supportedSourceType) {
                if (isset($this->typeConverters[$supportedSourceType][$typeConverter->getSupportedTargetType()][$typeConverter->getPriority()])) {
                    throw new \TYPO3\CMS\Extbase\Property\Exception\DuplicateTypeConverterException('There exist at least two converters which handle the conversion from "' . $supportedSourceType . '" to "' . $typeConverter->getSupportedTargetType() . '" with priority "' . $typeConverter->getPriority() . '": ' . get_class($this->typeConverters[$supportedSourceType][$typeConverter->getSupportedTargetType()][$typeConverter->getPriority()]) . ' and ' . get_class($typeConverter), 1297951378);
                }
                $this->typeConverters[$supportedSourceType][$typeConverter->getSupportedTargetType()][$typeConverter->getPriority()] = $typeConverter;
            }
        }
    }

    public function convert($source, $targetType, \TYPO3\CMS\Extbase\Property\PropertyMappingConfigurationInterface $configuration = NULL) {
        if ($configuration === NULL) {
            $configuration = $this->configurationBuilder->build();
        }
        $currentPropertyPath = array();
        $this->messages = new \TYPO3\CMS\Extbase\Error\Result();
        try {
            $result = $this->doMapping($source, $targetType, $configuration, $currentPropertyPath);
            if ($result instanceof \TYPO3\CMS\Extbase\Error\Error) {
                return NULL;
            }

            return $result;
        } catch (TargetNotFoundException $e) {
            throw $e;
        } catch (\Exception $e) {
            throw new \TYPO3\CMS\Extbase\Property\Exception('Exception while property mapping at property path "' . implode('.', $currentPropertyPath) . '":' . $e->getMessage(), 1297759968, $e);
        }
    }

    public function getMessages() {
        return $this->messages;
    }

    protected function doMapping($source, $targetType, \TYPO3\CMS\Extbase\Property\PropertyMappingConfigurationInterface $configuration, &$currentPropertyPath) {
        if (is_object($source)) {
            $targetType = $this->parseCompositeType($targetType);
            if ($source instanceof $targetType) {
                return $source;
            }
        }

        if ($source === NULL) {
            $source = '';
        }

        $typeConverter = $this->findTypeConverter($source, $targetType, $configuration);
        $targetType = $typeConverter->getTargetTypeForSource($source, $targetType, $configuration);

        if (!is_object($typeConverter) || !$typeConverter instanceof \TYPO3\CMS\Extbase\Property\TypeConverterInterface) {
            throw new \TYPO3\CMS\Extbase\Property\Exception\TypeConverterException('Type converter for "' . $source . '" -> "' . $targetType . '" not found.');
        }

        $convertedChildProperties = array();
        foreach ($typeConverter->getSourceChildPropertiesToBeConverted($source) as $sourcePropertyName => $sourcePropertyValue) {
            $targetPropertyName = $configuration->getTargetPropertyName($sourcePropertyName);
            if ($configuration->shouldSkip($targetPropertyName)) {
                continue;
            }

            if (!$configuration->shouldMap($targetPropertyName)) {
                if ($configuration->shouldSkipUnknownProperties()) {
                    continue;
                }
                throw new \TYPO3\CMS\Extbase\Property\Exception\InvalidPropertyMappingConfigurationException('It is not allowed to map property "' . $targetPropertyName . '". You need to use $propertyMappingConfiguration->allowProperties(\'' . $targetPropertyName . '\') to enable mapping of this property.', 1355155913);
            }

            $targetPropertyType = $typeConverter->getTypeOfChildProperty($targetType, $targetPropertyName, $configuration);

            $subConfiguration = $configuration->getConfigurationFor($targetPropertyName);

            $currentPropertyPath[] = $targetPropertyName;
            $targetPropertyValue = $this->doMapping($sourcePropertyValue, $targetPropertyType, $subConfiguration, $currentPropertyPath);
            array_pop($currentPropertyPath);
            if (!($targetPropertyValue instanceof \TYPO3\CMS\Extbase\Error\Error)) {
                $convertedChildProperties[$targetPropertyName] = $targetPropertyValue;
            }
        }
        $result = $typeConverter->convertFrom($source, $targetType, $convertedChildProperties, $configuration);

        if ($result instanceof \TYPO3\CMS\Extbase\Error\Error) {
            $this->messages->forProperty(implode('.', $currentPropertyPath))->addError($result);
        }

        return $result;
    }

    protected function findTypeConverter($source, $targetType, \TYPO3\CMS\Extbase\Property\PropertyMappingConfigurationInterface $configuration) {
        if ($configuration->getTypeConverter() !== NULL) {
            return $configuration->getTypeConverter();
        }

        $sourceType = $this->determineSourceType($source);

        if (!is_string($targetType)) {
            throw new \TYPO3\CMS\Extbase\Property\Exception\InvalidTargetException('The target type was no string, but of type "' . gettype($targetType) . '"', 1297941727);
        }

        $targetType = $this->parseCompositeType($targetType);
        // This is needed to correctly convert old class names to new ones
        // This compatibility layer will be removed with 7.0
        $targetType = \TYPO3\CMS\Core\Core\ClassLoader::getClassNameForAlias($targetType);

        $targetType = TypeHandlingUtility::normalizeType($targetType);

        $converter = NULL;

        if (TypeHandlingUtility::isSimpleType($targetType)) {
            if (isset($this->typeConverters[$sourceType][$targetType])) {
                $converter = $this->findEligibleConverterWithHighestPriority($this->typeConverters[$sourceType][$targetType], $source, $targetType);
            }
        } else {
            $converter = $this->findFirstEligibleTypeConverterInObjectHierarchy($source, $sourceType, $targetType);
        }

        if ($converter === NULL) {
            throw new \TYPO3\CMS\Extbase\Property\Exception\TypeConverterException('No converter found which can be used to convert from "' . $sourceType . '" to "' . $targetType . '".');
        }

        return $converter;
    }

    protected function findFirstEligibleTypeConverterInObjectHierarchy($source, $sourceType, $targetClass) {
        if (!class_exists($targetClass) && !interface_exists($targetClass)) {
            throw new \TYPO3\CMS\Extbase\Property\Exception\InvalidTargetException('Could not find a suitable type converter for "' . $targetClass . '" because no such class or interface exists.', 1297948764);
        }

        if (!isset($this->typeConverters[$sourceType])) {
            return NULL;
        }

        $convertersForSource = $this->typeConverters[$sourceType];
        if (isset($convertersForSource[$targetClass])) {
            $converter = $this->findEligibleConverterWithHighestPriority($convertersForSource[$targetClass], $source, $targetClass);
            if ($converter !== NULL) {
                return $converter;
            }
        }

        foreach (class_parents($targetClass) as $parentClass) {
            if (!isset($convertersForSource[$parentClass])) {
                continue;
            }

            $converter = $this->findEligibleConverterWithHighestPriority($convertersForSource[$parentClass], $source, $targetClass);
            if ($converter !== NULL) {
                return $converter;
            }
        }

        $converters = $this->getConvertersForInterfaces($convertersForSource, class_implements($targetClass));
        $converter = $this->findEligibleConverterWithHighestPriority($converters, $source, $targetClass);

        if ($converter !== NULL) {
            return $converter;
        }
        if (isset($convertersForSource['object'])) {
            return $this->findEligibleConverterWithHighestPriority($convertersForSource['object'], $source, $targetClass);
        } else {
            return NULL;
        }
    }

    protected function findEligibleConverterWithHighestPriority($converters, $source, $targetType) {
        if (!is_array($converters)) {
            return NULL;
        }
        krsort($converters);
        reset($converters);
        foreach ($converters as $converter) {
            if ($converter->canConvertFrom($source, $targetType)) {
                return $converter;
            }
        }
        return NULL;
    }

    protected function getConvertersForInterfaces(array $convertersForSource, array $interfaceNames) {
        $convertersForInterface = array();
        foreach ($interfaceNames as $implementedInterface) {
            if (isset($convertersForSource[$implementedInterface])) {
                foreach ($convertersForSource[$implementedInterface] as $priority => $converter) {
                    if (isset($convertersForInterface[$priority])) {
                        throw new \TYPO3\CMS\Extbase\Property\Exception\DuplicateTypeConverterException('There exist at least two converters which handle the conversion to an interface with priority "' . $priority . '". ' . get_class($convertersForInterface[$priority]) . ' and ' . get_class($converter), 1297951338);
                    }
                    $convertersForInterface[$priority] = $converter;
                }
            }
        }
        return $convertersForInterface;
    }

    protected function determineSourceType($source) {
        if (is_string($source)) {
            return 'string';
        } elseif (is_array($source)) {
            return 'array';
        } elseif (is_float($source)) {
            return 'float';
        } elseif (is_integer($source)) {
            return 'integer';
        } elseif (is_bool($source)) {
            return 'boolean';
        } else {
            throw new \TYPO3\CMS\Extbase\Property\Exception\InvalidSourceException('The source is not of type string, array, float, integer or boolean, but of type "' . gettype($source) . '"', 1297773150);
        }
    }

    public function parseCompositeType($compositeType) {
        if (strpos($compositeType, '<') !== FALSE) {
            $compositeType = substr($compositeType, 0, strpos($compositeType, '<'));
        }
        return $compositeType;
    }

}