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<?php declare(strict_types = 1);
/*
 * Copyright (c) 2020, Josef Kufner  <josef@kufner.cz>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
namespace Smalldb\ClassLocator;
class CompositeClassLocator implements ClassLocator
{
    /** @var ClassLocator[] */
    private array $classLocators = [];
    private ?BrokenClassHandlerInterface $brokenClassHandler = null;
    /**
     * @param ClassLocator[] $classLocators
     */
    public function __construct(array $classLocators = [])
    {
        foreach ($classLocators as $classLocator) {
            $this->addClassLocator($classLocator);
        }
    }
    public function setBrokenClassHandler(?BrokenClassHandlerInterface $brokenClassHandler)
    {
        $this->brokenClassHandler = $brokenClassHandler;
        foreach ($this->classLocators as $classLocator) {
            $classLocator->setBrokenClassHandler($this->brokenClassHandler);
        }
    }
    public function addClassLocator(ClassLocator $classLocator)
    {
        $this->classLocators[] = $classLocator;
        $classLocator->setBrokenClassHandler($this->brokenClassHandler);
    }
    /**
     * @return ClassLocator[]
     */
    public function getClassLocators(): array
    {
        return $this->classLocators;
    }
    public function getClasses(): \Generator
    {
        foreach ($this->classLocators as $classLocator) {
            yield from $classLocator->getClasses();
        }
    }
    public function mapClassNameToFileName(string $className): ?string
    {
        foreach ($this->classLocators as $classLocator) {
            $fileName = $classLocator->mapClassNameToFileName($className);
            if ($fileName !== null) {
                return $fileName;
            }
        }
        return null;
    }
    public function mapFileNameToClassName(string $fileName): ?string
    {
        foreach ($this->classLocators as $classLocator) {
            $className = $classLocator->mapFileNameToClassName($fileName);
            if ($className !== null) {
                return $className;
            }
        }
        return null;
    }
}