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<?php

/*
 * This file is part of the Imagine package.
 *
 * (c) Bulat Shakirzyanov <mallluhuct@gmail.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Imagine\Image\Metadata;

/**
 * Interface that metadata readers must implement.
 */
interface MetadataReaderInterface
{
    /**
     * Reads metadata from a file.
     *
     * @param string|\Imagine\File\LoaderInterface $file the path to the file where to read metadata
     *
     * @throws \Imagine\Exception\InvalidArgumentException in case the file does not exist
     *
     * @return \Imagine\Image\Metadata\MetadataBag
     */
    public function readFile($file);

/**
     * Reads metadata from a binary string.
     *
     * @param string $data the binary string to read
     * @param resource $originalResource an optional resource to gather stream metadata
     *
     * @return \Imagine\Image\Metadata\MetadataBag
     */
    public function readData($data, $originalResource = null);

/**
     * Reads metadata from a stream.
     *
     * @param resource $resource the stream to read
     *
     * @throws \Imagine\Exception\InvalidArgumentException in case the resource is not valid
     *
     * @return \Imagine\Image\Metadata\MetadataBag
     */
    public function readStream($resource);
}