/*

 * Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package com.sun.imageio.plugins.jpeg;

import java.util.Locale;

import javax.imageio.spi.ImageReaderSpi;

import javax.imageio.stream.ImageInputStream;

import javax.imageio.spi.IIORegistry;

import javax.imageio.spi.ServiceRegistry;

import java.io.IOException;

import javax.imageio.ImageReader;

import javax.imageio.IIOException;

public class JPEGImageReaderSpi extends ImageReaderSpi {

    private static String [] writerSpiNames =

        {"com.sun.imageio.plugins.jpeg.JPEGImageWriterSpi"};

    public JPEGImageReaderSpi() {

        super(JPEG.vendor,

              JPEG.version,

              JPEG.names,

              JPEG.suffixes,

              JPEG.MIMETypes,

              "com.sun.imageio.plugins.jpeg.JPEGImageReader",

              new Class[] { ImageInputStream.class },

              writerSpiNames,

              true,

              JPEG.nativeStreamMetadataFormatName,

              JPEG.nativeStreamMetadataFormatClassName,

              null, null,

              true,

              JPEG.nativeImageMetadataFormatName,

              JPEG.nativeImageMetadataFormatClassName,

              null, null

              );

    }

    public String getDescription(Locale locale) {

        return "Standard JPEG Image Reader";

    }

    public boolean canDecodeInput(Object source) throws IOException {

        if (!(source instanceof ImageInputStream)) {

            return false;

        }

        ImageInputStream iis = (ImageInputStream) source;

        iis.mark();

        // If the first two bytes are a JPEG SOI marker, it's probably

        // a JPEG file.  If they aren't, it definitely isn't a JPEG file.

        int byte1 = iis.read();

        int byte2 = iis.read();

        iis.reset();

        if ((byte1 == 0xFF) && (byte2 == JPEG.SOI)) {

            return true;

        }

        return false;

    }

    public ImageReader createReaderInstance(Object extension)

        throws IIOException {

        return new JPEGImageReader(this);

    }

}