trunk/tika-parsers/src/main/java/org/apache/tika/parser/jpeg/JpegParser.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */
package org.apache.tika.parser.jpeg;

import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.Set;

import org.apache.tika.exception.TikaException;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.mime.MediaType;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.parser.Parser;
import org.apache.tika.parser.image.ImageMetadataExtractor;
import org.apache.tika.parser.image.xmp.JempboxExtractor;
import org.apache.tika.sax.XHTMLContentHandler;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;

public class JpegParser implements Parser {

    private static final Set<MediaType> SUPPORTED_TYPES =
        Collections.singleton(MediaType.image("jpeg"));

    public Set<MediaType> getSupportedTypes(ParseContext context) {
        return SUPPORTED_TYPES;
    }

    /**
     * @deprecated This method will be removed in Apache Tika 1.0.
     */
    public void parse(
            InputStream stream, ContentHandler handler, Metadata metadata)
            throws IOException, SAXException, TikaException {
        parse(stream, handler, metadata, new ParseContext());
    }

    public void parse(
            InputStream stream, ContentHandler handler,
            Metadata metadata, ParseContext context)
            throws IOException, SAXException, TikaException {
        
        // read stream twice - exif and xmp extractors
        stream.mark(Integer.MAX_VALUE);
        FilterInputStream first = new FilterInputStream(stream) {
            @Override
            public void close() throws IOException {
            }
        };
        new ImageMetadataExtractor(metadata).parseJpeg(first);
        stream.reset();
        
        new JempboxExtractor(metadata).parse(stream);

        XHTMLContentHandler xhtml = new XHTMLContentHandler(handler, metadata);
        xhtml.startDocument();
        xhtml.endDocument();
    }

}