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/*
* 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.
*/
/* $Id$ */
package org.apache.fop.image.analyser;
// Java
import java.io.InputStream;
import java.io.IOException;
import java.util.ArrayList;
// FOP
import org.apache.fop.image.FopImage;
import org.apache.fop.apps.FOUserAgent;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Factory for ImageReader objects.
*
* @author Pankaj Narula
* @version $Id$
*/
public class ImageReaderFactory {
private static ArrayList formats = new ArrayList();
protected static Log log = LogFactory.getLog(ImageReaderFactory.class);
static {
registerFormat(new JPEGReader());
registerFormat(new BMPReader());
registerFormat(new GIFReader());
registerFormat(new PNGReader());
registerFormat(new TIFFReader());
registerFormat(new EPSReader());
registerFormat(new EMFReader());
// the xml parser through batik closes the stream when finished
// so there is a workaround in the SVGReader
registerFormat(new SVGReader());
registerFormat(new XMLReader());
}
/**
* Registers a new ImageReader.
*
* @param reader An ImageReader instance
*/
public static void registerFormat(ImageReader reader) {
formats.add(reader);
}
/**
* ImageReader maker.
*
* @param uri URI to the image
* @param in image input stream
* @param ua user agent
* @return An ImageInfo object describing the image
*/
public static FopImage.ImageInfo make(String uri, InputStream in,
FOUserAgent ua) {
ImageReader reader;
try {
for (int count = 0; count < formats.size(); count++) {
reader = (ImageReader) formats.get(count);
FopImage.ImageInfo info = reader.verifySignature(uri, in, ua);
if (info != null) {
return info;
}
}
} catch (IOException ex) {
log.error("Error while recovering Image Informations ("
+ uri + ")", ex);
}
return null;
}
}
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