001 /*
002 * Copyright 2002 - 2008 JEuclid, http://jeuclid.sf.net
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017 /* $Id: ImageLoaderMathML.java,v 70597ba9d706 2008/02/18 19:42:05 maxberger $ */
018
019 package net.sourceforge.jeuclid.xmlgraphics;
020
021 import java.io.IOException;
022 import java.util.Map;
023
024 import net.sourceforge.jeuclid.Constants;
025 import net.sourceforge.jeuclid.elements.AbstractJEuclidElement;
026
027 import org.apache.xmlgraphics.image.loader.Image;
028 import org.apache.xmlgraphics.image.loader.ImageException;
029 import org.apache.xmlgraphics.image.loader.ImageFlavor;
030 import org.apache.xmlgraphics.image.loader.ImageInfo;
031 import org.apache.xmlgraphics.image.loader.ImageSessionContext;
032 import org.apache.xmlgraphics.image.loader.impl.AbstractImageLoader;
033 import org.apache.xmlgraphics.image.loader.impl.ImageXMLDOM;
034
035 /**
036 * @version $Revision: 70597ba9d706 $
037 */
038 public class ImageLoaderMathML extends AbstractImageLoader {
039
040 private final ImageFlavor targetFlavor;
041
042 /**
043 * Main constructor.
044 *
045 * @param target
046 * the target flavor
047 */
048 public ImageLoaderMathML(final ImageFlavor target) {
049 if (!(ImageFlavor.XML_DOM.equals(target))) {
050 throw new IllegalArgumentException(
051 "Unsupported target ImageFlavor: " + target);
052 }
053 this.targetFlavor = target;
054 }
055
056 /** {@inheritDoc} */
057 public ImageFlavor getTargetFlavor() {
058 return this.targetFlavor;
059 }
060
061 /** {@inheritDoc} */
062 @SuppressWarnings("unchecked")
063 public Image loadImage(final ImageInfo info, final Map hints,
064 final ImageSessionContext session) throws ImageException,
065 IOException {
066 if (!Constants.MATHML_MIMETYPE.equals(info.getMimeType())) {
067 throw new IllegalArgumentException(
068 "ImageInfo must be from an MathML image");
069 }
070 final Image img = info.getOriginalImage();
071 if (!(img instanceof ImageXMLDOM)) {
072 throw new IllegalArgumentException(
073 "ImageInfo was expected to contain the MathML document as DOM");
074 }
075 final ImageXMLDOM mmlImage = (ImageXMLDOM) img;
076 if (!AbstractJEuclidElement.URI.equals(mmlImage.getRootNamespace())) {
077 throw new IllegalArgumentException(
078 "The Image is not in the MathML namespace: "
079 + mmlImage.getRootNamespace());
080 }
081 return mmlImage;
082 }
083 }