/** * ================================================ * LibLoader : a free Java resource loading library * ================================================ * * Project Info: http://reporting.pentaho.org/libloader/ * * (C) Copyright 2006, by Pentaho Corporation and Contributors. * * This library is free software; you can redistribute it and/or modify it under the terms * of the GNU Lesser General Public License as published by the Free Software Foundation; * either version 2.1 of the License, or (at your option) any later version. * * This library 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License along with this * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, * Boston, MA 02111-1307, USA. * * [Java is a trademark or registered trademark of Sun Microsystems, Inc. * in the United States and other countries.] * * * ------------ * $Id: JPEGImageFactoryModule.java 3520 2007-10-16 10:34:47Z tmorgner $ * ------------ * (C) Copyright 2006, by Pentaho Corporation. */ package org.jfree.resourceloader.factory.image; import java.awt.Image; import java.awt.Toolkit; import java.io.InputStream; import java.io.IOException; import org.jfree.resourceloader.factory.AbstractFactoryModule; import org.jfree.resourceloader.Resource; import org.jfree.resourceloader.ResourceData; import org.jfree.resourceloader.ResourceLoadingException; import org.jfree.resourceloader.SimpleResource; import org.jfree.resourceloader.ResourceKey; import org.jfree.resourceloader.ResourceManager; /** * Creation-Date: 05.04.2006, 17:35:12 * * @author Thomas Morgner */ 00051 public class JPEGImageFactoryModule extends AbstractFactoryModule { private static final int[] FINGERPRINT_1 = {0xFF, 0xD8, 0xFF, 0xE0}; private static final int[] FINGERPRINT_2 = {0x4A, 0x46, 0x49, 0x46, 0x00}; private static final String[] MIMETYPES = { "image/jpeg", "image/jpg", "image/jp_", "application/jpg", "application/x-jpg", "image/pjpeg", "image/pipeg", "image/vnd.swiftview-jpeg", "image/x-xbitmap" }; private static final String[] FILEEXTENSIONS = { ".jpg", ".jpeg" }; private static final int[] EMPTY_ARRAY = new int[0]; public JPEGImageFactoryModule() { } public int getHeaderFingerprintSize () { return -1; } protected boolean canHandleResourceByContent(final InputStream data) throws IOException { int[] fingerprint = FINGERPRINT_1; for (int i = 0; i < fingerprint.length; i++) { if (fingerprint[i] != data.read()) { return false; } } if (data.read() == -1) { return false; } if (data.read() == -1) { return false; } fingerprint = FINGERPRINT_2; for (int i = 0; i < fingerprint.length; i++) { if (fingerprint[i] != data.read()) { return false; } } return true; } protected int[] getFingerPrint() { return EMPTY_ARRAY; } protected String[] getMimeTypes() { return JPEGImageFactoryModule.MIMETYPES; } protected String[] getFileExtensions() { return JPEGImageFactoryModule.FILEEXTENSIONS; } public Resource create(final ResourceManager caller, final ResourceData data, final ResourceKey context) throws ResourceLoadingException { final long version = data.getVersion(caller); final Image image = Toolkit.getDefaultToolkit().createImage(data.getResource(caller)); return new SimpleResource (data.getKey(), image, version); } }