Java tutorial
/* * 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.pdfbox.filter; import java.awt.image.BufferedImage; import java.awt.image.DataBuffer; import java.awt.image.DataBufferByte; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import javax.imageio.ImageIO; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.pdfbox.cos.COSDictionary; /** * This is used for the JPXDecode filter. * * @author <a href="mailto:timo.boehme@ontochem.com">Timo Bhme</a> * */ public class JPXFilter implements Filter { /** Log instance. */ private static final Log log = LogFactory.getLog(JPXFilter.class); /** * Decode JPEG2000 data using Java ImageIO library. * * {@inheritDoc} * */ public void decode(InputStream compressedData, OutputStream result, COSDictionary options, int filterIndex) throws IOException { BufferedImage bi = ImageIO.read(compressedData); if (bi != null) { DataBuffer dBuf = bi.getData().getDataBuffer(); if (dBuf.getDataType() == DataBuffer.TYPE_BYTE) { result.write(((DataBufferByte) dBuf).getData()); } else { log.error("Image data buffer not of type byte but type " + dBuf.getDataType()); } } } /** * {@inheritDoc} */ public void encode(InputStream rawData, OutputStream result, COSDictionary options, int filterIndex) throws IOException { System.err.println("Warning: JPXFilter.encode is not implemented yet, skipping this stream."); } }