Java tutorial
/* * Copyright (c) 2008 Los Alamos National Security, LLC. * * Los Alamos National Laboratory * Research Library * Digital Library Research & Prototyping Team * * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * */ package gov.lanl.adore.djatoka; import org.apache.commons.cli.CommandLine; import org.apache.commons.cli.CommandLineParser; import org.apache.commons.cli.HelpFormatter; import org.apache.commons.cli.Options; import org.apache.commons.cli.ParseException; import org.apache.commons.cli.PosixParser; import org.apache.log4j.Logger; import gov.lanl.adore.djatoka.kdu.KduExtractExe; /** * Extraction Application * @author Ryan Chute * */ public class DjatokaExtract { static Logger logger = Logger.getLogger(DjatokaExtract.class); /** * Uses apache commons cli to parse input args. Passes parsed * parameters to IExtract implementation. * @param args command line parameters to defined input,output,etc. */ public static void main(String[] args) { // create the command line parser CommandLineParser parser = new PosixParser(); // create the Options Options options = new Options(); options.addOption("i", "input", true, "Filepath of the input file."); options.addOption("o", "output", true, "Filepath of the output file."); options.addOption("l", "level", true, "Resolution level to extract."); options.addOption("d", "reduce", true, "Resolution levels to subtract from max resolution."); options.addOption("r", "region", true, "Format: Y,X,H,W. "); options.addOption("c", "cLayer", true, "Compositing Layer Index."); options.addOption("s", "scale", true, "Format: Option 1. Define a long-side dimension (e.g. 96); Option 2. Define absolute w,h values (e.g. 1024,768); Option 3. Define a single dimension (e.g. 1024,0) with or without Level Parameter; Option 4. Use a single decimal scaling factor (e.g. 0.854)"); options.addOption("t", "rotate", true, "Number of degrees to rotate image (i.e. 90, 180, 270)."); options.addOption("f", "format", true, "Mimetype of the image format to be provided as response. Default: image/jpeg"); options.addOption("a", "AltImpl", true, "Alternate IExtract Implemenation"); try { if (args.length == 0) { HelpFormatter formatter = new HelpFormatter(); formatter.printHelp("gov.lanl.adore.djatoka.DjatokaExtract", options); System.exit(0); } // parse the command line arguments CommandLine line = parser.parse(options, args); String input = line.getOptionValue("i"); String output = line.getOptionValue("o"); DjatokaDecodeParam p = new DjatokaDecodeParam(); String level = line.getOptionValue("l"); if (level != null) p.setLevel(Integer.parseInt(level)); String reduce = line.getOptionValue("d"); if (level == null && reduce != null) p.setLevelReductionFactor(Integer.parseInt(reduce)); String region = line.getOptionValue("r"); if (region != null) p.setRegion(region); String cl = line.getOptionValue("c"); if (cl != null) { int clayer = Integer.parseInt(cl); if (clayer > 0) p.setCompositingLayer(clayer); } String scale = line.getOptionValue("s"); if (scale != null) { String[] v = scale.split(","); if (v.length == 1) { if (v[0].contains(".")) p.setScalingFactor(Double.parseDouble(v[0])); else { int[] dims = new int[] { -1, Integer.parseInt(v[0]) }; p.setScalingDimensions(dims); } } else if (v.length == 2) { int[] dims = new int[] { Integer.parseInt(v[0]), Integer.parseInt(v[1]) }; p.setScalingDimensions(dims); } } String rotate = line.getOptionValue("t"); if (rotate != null) p.setRotationDegree(Integer.parseInt(rotate)); String format = line.getOptionValue("f"); if (format == null) format = "image/jpeg"; String alt = line.getOptionValue("a"); if (output == null) output = input + ".jpg"; long x = System.currentTimeMillis(); IExtract ex = new KduExtractExe(); if (alt != null) ex = (IExtract) Class.forName(alt).newInstance(); DjatokaExtractProcessor e = new DjatokaExtractProcessor(ex); e.extractImage(input, output, p, format); logger.info("Extraction Time: " + ((double) (System.currentTimeMillis() - x) / 1000) + " seconds"); } catch (ParseException e) { logger.error("Parse exception:" + e.getMessage(), e); } catch (DjatokaException e) { logger.error("djatoka Extraction exception:" + e.getMessage(), e); } catch (InstantiationException e) { logger.error("Unable to initialize alternate implemenation:" + e.getMessage(), e); } catch (Exception e) { logger.error("Unexpected exception:" + e.getMessage(), e); } } }