Java tutorial
/* Copyright 2008-2010 Gephi Authors : Patick J. McSweeney <pjmcswee@syr.edu>, Mathieu Bastian <mathieu.bastian@gephi.org> Website : http://www.gephi.org This file is part of Gephi. DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. Copyright 2011 Gephi Consortium. All rights reserved. The contents of this file are subject to the terms of either the GNU General Public License Version 3 only ("GPL") or the Common Development and Distribution License("CDDL") (collectively, the "License"). You may not use this file except in compliance with the License. You can obtain a copy of the License at http://gephi.org/about/legal/license-notice/ or /cddl-1.0.txt and /gpl-3.0.txt. See the License for the specific language governing permissions and limitations under the License. When distributing the software, include this License Header Notice in each file and include the License files at /cddl-1.0.txt and /gpl-3.0.txt. 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Contributor(s): Portions Copyrighted 2011 Gephi Consortium. */ package org.gephi.statistics; import java.awt.image.BufferedImage; import java.awt.image.RenderedImage; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.util.Collection; import java.util.HashMap; import java.util.Map; import javax.imageio.ImageIO; import javax.xml.stream.XMLStreamException; import javax.xml.stream.XMLStreamReader; import javax.xml.stream.XMLStreamWriter; import org.apache.commons.codec.binary.Base64; import org.gephi.statistics.spi.Statistics; import org.gephi.statistics.api.StatisticsModel; import org.gephi.statistics.spi.StatisticsBuilder; import org.gephi.statistics.spi.StatisticsUI; import org.gephi.utils.TempDirUtils; import org.gephi.utils.TempDirUtils.TempDir; import org.openide.util.Lookup; /** * * @author Mathieu Bastian * @author Patrick J. McSweeney */ public class StatisticsModelImpl implements StatisticsModel { //Model private final Map<Class, String> reportMap; public StatisticsModelImpl() { reportMap = new HashMap<Class, String>(); } public void addReport(Statistics statistics) { reportMap.put(statistics.getClass(), statistics.getReport()); } public String getReport(Class<? extends Statistics> statisticsClass) { return reportMap.get(statisticsClass); } public void writeXML(XMLStreamWriter writer) throws XMLStreamException { writer.writeStartElement("statisticsmodel"); writer.writeStartElement("reports"); for (Map.Entry<Class, String> entry : reportMap.entrySet()) { if (entry.getValue() != null && !entry.getValue().isEmpty()) { writer.writeStartElement("report"); String report = entry.getValue(); report = embedImages(report); writer.writeAttribute("class", entry.getKey().getName()); writer.writeAttribute("value", report); writer.writeEndElement(); } } writer.writeEndElement(); writer.writeEndElement(); } public void readXML(XMLStreamReader reader) throws XMLStreamException { Collection<? extends StatisticsUI> uis = Lookup.getDefault().lookupAll(StatisticsUI.class); Collection<? extends StatisticsBuilder> builders = Lookup.getDefault().lookupAll(StatisticsBuilder.class); boolean end = false; while (reader.hasNext() && !end) { int type = reader.next(); switch (type) { case XMLStreamReader.START_ELEMENT: String name = reader.getLocalName(); if ("report".equalsIgnoreCase(name)) { String classStr = reader.getAttributeValue(null, "class"); Class reportClass = null; for (StatisticsBuilder builder : builders) { if (builder.getStatisticsClass().getName().equals(classStr)) { reportClass = builder.getStatisticsClass(); } } if (reportClass != null) { String report = reader.getAttributeValue(null, "value"); report = unembedImages(report); reportMap.put(reportClass, report); } } break; case XMLStreamReader.END_ELEMENT: if ("statisticsmodel".equalsIgnoreCase(reader.getLocalName())) { end = true; } break; } } } private String unembedImages(String report) { StringBuilder builder = new StringBuilder(); String[] result = report.split("data:image/png;base64"); if (result.length == 0) { return report; } try { TempDir tempDir = TempDirUtils.createTempDir(); for (int i = 0; i < result.length; i++) { if (result[i].contains("</IMG>")) { String next = result[i]; int endIndex = next.indexOf('\"'); String pngStr = next.substring(0, endIndex); byte[] imageBytes = Base64.decodeBase64(pngStr); String fileName = "image" + i + ".png"; File file = tempDir.createFile(fileName); FileOutputStream fos = new FileOutputStream(file); fos.write(imageBytes); String path = "file:" + file.getAbsolutePath(); builder.append(path); builder.append(next.substring(endIndex, next.length())); } else { builder.append(result[i]); } } } catch (IOException ex) { ex.printStackTrace(); } return builder.toString(); } private String embedImages(String report) { StringBuilder builder = new StringBuilder(); String[] result = report.split("file:"); boolean first = true; for (int i = 0; i < result.length; i++) { if (result[i].contains("</IMG>")) { String next = result[i]; String[] elements = next.split("\""); String filename = elements[0]; ByteArrayOutputStream out = new ByteArrayOutputStream(); File file = new File(filename); try { BufferedImage image = ImageIO.read(file); ImageIO.write((RenderedImage) image, "PNG", out); } catch (Exception e) { e.printStackTrace(); } byte[] imageBytes = out.toByteArray(); String base64String = Base64.encodeBase64String(imageBytes); if (!first) { builder.append("\""); } first = false; builder.append("data:image/png;base64,"); builder.append(base64String); for (int j = 1; j < elements.length; j++) { builder.append("\""); builder.append(elements[j]); } } else { builder.append(result[i]); } } return builder.toString(); } }