org.jpedal.io.JAIHelper Maven / Gradle / Ivy
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/*
* ===========================================
* Java Pdf Extraction Decoding Access Library
* ===========================================
*
* Project Info: http://www.idrsolutions.com
* Help section for developers at http://www.idrsolutions.com/java-pdf-library-support/
*
* (C) Copyright 1997-2013, IDRsolutions and Contributors.
*
* This file is part of JPedal
*
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
*
* ---------------
* JAIHelper.java
* ---------------
*/
package org.jpedal.io;
import java.io.IOException;
import javax.swing.JEditorPane;
import javax.swing.JOptionPane;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;
import org.jpedal.PdfDecoder;
import org.jpedal.utils.BrowserLauncher;
import org.jpedal.utils.LogWriter;
import org.jpedal.utils.Messages;
public class JAIHelper {
private static boolean JAI_TESTED;
private static boolean useJAI = false;
private static boolean isJAIFound = false;
static {
String JAIflag = System.getProperty("org.jpedal.jai");
if (JAIflag != null && JAIflag.toLowerCase().equals("true")) useJAI = true;
}
public static void confirmJAIOnClasspath() {
if (JAI_TESTED) return;
JAIHelper.JAI_TESTED = true;
if (useJAI) {
// test
try {
Class.forName("javax.media.jai.JAI");
isJAIFound = true;
}
catch (ClassNotFoundException e) {
if (PdfDecoder.showErrorMessages) {
String message = Messages.getMessage("PdfViewer.JAINotOnClasspathWarning")
+ Messages.getMessage("PdfViewer.JAINotOnClasspathWarning1") + Messages.getMessage("PdfViewer.JAINotOnClasspathWarning2");
// hack for tableZoner
if (message.contains("PdfViewer")) message = "We recommend you add JAI to classpath";
JEditorPane p = new JEditorPane("text/html", message);
p.setEditable(false);
p.setOpaque(false);
p.addHyperlinkListener(new HyperlinkListener() {
@Override
public void hyperlinkUpdate(HyperlinkEvent e) {
if (e.getEventType().equals(HyperlinkEvent.EventType.ACTIVATED)) {
try {
BrowserLauncher.openURL("http://java.sun.com/products/java-media/jai/current.html");
}
catch (IOException e1) {
if (PdfDecoder.showErrorMessages) JOptionPane.showMessageDialog(null,
Messages.getMessage("PdfViewer.ErrorWebsite"));
// tell user and log
if (LogWriter.isOutput()) LogWriter.writeLog("Exception: " + e1.getMessage());
}
}
}
});
if (PdfDecoder.showErrorMessages) JOptionPane.showMessageDialog(null, p);
}
}
}
}
public static boolean isJAIused() {
return useJAI;
}
public static boolean isJAIOnClasspath() {
if (!isJAIFound) { // already found so just return
// test
String classpath = System.getProperty("java.class.path");
if (classpath.contains("jai")) isJAIFound = true;
}
return isJAIFound;
}
public static void useJAI(boolean use) {
useJAI = use;
JAI_TESTED = false; // make sure retested
}
}