org.jdal.system.SystemUtils.java Source code

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Here is the source code for org.jdal.system.SystemUtils.java

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/*
 * Copyright 2008-2011 the original author or authors.
 *
 * Licensed 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.jdal.system;

import java.awt.Desktop;
import java.io.File;
import java.io.IOException;

import javax.swing.JFileChooser;
import javax.swing.JOptionPane;

import org.apache.commons.io.FileUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * System utility library
 * 
 * @author Jose Luis Martin - (jlm@joseluismartin.info)
 */
public abstract class SystemUtils {

    private static final Log log = LogFactory.getLog(SystemUtils.class);

    public static void open(byte[] data, String extension) {
        if (data != null && Desktop.isDesktopSupported()) {
            Desktop desktop = Desktop.getDesktop();
            File file;
            try {
                file = File.createTempFile("tmp", "." + extension);
                file.deleteOnExit();
                FileUtils.writeByteArrayToFile(file, data);
                desktop.open(file);
            } catch (IOException e) {
                String message = "No ha sido posible abrir el fichero";
                JOptionPane.showMessageDialog(null, message, "Error de datos", JOptionPane.ERROR_MESSAGE);
            }
        }
    }

    public static void open(File file) {
        if (Desktop.isDesktopSupported())
            try {
                Desktop.getDesktop().open(file);
            } catch (IOException e) {
                log.error(e);
            }
    }

    public static byte[] getFileAsByteArray() {
        JFileChooser chooser = new JFileChooser();
        chooser.setMultiSelectionEnabled(false);
        if (JFileChooser.APPROVE_OPTION == chooser.showOpenDialog(null)) {
            File file = chooser.getSelectedFile();
            try {
                return FileUtils.readFileToByteArray(file);
            } catch (IOException e) {
                log.error(e);
            }
        }
        return null;
    }
}