Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 3

 * of the License, or (at your option) any later version.

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.desktop.installer.izpack;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import com.izforge.izpack.panels.process.AbstractUIProcessHandler;

import java.io.Closeable;

import java.io.FileInputStream;

import java.nio.channels.FileChannel;

/*

 * Based on portions of code from clases IOUtils and FileUtils 

 * of the project org.apache.commons.io of the Apache Software Foundation (ASF)

 *

 * http://svn.apache.org/viewvc/commons/proper/io/tags/commons-io-2.5/src/main/java/org/apache/commons/io/FileUtils.java?view=markup

 * http://svn.apache.org/viewvc/commons/proper/io/tags/commons-io-2.5/src/main/java/org/apache/commons/io/IOUtils.java?view=markup

 */

public class CopyJRE {

    public boolean run(AbstractUIProcessHandler handler, String[] args) {

        File java_home = new File(System.getProperties().getProperty("java.home"));

        File f = new File(java_home, "package.info");

        if (!f.exists()) {

            // Solo copiamos la JRE si es la de un plugin de gvSIG.

            return true;

        }

        handler.logOutput("Installing JRE plugin (This may take a while)...", false);

        try {

            File installation_folder = new File(args[0]);

            File target = getFile(installation_folder,"gvSIG", "extensiones","jre");

            doCopyDirectory(java_home,target,true);

            File java_bin = getFile(installation_folder,"gvSIG", "extensiones","jre","bin","java");

            java_bin.setExecutable(true, false);

        } catch (Exception ex) {

            handler.logOutput("Can't install JRE plugin. " + ex.toString(), false);

            return false;

        }

        handler.logOutput("JRE plugin installed.", false);

        return true;

    }

    public static final long ONE_KB = 1024;

    public static final long ONE_MB = ONE_KB * ONE_KB;

    private static final long FILE_COPY_BUFFER_SIZE = ONE_MB * 30;

    public static File getFile(final File directory, final String... names) {

        if (directory == null) {

            throw new NullPointerException("directory must not be null");

        }

        if (names == null) {

            throw new NullPointerException("names must not be null");

        }

        File file = directory;

        for (final String name : names) {

            file = new File(file, name);

        }

        return file;

    }

    private static void doCopyDirectory(final File srcDir, final File destDir,

            final boolean preserveFileDate)

            throws IOException {

        // recurse

        final File[] srcFiles = srcDir.listFiles();

        if (srcFiles == null) { // null if abstract pathname does not denote a directory, or if an I/O error occurs

            throw new IOException("Failed to list contents of " + srcDir);

        }

        if (destDir.exists()) {

            if (destDir.isDirectory() == false) {

                throw new IOException("Destination '" + destDir + "' exists but is not a directory");

            }

        } else {

            if (!destDir.mkdirs() && !destDir.isDirectory()) {

                throw new IOException("Destination '" + destDir + "' directory cannot be created");

            }

        }

        if (destDir.canWrite() == false) {

            throw new IOException("Destination '" + destDir + "' cannot be written to");

        }

        for (final File srcFile : srcFiles) {

            final File dstFile = new File(destDir, srcFile.getName());

            if (srcFile.isDirectory()) {

                doCopyDirectory(srcFile, dstFile, preserveFileDate);

            } else {

                doCopyFile(srcFile, dstFile, preserveFileDate);

            }

        }

        // Do this last, as the above has probably affected directory metadata

        if (preserveFileDate) {

            destDir.setLastModified(srcDir.lastModified());

        }

    }

    private static void doCopyFile(final File srcFile, final File destFile, final boolean preserveFileDate)

            throws IOException {

        if (destFile.exists() && destFile.isDirectory()) {

            throw new IOException("Destination '" + destFile + "' exists but is a directory");

        }

        FileInputStream fis = null;

        FileOutputStream fos = null;

        FileChannel input = null;

        FileChannel output = null;

        try {

            fis = new FileInputStream(srcFile);

            fos = new FileOutputStream(destFile);

            input = fis.getChannel();

            output = fos.getChannel();

            final long size = input.size(); // TODO See IO-386

            long pos = 0;

            long count = 0;

            while (pos < size) {

                final long remain = size - pos;

                count = remain > FILE_COPY_BUFFER_SIZE ? FILE_COPY_BUFFER_SIZE : remain;

                final long bytesCopied = output.transferFrom(input, pos, count);

                if (bytesCopied == 0) { // IO-385 - can happen if file is truncated after caching the size

                    break; // ensure we don't loop forever

                }

                pos += bytesCopied;

            }

        } finally {

            closeQuietly(output, fos, input, fis);

        }

        final long srcLen = srcFile.length(); // TODO See IO-386

        final long dstLen = destFile.length(); // TODO See IO-386

        if (srcLen != dstLen) {

            throw new IOException("Failed to copy full contents from '"

                    + srcFile + "' to '" + destFile + "' Expected length: " + srcLen + " Actual: " + dstLen);

        }

        if (preserveFileDate) {

            destFile.setLastModified(srcFile.lastModified());

        }

    }

    public static void closeQuietly(final Closeable closeable) {

        try {

            if (closeable != null) {

                closeable.close();

            }

        } catch (final IOException ioe) {

            // ignore

        }

    }

    public static void closeQuietly(final Closeable... closeables) {

        if (closeables == null) {

            return;

        }

        for (final Closeable closeable : closeables) {

            closeQuietly(closeable);

        }

    }

}