/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */


package org.apache.tools.ant.taskdefs.optional;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Task;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipEntry;

public class Unzip extends Task {

    private File file = null;
    private File destDir = new File(".");

    public void setFile(String value) {
        file = project.resolveFile(value);
    }

    public void setDest(String value) {
        destDir = project.resolveFile(value);
    }

    public void execute() throws BuildException {
        if (file == null) {
            throw new BuildException("file attribute must be set!");
        }
        if (!file.exists()) {
            throw new BuildException("file does not exist: " + file);
        }

        project.log("Unzip \"" + file + "\" to \"" + destDir + "\"");

        FileOutputStream os = null;
        try {
            final ZipInputStream zis = new ZipInputStream(new FileInputStream(file));
            ZipEntry entry;
            while ((entry = zis.getNextEntry()) != null) {
                final File destination = new File(destDir, entry.getName());
                if (entry.isDirectory()) {
                    if (!destination.exists()) {
                        if (!destination.mkdirs()) {
                            throw new BuildException("Unzip " + file
                                    + " failed creating directory "
                                    + destination + ".");
                        }
                    }
                    continue;
                }
                try {
                    destination.getParentFile().mkdirs();
                    os = new FileOutputStream(destination);
                    int b;
                    while ((b = zis.read()) != -1) {
                        os.write(b);
                    }
                } finally {
                    if (os != null) {
                        os.close();
                        os = null;
                    }
                }
            }
        } catch (IOException e) {
            throw new BuildException("Unzip " + file + " failed: " + e);
        }
    }
}