/*
 * 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", "Ant", 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;

import org.apache.tools.ant.*;
import java.io.*;
import java.util.zip.*;
/**
 * Unzip a file. 
 *
 * @author costin@dnt.ro
 * @author <a href="mailto:stefan.bodewig@epost.de">Stefan Bodewig</a>
 */
public class Expand extends MatchingTask {
    private File dest; // req
    private File source; // req

    private boolean overwrite = true;
    
    /**
     * Do the work.
     *
     * @exception BuildException Thrown in unrecoverable error.
     */
    // XXX move it to util or tools
    public void execute() throws BuildException {
        if ("expand".equals(taskType)) {
            log("!! expand is deprecated. Use unzip instead. !!");
        }
        

        Touch touch = (Touch) project.createTask("touch");
        touch.setOwningTarget(target);
        touch.setTaskName(getTaskName());
        touch.setLocation(getLocation());
        
        if (source == null) {
            throw new BuildException("Source attribute must be specified");
        }
        if (dest == null) {
            throw new BuildException("Dest attribute must be specified");
        }

        if (source.isDirectory()) {
            // get all the files in the descriptor directory
            DirectoryScanner ds = super.getDirectoryScanner(source);
    
            String[] files = ds.getIncludedFiles();
            for (int i = 0; i < files.length; ++i) {
                File file = new File(source, files[i]);
                expandFile(touch, file, dest);
            }
        }
        else {
            expandFile(touch, source, dest);
        }
    }

    private void expandFile(Touch touch, File srcF, File dir) {
        ZipInputStream zis = null;
        try {
            log("Expanding: " + srcF + " into " + dir, Project.MSG_INFO);
            // code from WarExpand
            zis = new ZipInputStream(new FileInputStream(srcF));
            ZipEntry ze = null;

            while ((ze = zis.getNextEntry()) != null) {
                File f = new File(dir, project.translatePath(ze.getName()));
                try {
                    if (!overwrite && f.exists() 
                        && f.lastModified() >= ze.getTime()) {
                        log("Skipping " + f + " as it is up-to-date",
                            Project.MSG_DEBUG);
                        continue;
                    }
                    
                    log("expanding " + ze.getName() + " to "+ f, 
                        Project.MSG_VERBOSE);
                    // create intermediary directories - sometimes zip don't add them
                    File dirF=new File(f.getParent());
                    dirF.mkdirs();
                    
                    if (ze.isDirectory()) {
                        f.mkdirs(); 
                    } else {
                        byte[] buffer = new byte[1024];
                        int length = 0;
                        FileOutputStream fos = new FileOutputStream(f);
                        
                        while ((length = zis.read(buffer)) >= 0) {
                            fos.write(buffer, 0, length);
                        }
                        
                        fos.close();
                    }
                    
                    if (project.getJavaVersion() != Project.JAVA_1_1) {
                        touch.setFile(f);
                        touch.setMillis(ze.getTime());
                        touch.touch();
                    }
                    
                } catch( FileNotFoundException ex ) {
                    log("Unable to expand to file " + f.getPath(), Project.MSG_WARN);
                }
            }
            log("expand complete", Project.MSG_VERBOSE );
        } catch (IOException ioe) {
            throw new BuildException("Error while expanding " + srcF.getPath(), ioe);
        } finally {
            if (zis != null) {
                try {
                    zis.close();
                }
                catch (IOException e) {}
            }
        }
    }
    
    /**
     * Set the destination directory. File will be unzipped into the
     * destination directory.
     *
     * @param d Path to the directory.
     */
    public void setDest(File d) {
        this.dest=d;
    }

    /**
     * Set the path to zip-file.
     *
     * @param s Path to zip-file.
     */
    public void setSrc(File s) {
        this.source = s;
    }

    /**
     * Should we overwrite files in dest, even if they are newer than
     * the corresponding entries in the archive?
     */
    public void setOverwrite(boolean b) {
        overwrite = b;
    }

}