/*
 * 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;

import org.apache.tools.ant.*;

import java.io.*;
import java.util.*;

/**
 * Copies a directory.
 *
 * @author James Davidson <a href="mailto:duncan@x180.com">duncan@x180.com</a>
 */

public class Copydir extends MatchingTask {

    private File srcDir;
    private File destDir;
    private boolean filtering = false;
    private Hashtable filecopyList = new Hashtable();

    public void setSrc(String src) {
        srcDir = project.resolveFile(src);
    }

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

    public void setFiltering(String filter) {
        filtering = Project.toBoolean(filter);
    }

    public void execute() throws BuildException {
        if (srcDir == null) {
            throw new BuildException("srcdir attribute must be set!");
        }

        if (!srcDir.exists()) {
            throw new BuildException("srcdir does not exist!");
        }

        DirectoryScanner ds = super.getDirectoryScanner(srcDir);

        String[] files = ds.getIncludedFiles();
        scanDir(srcDir, destDir, files);
        if (filecopyList.size() > 0) {
            project.log("Copying " + filecopyList.size() + " files to "
                        + destDir.getAbsolutePath());
            Enumeration enum = filecopyList.keys();
            while (enum.hasMoreElements()) {
                String fromFile = (String) enum.nextElement();
                String toFile = (String) filecopyList.get(fromFile);
                try {
                    project.copyFile(fromFile, toFile, filtering);
                } catch (IOException ioe) {
                    String msg = "Failed to copy " + fromFile + " to " + toFile
                        + " due to " + ioe.getMessage();
                    throw new BuildException(msg);
                }
            }
        }
    }

    private void scanDir(File from, File to, String[] files) {
        for (int i = 0; i < files.length; i++) {
            String filename = files[i];
            File srcFile = new File(from, filename);
            File destFile = new File(to, filename);
            if (srcFile.lastModified() > destFile.lastModified()) {
                filecopyList.put(srcFile.getAbsolutePath(),
                    destFile.getAbsolutePath());
            }
        }
    }
}
