/*
 * 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.DirectoryScanner;
import org.apache.tools.ant.taskdefs.MatchingTask;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.Vector;

public class Translate extends MatchingTask {

    private boolean ignoreDate = true;
    private Vector translaters = new Vector();
    private File srcDir = null;
    private File destDir = null;

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

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


    public TranslatorFactory createConvertCRLF() {
        return addTranslator(new ConvertCRLFFactory());
    }

    public TranslatorFactory createStrip() {
        return addTranslator(new StripFactory());
    }

    public void execute() throws BuildException {
        if (srcDir == null) {
            throw new BuildException("src attribute must be set!");
        }
        if (!srcDir.exists()) {
            throw new BuildException("src does not exist!");
        }
        if (destDir == null) {
            throw new BuildException("dest attribute must be set!");
        }
        if (!destDir.exists()) {
            throw new BuildException("dest does not exist!");
        }

        DirectoryScanner ds = super.getDirectoryScanner(srcDir);

        String[] files = ds.getIncludedFiles();
        for (int i = 0; i < files.length; i++) {
            String filename = files[i];
            File srcFile = new File(srcDir, filename);
            File destFile = new File(destDir, filename);
            if (ignoreDate || srcFile.lastModified() > destFile.lastModified()) {
                translate(srcFile, destFile);
            }
        }
    }


    protected void translate(File in, File out) throws BuildException {
        try {
            final InputStream is = new FileInputStream(in);
            OutputStream os = null;
            try {
                os = new FileOutputStream(out);
                final Enumeration list = translaters.elements();
                while (list.hasMoreElements()) {
                    final TranslatorFactory factory;
                    factory = (TranslatorFactory)list.nextElement();
                    os = factory.createTranslator(os);
                }
                int b;
                while ((b = is.read()) != -1) {
                    os.write(b);
                }
            } finally {
                if (os != null) {
                    os.close();
                }
            }
        } catch(IOException e) {
            throw new BuildException("Translating " + in + " to " + out
                    + " failed: " + e);
        }
    }

    protected TranslatorFactory addTranslator(TranslatorFactory translator) {
        translaters.insertElementAt(translator, 0);
        return translator;
    }

}