/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000 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.optional.jlink;

import org.apache.tools.ant .*;
import org.apache.tools.ant.taskdefs.MatchingTask;
import org.apache.tools.ant.types .*;
import java.io.File;

/**
 * This class defines objects that can link together various jar and
 * zip files. 
 *
 * <p>It is basically a wrapper for the jlink code written originally
 * by <a href="mailto:beard@netscape.com">Patrick Beard</a>.  The
 * classes org.apache.tools.ant.taskdefs.optional.jlink.Jlink and
 * org.apache.tools.ant.taskdefs.optional.jlink.ClassNameReader
 * support this class.</p>
 *
 * <p>For example:
 * <code>
 * <pre>
 * &lt;jlink compress=&quot;false&quot; outfile=&quot;out.jar&quot;/&gt;
 *   &lt;mergefiles&gt;
 *     &lt;pathelement path=&quot;${build.dir}/mergefoo.jar&quot;/&gt;
 *     &lt;pathelement path=&quot;${build.dir}/mergebar.jar&quot;/&gt;
 *   &lt;/mergefiles&gt;
 *   &lt;addfiles&gt;
 *     &lt;pathelement path=&quot;${build.dir}/mac.jar&quot;/&gt;
 *     &lt;pathelement path=&quot;${build.dir}/pc.zip&quot;/&gt;
 *   &lt;/addfiles&gt;
 * &lt;/jlink&gt;
 * </pre>
 * </code>
 *
 * @author <a href="mailto:matthew.k.heun@gaerospace.com">Matthew Kuperus Heun</a> */
public class JlinkTask extends MatchingTask {

    /**
     * The output file for this run of jlink. Usually a jar or zip file.
     */
    public  void setOutfile( File outfile ) {
        this.outfile = outfile;
    }

    /**
     * Establishes the object that contains the files to
     * be merged into the output.
     */
    public  Path createMergefiles() {
        if ( this .mergefiles == null ) {
            this .mergefiles = new Path(getProject());
        }
        return this .mergefiles.createPath();
    }

    /**
     * Sets the files to be merged into the output.
     */
    public  void setMergefiles( Path mergefiles ) {
        if ( this .mergefiles == null ) {
            this .mergefiles = mergefiles;
        }
        else {
            this .mergefiles .append( mergefiles );
        }
    }

    /**
     * Establishes the object that contains the files to
     * be added to the output.
     */
    public  Path createAddfiles() {
        if ( this .addfiles == null ) {
            this .addfiles = new Path(getProject());
        }
        return this .addfiles .createPath();
    }

    /**
     * Sets the files to be added into the output.
     */
    public  void setAddfiles( Path addfiles ) {
        if ( this .addfiles == null ) {
            this .addfiles = addfiles;
        }
        else {
            this .addfiles .append( addfiles );
        }
    }

    /**
     * Defines whether or not the output should be compacted.
     */
    public  void setCompress( boolean compress ) {
        this .compress = compress;
    }

    /**
     * Does the adding and merging.
     */
    public  void execute() throws BuildException {
        //Be sure everything has been set.
        if ( outfile == null ) {
            throw new BuildException( "outfile attribute is required! Please set." );
        }
        if (!haveAddFiles() && !haveMergeFiles()) {
            throw new BuildException( "addfiles or mergefiles required! Please set." );
        }
        log( "linking:     " + outfile.getPath() );
        log( "compression: " + compress, Project.MSG_VERBOSE );
        jlink linker = new jlink();
        linker .setOutfile( outfile.getPath() );
        linker .setCompression( compress );
        if (haveMergeFiles()){
            log( "merge files: " + mergefiles .toString(), Project .MSG_VERBOSE );
            linker .addMergeFiles( mergefiles .list() );
        }
        if (haveAddFiles()){
            log( "add files: " + addfiles .toString(), Project .MSG_VERBOSE );
            linker .addAddFiles( addfiles .list() );
        }
        try  {
            linker .link();
        } catch( Exception ex ) {
            throw new BuildException( ex, location );
        }
    }

    private boolean haveAddFiles(){
        return haveEntries(addfiles);
    }

    private boolean haveMergeFiles(){
        return haveEntries(mergefiles);
    }

    private boolean haveEntries(Path p){
        if (p == null){
            return false;
        }
        if (p.size() > 0){
            return true;
        }
        return false;
    }

    private  File outfile = null;

    private  Path mergefiles = null;

    private  Path addfiles = null;

    private  boolean compress = false;

    private  String ps = System .getProperty( "path.separator" );

}