/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights 
 * reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
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 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
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 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
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 *    distribution.
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 * 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.
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package org.apache.tools.ant.taskdefs.optional;

import org.apache.tools.ant.*;
import org.apache.tools.ant.taskdefs.*;

import java.io.File;

/**
 * Build a serialised deployment descriptor given a text file description of the 
 * descriptor in the format supported by WebLogic.
 *
 * This ant task is a front end for the weblogic DDCreator tool.
 *
 * @author <a href="mailto:conor@cortexebusiness.com.au">Conor MacNeill</a>, Cortex ebusiness Pty Limited
 */
public class DDCreator extends MatchingTask {
    /**
     * The root directory of the tree containing the textual deployment desciptors. The actual
     * deployment descriptor files are selected using include and exclude constructs
     * on the EJBC task, as supported by the MatchingTask superclass.
     */
    private File descriptorDirectory;
    
    /**
     * The directory where generated serialised deployment descriptors are placed.
     */
    private File generatedFilesDirectory;
        
    /**
     * The classpath to be used in the weblogic ejbc calls. It must contain the weblogic
     * classes necessary fro DDCreator <b>and</b> the implementation classes of the 
     * home and remote interfaces.
     */
    private String classpath;
    
    /**
     * Do the work.
     *
     * The work is actually done by creating a helper task. This approach allows
     * the classpath of the helper task to be set. Since the weblogic tools require
     * the class files of the project's home and remote interfaces to be available in
     * the classpath, this also avoids having to start ant with the class path of the
     * project it is building.
     *
     * @exception BuildException if someting goes wrong with the build
     */
    public void execute() throws BuildException {
        try {
            validateDirectory(descriptorDirectory, "descriptor");
            validateDirectory(generatedFilesDirectory, "destination");
            
            String args = descriptorDirectory + " " + generatedFilesDirectory;
            
            // get all the files in the descriptor directory
            DirectoryScanner ds = super.getDirectoryScanner(descriptorDirectory);
    
            String[] files = ds.getIncludedFiles();

            for (int i = 0; i < files.length; ++i) {
                args += " " + files[i];
            }
            
            String systemClassPath = System.getProperty("java.class.path");
            String execClassPath = project.translatePath(systemClassPath + ":" + classpath);
            Java ddCreatorTask = new Java();
            ddCreatorTask.setProject(project);
            ddCreatorTask.setFork("yes");
            ddCreatorTask.setClassname("org.apache.tools.ant.taskdefs.optional.DDCreatorHelper");
            ddCreatorTask.setArgs(args);
            ddCreatorTask.setClasspath(execClassPath);                         
            ddCreatorTask.execute();
        }
        catch (Exception e) {
            e.printStackTrace();
            throw new BuildException("Exception in DDCreator: " + e.getMessage());
        }
    }

    /**
     * Set the directory from where the text descriptions of the deployment descriptors are
     * to be read.
     *
     * @param dirName the name of the directory containing the text deployment descriptor files.
     */
    public void setDescriptors(String dirName) {
        descriptorDirectory = new File(dirName);
    }
    
    /**
     * Set the directory into which the serialised deployment descriptors are to 
     * be written.
     *
     * @param dirName the name of the directory into which the serialised deployment
     *                descriptors are written.
     */
    public void setDest(String dirName) {
        generatedFilesDirectory = new File(dirName);
    }

    /**
     * Set the classpath to be used for this compilation.
     *
     * @param s the classpath to use for the ddcreator tool.
     */
    public void setClasspath(String s) {
        this.classpath = project.translatePath(s);
    }
}