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

import java.io.File;

/**
 * Build EJB support classes using Weblogic's ejbc tool from a directory containing
 * a set of deployment descriptors.
 
 *
 * @author <a href="mailto:conor@cortexebusiness.com.au">Conor MacNeill</a>, Cortex ebusiness Pty Limited
 */
public class ejbc extends MatchingTask {
    /**
     * The root directory of the tree containing the serialised deployment desciptors. The actual
     * deployment descriptor files are selected using include and exclude constructs
     * on the ejbc task provided by the MatchingTask superclass.
     */
    private File descriptorDirectory;
    
    /**
     * The directory where generated files are placed.
     */
    private File generatedFilesDirectory;
    
    /**
     * The name of the manifest file generated for the EJB jar.
     */
    private File generatedManifestFile;
    
    /**
     * The classpath to be used in the weblogic ejbc calls. It must contain the weblogic
     * classes <b>and</b> the implementation classes of the home and remote interfaces.
     */
    private String classpath;
    
    /**
     * The source directory for the home and remote interfaces. This is used to determine if
     * the generated deployment classes are out of date.
     */
    private File sourceDirectory;
    
    /**
     * Do the work.
     *
     * The work is actually done by creating a separate JVM to run 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, "generated descriptors");
            validateDirectory(sourceDirectory, "source");
            
            String systemClassPath = System.getProperty("java.class.path");
            String execClassPath = project.translatePath(systemClassPath + ":" + classpath +
                                                         ":" + generatedFilesDirectory);
            
            // get all the files in the descriptor directory
            DirectoryScanner ds = super.getDirectoryScanner(descriptorDirectory);
    
            String[] files = ds.getIncludedFiles();

            Java helperTask = new Java();
            helperTask.setProject(project);
            helperTask.setFork("yes");
            helperTask.setClassname("org.apache.tools.ant.taskdefs.optional.ejbcHelper");
            String args = "";
            args += " " + descriptorDirectory;
            args += " " + generatedFilesDirectory;
            args += " " + sourceDirectory;
            args += " " + generatedManifestFile;
            for (int i = 0; i < files.length; ++i) {
                args += " " + files[i];
            }
                                      
            helperTask.setArgs(args);
            helperTask.setClasspath(execClassPath);                         
            helperTask.execute();
        }
        catch (Exception e) {
            e.printStackTrace();
            throw new BuildException("Exception in ejbc: " + e.getMessage());
        }
    }

    /**
     * Set the directory from where the serialised deployment descriptors are
     * to be read.
     *
     * @param dirName the name of the directory containing the serialised deployment descriptors.
     */
    public void setDescriptors(String dirName) {
        descriptorDirectory = new File(dirName);
    }
    
    /**
     * Set the directory into which the support classes, RMI stubs, etc are to be written
     *
     * @param dirName the name of the directory into which code is generated
     */
    public void setDest(String dirName) {
        generatedFilesDirectory = new File(dirName);
    }

    /**
     * Set the generated manifest file. 
     *
     * For each EJB that is processed an entry is created in this file. This can then be used
     * to create a jar file for dploying the beans.
     *
     * @param manfestFilename the name of the manifest file to be generated.
     */
    public void setManifest(String manifestFilename) {
        generatedManifestFile = new File(manifestFilename);
    }
    
    /**
     * Set the classpath to be used for this compilation.
     */
    public void setClasspath(String s) {
        this.classpath = project.translatePath(s);
    }

    /**
     * Set the directory containing the source code for the home interface, remote interface
     * and public key class definitions.
     *
     * @param dirName the directory containg the source tree for the EJB's interface classes.
     */
    public void setSrc(String dirName) {
        sourceDirectory = new File(dirName);
    }
                
}