/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000,2002 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 "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.ejb;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.DirectoryScanner;
import org.apache.tools.ant.taskdefs.MatchingTask;
import org.apache.tools.ant.taskdefs.Java;
import org.apache.tools.ant.types.Commandline;
import org.apache.tools.ant.types.Path;

import java.io.File;

/**
 * Builds a serialized 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 Conor MacNeill, 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 {
        if (descriptorDirectory == null ||
            !descriptorDirectory.isDirectory()) {
            throw new BuildException("descriptors directory " + descriptorDirectory.getPath() + 
                                     " is not valid");
        }
        if (generatedFilesDirectory == null ||
            !generatedFilesDirectory.isDirectory()) {
            throw new BuildException("dest directory " + generatedFilesDirectory.getPath() + 
                                     " is not valid");
        }
                                    
        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 = (Java) project.createTask("java");
        ddCreatorTask.setTaskName(getTaskName());
        ddCreatorTask.setFork(true);
        ddCreatorTask.setClassname("org.apache.tools.ant.taskdefs.optional.ejb.DDCreatorHelper");
        Commandline.Argument arguments = ddCreatorTask.createArg();
        arguments.setLine(args);
        ddCreatorTask.setClasspath(new Path(project, execClassPath));                         
        if (ddCreatorTask.executeJava() != 0) {                         
            throw new BuildException("Execution of ddcreator helper failed");
        }
    }

    /**
     * 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 serialized 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);
    }
}
