Main.java

/**
 * Copyright (c) 2006-2011 Floggy Open Source Group. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.sourceforge.floggy.persistence;

import java.io.File;

import java.util.Arrays;
import java.util.List;

/**
 * DOCUMENT ME!
 *
 * @author <a href="mailto:thiago.moreira@floggy.org">Thiago Moreira</a>
 * @version $Revision$
  */
public class Main {
	/**
	 * Creates a new Main object.
	 */
	protected Main() {
	}

	/**
	* 
	DOCUMENT ME!
	*
	* @param args
	*/
	public static void main(String[] args) {
		List params = Arrays.asList(args);

		String[] classpath = initClasspath(params);
		File outputFile = initOutputFile(params);
		File inputFile = initInputFile(params);
		File configurationFile = initConfigurationFile(params);
		boolean generateSource = params.indexOf("-s") != -1;

		if (outputFile == null) {
			outputFile = inputFile;
		}

		Weaver weaver = new Weaver();

		try {
			if (configurationFile == null) {
				Configuration configuration = new Configuration();
				configuration.setGenerateSource(generateSource);
				configuration.setAddDefaultConstructor(true);
				weaver.setConfiguration(configuration);
			} else {
				weaver.setConfigurationFile(configurationFile);
			}

			weaver.setClasspath(classpath);
			weaver.setOutputFile(outputFile);
			weaver.setInputFile(inputFile);

			weaver.execute();
		} catch (WeaverException e) {
			e.printStackTrace();
			System.out.println(e.getMessage());
		}
	}

	/**
	* Get the classpath option.
	*
	* @param params DOCUMENT ME!
	*
	* @return DOCUMENT ME!
	*/
	private static String[] initClasspath(List params) {
		String[] classpath = null;

		int index = params.indexOf("-cp");

		if (index != -1) {
			try {
				String value = params.get(index + 1).toString();
				classpath = value.split(File.pathSeparator);

				params.remove("-cp");
				params.remove(value);
			} catch (ArrayIndexOutOfBoundsException e) {
				System.out.println("-cp requires class path specification");
				usage();
			}
		}

		return classpath;
	}

	/**
	* Get the configuration file.
	*
	* @param params
	*
	* @return
	*/
	private static File initConfigurationFile(List params) {
		File outputFile = null;

		int index = params.indexOf("-c");

		if (index != -1) {
			String value = params.get(index + 1).toString();

			outputFile = new File(value.trim());

			params.remove(index);
			params.remove(value);
		}

		return outputFile;
	}

	/**
	* Get the input file option.
	*
	* @param params DOCUMENT ME!
	*
	* @return DOCUMENT ME!
	*/
	private static File initInputFile(List params) {
		File inputFile = null;

		if (params.size() == 1) {
			String value = params.get(0).toString();

			inputFile = new File(value.trim());

			if (inputFile.exists()) {
				params.remove(0);
			} else {
				System.out.println("File \"" + value + "\" does not exists.");
				usage();
			}
		} else {
			System.out.println("Invalid number of parameters.");
			usage();
		}

		return inputFile;
	}

	/**
	* Get the output file.
	*
	* @param params
	*
	* @return
	*/
	private static File initOutputFile(List params) {
		File outputFile = null;

		int index = params.indexOf("-o");

		if (index != -1) {
			String value = params.get(index + 1).toString();

			outputFile = new File(value.trim());

			params.remove(index);
			params.remove(value);
		}

		return outputFile;
	}

	/**
	* Prints usage message.
	*/
	private static final void usage() {
		System.out.println("Usage:");
		System.out.println("java " + Main.class.getName()
			+ " [-options] jarfile | zipfile | directory");
		System.out.println();
		System.out.println("Where options are:");
		System.out.println(
			"-cp\t<Class search path of directories and zip/jar files separeted by "
			+ File.pathSeparatorChar + ">");
		System.out.println(
			"-o\t<Output file or directory where files will be stored>");

		System.out.println(
			"-s\t if provided the code generated will be saved in a file");

		System.out.println("-c\t the configuration file");

		System.exit(1);
	}
}