Copyright (c) 2005 Contributors.
All rights reserved.
This program and the accompanying materials are made available
under the terms of the Eclipse Public License v1.0
which accompanies this distribution and is available at
http://eclipse.org/legal/epl-v10.html
Contributors:
  Alexandre Vasseur         initial implementation
/*******************************************************************************
 * Copyright (c) 2005 Contributors.
 * All rights reserved.
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution and is available at
 * http://eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Alexandre Vasseur         initial implementation
 *******************************************************************************/
package org.aspectj.weaver.loadtime;

import java.util.Collections;
import java.util.Iterator;
import java.util.List;

import org.aspectj.bridge.IMessage;
import org.aspectj.bridge.IMessageHandler;
import org.aspectj.bridge.Message;
import org.aspectj.util.LangUtil;

A class that hanldes LTW options. Note: AV - I choosed to not reuse AjCompilerOptions and alike since those implies too many
dependancies on jdt and ajdt modules.
Author:
Alexandre Vasseur/**
 * A class that hanldes LTW options. Note: AV - I choosed to not reuse AjCompilerOptions and alike since those implies too many
 * dependancies on jdt and ajdt modules.
 * 
 * @author <a href="mailto:alex AT gnilux DOT com">Alexandre Vasseur</a>
 */
public class Options {

	private final static String OPTION_15 = "-1.5";
	private final static String OPTION_lazyTjp = "-XlazyTjp";
	private final static String OPTION_noWarn = "-nowarn";
	private final static String OPTION_noWarnNone = "-warn:none";
	private final static String OPTION_proceedOnError = "-proceedOnError";
	private final static String OPTION_verbose = "-verbose";
	private final static String OPTION_debug = "-debug";
	private final static String OPTION_reweavable = "-Xreweavable";// notReweavable is default for LTW
	private final static String OPTION_noinline = "-Xnoinline";
	private final static String OPTION_addSerialVersionUID = "-XaddSerialVersionUID";
	private final static String OPTION_hasMember = "-XhasMember";
	private final static String OPTION_pinpoint = "-Xdev:pinpoint";
	private final static String OPTION_showWeaveInfo = "-showWeaveInfo";
	private final static String OPTIONVALUED_messageHandler = "-XmessageHandlerClass:";
	private static final String OPTIONVALUED_Xlintfile = "-Xlintfile:";
	private static final String OPTIONVALUED_Xlint = "-Xlint:";
	private static final String OPTIONVALUED_joinpoints = "-Xjoinpoints:";
	private static final String OPTIONVALUED_Xset = "-Xset:";
	private static final String OPTION_timers = "-timers";
	private static final String OPTIONVALUED_loadersToSkip = "-loadersToSkip:";

	public static WeaverOption parse(String options, ClassLoader laoder, IMessageHandler imh) {
		WeaverOption weaverOption = new WeaverOption(imh);

		if (LangUtil.isEmpty(options)) {
			return weaverOption;
		}
		// the first option wins
		List<String> flags = LangUtil.anySplit(options, " ");
		Collections.reverse(flags);

		// do a first round on the message handler since it will report the options themselves
		for (Iterator<String> iterator = flags.iterator(); iterator.hasNext();) {
			String arg = iterator.next();
			if (arg.startsWith(OPTIONVALUED_messageHandler)) {
				if (arg.length() > OPTIONVALUED_messageHandler.length()) {
					String handlerClass = arg.substring(OPTIONVALUED_messageHandler.length()).trim();
					try {
						Class handler = Class.forName(handlerClass, false, laoder);
						weaverOption.messageHandler = ((IMessageHandler) handler.newInstance());
					} catch (Throwable t) {
						weaverOption.messageHandler.handleMessage(new Message("Cannot instantiate message handler " + handlerClass,
								IMessage.ERROR, t, null));
					}
				}
			}
		}

		// configure the other options
		for (Iterator<String> iterator = flags.iterator(); iterator.hasNext();) {
			String arg = (String) iterator.next();
			if (arg.equals(OPTION_15)) {
				weaverOption.java5 = true;
			} else if (arg.equalsIgnoreCase(OPTION_lazyTjp)) {
				weaverOption.lazyTjp = true;
			} else if (arg.equalsIgnoreCase(OPTION_noinline)) {
				weaverOption.noInline = true;
			} else if (arg.equalsIgnoreCase(OPTION_addSerialVersionUID)) {
				weaverOption.addSerialVersionUID = true;
			} else if (arg.equalsIgnoreCase(OPTION_noWarn) || arg.equalsIgnoreCase(OPTION_noWarnNone)) {
				weaverOption.noWarn = true;
			} else if (arg.equalsIgnoreCase(OPTION_proceedOnError)) {
				weaverOption.proceedOnError = true;
			} else if (arg.equalsIgnoreCase(OPTION_reweavable)) {
				weaverOption.notReWeavable = false;
			} else if (arg.equalsIgnoreCase(OPTION_showWeaveInfo)) {
				weaverOption.showWeaveInfo = true;
			} else if (arg.equalsIgnoreCase(OPTION_hasMember)) {
				weaverOption.hasMember = true;
			} else if (arg.startsWith(OPTIONVALUED_joinpoints)) {
				if (arg.length() > OPTIONVALUED_joinpoints.length()) {
					weaverOption.optionalJoinpoints = arg.substring(OPTIONVALUED_joinpoints.length()).trim();
				}
			} else if (arg.equalsIgnoreCase(OPTION_verbose)) {
				weaverOption.verbose = true;
			} else if (arg.equalsIgnoreCase(OPTION_debug)) {
				weaverOption.debug = true;
			} else if (arg.equalsIgnoreCase(OPTION_pinpoint)) {
				weaverOption.pinpoint = true;
			} else if (arg.startsWith(OPTIONVALUED_messageHandler)) {
				// handled in first round
			} else if (arg.startsWith(OPTIONVALUED_Xlintfile)) {
				if (arg.length() > OPTIONVALUED_Xlintfile.length()) {
					weaverOption.lintFile = arg.substring(OPTIONVALUED_Xlintfile.length()).trim();
				}
			} else if (arg.startsWith(OPTIONVALUED_Xlint)) {
				if (arg.length() > OPTIONVALUED_Xlint.length()) {
					weaverOption.lint = arg.substring(OPTIONVALUED_Xlint.length()).trim();
				}
			} else if (arg.startsWith(OPTIONVALUED_Xset)) {
				if (arg.length() > OPTIONVALUED_Xlint.length()) {
					weaverOption.xSet = arg.substring(OPTIONVALUED_Xset.length()).trim();
				}
			} else if (arg.equalsIgnoreCase(OPTION_timers)) {
				weaverOption.timers = true;
			} else if (arg.startsWith(OPTIONVALUED_loadersToSkip)) {
				if (arg.length() > OPTIONVALUED_loadersToSkip.length()) {
					String value = arg.substring(OPTIONVALUED_loadersToSkip.length()).trim();
					weaverOption.loadersToSkip = value;
				}
			} else {
				weaverOption.messageHandler.handleMessage(new Message("Cannot configure weaver with option '" + arg
						+ "': unknown option", IMessage.WARNING, null, null));
			}
		}

		// refine message handler configuration
		if (weaverOption.noWarn) {
			weaverOption.messageHandler.ignore(IMessage.WARNING);
		}
		if (weaverOption.verbose) {
			weaverOption.messageHandler.dontIgnore(IMessage.INFO);
		}
		if (weaverOption.debug) {
			weaverOption.messageHandler.dontIgnore(IMessage.DEBUG);
		}
		if (weaverOption.showWeaveInfo) {
			weaverOption.messageHandler.dontIgnore(IMessage.WEAVEINFO);
		}

		return weaverOption;
	}

	public static class WeaverOption {
		boolean java5;
		boolean lazyTjp;
		boolean hasMember;
		boolean timers = false;
		String optionalJoinpoints;
		boolean noWarn;
		boolean proceedOnError;
		boolean verbose;
		boolean debug;
		boolean notReWeavable = true;// default to notReweavable for LTW (faster)
		boolean noInline;
		boolean addSerialVersionUID;
		boolean showWeaveInfo;
		boolean pinpoint;
		IMessageHandler messageHandler;
		String lint;
		String lintFile;
		String xSet;
		String loadersToSkip;

		public WeaverOption(IMessageHandler imh) {
			// messageHandler = new DefaultMessageHandler();//default
			this.messageHandler = imh;
		}
	}
}