ExecutionArguments.java

/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 * 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://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.rubypeople.rdt.launching;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.debug.core.DebugPlugin;

/**
 * The execution arguments for running a Java VM. The execution arguments are
 * separated into two parts: arguments to the VM itself, and arguments to the
 * Java main program. This class provides convenience methods for parsing a
 * string of arguments into separate components.
 * <p>
 * Clients may instantiate this class; it is not intended to be subclassed.
 * </p>
 */
public class ExecutionArguments {
	private String fVMArgs;
	private String fProgramArgs;

	/**
	 * Creates a new execution arguments object.
	 * 
	 * @param vmArgs
	 *            command line argument string passed to the VM
	 * @param programArgs
	 *            command line argument string passed to the program
	 */
	public ExecutionArguments(String vmArgs, String programArgs) {
		if (vmArgs == null || programArgs == null)
			throw new IllegalArgumentException();
		fVMArgs = vmArgs;
		fProgramArgs = programArgs;
	}

	/**
	 * Returns the VM arguments as one string.
	 * 
	 * @return the VM arguments as one string
	 */
	public String getVMArguments() {
		return fVMArgs;
	}

	/**
	 * Returns the program arguments as one string.
	 * 
	 * @return the program arguments as one string
	 */
	public String getProgramArguments() {
		return fProgramArgs;
	}

	/**
	 * Returns the VM arguments as an array of individual arguments.
	 * 
	 * @return the VM arguments as an array of individual arguments
	 */
	public String[] getVMArgumentsArray() {
		String[] raw = DebugPlugin.parseArguments(fVMArgs);
		List<String> modified = new ArrayList<String>();
		for (int i = 0; i < raw.length; i++) {
			String arg = raw[i];
			if ((arg.equals("-e") || arg.equals("-X") || arg.equals("-F"))
					&& (raw.length > (i + 1))) {
				modified.add(arg + " " + raw[i + 1]);
				i++;
			} else {
				modified.add(arg);
			}
		}
		return modified.toArray(new String[modified.size()]);
	}

	/**
	 * Returns the program arguments as an array of individual arguments.
	 * 
	 * @return the program arguments as an array of individual arguments
	 */
	public String[] getProgramArgumentsArray() {
		return DebugPlugin.parseArguments(fProgramArgs);
	}

}