| /******************************************************************************* |
| * Copyright (c) 2004, 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.eclipse.wtp.releng.wtpbuilder; |
| |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.List; |
| import java.util.ArrayList; |
| |
| /** |
| * This is a helper class used to parse command line arguments from java main executables |
| * into specific values. |
| */ |
| public class CommandOptionParser { |
| |
| /** |
| * The delimiter token used to specify a new command line argument |
| */ |
| private static final String delimiter = "-"; //$NON-NLS-1$ |
| |
| /** |
| * A cached Map of the command line options |
| */ |
| private Map options; |
| |
| /** |
| * Constructor takes the comman line arguments as a string array. Invokes parse on the options to initialize |
| * the cached map of options. |
| * @param args |
| */ |
| public CommandOptionParser(String[] args) { |
| parse(args); |
| } |
| |
| /** |
| * Get the command line argument value for the given key as a collection |
| * @param key |
| * @return Collection |
| */ |
| private Collection getOption(String key) { |
| return (Collection) options.get(key); |
| } |
| |
| /** |
| * Return the command line argument value for the given argument key as a string |
| * @param key |
| * @return String value |
| */ |
| public String getOptionAsString(String key) { |
| Collection c = getOption(key); |
| if (c == null || c.isEmpty()) |
| return null; |
| return (String) c.iterator().next(); |
| } |
| |
| /** |
| * Private helper method to parse the command line arguments into a cached map of options and |
| * option values. |
| * @param args |
| */ |
| private void parse(String[] args) { |
| options = new HashMap(); |
| String option = null; |
| for (int i = 0; i < args.length; i++) { |
| if (args[i] != null) { |
| if (args[i].startsWith(delimiter)) { |
| option = args[i].substring(1); |
| options.put(option, new ArrayList(1)); |
| } else if (option != null) { |
| ((List) options.get(option)).add(args[i]); |
| } |
| } |
| } |
| } |
| } |