| /* |
| * Copyright (c) 2009, 2018 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0, which is available at |
| * http://www.eclipse.org/legal/epl-2.0. |
| * |
| * This Source Code may also be made available under the following Secondary |
| * Licenses when the conditions for such availability set forth in the |
| * Eclipse Public License v. 2.0 are satisfied: GNU General Public License, |
| * version 2 with the GNU Classpath Exception, which is available at |
| * https://www.gnu.org/software/classpath/license.html. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 |
| */ |
| |
| package com.sun.enterprise.universal; |
| |
| import java.util.*; |
| |
| /** |
| * |
| * @author Byron Nevins |
| */ |
| |
| public class PropertiesDecoder { |
| /** |
| * There are several CLI commands that take properties arguments. The properties |
| * are "flattened". This class will unflatten them back into a Map for you. |
| * <p>Example Input: <b>foo=goo:xyz:hoo=ioo</b> |
| * <p>Output would be 3 pairs: |
| * <ul> |
| * <li>foo, goo |
| * <li>xyz, null |
| * <li>hoo, ioo |
| * </ul> |
| * @param props The flattened string properties |
| * @return A Map of the String keys and values. It will return an |
| */ |
| |
| public static Map<String,String> unflatten(final String s) { |
| if(!ok(s)) |
| return Collections.emptyMap(); |
| |
| Map<String,String> map = new HashMap<String,String>(); |
| String[] elements = s.split(":"); |
| |
| for(String element : elements) { |
| addPair(map, element); |
| } |
| |
| return map; |
| } |
| |
| private static void addPair(Map<String, String> map, String element) { |
| // TODO this method is a perfect candidate for unit tests... |
| // note: It is quite tricky and delicate finding every possible weirdness |
| // that a user is capable of! |
| |
| // element is one of these: |
| // 0. "" |
| // 1. "foo" |
| // 2. "foo=goo" |
| // 3. "foo=" |
| // if we get garbage like a=b=c=d we change to "a", "b=c=d" |
| |
| // 0. |
| if(!ok(element)) |
| return; // no harm, no foul |
| |
| int index = element.indexOf("="); |
| |
| // 1. |
| if(index < 0) |
| map.put(element, null); |
| |
| // 3. |
| else if(element.length() - 1 <= index ) { |
| // lose the '=' |
| map.put(element.substring(0, index), null); |
| } |
| // 2 |
| else // guarantee: at least one char after the '=' |
| map.put(element.substring(0, index), element.substring(index + 1)); |
| } |
| |
| |
| private static boolean ok(String s) { |
| return s != null && s.length() > 0; |
| } |
| } |