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This module contains utilities used purely in tests.

There is a newer version: 272

/**
 * The MIT License
 * Copyright © 2010 JmxTrans team
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.googlecode.jmxtrans.test;

import java.io.Closeable;

public class ResetableSystemProperty implements Closeable {

	private final String key;
	private final String oldValue;

	private ResetableSystemProperty(String key, String newValue, String oldValue) {
		this.key = key;
		this.oldValue = oldValue;
		System.setProperty(key, newValue);
	}

	@Override
	public void close() {
		if (oldValue != null) {
			System.setProperty(key, oldValue);
		} else {
			System.clearProperty(key);
		}
	}

	public static ResetableSystemProperty setSystemProperty(String key, String value) {
		return new ResetableSystemProperty(key, value, System.getProperty(key));
	}
}