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'databene commons' is an open source Java library by Volker Bergmann.
It provides extensions to the Java core library by utility classes, abstract concepts
and concrete implementations.
/*
* Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.databene.commons;
import java.util.concurrent.Callable;
/**
* Provides system related utility methods.
* Created: 21.10.2009 19:26:24
* @since 0.5.0
* @author Volker Bergmann
*/
public class SysUtil {
private SysUtil() { }
public static void runWithSystemProperty(String name, String value, Runnable runner) {
String oldValue = System.getProperty(name);
try {
System.setProperty(name, value);
runner.run();
} finally {
System.setProperty(name, (oldValue != null ? oldValue : ""));
}
}
public static T callWithSystemProperty(String name, String value, Callable callee) throws Exception {
String oldValue = System.getProperty(name);
try {
System.setProperty(name, value);
return callee.call();
} finally {
System.setProperty(name, oldValue);
}
}
}