001// Copyright 2004, 2005 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.hivemind.impl; 016 017import org.apache.hivemind.SymbolSource; 018 019/** 020 * Implementation of {@link org.apache.hivemind.SymbolSource} that 021 * accesses {@link java.lang.System#getProperty(java.lang.String)}. 022 * 023 * @author Howard Lewis Ship 024 */ 025public class SystemPropertiesSymbolSource implements SymbolSource 026{ 027 028 /** 029 * Returns the value for the named system property, or null 030 * if no such system property exists. 031 */ 032 public String valueForSymbol(String name) 033 { 034 return System.getProperty(name); 035 } 036 037}