001/** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.camel.component.properties; 018 019import org.apache.camel.util.ObjectHelper; 020 021/** 022 * A {@link PropertiesFunction} that lookup the property value from 023 * JVM system property. 024 */ 025public class SysPropertiesFunction implements PropertiesFunction { 026 027 @Override 028 public String getName() { 029 return "sys"; 030 } 031 032 @Override 033 public String apply(String remainder) { 034 String key = remainder; 035 String defaultValue = null; 036 037 if (remainder.contains(":")) { 038 key = ObjectHelper.before(remainder, ":"); 039 defaultValue = ObjectHelper.after(remainder, ":"); 040 } 041 042 String value = System.getProperty(key); 043 return value != null ? value : defaultValue; 044 } 045 046}