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 */ 017 package org.apache.logging.log4j.core.config.plugins; 018 019 import org.apache.logging.log4j.core.config.Property; 020 import org.apache.logging.log4j.core.lookup.Interpolator; 021 import org.apache.logging.log4j.core.lookup.MapLookup; 022 import org.apache.logging.log4j.core.lookup.StrLookup; 023 024 import java.util.HashMap; 025 import java.util.Map; 026 027 /** 028 * Handles properties defined in the configuration. 029 */ 030 @Plugin(name = "properties", type = "Core", printObject = true) 031 public final class PropertiesPlugin { 032 033 private PropertiesPlugin() { 034 } 035 036 /** 037 * Create the Properties component. 038 * @param properties An array of Property elements. 039 * @return An Interpolator that includes the configuration properties. 040 */ 041 @PluginFactory 042 public static StrLookup configureSubstitutor(@PluginElement("properties") Property[] properties) { 043 if (properties == null) { 044 return new Interpolator(null); 045 } 046 Map<String, String> map = new HashMap<String, String>(); 047 048 for (Property prop : properties) { 049 map.put(prop.getName(), prop.getValue()); 050 } 051 052 return new Interpolator(new MapLookup(map)); 053 } 054 }