1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache license, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the license for the specific language governing permissions and 15 * limitations under the license. 16 */ 17 package org.apache.logging.log4j.core.config.plugins; 18 19 import org.apache.logging.log4j.core.config.Property; 20 import org.apache.logging.log4j.core.lookup.Interpolator; 21 import org.apache.logging.log4j.core.lookup.MapLookup; 22 import org.apache.logging.log4j.core.lookup.StrLookup; 23 24 import java.util.HashMap; 25 import java.util.Map; 26 27 /** 28 * Handles properties defined in the configuration. 29 */ 30 @Plugin(name = "properties", type = "Core", printObject = true) 31 public final class PropertiesPlugin { 32 33 private PropertiesPlugin() { 34 } 35 36 /** 37 * Create the Properties component. 38 * @param properties An array of Property elements. 39 * @return An Interpolator that includes the configuration properties. 40 */ 41 @PluginFactory 42 public static StrLookup configureSubstitutor(@PluginElement("properties") Property[] properties) { 43 if (properties == null) { 44 return new Interpolator(null); 45 } 46 Map<String, String> map = new HashMap<String, String>(); 47 48 for (Property prop : properties) { 49 map.put(prop.getName(), prop.getValue()); 50 } 51 52 return new Interpolator(new MapLookup(map)); 53 } 54 }