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.logging.log4j.core.lookup; 018 019import java.util.Map; 020import java.util.Properties; 021 022/** 023 * {@link RuntimeStrSubstitutor} is a {@link StrSubstitutor} which only supports recursive evaluation of lookups. 024 * This can be dangerous when combined with user-provided inputs, and should only be used on data directly from 025 * a configuration. 026 */ 027public final class ConfigurationStrSubstitutor extends StrSubstitutor { 028 029 public ConfigurationStrSubstitutor() { 030 } 031 032 public ConfigurationStrSubstitutor(final Map<String, String> valueMap) { 033 super(valueMap); 034 } 035 036 public ConfigurationStrSubstitutor(final Properties properties) { 037 super(properties); 038 } 039 040 public ConfigurationStrSubstitutor(final StrLookup lookup) { 041 super(lookup); 042 } 043 044 public ConfigurationStrSubstitutor(final StrSubstitutor other) { 045 super(other); 046 } 047 048 @Override 049 boolean isRecursiveEvaluationAllowed() { 050 return true; 051 } 052 053 @Override 054 void setRecursiveEvaluationAllowed(final boolean recursiveEvaluationAllowed) { 055 throw new UnsupportedOperationException( 056 "recursiveEvaluationAllowed cannot be modified within ConfigurationStrSubstitutor"); 057 } 058 059 @Override 060 public String toString() { 061 return "ConfigurationStrSubstitutor{" + super.toString() + "}"; 062 } 063}