| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.log4j.rewrite; |
| |
| import java.beans.Introspector; |
| import java.beans.PropertyDescriptor; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.log4j.Logger; |
| import org.apache.log4j.helpers.LogLog; |
| import org.apache.log4j.spi.LoggingEvent; |
| |
| /** |
| * This policy rewrites events by evaluating any |
| * JavaBean properties on the message object and adding them |
| * to the event properties. If the message object has a |
| * message property, the value of that property will be |
| * used as the message for the rewritten event and will |
| * not be added to the event properties. Values from the |
| * JavaBean properties will replace any existing property |
| * with the same name. |
| * |
| * The combination of the RewriteAppender and this policy |
| * performs the same actions as the ReflectionFilter from log4j 1.3. |
| */ |
| public class ReflectionRewritePolicy implements RewritePolicy { |
| /** |
| * {@inheritDoc} |
| */ |
| public LoggingEvent rewrite(final LoggingEvent source) { |
| Object msg = source.getMessage(); |
| if (!(msg instanceof String)) { |
| Object newMsg = msg; |
| Map rewriteProps = new HashMap(source.getProperties()); |
| |
| try { |
| PropertyDescriptor[] props = Introspector.getBeanInfo( |
| msg.getClass(), Object.class).getPropertyDescriptors(); |
| if (props.length > 0) { |
| for (int i=0;i<props.length;i++) { |
| try { |
| Object propertyValue = |
| props[i].getReadMethod().invoke(msg, |
| (Object[]) null); |
| if ("message".equalsIgnoreCase(props[i].getName())) { |
| newMsg = propertyValue; |
| } else { |
| rewriteProps.put(props[i].getName(), propertyValue); |
| } |
| } catch (Exception e) { |
| LogLog.warn("Unable to evaluate property " + |
| props[i].getName(), e); |
| } |
| } |
| return new LoggingEvent( |
| source.getFQNOfLoggerClass(), |
| source.getLogger() != null ? source.getLogger(): Logger.getLogger(source.getLoggerName()), |
| source.getTimeStamp(), |
| source.getLevel(), |
| newMsg, |
| source.getThreadName(), |
| source.getThrowableInformation(), |
| source.getNDC(), |
| source.getLocationInformation(), |
| rewriteProps); |
| } |
| } catch (Exception e) { |
| LogLog.warn("Unable to get property descriptors", e); |
| } |
| |
| } |
| return source; |
| } |
| } |