| /* |
| * 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.logging.log4j.layout.template.json.resolver; |
| |
| import org.apache.logging.log4j.plugins.Plugin; |
| import org.apache.logging.log4j.plugins.PluginFactory; |
| import org.apache.logging.log4j.layout.template.json.JsonTemplateLayout; |
| |
| import java.util.Collections; |
| |
| /** |
| * Interceptor to add a root object key to the event template. |
| * |
| * @see JsonTemplateLayout.Builder#getEventTemplateRootObjectKey() |
| */ |
| @Plugin(name = "EventRootObjectKeyInterceptor", category = TemplateResolverInterceptor.CATEGORY) |
| public class EventRootObjectKeyInterceptor implements EventResolverInterceptor { |
| |
| private static final EventRootObjectKeyInterceptor INSTANCE = |
| new EventRootObjectKeyInterceptor(); |
| |
| private EventRootObjectKeyInterceptor() {} |
| |
| @PluginFactory |
| public static EventRootObjectKeyInterceptor getInstance() { |
| return INSTANCE; |
| } |
| |
| @Override |
| public Object processTemplateBeforeResolverInjection( |
| final EventResolverContext context, |
| final Object node) { |
| final String eventTemplateRootObjectKey = context.getEventTemplateRootObjectKey(); |
| return eventTemplateRootObjectKey != null |
| ? Collections.singletonMap(eventTemplateRootObjectKey, node) |
| : node; |
| } |
| |
| } |