/*
    * 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.core.script;
  
  import org.apache.logging.log4j.core.config.Configuration;
  import org.apache.logging.log4j.core.config.Node;
  import org.apache.logging.log4j.core.config.plugins.Plugin;
  import org.apache.logging.log4j.core.config.plugins.PluginAttribute;
  import org.apache.logging.log4j.core.config.plugins.PluginConfiguration;
  import org.apache.logging.log4j.core.config.plugins.PluginFactory;
  
  /**
   * Contains a reference to a script defined elsewhere in the configuration.
   */
  @Plugin(name = "ScriptRef", category = Node.CATEGORY, printObject = true)
  public class ScriptRef extends AbstractScript {
  
      private final ScriptManager scriptManager;
  
      public ScriptRef(final String name, final ScriptManager scriptManager) {
          super(name, null, null);
          this.scriptManager = scriptManager;
      }
  
      @Override
      public String getLanguage() {
          final AbstractScript script = this.scriptManager.getScript(getName());
          return script != null ? script.getLanguage() : null;
      }
  
  
      @Override
      public String getScriptText() {
          final AbstractScript script = this.scriptManager.getScript(getName());
          return script != null ? script.getScriptText() : null;
      }
  
      @PluginFactory
      public static ScriptRef createReference(
              // @formatter:off
              @PluginAttribute("ref") final String name,
              @PluginConfiguration final Configuration configuration) {
              // @formatter:on
          if (name == null) {
              LOGGER.error("No script name provided");
              return null;
          }
          return new ScriptRef(name, configuration.getScriptManager());
  
      }
  
      @Override
      public String toString() {
          return "ref=" + getName();
      }
  }