text: /*
   * Copyright © 2015 Stefan Niederhauser (nidin@gmx.ch)
   *
   * Licensed 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 guru.nidi.graphviz.engine;
  
  public class JdkJavascriptEngine implements JavascriptEngine {
      private final JavascriptEngine engine;
  
      public JdkJavascriptEngine() {
          engine = newEngine();
      }
  
      private JavascriptEngine newEngine() {
          try {
              return new GraalJavascriptEngine();
          } catch (ExceptionInInitializerError | NoClassDefFoundError | IllegalStateException e) {
              return new NashornJavascriptEngine();
          }
      }
  
      @Override
      public void executeJavascript(String raw) {
          engine.executeJavascript(raw);
      }
  
      @Override
      public String executeJavascript(String pre, String src, String post) {
          return engine.executeJavascript(pre, src, post);
      }
  
      @Override
      public void close() throws Exception {
          engine.close();
      }
  }
  