content: package act;
  
  /*-
   * #%L
   * ACT Framework
   * %%
   * Copyright (C) 2014 - 2017 ActFramework
   * %%
   * 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.
   * #L%
   */
  
  import static act.Destroyable.Util.tryDestroyAll;
  
  import act.app.App;
  import act.asm.ClassWriter;
  import act.util.*;
  import org.osgl.$;
  
  import java.util.*;
  import javax.enterprise.context.ApplicationScoped;
  
  public class BytecodeEnhancerManager extends LogSupportedDestroyableBase {
      private List<AppByteCodeEnhancer> appEnhancers = new ArrayList<>();
      private List<AsmByteCodeEnhancer> generalEnhancers = new ArrayList<>();
  
      public BytecodeEnhancerManager() {
      }
  
      public void register(AsmByteCodeEnhancer enhancer) {
          if (enhancer instanceof AppByteCodeEnhancer) {
              appEnhancers.add((AppByteCodeEnhancer) enhancer);
          } else {
              generalEnhancers.add(enhancer);
          }
      }
  
      public void register(AppByteCodeEnhancer enhancer) {
          appEnhancers.add(enhancer);
      }
  
      public void registered() {
          Collections.sort(appEnhancers);
      }
  
      public ByteCodeVisitor appEnhancer(App app, String className, $.Var<ClassWriter> cw) {
          List<AppByteCodeEnhancer> l = appFilter(app, className);
          return l.isEmpty() ? null : ByteCodeVisitor.chain(cw, l);
      }
  
      public ByteCodeVisitor generalEnhancer(String className, $.Var<ClassWriter> cw) {
          List<AsmByteCodeEnhancer> l = generalFilter(className);
          return l.isEmpty() ? null : ByteCodeVisitor.chain(cw, l);
      }
  
      private List<AppByteCodeEnhancer> appFilter(App app, String className) {
          List<AppByteCodeEnhancer> l = new ArrayList<>();
          for (AppByteCodeEnhancer e : appEnhancers) {
              AppByteCodeEnhancer e0 = (AppByteCodeEnhancer) e.clone();
              e0.app(app);
              if (e0.isTargetClass(className)) {
                  l.add(e0);
              }
          }
          return l;
      }
  
      private List<AsmByteCodeEnhancer> generalFilter(String className) {
          List<AsmByteCodeEnhancer> l = new ArrayList<>();
          for (AsmByteCodeEnhancer e : generalEnhancers) {
              AsmByteCodeEnhancer e0 = e.clone();
              if (e0.isTargetClass(className)) {
                  l.add(e0.clone());
              }
          }
          return l;
      }
  
      @Override
      protected void releaseResources() {
          tryDestroyAll(appEnhancers, ApplicationScoped.class);
          appEnhancers.clear();
          tryDestroyAll(generalEnhancers, ApplicationScoped.class);
          generalEnhancers.clear();
      }
  }
  