content: package act.util;
  
  /*-
   * #%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 act.app.AppByteCodeScannerBase;
  import act.app.event.SysEventId;
  import act.asm.AnnotationVisitor;
  import act.asm.Type;
  import act.event.SysEventListenerBase;
  
  import java.util.EventObject;
  
  public class ClassInfoByteCodeScanner extends AppByteCodeScannerBase {
  
      private ClassInfoRepository classInfoRepository;
  
      public ClassInfoByteCodeScanner(ClassInfoRepository classInfoRepository) {
          this.classInfoRepository = classInfoRepository;
      }
  
      public ClassInfoByteCodeScanner() {
      }
  
      @Override
      protected void onAppSet() {
          app().eventBus().bind(SysEventId.CLASS_LOADER_INITIALIZED, new SysEventListenerBase("init-class-info-repo") {
              @Override
              public void on(EventObject event) {
                  classInfoRepository = app().classLoader().classInfoRepository();
              }
          });
      }
  
      @Override
      protected boolean shouldScan(String className) {
          return true;
      }
  
      @Override
      public ByteCodeVisitor byteCodeVisitor() {
          return new _ByteCodeVisitor();
      }
  
      @Override
      public void scanFinished(String className) {
      }
  
      private class _ByteCodeVisitor extends ByteCodeVisitor {
  
          ClassNode me;
  
          @Override
          public void visit(int version, int access, String name, String signature, String superName, String[] interfaces) {
              super.visit(version, access, name, signature, superName, interfaces);
              if (null == superName) {
                  return; // ignore java.lang.Object
              }
              String superType = Type.getObjectType(superName).getClassName();
              String myName = Type.getObjectType(name).getClassName();
              me = classInfoRepository.node(myName);
              if (me.modifiers() == 0) {
                  // ASM access some how contains non-class modifiers, get rid of them
                  access &= ~ACC_SYNCHRONIZED;
                  access &= ~ACC_VOLATILE;
                  access &= ~ACC_BRIDGE;
                  access &= ~ACC_VARARGS;
                  access &= ~ACC_TRANSIENT;
                  access &= ~ACC_NATIVE;
                  access &= ~ACC_STRICT;
                  access &= ~ACC_MANDATED;
                  me.modifiers(access);
              }
              if (!me.hasInterfaces() && null != interfaces) {
                  for (String intf: interfaces) {
                      me.addInterface(intf);
                  }
              }
              if (null == me.parent() && !Object.class.getName().equals(superType)) {
                  me.parent(superType);
              }
          }
  
          @Override
          public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
              String annotationType = Type.getType(desc).getClassName();
              me.annotatedWith(annotationType);
              return super.visitAnnotation(desc, visible);
          }
      }
  }
  