content: /*
   * Copyright (C) 2015 The Android Open Source Project
   *
   * 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 com.android.tools.layoutlib.create;
  
  import org.objectweb.asm.ClassVisitor;
  import org.objectweb.asm.FieldVisitor;
  
  import java.util.Set;
  
  import static org.objectweb.asm.Opcodes.ACC_PRIVATE;
  import static org.objectweb.asm.Opcodes.ACC_PROTECTED;
  import static org.objectweb.asm.Opcodes.ACC_PUBLIC;
  
  /**
   * Promotes given fields to public visibility.
   */
  public class PromoteFieldClassAdapter extends ClassVisitor {
  
      private final Set<String> mFieldNames;
      private static final int CLEAR_PRIVATE_MASK = ~(ACC_PRIVATE | ACC_PROTECTED);
  
      public PromoteFieldClassAdapter(ClassVisitor cv, Set<String> fieldNames) {
          super(Main.ASM_VERSION, cv);
          mFieldNames = fieldNames;
      }
  
      @Override
      public FieldVisitor visitField(int access, String name, String desc, String signature,
              Object value) {
          if (mFieldNames.contains(name)) {
              if ((access & ACC_PUBLIC) == 0) {
                  access = (access & CLEAR_PRIVATE_MASK) | ACC_PUBLIC;
              }
          }
          return super.visitField(access, name, desc, signature, value);
      }
  }
  