content: /*
   * Copyright (C) 2012 Facebook, Inc.
   *
   * 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 io.airlift.drift.codec.internal.compiler;
  
  import com.google.errorprone.annotations.Immutable;
  import com.google.inject.Inject;
  import io.airlift.bytecode.DynamicClassLoader;
  import io.airlift.drift.codec.ThriftCodec;
  import io.airlift.drift.codec.ThriftCodecManager;
  import io.airlift.drift.codec.internal.ForCompiler;
  import io.airlift.drift.codec.internal.ThriftCodecFactory;
  import io.airlift.drift.codec.metadata.ThriftStructMetadata;
  
  import java.security.AccessController;
  import java.security.PrivilegedAction;
  
  /**
   * Creates Thrift codecs directly in byte code.
   */
  @Immutable
  public class CompilerThriftCodecFactory
          implements ThriftCodecFactory
  {
      private final boolean debug;
      private final DynamicClassLoader classLoader;
  
      @Inject
      public CompilerThriftCodecFactory(@ForCompiler ClassLoader parent)
      {
          this(false, parent);
      }
  
      public CompilerThriftCodecFactory(boolean debug)
      {
          this(debug, getPrivilegedClassLoader(CompilerThriftCodecFactory.class.getClassLoader()));
      }
  
      public CompilerThriftCodecFactory(boolean debug, ClassLoader parent)
      {
          this.debug = debug;
          this.classLoader = getPrivilegedClassLoader(parent);
      }
  
      @Override
      public ThriftCodec<?> generateThriftTypeCodec(ThriftCodecManager codecManager, ThriftStructMetadata metadata)
      {
          ThriftCodecByteCodeGenerator<?> generator = new ThriftCodecByteCodeGenerator<>(
                  codecManager,
                  metadata,
                  classLoader,
                  debug);
          return generator.getThriftCodec();
      }
  
      private static DynamicClassLoader getPrivilegedClassLoader(ClassLoader parent)
      {
          return AccessController.doPrivileged((PrivilegedAction<DynamicClassLoader>) () -> new DynamicClassLoader(parent));
      }
  }
  