content: /*
   * Copyright 2002-2019 Drew Noakes and contributors
   *
   *    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
   *
   *        https://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.
   *
   * More information about this project is available at:
   *
   *    https://drewnoakes.com/code/exif/
   *    https://github.com/drewnoakes/metadata-extractor
   */
  package com.drew.metadata.mov;
  
  import com.drew.imaging.quicktime.QuickTimeHandler;
  import com.drew.lang.SequentialByteArrayReader;
  import com.drew.lang.annotations.NotNull;
  import com.drew.lang.annotations.Nullable;
  import com.drew.metadata.Metadata;
  import com.drew.metadata.mov.atoms.Atom;
  import com.drew.metadata.mov.metadata.QuickTimeMetadataDirectory;
  
  import java.io.IOException;
  
  /**
   * @author Payton Garland
   */
  public abstract class QuickTimeMetadataHandler extends QuickTimeHandler<QuickTimeDirectory>
  {
      public QuickTimeMetadataHandler(Metadata metadata)
      {
          super(metadata);
      }
  
      @NotNull
      @Override
      protected QuickTimeDirectory createDirectory()
      {
          return new QuickTimeMetadataDirectory();
      }
  
      @Override
      protected boolean shouldAcceptAtom(@NotNull Atom atom)
      {
          return atom.type.equals(QuickTimeAtomTypes.ATOM_HANDLER)
              || atom.type.equals(QuickTimeAtomTypes.ATOM_KEYS)
              || atom.type.equals(QuickTimeAtomTypes.ATOM_DATA);
      }
  
      @Override
      protected boolean shouldAcceptContainer(@NotNull Atom atom)
      {
          return atom.type.equals(QuickTimeContainerTypes.ATOM_METADATA_LIST);
      }
  
      @Override
      protected QuickTimeHandler<?> processAtom(@NotNull Atom atom, @Nullable byte[] payload, QuickTimeContext context) throws IOException
      {
          if (payload != null) {
              SequentialByteArrayReader reader = new SequentialByteArrayReader(payload);
              if (atom.type.equals(QuickTimeAtomTypes.ATOM_KEYS)) {
                  processKeys(reader);
              } else if (atom.type.equals(QuickTimeAtomTypes.ATOM_DATA)) {
                  processData(payload, reader);
              }
          }
          return this;
      }
  
      protected abstract void processKeys(@NotNull SequentialByteArrayReader reader) throws IOException;
  
      protected abstract void processData(@NotNull byte[] payload, @NotNull SequentialByteArrayReader reader) throws IOException;
  }
  