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.tiff;
  
  import com.drew.imaging.tiff.TiffHandler;
  import com.drew.lang.Rational;
  import com.drew.lang.annotations.NotNull;
  import com.drew.lang.annotations.Nullable;
  import com.drew.metadata.Directory;
  import com.drew.metadata.ErrorDirectory;
  import com.drew.metadata.Metadata;
  import com.drew.metadata.StringValue;
  
  import java.util.Stack;
  
  /**
   * Adapter between the {@link TiffHandler} interface and the {@link Metadata}/{@link Directory} object model.
   *
   * @author Drew Noakes https://drewnoakes.com
   */
  public abstract class DirectoryTiffHandler implements TiffHandler
  {
      private final Stack<Directory> _directoryStack = new Stack<Directory>();
  
      @Nullable private Directory _rootParentDirectory;
      @Nullable protected Directory _currentDirectory;
      protected final Metadata _metadata;
  
      protected DirectoryTiffHandler(Metadata metadata, @Nullable Directory parentDirectory)
      {
          _metadata = metadata;
          _rootParentDirectory = parentDirectory;
      }
  
      public void endingIFD()
      {
          _currentDirectory = _directoryStack.empty() ? null : _directoryStack.pop();
      }
  
      protected void pushDirectory(@NotNull Class<? extends Directory> directoryClass)
      {
          Directory newDirectory;
  
          try {
              newDirectory = directoryClass.newInstance();
          } catch (InstantiationException e) {
              throw new RuntimeException(e);
          } catch (IllegalAccessException e) {
              throw new RuntimeException(e);
          }
  
          pushDirectory(newDirectory);
      }
  
      protected void pushDirectory(@NotNull Directory directory)
      {
          // If this is the first directory, don't add to the stack
          if (_currentDirectory == null) {
              // Apply any pending root parent to this new directory
              if (_rootParentDirectory != null) {
                  directory.setParent(_rootParentDirectory);
                  _rootParentDirectory = null;
              }
          }
          else {
              // The current directory is pushed onto the stack, and set as the new directory's parent
              _directoryStack.push(_currentDirectory);
              directory.setParent(_currentDirectory);
          }
  
          _currentDirectory = directory;
          _metadata.addDirectory(_currentDirectory);
      }
  
      public void warn(@NotNull String message)
      {
          getCurrentOrErrorDirectory().addError(message);
      }
  
      public void error(@NotNull String message)
      {
          getCurrentOrErrorDirectory().addError(message);
      }
  
      @NotNull
      private Directory getCurrentOrErrorDirectory()
      {
          if (_currentDirectory != null)
              return _currentDirectory;
          ErrorDirectory error = _metadata.getFirstDirectoryOfType(ErrorDirectory.class);
          if (error != null)
              return error;
          pushDirectory(ErrorDirectory.class);
          return _currentDirectory;
      }
  
      public void setByteArray(int tagId, @NotNull byte[] bytes)
      {
          _currentDirectory.setByteArray(tagId, bytes);
      }
  
      public void setString(int tagId, @NotNull StringValue string)
      {
          _currentDirectory.setStringValue(tagId, string);
      }
  
      public void setRational(int tagId, @NotNull Rational rational)
      {
          _currentDirectory.setRational(tagId, rational);
      }
  
      public void setRationalArray(int tagId, @NotNull Rational[] array)
      {
          _currentDirectory.setRationalArray(tagId, array);
      }
  
      public void setFloat(int tagId, float float32)
      {
          _currentDirectory.setFloat(tagId, float32);
      }
  
      public void setFloatArray(int tagId, @NotNull float[] array)
      {
          _currentDirectory.setFloatArray(tagId, array);
      }
  
      public void setDouble(int tagId, double double64)
      {
          _currentDirectory.setDouble(tagId, double64);
      }
  
      public void setDoubleArray(int tagId, @NotNull double[] array)
      {
          _currentDirectory.setDoubleArray(tagId, array);
      }
  
      public void setInt8s(int tagId, byte int8s)
      {
          // NOTE Directory stores all integral types as int32s, except for int32u and long
          _currentDirectory.setInt(tagId, int8s);
      }
  
      public void setInt8sArray(int tagId, @NotNull byte[] array)
      {
          // NOTE Directory stores all integral types as int32s, except for int32u and long
          _currentDirectory.setByteArray(tagId, array);
      }
  
      public void setInt8u(int tagId, short int8u)
      {
          // NOTE Directory stores all integral types as int32s, except for int32u and long
          _currentDirectory.setInt(tagId, int8u);
      }
  
      public void setInt8uArray(int tagId, @NotNull short[] array)
      {
          // TODO create and use a proper setter for short[]
          _currentDirectory.setObjectArray(tagId, array);
      }
  
      public void setInt16s(int tagId, int int16s)
      {
          // TODO create and use a proper setter for int16u?
          _currentDirectory.setInt(tagId, int16s);
      }
  
      public void setInt16sArray(int tagId, @NotNull short[] array)
      {
          // TODO create and use a proper setter for short[]
          _currentDirectory.setObjectArray(tagId, array);
      }
  
      public void setInt16u(int tagId, int int16u)
      {
          // TODO create and use a proper setter for
          _currentDirectory.setInt(tagId, int16u);
      }
  
      public void setInt16uArray(int tagId, @NotNull int[] array)
      {
          // TODO create and use a proper setter for short[]
          _currentDirectory.setObjectArray(tagId, array);
      }
  
      public void setInt32s(int tagId, int int32s)
      {
          _currentDirectory.setInt(tagId, int32s);
      }
  
      public void setInt32sArray(int tagId, @NotNull int[] array)
      {
          _currentDirectory.setIntArray(tagId, array);
      }
  
      public void setInt32u(int tagId, long int32u)
      {
          _currentDirectory.setLong(tagId, int32u);
      }
  
      public void setInt32uArray(int tagId, @NotNull long[] array)
      {
          // TODO create and use a proper setter for short[]
          _currentDirectory.setObjectArray(tagId, array);
      }
  }
  