/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You 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 org.apache.commons.imaging.formats.tiff.write;
  
  import java.io.IOException;
  
  import org.apache.commons.imaging.ImagingException;
  import org.apache.commons.imaging.common.BinaryOutputStream;
  
  abstract class AbstractTiffOutputItem {
  
      public static class Value extends AbstractTiffOutputItem {
  
          static final int SHALLOW_SIZE = 32;
          private final byte[] bytes;
          private final String name;
  
          Value(final String name, final byte[] bytes) {
              this.name = name;
              this.bytes = bytes;
          }
  
          @Override
          public String getItemDescription() {
              return name;
          }
  
          @Override
          public int getItemLength() {
              return bytes.length;
          }
  
          public void updateValue(final byte[] bytes) throws ImagingException {
              if (this.bytes.length != bytes.length) {
                  throw new ImagingException("Updated data size mismatch: " + this.bytes.length + " vs. " + bytes.length);
              }
              System.arraycopy(bytes, 0, this.bytes, 0, bytes.length);
          }
  
          @Override
          public void writeItem(final BinaryOutputStream bos) throws IOException, ImagingException {
              bos.write(bytes);
          }
      }
  
      public static final long UNDEFINED_VALUE = -1;
  
      private long offset = UNDEFINED_VALUE;
  
      public abstract String getItemDescription();
  
      public abstract int getItemLength();
  
      protected long getOffset() {
          return offset;
      }
  
      protected void setOffset(final long offset) {
          this.offset = offset;
      }
  
      public abstract void writeItem(BinaryOutputStream bos) throws IOException, ImagingException;
  }