/*
    * 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.fieldtypes;
  
  import java.nio.ByteOrder;
  
  import org.apache.commons.imaging.ImagingException;
  import org.apache.commons.imaging.common.Allocator;
  import org.apache.commons.imaging.common.ByteConversions;
  import org.apache.commons.imaging.formats.tiff.TiffField;
  
  /**
   * Provides an implementation of the 8-byte integer field type specified by the BigTIFF extensions to the TIFF format.
   */
  public class FieldTypeLong8 extends AbstractFieldType {
      public FieldTypeLong8(final int type, final String name) {
          super(type, name, 8);
      }
  
      /**
       * Gets the value(s) for this field in the form of an array of long integers.
       *
       * @param entry the TIFF field as obtained from the source file.
       * @return a valid, potentially empty array of Java long integers.
       */
      @Override
      public Object getValue(final TiffField entry) {
          final byte[] bytes = entry.getByteArrayValue();
          if (entry.getCount() == 1) {
              return ByteConversions.toInt(bytes, entry.getByteOrder());
          }
          return ByteConversions.toLongs(bytes, entry.getByteOrder());
      }
  
      @Override
      public byte[] writeData(final Object o, final ByteOrder byteOrder) throws ImagingException {
          if (o instanceof Integer) {
              return ByteConversions.toBytes((Integer) o, byteOrder);
          }
          if (o instanceof int[]) {
              final int[] numbers = (int[]) o;
              return ByteConversions.toBytes(numbers, byteOrder);
          }
          if (!(o instanceof Integer[])) {
              throw new ImagingException("Invalid data", o);
          }
          final Integer[] numbers = (Integer[]) o;
          final int[] values = Allocator.intArray(numbers.length);
          System.arraycopy(numbers, 0, values, 0, values.length);
          return ByteConversions.toBytes(values, byteOrder);
      }
  
  }