001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.imaging.formats.tiff.fieldtypes;
018
019import java.nio.ByteOrder;
020
021import org.apache.commons.imaging.ImagingException;
022import org.apache.commons.imaging.common.Allocator;
023import org.apache.commons.imaging.common.ByteConversions;
024import org.apache.commons.imaging.formats.tiff.TiffField;
025
026public class FieldTypeShort extends AbstractFieldType {
027    public FieldTypeShort(final int type, final String name) {
028        super(type, name, 2);
029    }
030
031    @Override
032    public Object getValue(final TiffField entry) {
033        final byte[] bytes = entry.getByteArrayValue();
034        if (entry.getCount() == 1) {
035            return ByteConversions.toShort(bytes, entry.getByteOrder());
036        }
037        return ByteConversions.toShorts(bytes, entry.getByteOrder());
038    }
039
040    @Override
041    public byte[] writeData(final Object o, final ByteOrder byteOrder) throws ImagingException {
042        if (o instanceof Short) {
043            return ByteConversions.toBytes(((Short) o).shortValue(), byteOrder);
044        }
045        if (o instanceof short[]) {
046            final short[] numbers = (short[]) o;
047            return ByteConversions.toBytes(numbers, byteOrder);
048        }
049        if (!(o instanceof Short[])) {
050            throw new ImagingException("Invalid data", o);
051        }
052        final Short[] numbers = (Short[]) o;
053        final short[] values = Allocator.shortArray(numbers.length);
054        for (int i = 0; i < values.length; i++) {
055            values[i] = numbers[i].shortValue();
056        }
057        return ByteConversions.toBytes(values, byteOrder);
058    }
059
060}