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
026/**
027 * Provides an implementation of the 8-byte integer field type specified by the BigTIFF extensions to the TIFF format.
028 */
029public class FieldTypeLong8 extends AbstractFieldType {
030    public FieldTypeLong8(final int type, final String name) {
031        super(type, name, 8);
032    }
033
034    /**
035     * Gets the value(s) for this field in the form of an array of long integers.
036     *
037     * @param entry the TIFF field as obtained from the source file.
038     * @return a valid, potentially empty array of Java long integers.
039     */
040    @Override
041    public Object getValue(final TiffField entry) {
042        final byte[] bytes = entry.getByteArrayValue();
043        if (entry.getCount() == 1) {
044            return ByteConversions.toInt(bytes, entry.getByteOrder());
045        }
046        return ByteConversions.toLongs(bytes, entry.getByteOrder());
047    }
048
049    @Override
050    public byte[] writeData(final Object o, final ByteOrder byteOrder) throws ImagingException {
051        if (o instanceof Integer) {
052            return ByteConversions.toBytes((Integer) o, byteOrder);
053        }
054        if (o instanceof int[]) {
055            final int[] numbers = (int[]) o;
056            return ByteConversions.toBytes(numbers, byteOrder);
057        }
058        if (!(o instanceof Integer[])) {
059            throw new ImagingException("Invalid data", o);
060        }
061        final Integer[] numbers = (Integer[]) o;
062        final int[] values = Allocator.intArray(numbers.length);
063        System.arraycopy(numbers, 0, values, 0, values.length);
064        return ByteConversions.toBytes(values, byteOrder);
065    }
066
067}