    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}