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17 package org.apache.commons.imaging.formats.tiff.fieldtypes;
18
19 import java.nio.ByteOrder;
20 import java.util.Arrays;
21
22 import org.apache.commons.imaging.ImagingException;
23 import org.apache.commons.imaging.common.Allocator;
24 import org.apache.commons.imaging.common.ByteConversions;
25 import org.apache.commons.imaging.common.RationalNumber;
26 import org.apache.commons.imaging.formats.tiff.TiffField;
27
28 public class FieldTypeRational extends AbstractFieldType {
29 public FieldTypeRational(final int type, final String name) {
30 super(type, name, 8);
31 }
32
33 @Override
34 public Object getValue(final TiffField entry) {
35 final byte[] bytes = entry.getByteArrayValue();
36 final boolean unsignedType = entry.getFieldType() != SRATIONAL;
37 if (entry.getCount() == 1) {
38 return ByteConversions.toRational(bytes, entry.getByteOrder(), unsignedType);
39 }
40 return ByteConversions.toRationals(bytes, entry.getByteOrder(), unsignedType);
41 }
42
43 @Override
44 public byte[] writeData(final Object o, final ByteOrder byteOrder) throws ImagingException {
45 if (o instanceof RationalNumber) {
46 return ByteConversions.toBytes((RationalNumber) o, byteOrder);
47 }
48 if (o instanceof RationalNumber[]) {
49 return ByteConversions.toBytes((RationalNumber[]) o, byteOrder);
50 }
51 if (o instanceof Number) {
52 final Number number = (Number) o;
53 return ByteConversions.toBytes(RationalNumber.valueOf(number.doubleValue()), byteOrder);
54 }
55 if (o instanceof Number[]) {
56 final Number[] numbers = (Number[]) o;
57 final RationalNumber[] rationalNumbers = Allocator.array(numbers.length, RationalNumber[]::new, RationalNumber.SHALLOW_SIZE);
58 Arrays.setAll(rationalNumbers, RationalNumber::valueOf);
59 return ByteConversions.toBytes(rationalNumbers, byteOrder);
60 }
61 if (!(o instanceof double[])) {
62 throw new ImagingException("Invalid data", o);
63 }
64 final double[] numbers = (double[]) o;
65 final RationalNumber[] rationalNumbers = Allocator.array(numbers.length, RationalNumber[]::new, RationalNumber.SHALLOW_SIZE);
66 Arrays.setAll(rationalNumbers, RationalNumber::valueOf);
67 return ByteConversions.toBytes(rationalNumbers, byteOrder);
68 }
69 }