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/*
* Copyright (c) 2015, Harald Kuhr
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.twelvemonkeys.imageio.plugins.tiff;
import com.twelvemonkeys.imageio.AbstractMetadata;
import com.twelvemonkeys.imageio.metadata.Directory;
import com.twelvemonkeys.imageio.metadata.Entry;
import com.twelvemonkeys.imageio.metadata.tiff.IFD;
import com.twelvemonkeys.imageio.metadata.tiff.Rational;
import com.twelvemonkeys.imageio.metadata.tiff.TIFF;
import com.twelvemonkeys.imageio.metadata.tiff.TIFFEntry;
import com.twelvemonkeys.lang.Validate;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import javax.imageio.metadata.IIOInvalidTreeException;
import javax.imageio.metadata.IIOMetadataFormatImpl;
import javax.imageio.metadata.IIOMetadataNode;
import java.lang.reflect.Array;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
/**
* TIFFImageMetadata.
*
* @author Harald Kuhr
* @author last modified by $Author: harald.kuhr$
* @version $Id: TIFFImageMetadata.java,v 1.0 17/04/15 harald.kuhr Exp$
*/
public final class TIFFImageMetadata extends AbstractMetadata {
static final int RATIONAL_SCALE_FACTOR = 100000;
private final Directory original;
private Directory ifd;
/**
* Creates an empty TIFF metadata object.
*
* Client code can update or change the metadata using the
* {@link #setFromTree(String, Node)}
* or {@link #mergeTree(String, Node)} methods.
*/
public TIFFImageMetadata() {
this(new IFD(Collections.emptyList()));
}
/**
* Creates a TIFF metadata object, using the values from the given IFD.
*
* Client code can update or change the metadata using the
* {@link #setFromTree(String, Node)}
* or {@link #mergeTree(String, Node)} methods.
*/
public TIFFImageMetadata(final Directory ifd) {
super(true, TIFFMedataFormat.SUN_NATIVE_IMAGE_METADATA_FORMAT_NAME, TIFFMedataFormat.class.getName(), null, null);
this.ifd = Validate.notNull(ifd, "IFD");
this.original = ifd;
}
/**
* Creates a TIFF metadata object, using the values from the given entries.
*
* Client code can update or change the metadata using the
* {@link #setFromTree(String, Node)}
* or {@link #mergeTree(String, Node)} methods.
*/
public TIFFImageMetadata(final Collection entries) {
this(new IFD(entries));
}
protected IIOMetadataNode getNativeTree() {
IIOMetadataNode root = new IIOMetadataNode(nativeMetadataFormatName);
root.appendChild(asTree(ifd));
return root;
}
private IIOMetadataNode asTree(final Directory ifd) {
IIOMetadataNode ifdNode = new IIOMetadataNode("TIFFIFD");
for (Entry tag : ifd) {
IIOMetadataNode tagNode;
Object value = tag.getValue();
if (value instanceof Directory) {
// TODO: Don't expand non-TIFF IFDs...
tagNode = asTree((Directory) value);
tagNode.setAttribute("parentTagNumber", String.valueOf(tag.getIdentifier()));
String fieldName = tag.getFieldName();
if (fieldName != null) {
tagNode.setAttribute("parentTagName", fieldName);
}
// TODO: tagSets is REQUIRED!
}
else {
tagNode = new IIOMetadataNode("TIFFField");
tagNode.setAttribute("number", String.valueOf(tag.getIdentifier()));
String fieldName = tag.getFieldName();
if (fieldName != null) {
tagNode.setAttribute("name", fieldName);
}
int count = tag.valueCount();
if (TIFF.TYPE_NAMES[TIFF.TYPE_UNDEFINED].equals(tag.getTypeName())) {
// Why does "undefined" need special handling?! It's just a byte array.. :-P
// Or maybe rather, why isn't all types implemented like this..?
// TODO: Consider handling IPTC, Photoshop/Adobe, XMP and ICC Profile as Undefined always
// (even if older software wrote as Byte), as it's more compact?
IIOMetadataNode valueNode = new IIOMetadataNode("TIFFUndefined");
tagNode.appendChild(valueNode);
if (count == 1 && (value == null || !value.getClass().isArray())) {
valueNode.setAttribute("value", String.valueOf(value));
}
else {
valueNode.setAttribute("value", Arrays.toString((byte[]) value).replaceAll("\\[?\\]?", ""));
}
}
else {
String arrayTypeName = getMetadataArrayType(tag);
IIOMetadataNode valueNode = new IIOMetadataNode(arrayTypeName);
tagNode.appendChild(valueNode);
boolean unsigned = !isSignedType(tag);
String typeName = getMetadataType(tag);
// NOTE: ASCII/Strings have count 1, always. This seems consistent with the JAI ImageIO version.
if (count == 1 && (value == null || !value.getClass().isArray())) {
IIOMetadataNode elementNode = new IIOMetadataNode(typeName);
valueNode.appendChild(elementNode);
setTIFFNativeValue(value, unsigned, elementNode);
}
else {
for (int i = 0; i < count; i++) {
Object val = Array.get(value, i);
IIOMetadataNode elementNode = new IIOMetadataNode(typeName);
valueNode.appendChild(elementNode);
setTIFFNativeValue(val, unsigned, elementNode);
}
}
}
}
ifdNode.appendChild(tagNode);
}
return ifdNode;
}
private void setTIFFNativeValue(final Object value, final boolean unsigned, final IIOMetadataNode elementNode) {
if (unsigned && value instanceof Byte) {
elementNode.setAttribute("value", String.valueOf((Byte) value & 0xFF));
}
else if (unsigned && value instanceof Short) {
elementNode.setAttribute("value", String.valueOf((Short) value & 0xFFFF));
}
else if (unsigned && value instanceof Integer) {
elementNode.setAttribute("value", String.valueOf((Integer) value & 0xFFFFFFFFl));
}
else {
elementNode.setAttribute("value", String.valueOf(value));
}
}
private boolean isSignedType(final Entry tag) {
String typeName = tag.getTypeName();
// Stupid special cases implementation, until we can access the type id...
if ("SBYTE".equals(typeName)) {
return true;
}
if ("SSHORT".equals(typeName)) {
return true;
}
if ("SLONG".equals(typeName)) {
return true;
}
if ("SRATIONAL".equals(typeName)) {
return true;
}
if ("FLOAT".equals(typeName)) {
return true;
}
if ("DOUBLE".equals(typeName)) {
return true;
}
if ("SLONG8".equals(typeName)) {
return true;
}
// IFD8 not used
return false;
}
private String getMetadataArrayType(final Entry tag) {
String typeName = tag.getTypeName();
// Stupid special cases implementation, until we can access the type id...
if ("BYTE".equals(typeName)) {
return "TIFFBytes";
}
if ("ASCII".equals(typeName)) {
return "TIFFAsciis";
}
if ("SHORT".equals(typeName)) {
return "TIFFShorts";
}
if ("LONG".equals(typeName)) {
return "TIFFLongs";
}
if ("RATIONAL".equals(typeName)) {
return "TIFFRationals";
}
// UNDEFINED not used...
if ("SBYTE".equals(typeName)) {
return "TIFFSBytes";
}
if ("SSHORT".equals(typeName)) {
return "TIFFSShorts";
}
if ("SLONG".equals(typeName)) {
return "TIFFSLongs";
}
if ("SRATIONAL".equals(typeName)) {
return "TIFFSRationals";
}
if ("FLOAT".equals(typeName)) {
return "TIFFFloats";
}
if ("DOUBLE".equals(typeName)) {
return "TIFFDoubles";
}
// IFD not used
if ("LONG8".equals(typeName)) {
return "TIFFLong8s";
}
if ("SLONG8".equals(typeName)) {
return "TIFFSLong8s";
}
// IFD8 not used
throw new IllegalArgumentException(typeName);
}
private String getMetadataType(final Entry tag) {
String typeName = tag.getTypeName();
// Stupid special cases implementation, until we can access the type id...
if ("BYTE".equals(typeName)) {
return "TIFFByte";
}
if ("ASCII".equals(typeName)) {
return "TIFFAscii";
}
if ("SHORT".equals(typeName)) {
return "TIFFShort";
}
if ("LONG".equals(typeName)) {
return "TIFFLong";
}
if ("RATIONAL".equals(typeName)) {
return "TIFFRational";
}
// UNDEFINED not used...
if ("SBYTE".equals(typeName)) {
return "TIFFSByte";
}
if ("SSHORT".equals(typeName)) {
return "TIFFSShort";
}
if ("SLONG".equals(typeName)) {
return "TIFFSLong";
}
if ("SRATIONAL".equals(typeName)) {
return "TIFFSRational";
}
if ("FLOAT".equals(typeName)) {
return "TIFFFloat";
}
if ("DOUBLE".equals(typeName)) {
return "TIFFDouble";
}
// IFD not used
if ("LONG8".equals(typeName)) {
return "TIFFLong8";
}
if ("SLONG8".equals(typeName)) {
return "TIFFSLong8";
}
// IFD8 not used
throw new IllegalArgumentException(typeName);
}
// TODO: Candidate superclass method!
private IIOMetadataNode addChildNode(final IIOMetadataNode parent,
final String name,
final Object object) {
IIOMetadataNode child = new IIOMetadataNode(name);
if (object != null) {
child.setUserObject(object); // TODO: Should we always store user object?!?!
child.setNodeValue(object.toString()); // TODO: Fix this line
}
parent.appendChild(child);
return child;
}
/// Standard metadata
// See: http://download.java.net/media/jai-imageio/javadoc/1.1/com/sun/media/imageio/plugins/tiff/package-summary.html
@Override
protected IIOMetadataNode getStandardChromaNode() {
IIOMetadataNode chroma = new IIOMetadataNode("Chroma");
// Handle ColorSpaceType (RGB/CMYK/YCbCr etc)...
Entry photometricTag = ifd.getEntryById(TIFF.TAG_PHOTOMETRIC_INTERPRETATION);
int photometricValue = getValueAsInt(photometricTag); // No default for this tag!
int numChannelsValue = getSamplesPerPixelWithFallback();
IIOMetadataNode colorSpaceType = new IIOMetadataNode("ColorSpaceType");
chroma.appendChild(colorSpaceType);
switch (photometricValue) {
case TIFFBaseline.PHOTOMETRIC_WHITE_IS_ZERO:
case TIFFBaseline.PHOTOMETRIC_BLACK_IS_ZERO:
case TIFFBaseline.PHOTOMETRIC_MASK: // It's really a transparency mask/alpha channel, but...
colorSpaceType.setAttribute("name", "GRAY");
break;
case TIFFBaseline.PHOTOMETRIC_RGB:
case TIFFBaseline.PHOTOMETRIC_PALETTE:
colorSpaceType.setAttribute("name", "RGB");
break;
case TIFFExtension.PHOTOMETRIC_YCBCR:
colorSpaceType.setAttribute("name", "YCbCr");
break;
case TIFFExtension.PHOTOMETRIC_CIELAB:
case TIFFExtension.PHOTOMETRIC_ICCLAB:
case TIFFExtension.PHOTOMETRIC_ITULAB:
colorSpaceType.setAttribute("name", "Lab");
break;
case TIFFExtension.PHOTOMETRIC_SEPARATED:
// TODO: May be CMYK, or something else... Consult InkSet and NumberOfInks!
if (numChannelsValue == 3) {
colorSpaceType.setAttribute("name", "CMY");
}
else {
colorSpaceType.setAttribute("name", "CMYK");
}
break;
case TIFFCustom.PHOTOMETRIC_LOGL: // ..?
case TIFFCustom.PHOTOMETRIC_LOGLUV:
colorSpaceType.setAttribute("name", "Luv");
break;
case TIFFCustom.PHOTOMETRIC_CFA:
case TIFFCustom.PHOTOMETRIC_LINEAR_RAW: // ...or is this RGB?
colorSpaceType.setAttribute("name", "3CLR");
break;
default:
colorSpaceType.setAttribute("name", Integer.toHexString(numChannelsValue) + "CLR");
break;
}
// NumChannels
IIOMetadataNode numChannels = new IIOMetadataNode("NumChannels");
chroma.appendChild(numChannels);
if (photometricValue == TIFFBaseline.PHOTOMETRIC_PALETTE) {
numChannels.setAttribute("value", "3");
}
else {
numChannels.setAttribute("value", Integer.toString(numChannelsValue));
}
// BlackIsZero (defaults to TRUE)
IIOMetadataNode blackIsZero = new IIOMetadataNode("BlackIsZero");
chroma.appendChild(blackIsZero);
switch (photometricValue) {
case TIFFBaseline.PHOTOMETRIC_WHITE_IS_ZERO:
blackIsZero.setAttribute("value", "FALSE");
break;
default:
break;
}
Entry colorMapTag = ifd.getEntryById(TIFF.TAG_COLOR_MAP);
if (colorMapTag != null) {
int[] colorMapValues = (int[]) colorMapTag.getValue();
IIOMetadataNode palette = new IIOMetadataNode("Palette");
chroma.appendChild(palette);
int count = colorMapValues.length / 3;
for (int i = 0; i < count; i++) {
IIOMetadataNode paletteEntry = new IIOMetadataNode("PaletteEntry");
paletteEntry.setAttribute("index", Integer.toString(i));
// TODO: See TIFFImageReader createIndexColorModel, to detect 8 bit colorMap
paletteEntry.setAttribute("red", Integer.toString((colorMapValues[i] >> 8) & 0xff));
paletteEntry.setAttribute("green", Integer.toString((colorMapValues[i + count] >> 8) & 0xff));
paletteEntry.setAttribute("blue", Integer.toString((colorMapValues[i + count * 2] >> 8) & 0xff));
palette.appendChild(paletteEntry);
}
}
return chroma;
}
private int getSamplesPerPixelWithFallback() {
// SamplePerPixel defaults to 1, but we'll check BitsPerSample to be sure
Entry samplesPerPixelTag = ifd.getEntryById(TIFF.TAG_SAMPLES_PER_PIXEL);
Entry bitsPerSampleTag = ifd.getEntryById(TIFF.TAG_BITS_PER_SAMPLE);
return samplesPerPixelTag != null
? getValueAsInt(samplesPerPixelTag)
: bitsPerSampleTag != null ? bitsPerSampleTag.valueCount() : 1;
}
@Override
protected IIOMetadataNode getStandardCompressionNode() {
IIOMetadataNode compression = new IIOMetadataNode("Compression");
IIOMetadataNode compressionTypeName = addChildNode(compression, "CompressionTypeName", null);
Entry compressionTag = ifd.getEntryById(TIFF.TAG_COMPRESSION);
int compressionValue = compressionTag == null
? TIFFBaseline.COMPRESSION_NONE
: getValueAsInt(compressionTag);
// Naming is identical to JAI ImageIO metadata as far as possible
switch (compressionValue) {
case TIFFBaseline.COMPRESSION_NONE:
compressionTypeName.setAttribute("value", "None");
break;
case TIFFBaseline.COMPRESSION_CCITT_MODIFIED_HUFFMAN_RLE:
compressionTypeName.setAttribute("value", "CCITT RLE");
break;
case TIFFExtension.COMPRESSION_CCITT_T4:
compressionTypeName.setAttribute("value", "CCITT T4");
break;
case TIFFExtension.COMPRESSION_CCITT_T6:
compressionTypeName.setAttribute("value", "CCITT T6");
break;
case TIFFExtension.COMPRESSION_LZW:
compressionTypeName.setAttribute("value", "LZW");
break;
case TIFFExtension.COMPRESSION_OLD_JPEG:
compressionTypeName.setAttribute("value", "Old JPEG");
break;
case TIFFExtension.COMPRESSION_JPEG:
compressionTypeName.setAttribute("value", "JPEG");
break;
case TIFFExtension.COMPRESSION_ZLIB:
compressionTypeName.setAttribute("value", "ZLib");
break;
case TIFFExtension.COMPRESSION_DEFLATE:
compressionTypeName.setAttribute("value", "Deflate");
break;
case TIFFBaseline.COMPRESSION_PACKBITS:
compressionTypeName.setAttribute("value", "PackBits");
break;
case TIFFCustom.COMPRESSION_CCITTRLEW:
compressionTypeName.setAttribute("value", "CCITT RLEW");
break;
case TIFFCustom.COMPRESSION_DCS:
compressionTypeName.setAttribute("value", "DCS");
break;
case TIFFCustom.COMPRESSION_IT8BL:
compressionTypeName.setAttribute("value", "IT8BL");
break;
case TIFFCustom.COMPRESSION_IT8CTPAD:
compressionTypeName.setAttribute("value", "IT8CTPAD");
break;
case TIFFCustom.COMPRESSION_IT8LW:
compressionTypeName.setAttribute("value", "IT8LW");
break;
case TIFFCustom.COMPRESSION_IT8MP:
compressionTypeName.setAttribute("value", "IT8MP");
break;
case TIFFCustom.COMPRESSION_JBIG:
compressionTypeName.setAttribute("value", "JBIG");
break;
case TIFFCustom.COMPRESSION_JPEG2000:
compressionTypeName.setAttribute("value", "JPEG 2000");
break;
case TIFFCustom.COMPRESSION_NEXT:
compressionTypeName.setAttribute("value", "NEXT");
break;
case TIFFCustom.COMPRESSION_PIXARFILM:
compressionTypeName.setAttribute("value", "Pixar Film");
break;
case TIFFCustom.COMPRESSION_PIXARLOG:
compressionTypeName.setAttribute("value", "Pixar Log");
break;
case TIFFCustom.COMPRESSION_SGILOG:
compressionTypeName.setAttribute("value", "SGI Log");
break;
case TIFFCustom.COMPRESSION_SGILOG24:
compressionTypeName.setAttribute("value", "SGI Log24");
break;
case TIFFCustom.COMPRESSION_THUNDERSCAN:
compressionTypeName.setAttribute("value", "ThunderScan");
break;
default:
compressionTypeName.setAttribute("value", "Unknown " + compressionValue);
break;
}
if (compressionValue != TIFFBaseline.COMPRESSION_NONE) {
// Lossless (defaults to TRUE)
IIOMetadataNode lossless = new IIOMetadataNode("Lossless");
compression.appendChild(lossless);
switch (compressionValue) {
case TIFFExtension.COMPRESSION_OLD_JPEG:
case TIFFExtension.COMPRESSION_JPEG:
case TIFFCustom.COMPRESSION_JBIG:
case TIFFCustom.COMPRESSION_JPEG2000:
lossless.setAttribute("value", "FALSE");
break;
default:
break;
}
}
return compression;
}
@Override
protected IIOMetadataNode getStandardDataNode() {
IIOMetadataNode node = new IIOMetadataNode("Data");
IIOMetadataNode planarConfiguration = new IIOMetadataNode("PlanarConfiguration");
Entry planarConfigurationTag = ifd.getEntryById(TIFF.TAG_PLANAR_CONFIGURATION);
int planarConfigurationValue = planarConfigurationTag == null
? TIFFBaseline.PLANARCONFIG_CHUNKY
: getValueAsInt(planarConfigurationTag);
switch (planarConfigurationValue) {
case TIFFBaseline.PLANARCONFIG_CHUNKY:
planarConfiguration.setAttribute("value", "PixelInterleaved");
break;
case TIFFExtension.PLANARCONFIG_PLANAR:
planarConfiguration.setAttribute("value", "PlaneInterleaved");
break;
default:
planarConfiguration.setAttribute("value", "Unknown " + planarConfigurationValue);
}
node.appendChild(planarConfiguration);
Entry photometricInterpretationTag = ifd.getEntryById(TIFF.TAG_PHOTOMETRIC_INTERPRETATION);
int photometricInterpretationValue = photometricInterpretationTag == null
? TIFFBaseline.PHOTOMETRIC_WHITE_IS_ZERO
: getValueAsInt(photometricInterpretationTag);
Entry samleFormatTag = ifd.getEntryById(TIFF.TAG_SAMPLE_FORMAT);
// TODO: Fix for sampleformat 1 1 1 (as int[]) ??!?!?
int sampleFormatValue = samleFormatTag == null
? TIFFBaseline.SAMPLEFORMAT_UINT
: getValueAsInt(samleFormatTag);
IIOMetadataNode sampleFormat = new IIOMetadataNode("SampleFormat");
node.appendChild(sampleFormat);
switch (sampleFormatValue) {
case TIFFBaseline.SAMPLEFORMAT_UINT:
if (photometricInterpretationValue == TIFFBaseline.PHOTOMETRIC_PALETTE) {
sampleFormat.setAttribute("value", "Index");
}
else {
sampleFormat.setAttribute("value", "UnsignedIntegral");
}
break;
case TIFFExtension.SAMPLEFORMAT_INT:
sampleFormat.setAttribute("value", "SignedIntegral");
break;
case TIFFExtension.SAMPLEFORMAT_FP:
sampleFormat.setAttribute("value", "Real");
break;
default:
sampleFormat.setAttribute("value", "Unknown " + sampleFormatValue);
break;
}
// TODO: See TIFFImageReader.getBitsPerSample + fix the metadata to have getAsXxxArray methods.
// BitsPerSample (not required field for Class B/Bilevel, defaults to 1)
Entry bitsPerSampleTag = ifd.getEntryById(TIFF.TAG_BITS_PER_SAMPLE);
String bitsPerSampleValue = bitsPerSampleTag == null
? "1"
: bitsPerSampleTag.getValueAsString().replaceAll("\\[?\\]?,?", "");
IIOMetadataNode bitsPerSample = new IIOMetadataNode("BitsPerSample");
node.appendChild(bitsPerSample);
bitsPerSample.setAttribute("value", bitsPerSampleValue);
int numChannelsValue = getSamplesPerPixelWithFallback();
// SampleMSB
Entry fillOrderTag = ifd.getEntryById(TIFF.TAG_FILL_ORDER);
int fillOrder = fillOrderTag != null
? getValueAsInt(fillOrderTag)
: TIFFBaseline.FILL_LEFT_TO_RIGHT;
IIOMetadataNode sampleMSB = new IIOMetadataNode("SampleMSB");
node.appendChild(sampleMSB);
if (fillOrder == TIFFBaseline.FILL_LEFT_TO_RIGHT) {
sampleMSB.setAttribute("value", createListValue(numChannelsValue, "0"));
}
else {
if ("1".equals(bitsPerSampleValue)) {
sampleMSB.setAttribute("value", createListValue(numChannelsValue, "7"));
}
else {
// TODO: FixMe for bitsPerSample > 8
sampleMSB.setAttribute("value", createListValue(numChannelsValue, "7"));
}
}
return node;
}
private static int getValueAsInt(final Entry entry) {
Object value = entry.getValue();
if (value instanceof Number) {
return ((Number) value).intValue();
}
else if (value instanceof short[]) {
return ((short[]) value)[0];
}
else if (value instanceof int[]) {
return ((int[]) value)[0];
}
throw new IllegalArgumentException("Unsupported type: " + entry);
}
// TODO: Candidate superclass method!
private String createListValue(final int itemCount, final String... values) {
StringBuilder buffer = new StringBuilder();
for (int i = 0; i < itemCount; i++) {
if (buffer.length() > 0) {
buffer.append(' ');
}
buffer.append(values[i % values.length]);
}
return buffer.toString();
}
@Override
protected IIOMetadataNode getStandardDimensionNode() {
IIOMetadataNode dimension = new IIOMetadataNode("Dimension");
// PixelAspectRatio
Entry xResTag = ifd.getEntryById(TIFF.TAG_X_RESOLUTION);
Entry yResTag = ifd.getEntryById(TIFF.TAG_Y_RESOLUTION);
double xSizeValue = 1 / (xResTag == null ? 72.0 : ((Number) xResTag.getValue()).doubleValue());
double ySizeValue = 1 / (xResTag == null ? 72.0 : ((Number) yResTag.getValue()).doubleValue());
IIOMetadataNode pixelAspectRatio = new IIOMetadataNode("PixelAspectRatio");
dimension.appendChild(pixelAspectRatio);
pixelAspectRatio.setAttribute("value", String.valueOf(xSizeValue / ySizeValue));
// ImageOrientation
Entry orientationTag = ifd.getEntryById(TIFF.TAG_ORIENTATION);
if (orientationTag != null) {
int orientationValue = getValueAsInt(orientationTag);
String value = null;
switch (orientationValue) {
case TIFFBaseline.ORIENTATION_TOPLEFT:
value = "Normal";
break;
case TIFFExtension.ORIENTATION_TOPRIGHT:
value = "FlipH";
break;
case TIFFExtension.ORIENTATION_BOTRIGHT:
value = "Rotate180";
break;
case TIFFExtension.ORIENTATION_BOTLEFT:
value = "FlipV";
break;
case TIFFExtension.ORIENTATION_LEFTTOP:
value = "FlipHRotate90";
break;
case TIFFExtension.ORIENTATION_RIGHTTOP:
value = "Rotate270";
break;
case TIFFExtension.ORIENTATION_RIGHTBOT:
value = "FlipVRotate90";
break;
case TIFFExtension.ORIENTATION_LEFTBOT:
value = "Rotate90";
break;
}
if (value != null) {
IIOMetadataNode imageOrientation = new IIOMetadataNode("ImageOrientation");
dimension.appendChild(imageOrientation);
imageOrientation.setAttribute("value", value);
}
}
Entry resUnitTag = ifd.getEntryById(TIFF.TAG_RESOLUTION_UNIT);
int resUnitValue = resUnitTag == null ? TIFFBaseline.RESOLUTION_UNIT_DPI : getValueAsInt(resUnitTag);
if (resUnitValue == TIFFBaseline.RESOLUTION_UNIT_CENTIMETER || resUnitValue == TIFFBaseline.RESOLUTION_UNIT_DPI) {
// 10 mm in 1 cm or 25.4 mm in 1 inch
double scale = resUnitValue == TIFFBaseline.RESOLUTION_UNIT_CENTIMETER ? 10 : 25.4;
// HorizontalPixelSize
// VerticalPixelSize
IIOMetadataNode horizontalPixelSize = new IIOMetadataNode("HorizontalPixelSize");
dimension.appendChild(horizontalPixelSize);
horizontalPixelSize.setAttribute("value", String.valueOf(xSizeValue * scale));
IIOMetadataNode verticalPixelSize = new IIOMetadataNode("VerticalPixelSize");
dimension.appendChild(verticalPixelSize);
verticalPixelSize.setAttribute("value", String.valueOf(ySizeValue * scale));
// HorizontalPosition
// VerticalPosition
Entry xPosTag = ifd.getEntryById(TIFF.TAG_X_POSITION);
Entry yPosTag = ifd.getEntryById(TIFF.TAG_Y_POSITION);
if (xPosTag != null && yPosTag != null) {
double xPosValue = ((Number) xPosTag.getValue()).doubleValue();
double yPosValue = ((Number) yPosTag.getValue()).doubleValue();
IIOMetadataNode horizontalPosition = new IIOMetadataNode("HorizontalPosition");
dimension.appendChild(horizontalPosition);
horizontalPosition.setAttribute("value", String.valueOf(xPosValue * scale));
IIOMetadataNode verticalPosition = new IIOMetadataNode("VerticalPosition");
dimension.appendChild(verticalPosition);
verticalPosition.setAttribute("value", String.valueOf(yPosValue * scale));
}
}
return dimension;
}
@Override
protected IIOMetadataNode getStandardTransparencyNode() {
// Consult ExtraSamples
Entry extraSamplesTag = ifd.getEntryById(TIFF.TAG_EXTRA_SAMPLES);
if (extraSamplesTag != null) {
int extraSamplesValue = (extraSamplesTag.getValue() instanceof Number)
? getValueAsInt(extraSamplesTag)
: ((Number) Array.get(extraSamplesTag.getValue(), 0)).intValue();
// Other values exists, these are not alpha
if (extraSamplesValue == TIFFBaseline.EXTRASAMPLE_ASSOCIATED_ALPHA || extraSamplesValue == TIFFBaseline.EXTRASAMPLE_UNASSOCIATED_ALPHA) {
IIOMetadataNode transparency = new IIOMetadataNode("Transparency");
IIOMetadataNode alpha = new IIOMetadataNode("Alpha");
transparency.appendChild(alpha);
alpha.setAttribute("value", extraSamplesValue == TIFFBaseline.EXTRASAMPLE_ASSOCIATED_ALPHA
? "premultiplied"
: "nonpremultiplied");
return transparency;
}
}
return null;
}
@Override
protected IIOMetadataNode getStandardDocumentNode() {
IIOMetadataNode document = new IIOMetadataNode("Document");
// FormatVersion, hardcoded to 6.0 (the current TIFF specification version),
// as there's no format information in the TIFF structure.
IIOMetadataNode formatVersion = new IIOMetadataNode("FormatVersion");
document.appendChild(formatVersion);
formatVersion.setAttribute("value", "6.0");
// SubImageInterpretation from SubImageInterpretation (if applicable)
Entry subFileTypeTag = ifd.getEntryById(TIFF.TAG_SUBFILE_TYPE);
if (subFileTypeTag != null) {
// NOTE: The JAI metadata is somewhat broken here, as these are bit flags, not values...
String value = null;
int subFileTypeValue = getValueAsInt(subFileTypeTag);
if ((subFileTypeValue & TIFFBaseline.FILETYPE_MASK) != 0) {
value = "TransparencyMask";
}
else if ((subFileTypeValue & TIFFBaseline.FILETYPE_REDUCEDIMAGE) != 0) {
value = "ReducedResolution";
}
else if ((subFileTypeValue & TIFFBaseline.FILETYPE_PAGE) != 0) {
value = "SinglePage";
}
// If no flag is set, we don't know...
if (value != null) {
IIOMetadataNode subImageInterpretation = new IIOMetadataNode("SubImageInterpretation");
document.appendChild(subImageInterpretation);
subImageInterpretation.setAttribute("value", value);
}
}
// ImageCreationTime from DateTime
Entry dateTimeTag = ifd.getEntryById(TIFF.TAG_DATE_TIME);
if (dateTimeTag != null) {
DateFormat format = new SimpleDateFormat("yyyy:MM:dd hh:mm:ss");
try {
IIOMetadataNode imageCreationTime = new IIOMetadataNode("ImageCreationTime");
document.appendChild(imageCreationTime);
Calendar date = Calendar.getInstance();
date.setTime(format.parse(dateTimeTag.getValueAsString()));
imageCreationTime.setAttribute("year", String.valueOf(date.get(Calendar.YEAR)));
imageCreationTime.setAttribute("month", String.valueOf(date.get(Calendar.MONTH) + 1));
imageCreationTime.setAttribute("day", String.valueOf(date.get(Calendar.DAY_OF_MONTH)));
imageCreationTime.setAttribute("hour", String.valueOf(date.get(Calendar.HOUR_OF_DAY)));
imageCreationTime.setAttribute("minute", String.valueOf(date.get(Calendar.MINUTE)));
imageCreationTime.setAttribute("second", String.valueOf(date.get(Calendar.SECOND)));
}
catch (ParseException ignore) {
// Bad format...
}
}
return document;
}
@Override
protected IIOMetadataNode getStandardTextNode() {
IIOMetadataNode text = new IIOMetadataNode("Text");
// DocumentName, ImageDescription, Make, Model, PageName, Software, Artist, HostComputer, InkNames, Copyright:
// /Text/TextEntry@keyword = field name, /Text/TextEntry@value = field value.
addTextEntryIfPresent(text, TIFF.TAG_DOCUMENT_NAME);
addTextEntryIfPresent(text, TIFF.TAG_IMAGE_DESCRIPTION);
addTextEntryIfPresent(text, TIFF.TAG_MAKE);
addTextEntryIfPresent(text, TIFF.TAG_MODEL);
addTextEntryIfPresent(text, TIFF.TAG_PAGE_NAME);
addTextEntryIfPresent(text, TIFF.TAG_SOFTWARE);
addTextEntryIfPresent(text, TIFF.TAG_ARTIST);
addTextEntryIfPresent(text, TIFF.TAG_HOST_COMPUTER);
addTextEntryIfPresent(text, TIFF.TAG_INK_NAMES);
addTextEntryIfPresent(text, TIFF.TAG_COPYRIGHT);
return text.hasChildNodes() ? text : null;
}
private void addTextEntryIfPresent(final IIOMetadataNode text, final int tag) {
Entry entry = ifd.getEntryById(tag);
if (entry != null) {
IIOMetadataNode node = new IIOMetadataNode("TextEntry");
text.appendChild(node);
node.setAttribute("keyword", entry.getFieldName());
node.setAttribute("value", entry.getValueAsString());
}
}
@Override
protected IIOMetadataNode getStandardTileNode() {
// TODO! Woot?! This node is not documented in the DTD (although the page mentions a "tile" node)..?
// See http://docs.oracle.com/javase/7/docs/api/javax/imageio/metadata/doc-files/standard_metadata.html
// See http://stackoverflow.com/questions/30910719/javax-imageio-1-0-standard-plug-in-neutral-metadata-format-tiling-information
return super.getStandardTileNode();
}
/// Mutation
@Override
public boolean isReadOnly() {
return false;
}
public void setFromTree(final String formatName, final Node root) throws IIOInvalidTreeException {
// Standard validation
super.setFromTree(formatName, root);
// Set by "merging" with empty map
LinkedHashMap entries = new LinkedHashMap<>();
mergeEntries(formatName, root, entries);
// TODO: Consistency validation?
// Finally create a new IFD from merged values
ifd = new IFD(entries.values());
}
@Override
public void mergeTree(final String formatName, final Node root) throws IIOInvalidTreeException {
// Standard validation
super.mergeTree(formatName, root);
// Clone entries (shallow clone, as entries themselves are immutable)
LinkedHashMap entries = new LinkedHashMap<>(ifd.size() + 10);
for (Entry entry : ifd) {
entries.put((Integer) entry.getIdentifier(), entry);
}
mergeEntries(formatName, root, entries);
// TODO: Consistency validation?
// Finally create a new IFD from merged values
ifd = new IFD(entries.values());
}
private void mergeEntries(final String formatName, final Node root, final Map entries) throws IIOInvalidTreeException {
// Merge from both native and standard trees
if (getNativeMetadataFormatName().equals(formatName)) {
mergeNativeTree(root, entries);
}
else if (IIOMetadataFormatImpl.standardMetadataFormatName.equals(formatName)) {
mergeStandardTree(root, entries);
}
else {
// Should already be checked for
throw new AssertionError();
}
}
private void mergeStandardTree(final Node root, final Map entries) throws IIOInvalidTreeException {
NodeList nodes = root.getChildNodes();
// Merge selected values from standard tree
for (int i = 0; i < nodes.getLength(); i++) {
Node node = nodes.item(i);
if ("Dimension".equals(node.getNodeName())) {
mergeFromStandardDimensionNode(node, entries);
}
else if ("Document".equals(node.getNodeName())) {
mergeFromStandardDocumentNode(node, entries);
}
else if ("Text".equals(node.getNodeName())) {
mergeFromStandardTextNode(node, entries);
}
}
}
private void mergeFromStandardDimensionNode(final Node dimensionNode, final Map entries) {
// Dimension: xRes/yRes
// - If set, set res unit to pixels per cm as this better reflects values?
// - Or, convert to DPI, if we already had values in DPI??
// Also, if we have only aspect, set these values, and use unknown as unit?
// TODO: ImageOrientation => Orientation
NodeList children = dimensionNode.getChildNodes();
Float aspect = null;
Float xRes = null;
Float yRes = null;
for (int i = 0; i < children.getLength(); i++) {
Node child = children.item(i);
String nodeName = child.getNodeName();
if ("PixelAspectRatio".equals(nodeName)) {
aspect = Float.parseFloat(getAttribute(child, "value"));
}
else if ("HorizontalPixelSize".equals(nodeName)) {
xRes = Float.parseFloat(getAttribute(child, "value"));
}
else if ("VerticalPixelSize".equals(nodeName)) {
yRes = Float.parseFloat(getAttribute(child, "value"));
}
}
// If we have one size compute the other
if (xRes == null && yRes != null) {
xRes = yRes * (aspect != null ? aspect : 1f);
}
else if (yRes == null && xRes != null) {
yRes = xRes / (aspect != null ? aspect : 1f);
}
// If we have resolution
if (xRes != null && yRes != null) {
// If old unit was DPI, convert values and keep DPI, otherwise use PPCM
Entry resUnitEntry = entries.get(TIFF.TAG_RESOLUTION_UNIT);
int resUnitValue = resUnitEntry != null && resUnitEntry.getValue() != null
&& ((Number) resUnitEntry.getValue()).intValue() == TIFFBaseline.RESOLUTION_UNIT_DPI
? TIFFBaseline.RESOLUTION_UNIT_DPI
: TIFFBaseline.RESOLUTION_UNIT_CENTIMETER;
// Units from standard format are pixels per mm, convert to cm or inches
float scale = resUnitValue == TIFFBaseline.RESOLUTION_UNIT_CENTIMETER ? 10 : 25.4f;
int x = Math.round(xRes * scale * RATIONAL_SCALE_FACTOR);
int y = Math.round(yRes * scale * RATIONAL_SCALE_FACTOR);
entries.put(TIFF.TAG_X_RESOLUTION, new TIFFEntry(TIFF.TAG_X_RESOLUTION, new Rational(x, RATIONAL_SCALE_FACTOR)));
entries.put(TIFF.TAG_Y_RESOLUTION, new TIFFEntry(TIFF.TAG_Y_RESOLUTION, new Rational(y, RATIONAL_SCALE_FACTOR)));
entries.put(TIFF.TAG_RESOLUTION_UNIT,
new TIFFEntry(TIFF.TAG_RESOLUTION_UNIT, TIFF.TYPE_SHORT, resUnitValue));
}
else if (aspect != null) {
if (aspect >= 1) {
int v = Math.round(aspect * RATIONAL_SCALE_FACTOR);
entries.put(TIFF.TAG_X_RESOLUTION, new TIFFEntry(TIFF.TAG_X_RESOLUTION, new Rational(v, RATIONAL_SCALE_FACTOR)));
entries.put(TIFF.TAG_Y_RESOLUTION, new TIFFEntry(TIFF.TAG_Y_RESOLUTION, new Rational(1)));
}
else {
int v = Math.round(RATIONAL_SCALE_FACTOR / aspect);
entries.put(TIFF.TAG_X_RESOLUTION, new TIFFEntry(TIFF.TAG_X_RESOLUTION, new Rational(1)));
entries.put(TIFF.TAG_Y_RESOLUTION, new TIFFEntry(TIFF.TAG_Y_RESOLUTION, new Rational(v, RATIONAL_SCALE_FACTOR)));
}
entries.put(TIFF.TAG_RESOLUTION_UNIT,
new TIFFEntry(TIFF.TAG_RESOLUTION_UNIT, TIFF.TYPE_SHORT, TIFFBaseline.RESOLUTION_UNIT_NONE));
}
// Else give up...
}
private void mergeFromStandardDocumentNode(final Node documentNode, final Map entries) {
// Document: SubfileType, CreationDate
NodeList children = documentNode.getChildNodes();
for (int i = 0; i < children.getLength(); i++) {
Node child = children.item(i);
String nodeName = child.getNodeName();
if ("SubimageInterpretation".equals(nodeName)) {
// TODO: SubFileType
}
else if ("ImageCreationTime".equals(nodeName)) {
// TODO: CreationDate
}
}
}
private void mergeFromStandardTextNode(final Node textNode, final Map entries) throws IIOInvalidTreeException {
NodeList textEntries = textNode.getChildNodes();
for (int i = 0; i < textEntries.getLength(); i++) {
Node textEntry = textEntries.item(i);
if (!"TextEntry".equals(textEntry.getNodeName())) {
throw new IIOInvalidTreeException("Text node should only contain TextEntry nodes", textNode);
}
String keyword = getAttribute(textEntry, "keyword");
String value = getAttribute(textEntry, "value");
// DocumentName, ImageDescription, Make, Model, PageName,
// Software, Artist, HostComputer, InkNames, Copyright
if (value != null && !value.isEmpty() && keyword != null) {
// We do all comparisons in lower case, for compatibility
keyword = keyword.toLowerCase();
TIFFEntry entry;
if ("documentname".equals(keyword)) {
entry = new TIFFEntry(TIFF.TAG_DOCUMENT_NAME, TIFF.TYPE_ASCII, value);
}
else if ("imagedescription".equals(keyword)) {
entry = new TIFFEntry(TIFF.TAG_IMAGE_DESCRIPTION, TIFF.TYPE_ASCII, value);
}
else if ("make".equals(keyword)) {
entry = new TIFFEntry(TIFF.TAG_MAKE, TIFF.TYPE_ASCII, value);
}
else if ("model".equals(keyword)) {
entry = new TIFFEntry(TIFF.TAG_MODEL, TIFF.TYPE_ASCII, value);
}
else if ("pagename".equals(keyword)) {
entry = new TIFFEntry(TIFF.TAG_PAGE_NAME, TIFF.TYPE_ASCII, value);
}
else if ("software".equals(keyword)) {
entry = new TIFFEntry(TIFF.TAG_SOFTWARE, TIFF.TYPE_ASCII, value);
}
else if ("artist".equals(keyword)) {
entry = new TIFFEntry(TIFF.TAG_ARTIST, TIFF.TYPE_ASCII, value);
}
else if ("hostcomputer".equals(keyword)) {
entry = new TIFFEntry(TIFF.TAG_HOST_COMPUTER, TIFF.TYPE_ASCII, value);
}
else if ("inknames".equals(keyword)) {
entry = new TIFFEntry(TIFF.TAG_INK_NAMES, TIFF.TYPE_ASCII, value);
}
else if ("copyright".equals(keyword)) {
entry = new TIFFEntry(TIFF.TAG_COPYRIGHT, TIFF.TYPE_ASCII, value);
}
else {
continue;
}
entries.put((Integer) entry.getIdentifier(), entry);
}
}
}
private void mergeNativeTree(final Node root, final Map entries) throws IIOInvalidTreeException {
Directory ifd = toIFD(root.getFirstChild());
// Merge (overwrite) entries with entries from IFD
for (Entry entry : ifd) {
entries.put((Integer) entry.getIdentifier(), entry);
}
}
private Directory toIFD(final Node ifdNode) throws IIOInvalidTreeException {
if (ifdNode == null || !ifdNode.getNodeName().equals("TIFFIFD")) {
throw new IIOInvalidTreeException("Expected \"TIFFIFD\" node", ifdNode);
}
NodeList nodes = ifdNode.getChildNodes();
final int size = nodes.getLength();
List entries = new ArrayList<>(size);
for (int i = 0; i < size; i++) {
entries.add(toEntry(nodes.item(i)));
}
return new IFD(entries);
}
private Entry toEntry(final Node node) throws IIOInvalidTreeException {
String name = node.getNodeName();
if (name.equals("TIFFIFD")) {
int tag = Integer.parseInt(getAttribute(node, "parentTagNumber"));
Directory subIFD = toIFD(node);
return new TIFFEntry(tag, TIFF.TYPE_IFD, subIFD);
}
else if (name.equals("TIFFField")) {
int tag = Integer.parseInt(getAttribute(node, "number"));
short type = getTIFFType(node);
Object value = getValue(node, type);
return value != null ? new TIFFEntry(tag, type, value) : null;
}
else {
throw new IIOInvalidTreeException("Expected \"TIFFIFD\" or \"TIFFField\" node: " + name, node);
}
}
private short getTIFFType(final Node node) throws IIOInvalidTreeException {
Node containerNode = node.getFirstChild();
if (containerNode == null) {
throw new IIOInvalidTreeException("Missing value wrapper node", node);
}
String nodeName = containerNode.getNodeName();
if (!nodeName.startsWith("TIFF")) {
throw new IIOInvalidTreeException("Unexpected value wrapper node, expected type", containerNode);
}
String typeName = nodeName.substring(4);
if (typeName.equals("Undefined")) {
return TIFF.TYPE_UNDEFINED;
}
typeName = typeName.substring(0, typeName.length() - 1).toUpperCase();
for (int i = 1; i < TIFF.TYPE_NAMES.length; i++) {
if (typeName.equals(TIFF.TYPE_NAMES[i])) {
return (short) i;
}
}
throw new IIOInvalidTreeException("Unknown TIFF type: " + typeName, containerNode);
}
private Object getValue(final Node node, final short type) throws IIOInvalidTreeException {
Node child = node.getFirstChild();
if (child != null) {
String typeName = child.getNodeName();
if (type == TIFF.TYPE_UNDEFINED) {
String values = getAttribute(child, "value");
String[] vals = values.split(",\\s?");
byte[] bytes = new byte[vals.length];
for (int i = 0; i < vals.length; i++) {
bytes[i] = Byte.parseByte(vals[i]);
}
return bytes;
}
else {
NodeList valueNodes = child.getChildNodes();
// Create array for each type
int count = valueNodes.getLength();
Object value = createArrayForType(type, count);
// Parse each value
for (int i = 0; i < count; i++) {
Node valueNode = valueNodes.item(i);
if (!typeName.startsWith(valueNode.getNodeName())) {
throw new IIOInvalidTreeException("Value node does not match container node", child);
}
String stringValue = getAttribute(valueNode, "value");
// NOTE: The reason for parsing "wider" type, is to allow for unsigned values
switch (type) {
case TIFF.TYPE_BYTE:
case TIFF.TYPE_SBYTE:
((byte[]) value)[i] = (byte) Short.parseShort(stringValue);
break;
case TIFF.TYPE_ASCII:
((String[]) value)[i] = stringValue;
break;
case TIFF.TYPE_SHORT:
case TIFF.TYPE_SSHORT:
((short[]) value)[i] = (short) Integer.parseInt(stringValue);
break;
case TIFF.TYPE_LONG:
case TIFF.TYPE_SLONG:
((int[]) value)[i] = (int) Long.parseLong(stringValue);
break;
case TIFF.TYPE_RATIONAL:
case TIFF.TYPE_SRATIONAL:
String[] numDenom = stringValue.split("/");
((Rational[]) value)[i] = numDenom.length > 1
? new Rational(Long.parseLong(numDenom[0]), Long.parseLong(numDenom[1]))
: new Rational(Long.parseLong(numDenom[0]));
break;
case TIFF.TYPE_FLOAT:
((float[]) value)[i] = Float.parseFloat(stringValue);
break;
case TIFF.TYPE_DOUBLE:
((double[]) value)[i] = Double.parseDouble(stringValue);
break;
default:
throw new AssertionError("Unsupported TIFF type: " + type);
}
}
// Normalize value
if (count == 0) {
return null;
}
if (count == 1) {
return Array.get(value, 0);
}
return value;
}
}
throw new IIOInvalidTreeException("Empty TIFField node", node);
}
private Object createArrayForType(final short type, final int length) {
switch (type) {
case TIFF.TYPE_ASCII:
return new String[length];
case TIFF.TYPE_BYTE:
case TIFF.TYPE_SBYTE:
case TIFF.TYPE_UNDEFINED: // Not used here, but for completeness
return new byte[length];
case TIFF.TYPE_SHORT:
case TIFF.TYPE_SSHORT:
return new short[length];
case TIFF.TYPE_LONG:
case TIFF.TYPE_SLONG:
return new int[length];
case TIFF.TYPE_IFD:
return new long[length];
case TIFF.TYPE_RATIONAL:
case TIFF.TYPE_SRATIONAL:
return new Rational[length];
case TIFF.TYPE_FLOAT:
return new float[length];
case TIFF.TYPE_DOUBLE:
return new double[length];
default:
throw new AssertionError("Unsupported TIFF type: " + type);
}
}
private String getAttribute(final Node node, final String attribute) {
return node instanceof Element ? ((Element) node).getAttribute(attribute) : null;
}
@Override
public void reset() {
super.reset();
ifd = original;
}
Directory getIFD() {
return ifd;
}
/**
* Returns an Entry which contains the data of the requested TIFF field.
*
* @param tagNumber Tag number of the TIFF field.
*
* @return the TIFF field, or null.
*/
public Entry getTIFFField(final int tagNumber) {
return ifd.getEntryById(tagNumber);
}
}
