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TIFF module developed by Harvard University Library
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/**********************************************************************
* Jhove - JSTOR/Harvard Object Validation Environment
* Copyright 2004 by JSTOR and the President and Fellows of Harvard College
**********************************************************************/
package edu.harvard.hul.ois.jhove.module.tiff;
import edu.harvard.hul.ois.jhove.*;
import edu.harvard.hul.ois.jhove.messages.JhoveMessage;
import edu.harvard.hul.ois.jhove.messages.JhoveMessages;
import java.io.*;
import java.text.MessageFormat;
import java.util.*;
/**
* Encapsulation of a GlobalParameters IFD, as defined by
* TIFF/FX, RFC 2301.
*
* @author Gary McGath
*
*/
public class GlobalParametersIFD extends IFD {
/******************************************************************
* PRIVATE INSTANCE FIELDS.
******************************************************************/
private int _profileType;
private int _faxProfile;
private int _codingMethods;
private String _versionYear;
private int _modeNumber;
/** Tiff/FX-specific tags. */
public static final int
PROFILETYPE = 401,
FAXPROFILE = 402,
CODINGMETHODS = 403,
VERSIONYEAR = 404,
MODENUMBER = 405;
private static final String [] PROFILETYPE_L = {
"Unspecified", "Group 3 Fax"
};
private static final String [] FAXPROFILE_L = {
"does not conform to a profile defined for TIFF for facsimile",
"Minimal black & white lossless, Profile S",
"Extended black & white lossless, Profile F",
"Lossless JBIG black & white, Profile J",
"Lossy color and grayscale, Profile C",
"Lossless color and grayscale, Profile L",
"Mixed Raster Content, Profile M"
};
private static final String [] CODINGMETHODS_L = {
"unspecified compression",
"1-dimensional coding, ITU-T Rec. T.4 (MH - Modified Huffman)",
"2-dimensional coding, ITU-T Rec. T.4 (MR - Modified Read)",
"2-dimensional coding, ITU-T Rec. T.6 (MMR - Modified MR)",
"ITU-T Rec. T.82 coding, using ITU-T Rec. T.85 (JBIG)",
"ITU-T Rec. T.81 (Baseline JPEG)",
"ITU-T Rec. T.82 coding, using ITU-T Rec. T.43 (JBIG color)"
};
/******************************************************************
* CLASS CONSTRUCTOR.
******************************************************************/
/** Instantiate a GlobalParametersIFD object.
* @param offset IFD offset
* @param raf TIFF file
* @param bigEndian True if big-endian file
*/
public GlobalParametersIFD (long offset, RepInfo info,
RandomAccessFile raf,
boolean bigEndian)
{
super (offset, info, raf, bigEndian);
_profileType = NULL;
_faxProfile = NULL;
_codingMethods = NULL;
_versionYear = null;
_modeNumber = NULL;
}
/******************************************************************
* PUBLIC INSTANCE METHODS.
******************************************************************/
/** Get the IFD properties. */
@Override
public Property getProperty(boolean rawOutput) {
List entries = new LinkedList ();
if (_profileType != NULL) {
entries.add (addIntegerProperty ("ProfileType", _profileType,
PROFILETYPE_L,
rawOutput));
}
if (_faxProfile != NULL) {
entries.add (addIntegerProperty ("FaxProfile", _faxProfile,
FAXPROFILE_L,
rawOutput));
}
if (_codingMethods != NULL) {
entries.add (addBitmaskProperty ("CodingMethods", _codingMethods,
CODINGMETHODS_L,
rawOutput));
}
if (_versionYear != null) {
entries.add (new Property ("VersionYear",
PropertyType.STRING,
_versionYear));
}
if (_modeNumber != NULL) {
entries.add (new Property ("ModeNumber",
PropertyType.INTEGER,
new Integer (_modeNumber)));
}
return propertyHeader ("GlobalParameterIFD", entries);
}
/** Lookup an IFD tag. */
@Override
public void lookupTag (int tag, int type, long count, long value)
throws TiffException
{
try {
if (tag == PROFILETYPE) {
checkType (tag, type, LONG);
checkCount (tag, count, 1);
_profileType = (int) readLong(type, count, value);
}
else if (tag == FAXPROFILE) {
checkType (tag, type, BYTE);
checkCount (tag, count, 1);
_faxProfile = readByte(type, count, value);
}
else if (tag == CODINGMETHODS) {
checkType (tag, type, LONG);
checkCount (tag, count, 1);
_codingMethods = (int) readLong(type, count, value);
}
else if (tag == VERSIONYEAR) {
checkType (tag, type, BYTE);
checkCount (tag, count, 4);
_versionYear = readASCII(count, value);
}
else if (tag == MODENUMBER) {
checkType (tag, type, BYTE);
checkCount (tag, count, 1);
_modeNumber = readByte(type, count, value);
}
}
catch (IOException e) {
String mess = MessageFormat
.format(MessageConstants.TIFF_HUL_19.getMessage(), Integer.valueOf(tag));
JhoveMessage message = JhoveMessages.getMessageInstance(
MessageConstants.TIFF_HUL_19.getId(), mess);
throw new TiffException(message, value);
}
}
}