public static TIFFTag getTag(String tagName, List tagSets) {
Iterator iter = tagSets.iterator();
while (iter.hasNext()) {
TIFFTagSet tagSet = (TIFFTagSet) iter.next();
TIFFTag tag = tagSet.getTag(tagName);
if (tag != null) {
return tag;
}
}
return null;
}
/**
* Returns a <code>TIFFIFD</code> wherein all fields from the <code>BaselineTIFFTagSet</code> are
* copied by value and all other fields copied by reference.
*/
public TIFFIFD getShallowClone() {
// Get the baseline TagSet.
TIFFTagSet baselineTagSet = BaselineTIFFTagSet.getInstance();
// If the baseline TagSet is not included just return.
List tagSetList = getTagSetList();
if (!tagSetList.contains(baselineTagSet)) {
return this;
}
// Create a new object.
TIFFIFD shallowClone = new TIFFIFD(tagSetList, getParentTag());
// Get the tag numbers in the baseline set.
Set baselineTagNumbers = baselineTagSet.getTagNumbers();
// Iterate over the fields in this IFD.
Iterator fields = iterator();
while (fields.hasNext()) {
// Get the next field.
TIFFField field = (TIFFField) fields.next();
// Get its tag number.
Integer tagNumber = new Integer(field.getTagNumber());
// Branch based on membership in baseline set.
TIFFField fieldClone;
if (baselineTagNumbers.contains(tagNumber)) {
// Copy by value.
Object fieldData = field.getData();
int fieldType = field.getType();
try {
switch (fieldType) {
case TIFFTag.TIFF_BYTE:
case TIFFTag.TIFF_SBYTE:
case TIFFTag.TIFF_UNDEFINED:
fieldData = ((byte[]) fieldData).clone();
break;
case TIFFTag.TIFF_ASCII:
fieldData = ((String[]) fieldData).clone();
break;
case TIFFTag.TIFF_SHORT:
fieldData = ((char[]) fieldData).clone();
break;
case TIFFTag.TIFF_LONG:
case TIFFTag.TIFF_IFD_POINTER:
fieldData = ((long[]) fieldData).clone();
break;
case TIFFTag.TIFF_RATIONAL:
fieldData = ((long[][]) fieldData).clone();
break;
case TIFFTag.TIFF_SSHORT:
fieldData = ((short[]) fieldData).clone();
break;
case TIFFTag.TIFF_SLONG:
fieldData = ((int[]) fieldData).clone();
break;
case TIFFTag.TIFF_SRATIONAL:
fieldData = ((int[][]) fieldData).clone();
break;
case TIFFTag.TIFF_FLOAT:
fieldData = ((float[]) fieldData).clone();
break;
case TIFFTag.TIFF_DOUBLE:
fieldData = ((double[]) fieldData).clone();
break;
default:
// Shouldn't happen but do nothing ...
}
} catch (Exception e) {
// Ignore it and copy by reference ...
}
fieldClone =
new TIFFField(
field.getTag(), fieldType,
field.getCount(), fieldData);
} else {
// Copy by reference.
fieldClone = field;
}
// Add the field to the clone.
shallowClone.addTIFFField(fieldClone);
}
// Set positions.
shallowClone.setPositions(
stripOrTileOffsetsPosition, stripOrTileByteCountsPosition, lastPosition);
return shallowClone;
}