private void readTiePointGrids(Document jDomDocument) throws IOException {
final String[] tiePointGridNames = product.getTiePointGridNames();
for (String tiePointGridName : tiePointGridNames) {
final TiePointGrid tiePointGrid = product.getTiePointGrid(tiePointGridName);
String dataFile =
DimapProductHelpers.getTiePointDataFile(jDomDocument, tiePointGrid.getName());
final int dataType =
DimapProductHelpers.getTiePointDataType(
jDomDocument.getRootElement(), tiePointGrid.getName());
dataFile = FileUtils.exchangeExtension(dataFile, DimapProductConstants.IMAGE_FILE_EXTENSION);
FileImageInputStream inputStream = null;
try {
inputStream = new FileImageInputStream(new File(inputDir, dataFile));
final float[] data = ((float[]) tiePointGrid.getData().getElems());
inputStream.seek(0);
if (dataType == ProductData.TYPE_FLOAT32) {
inputStream.readFully(data, 0, data.length);
} else {
final double[] doubles = new double[data.length];
inputStream.readFully(doubles, 0, doubles.length);
int i = 0;
for (double d : doubles) {
data[i++] = (float) d;
}
}
inputStream.close();
inputStream = null;
// See if we have a -180...+180 or a 0...360 degree discontinuity
if (tiePointGrid.getDiscontinuity() != TiePointGrid.DISCONT_NONE) {
tiePointGrid.setDiscontinuity(TiePointGrid.getDiscontinuity(data));
}
} catch (Exception e) {
throw new IOException(
MessageFormat.format(
"I/O error while reading tie-point grid ''{0}''.", tiePointGridName),
e);
} finally {
if (inputStream != null) {
inputStream.close();
}
}
}
}