private boolean isSampleInvalid(Band firstNdviBand, Band secondNdviBand, int x, int y) {
return !firstNdviBand.isPixelValid(x, y) && !secondNdviBand.isPixelValid(x, y);
}
@Override
public void computeTile(Band targetBand, Tile targetTile, ProgressMonitor pm)
throws OperatorException {
final Rectangle targetRectangle = targetTile.getRectangle();
final String name = targetBand.getName();
final String currentMonth = name.substring(TARGET_BAND_PREFIX.length(), name.length());
final List<Product> currentMonthDataProducts = halfmonthlyDataProductsMap.get(currentMonth);
List<Product> currentMonthFlagProducts;
if (currentMonthDataProducts.size() != 2) {
return;
}
final Band firstNdviBand = currentMonthDataProducts.get(0).getBand("band_1");
final Tile firstNdviTile = getSourceTile(firstNdviBand, targetRectangle);
final Band secondNdviBand = currentMonthDataProducts.get(1).getBand("band_1");
final Tile secondNdviTile = getSourceTile(secondNdviBand, targetRectangle);
Band firstNdviFlagBand;
Tile firstNdviFlagTile = null;
Band secondNdviFlagBand;
Tile secondNdviFlagTile = null;
if (writeFlags) {
currentMonthFlagProducts = halfmonthlyFlagProductsMap.get(currentMonth);
if (currentMonthFlagProducts.size() != 2) {
return;
}
firstNdviFlagBand = currentMonthFlagProducts.get(0).getBand("band_1");
firstNdviFlagTile = getSourceTile(firstNdviFlagBand, targetRectangle);
secondNdviFlagBand = currentMonthFlagProducts.get(1).getBand("band_1");
secondNdviFlagTile = getSourceTile(secondNdviFlagBand, targetRectangle);
}
for (int y = targetRectangle.y; y < targetRectangle.y + targetRectangle.height; y++) {
checkForCancellation();
for (int x = targetRectangle.x; x < targetRectangle.x + targetRectangle.width; x++) {
final boolean isSampleInvalid = isSampleInvalid(firstNdviBand, secondNdviBand, x, y);
final boolean isSampleMissing = isSampleMissing(firstNdviTile, secondNdviTile, x, y);
if (!isSampleInvalid && !isSampleMissing) {
final int firstNdvi = firstNdviTile.getSampleInt(x, y);
final int secondNdvi = secondNdviTile.getSampleInt(x, y);
if (firstNdviBand.isPixelValid(x, y) && secondNdviBand.isPixelValid(x, y)) {
final int maxNdvi = Math.max(firstNdvi, secondNdvi);
if (writeFlags) {
if (firstNdvi >= secondNdvi) {
final int firstNdviFlag = firstNdviFlagTile.getSampleInt(x, y);
targetTile.setSample(x, y, firstNdviFlag);
} else {
final int secondNdviFlag = secondNdviFlagTile.getSampleInt(x, y);
targetTile.setSample(x, y, secondNdviFlag);
}
} else {
targetTile.setSample(x, y, maxNdvi);
}
} else if (!firstNdviBand.isPixelValid(x, y)) {
if (writeFlags) {
final int firstNdviFlag = firstNdviFlagTile.getSampleInt(x, y);
targetTile.setSample(x, y, firstNdviFlag);
} else {
targetTile.setSample(x, y, firstNdvi);
}
} else if (!secondNdviBand.isPixelValid(x, y)) {
if (writeFlags) {
final int secondNdviFlag = secondNdviFlagTile.getSampleInt(x, y);
targetTile.setSample(x, y, secondNdviFlag);
} else {
targetTile.setSample(x, y, secondNdvi);
}
}
} else {
targetTile.setSample(x, y, Constants.NDVI_INVALID_VALUE);
}
}
}
}