@Override
public void rollback() {
// Remove the transformed image from temporary storage
if (target.deleteIfExists()) {
log.trace("Deleted {}", target);
}
}
@Override
public void finalise() {
if (isCleanupSource()) {
// Remove the source images from upload or temporary storage
for (GraphicsFile sourceImage : source) {
// Delete source image
if (sourceImage.deleteIfExists()) {
log.trace("Deleted {}", sourceImage);
}
}
}
if (isCleanupTarget()) {
// Remove the transformed image from temporary storage
if (target.deleteIfExists()) {
log.trace("Deleted {}", target);
}
}
}
@Override
public void execute() throws TaskException {
if (isCheckSource()) {
if (getSource().isEmpty()) {
// During import if no input images then throws exception
throw new TaskException(getDescription(), Constant.ERR_NO_INPUT_IMAGES);
}
} else {
if (getSource().isEmpty()) {
// During export if no input images, still allow transformation task to finish.
// As there is no input images, gdalwarp won't be performed and
// therefore the target image won't exist.
// An example: when timeslice contains no tiles during export.
log.debug("Source is empty; will not transform.");
return;
}
}
// Initialize command parameter list
command = new ArrayList<String>();
command.add("gdalwarp");
// Set the target projection (SRS) when applicable
if (target.getEpsgId() > -1) {
command.add("-t_srs");
command.add("EPSG:" + target.getEpsgId());
} else {
if (target.getSrs() != null && !target.getSrs().isEmpty()) {
command.add("-t_srs");
command.add(target.getSrs());
}
}
// Override the target extents when applicable
if (getExtents() != null) {
command.add("-te");
command.add(Double.toString(getExtents().getXMin()));
command.add(Double.toString(getExtents().getYMin()));
command.add(Double.toString(getExtents().getXMax()));
command.add(Double.toString(getExtents().getYMax()));
} else {
// Target extents
if (getTarget().getBounds() != null) {
command.add("-te");
command.add(Double.toString(getTarget().getBounds().getXMin()));
command.add(Double.toString(getTarget().getBounds().getYMin()));
command.add(Double.toString(getTarget().getBounds().getXMax()));
command.add(Double.toString(getTarget().getBounds().getYMax()));
}
}
// Set the target resolution when applicable
if (getTarget().getResolution() != null) {
command.add("-tr");
command.add(Double.toString(getTarget().getResolution().toDouble()));
command.add(Double.toString(getTarget().getResolution().toDouble()));
}
// Sampling method
command.add("-r");
if (useBilinearInterpolation) command.add("bilinear");
else command.add("near");
// Output format (e.g. netCDF, GTiff)
command.add("-of");
command.add(target.getFormat().toGdalString());
if (datatype != null) {
command.add("-ot");
command.add(datatype.getGdalDataType());
}
// Override srcnodata metadata (or lack thereof)
if (srcnodata != null && !srcnodata.isEmpty()) {
command.add("-srcnodata");
command.add(srcnodata);
}
// Override dstnodata metadata (or lack thereof)
if (dstnodata != null && !dstnodata.isEmpty()) {
command.add("-dstnodata");
command.add(dstnodata);
}
// Add extra options such as Mosaicking options, Memory management options
addExtraOptions(command);
// Creation options (e.g. compression)
for (String co : target.getFormat().getCreationOptions()) {
command.add("-co");
command.add(co);
}
// Input files
boolean sourceExist = false;
for (GraphicsFile gf : source) {
// If graphic file not found, don't add it into gdalwarp sourcefiles
if (!gf.exists()) {
continue;
}
sourceExist = true;
command.add(gf.getFileLocation().toString());
}
// Extra check here to capture missing parameter earlier
if (!sourceExist) {
String strSource = StringUtils.join(source, "\n");
throw new TaskException(getDescription(), "Source file not exist:\n" + strSource);
}
// Output file
command.add(target.getFileLocation().toString());
try {
// If source is raster dataset
// If source is vector dataset
commandUtil.start(command);
} catch (ProcessException | InterruptedException | IOException e) {
throw new TaskException(getDescription(), e);
}
}