private void setSceneRasterStartAndStopTime(Product product) {
final Product sourceProduct = getSourceProduct();
final ProductData.UTC startTime = sourceProduct.getStartTime();
final ProductData.UTC stopTime = sourceProduct.getEndTime();
final ProductSubsetDef subsetDef = getSubsetDef();
if (startTime != null
&& stopTime != null
&& subsetDef != null
&& subsetDef.getRegion() != null) {
final double height = sourceProduct.getSceneRasterHeight();
final Rectangle region = subsetDef.getRegion();
final double regionY = region.getY();
final double regionHeight = region.getHeight();
final double dStart = startTime.getMJD();
final double dStop = stopTime.getMJD();
final double vPerLine = (dStop - dStart) / (height - 1);
final double newStart = vPerLine * regionY + dStart;
final double newStop = vPerLine * (regionHeight - 1) + newStart;
product.setStartTime(new ProductData.UTC(newStart));
product.setEndTime(new ProductData.UTC(newStop));
} else {
product.setStartTime(startTime);
product.setEndTime(stopTime);
}
}
private static void setSubsetSRGRCoefficients(
final Product sourceProduct,
final Product targetProduct,
final ProductSubsetDef subsetDef,
final MetadataElement absRoot,
final boolean nearRangeOnLeft) {
final MetadataElement SRGRCoefficientsElem = absRoot.getElement("SRGR_Coefficients");
if (SRGRCoefficientsElem != null) {
final double rangeSpacing = absRoot.getAttributeDouble("RANGE_SPACING", 0);
final double colIndex = subsetDef.getRegion() == null ? 0 : subsetDef.getRegion().getX();
for (MetadataElement srgrList : SRGRCoefficientsElem.getElements()) {
final double grO = srgrList.getAttributeDouble("ground_range_origin", 0);
double ground_range_origin_subset;
if (nearRangeOnLeft) {
ground_range_origin_subset = grO + colIndex * rangeSpacing;
} else {
final double colIndexFromRight =
sourceProduct.getSceneRasterWidth() - colIndex - targetProduct.getSceneRasterWidth();
ground_range_origin_subset = grO + colIndexFromRight * rangeSpacing;
}
srgrList.setAttributeDouble("ground_range_origin", ground_range_origin_subset);
}
}
}
private boolean isFullScene(ProductSubsetDef subsetDef) {
if (subsetDef == null) {
return true;
}
final Rectangle sourceRegion =
new Rectangle(0, 0, sourceProduct.getSceneRasterWidth(), getSceneRasterHeight());
return subsetDef.getRegion() == null
|| subsetDef.getRegion().equals(sourceRegion)
&& subsetDef.getSubSamplingX() == 1
&& subsetDef.getSubSamplingY() == 1;
}
private void addSubsetInfoMetadata(Product product) {
if (getSubsetDef() != null) {
ProductSubsetDef subsetDef = getSubsetDef();
Product sourceProduct = getSourceProduct();
String nameSubsetinfo = "SubsetInfo";
MetadataElement subsetElem = new MetadataElement(nameSubsetinfo);
addAttribString("SourceProduct.name", sourceProduct.getName(), subsetElem);
subsetElem.setAttributeInt("SubSampling.x", subsetDef.getSubSamplingX());
subsetElem.setAttributeInt("SubSampling.y", subsetDef.getSubSamplingY());
if (subsetDef.getRegion() != null) {
Rectangle region = subsetDef.getRegion();
subsetElem.setAttributeInt("SubRegion.x", region.x);
subsetElem.setAttributeInt("SubRegion.y", region.y);
subsetElem.setAttributeInt("SubRegion.width", region.width);
subsetElem.setAttributeInt("SubRegion.height", region.height);
}
String[] nodeNames = subsetDef.getNodeNames();
if (nodeNames != null) {
for (int i = 0; i < nodeNames.length; i++) {
addAttribString("ProductNodeName." + (i + 1), nodeNames[i], subsetElem);
}
}
ProductUtils.addElementToHistory(product, subsetElem);
}
}
private static void updateMetadata(
final Product sourceProduct, final Product targetProduct, ProductSubsetDef subsetDef)
throws IOException {
try {
final MetadataElement root = targetProduct.getMetadataRoot();
if (root == null) return;
final MetadataElement absRoot = root.getElement("Abstracted_Metadata");
if (absRoot == null) return;
boolean nearRangeOnLeft = isNearRangeOnLeft(targetProduct);
final MetadataAttribute firstLineTime = absRoot.getAttribute("first_line_time");
if (firstLineTime != null) {
final ProductData.UTC startTime = targetProduct.getStartTime();
if (startTime != null) firstLineTime.getData().setElems(startTime.getArray());
}
final MetadataAttribute lastLineTime = absRoot.getAttribute("last_line_time");
if (lastLineTime != null) {
final ProductData.UTC endTime = targetProduct.getEndTime();
if (endTime != null) lastLineTime.getData().setElems(endTime.getArray());
}
final MetadataAttribute totalSize = absRoot.getAttribute("total_size");
if (totalSize != null) totalSize.getData().setElemUInt(targetProduct.getRawStorageSize());
if (nearRangeOnLeft) {
setLatLongMetadata(targetProduct, absRoot, "first_near_lat", "first_near_long", 0.5f, 0.5f);
setLatLongMetadata(
targetProduct,
absRoot,
"first_far_lat",
"first_far_long",
targetProduct.getSceneRasterWidth() - 1 + 0.5f,
0.5f);
setLatLongMetadata(
targetProduct,
absRoot,
"last_near_lat",
"last_near_long",
0.5f,
targetProduct.getSceneRasterHeight() - 1 + 0.5f);
setLatLongMetadata(
targetProduct,
absRoot,
"last_far_lat",
"last_far_long",
targetProduct.getSceneRasterWidth() - 1 + 0.5f,
targetProduct.getSceneRasterHeight() - 1 + 0.5f);
} else {
setLatLongMetadata(
targetProduct,
absRoot,
"first_near_lat",
"first_near_long",
targetProduct.getSceneRasterWidth() - 1 + 0.5f,
0.5f);
setLatLongMetadata(targetProduct, absRoot, "first_far_lat", "first_far_long", 0.5f, 0.5f);
setLatLongMetadata(
targetProduct,
absRoot,
"last_near_lat",
"last_near_long",
targetProduct.getSceneRasterWidth() - 1 + 0.5f,
targetProduct.getSceneRasterHeight() - 1 + 0.5f);
setLatLongMetadata(
targetProduct,
absRoot,
"last_far_lat",
"last_far_long",
0.5f,
targetProduct.getSceneRasterHeight() - 1 + 0.5f);
}
final MetadataAttribute height = absRoot.getAttribute("num_output_lines");
if (height != null) height.getData().setElemUInt(targetProduct.getSceneRasterHeight());
final MetadataAttribute width = absRoot.getAttribute("num_samples_per_line");
if (width != null) width.getData().setElemUInt(targetProduct.getSceneRasterWidth());
final MetadataAttribute offsetX = absRoot.getAttribute("subset_offset_x");
if (offsetX != null && subsetDef.getRegion() != null)
offsetX.getData().setElemUInt(subsetDef.getRegion().x);
final MetadataAttribute offsetY = absRoot.getAttribute("subset_offset_y");
if (offsetY != null && subsetDef.getRegion() != null)
offsetY.getData().setElemUInt(subsetDef.getRegion().y);
final MetadataAttribute slantRange = absRoot.getAttribute("slant_range_to_first_pixel");
if (slantRange != null) {
final TiePointGrid srTPG = targetProduct.getTiePointGrid("slant_range_time");
if (srTPG != null) {
final double slantRangeTime;
if (nearRangeOnLeft) {
slantRangeTime = srTPG.getPixelDouble(0, 0) / 1000000000.0; // ns to s
} else {
slantRangeTime =
srTPG.getPixelDouble(targetProduct.getSceneRasterWidth() - 1, 0)
/ 1000000000.0; // ns to s
}
final double halfLightSpeed = 299792458.0 / 2.0;
final double slantRangeDist = slantRangeTime * halfLightSpeed;
slantRange.getData().setElemDouble(slantRangeDist);
}
}
setSubsetSRGRCoefficients(sourceProduct, targetProduct, subsetDef, absRoot, nearRangeOnLeft);
} catch (Exception e) {
throw new IOException(e);
}
}