private static ImageInfo createIndexedImageInfo(
Product product, TIFFRenderedImage baseImage, Band band) {
final IndexColorModel colorModel = (IndexColorModel) baseImage.getColorModel();
final IndexCoding indexCoding = new IndexCoding("color_map");
final int colorCount = colorModel.getMapSize();
final ColorPaletteDef.Point[] points = new ColorPaletteDef.Point[colorCount];
for (int j = 0; j < colorCount; j++) {
final String name = String.format("I%3d", j);
indexCoding.addIndex(name, j, "");
points[j] = new ColorPaletteDef.Point(j, new Color(colorModel.getRGB(j)), name);
}
product.getIndexCodingGroup().add(indexCoding);
band.setSampleCoding(indexCoding);
return new ImageInfo(new ColorPaletteDef(points, points.length));
}
private void writeIndexCoding(IndexCoding indexCoding, NVariable variable) throws IOException {
CfIndexCodingPart.writeIndexCoding(indexCoding, variable);
final String[] indexNames = indexCoding.getIndexNames();
final StringBuilder descriptions = new StringBuilder();
for (String indexName : indexNames) {
final MetadataAttribute index = indexCoding.getIndex(indexName);
if (index != null) {
final String description = index.getDescription();
if (description != null) {
descriptions.append(description);
}
}
descriptions.append(DESCRIPTION_SEPARATOR);
}
variable.addAttribute(INDEX_DESCRIPTIONS, descriptions.toString().trim());
variable.addAttribute(INDEX_CODING_NAME, indexCoding.getName());
}
private static IndexCoding readIndexCoding(Variable variable, String indexCodingName)
throws ProductIOException {
final IndexCoding indexCoding = CfIndexCodingPart.readIndexCoding(variable, indexCodingName);
if (indexCoding != null) {
final Attribute descriptionsAtt = variable.findAttributeIgnoreCase(INDEX_DESCRIPTIONS);
if (descriptionsAtt != null) {
final String[] descriptions = descriptionsAtt.getStringValue().split(DESCRIPTION_SEPARATOR);
if (indexCoding.getNumAttributes() == descriptions.length) {
for (int i = 0; i < descriptions.length; i++) {
indexCoding.getAttributeAt(i).setDescription(descriptions[i]);
}
}
}
final Attribute nameAtt = variable.findAttributeIgnoreCase(INDEX_CODING_NAME);
if (nameAtt != null) {
indexCoding.setName(nameAtt.getStringValue());
}
}
return indexCoding;
}