private static LongSet stringToSet(CharSequence values) {
LongSet result = new LongSet();
for (String valueString : DelimitedDataUtils.decode(values, ',')) {
result.add(Long.parseLong(valueString));
}
return result;
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws IOException {
RDFGenerationManager generationManager = getGenerationManager();
Generation generation = generationManager.getCurrentGeneration();
if (generation == null) {
response.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE);
return;
}
InboundSettings inboundSettings = getInboundSettings();
TreeBasedClassifier forest = generation.getForest();
Map<Integer, BiMap<String, Integer>> columnToCategoryNameToIDMapping =
generation.getColumnToCategoryNameToIDMapping();
int totalColumns = getTotalColumns();
for (CharSequence line : CharStreams.readLines(request.getReader())) {
generationManager.append(line);
String[] tokens = DelimitedDataUtils.decode(line);
if (tokens.length != totalColumns) {
response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Wrong column count");
return;
}
Feature target = null;
Feature[] features = new Feature[totalColumns]; // Too big by 1 but makes math easier
try {
for (int col = 0; col < features.length; col++) {
if (col == inboundSettings.getTargetColumn()) {
target = buildFeature(col, tokens[col], columnToCategoryNameToIDMapping);
features[col] = IgnoredFeature.INSTANCE;
} else {
features[col] = buildFeature(col, tokens[col], columnToCategoryNameToIDMapping);
}
}
} catch (IllegalArgumentException iae) {
response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Bad input line");
return;
}
Preconditions.checkNotNull(target);
Example example = new Example(target, features);
forest.update(example);
}
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws IOException {
KMeansGenerationManager generationManager = getGenerationManager();
Generation generation = generationManager.getCurrentGeneration();
if (generation == null) {
response.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE);
return;
}
for (CharSequence line : CharStreams.readLines(request.getReader())) {
generationManager.append(line);
RealVector vec = generation.toVector(DelimitedDataUtils.decode(line));
if (vec == null) {
response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Wrong column count");
return;
}
// TODO update the centers, along the lines of Meyerson et al.
}
}