@Override
public ValueSource parse(FunctionQParser fp) throws SyntaxError {
String fieldName = fp.parseId();
SchemaField field = fp.getReq().getSchema().getField(fieldName);
FieldType type = field.getType();
if (!(type instanceof MultiPointDocValuesField))
throw new SyntaxError(
"This function only supports fields of type "
+ MultiPointDocValuesField.class.getName()
+ ", not "
+ type.getClass().getName());
MultiPointDocValuesField mpdvFieldType = (MultiPointDocValuesField) type;
double[] parsedLatLong = null;
try {
parsedLatLong = ParseUtils.parseLatitudeLongitude(fp.parseArg());
} catch (InvalidShapeException e) {
throw new SolrException(SolrException.ErrorCode.BAD_REQUEST, e);
}
double y = parsedLatLong[0];
double x = parsedLatLong[1];
SpatialContext ctx = mpdvFieldType.getCtx();
Point point = ctx.makePoint(x, y);
String score = fp.getLocalParams().get("score", "distance");
ValueSource valueSource = new MultiPointDistanceValueSource(fieldName, point, ctx);
if ("distance".equals(score)) {
return valueSource;
} else if ("recipDistance".equals(score)) {
int shift = fp.getLocalParams().getInt("shift", 100);
int maxScore = fp.getLocalParams().getInt("maxScore", 10);
return new ReciprocalFloatFunction(valueSource, maxScore, shift, shift);
} else {
throw new SolrException(
SolrException.ErrorCode.BAD_REQUEST,
"'score' local-param must be one of 'distance', or 'recipDistance'");
}
}
