@Override
public Query apply(Function input, Context context) throws IOException {
List<Symbol> arguments = input.arguments();
assert arguments.size() == 4 : "invalid number of arguments";
assert Symbol.isLiteral(arguments.get(0), DataTypes.OBJECT);
assert Symbol.isLiteral(arguments.get(1), DataTypes.STRING);
assert Symbol.isLiteral(arguments.get(2), DataTypes.STRING);
assert Symbol.isLiteral(arguments.get(3), DataTypes.OBJECT);
@SuppressWarnings("unchecked")
Map<String, Object> fields = (Map) ((Literal) arguments.get(0)).value();
BytesRef queryString = (BytesRef) ((Literal) arguments.get(1)).value();
BytesRef matchType = (BytesRef) ((Literal) arguments.get(2)).value();
Map options = (Map) ((Literal) arguments.get(3)).value();
checkArgument(queryString != null, "cannot use NULL as query term in match predicate");
MatchQueryBuilder queryBuilder;
if (fields.size() == 1) {
queryBuilder =
new MatchQueryBuilder(context.mapperService, context.indexCache, matchType, options);
} else {
queryBuilder =
new MultiMatchQueryBuilder(
context.mapperService, context.indexCache, matchType, options);
}
return queryBuilder.query(fields, queryString);
}
@Nullable
public Float minScore() {
Object score = filteredFieldValues.get("_score");
if (score == null) {
return null;
}
return ((Number) score).floatValue();
}