io.questdb.griffin.engine.functions.math.IPv4VarcharNetmaskFunctionFactory Maven / Gradle / Ivy

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 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2024 QuestDB
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 *  http://www.apache.org/licenses/LICENSE-2.0
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package io.questdb.griffin.engine.functions.math;

import io.questdb.cairo.CairoConfiguration;
import io.questdb.cairo.sql.Function;
import io.questdb.cairo.sql.Record;
import io.questdb.cairo.sql.SymbolTableSource;
import io.questdb.griffin.FunctionFactory;
import io.questdb.griffin.PlanSink;
import io.questdb.griffin.SqlException;
import io.questdb.griffin.SqlExecutionContext;
import io.questdb.griffin.engine.functions.IPv4Function;
import io.questdb.griffin.engine.functions.UnaryFunction;
import io.questdb.griffin.engine.functions.constants.IPv4Constant;
import io.questdb.std.IntList;
import io.questdb.std.Numbers;
import io.questdb.std.ObjList;
import io.questdb.std.str.Utf8Sequence;

public class IPv4VarcharNetmaskFunctionFactory implements FunctionFactory {
    @Override
    public String getSignature() {
        return "netmask(Ø)";
    }

    @Override
    public Function newInstance(
            int position,
            ObjList args,
            IntList argPositions,
            CairoConfiguration configuration,
            SqlExecutionContext sqlExecutionContext
    ) {
        final Function varcharFunc = args.getQuick(0);
        if (varcharFunc.isConstant()) {
            final CharSequence str = varcharFunc.getStrA(null);
            if (str == null) {
                return IPv4Constant.NULL;
            }
            final int val = Numbers.getIPv4Netmask(str);
            return val == Numbers.BAD_NETMASK ? IPv4Constant.NULL : IPv4Constant.newInstance(val);
        }
        return new Func(varcharFunc);
    }

    private static class Func extends IPv4Function implements UnaryFunction {
        private final Function arg;

        public Func(Function arg) {
            this.arg = arg;
        }

        @Override
        public Function getArg() {
            return arg;
        }

        @Override
        public int getIPv4(Record rec) {
            final Utf8Sequence seq = arg.getVarcharA(rec);
            if (seq == null) {
                return Numbers.IPv4_NULL;
            }
            final int val = Numbers.getIPv4Netmask(seq.asAsciiCharSequence());
            return val == Numbers.BAD_NETMASK ? Numbers.IPv4_NULL : val;
        }

        @Override
        public void toPlan(PlanSink sink) {
            sink.val("netmask(").val(arg).val(')');
        }
    }
}