io.questdb.griffin.engine.functions.eq.ContainsEqIPv4FunctionFactory Maven / Gradle / Ivy

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package io.questdb.griffin.engine.functions.eq;

import io.questdb.cairo.CairoConfiguration;
import io.questdb.cairo.sql.Function;
import io.questdb.cairo.sql.Record;
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.BooleanFunction;
import io.questdb.griffin.engine.functions.UnaryFunction;
import io.questdb.std.IntList;
import io.questdb.std.NumericException;
import io.questdb.std.ObjList;

import static io.questdb.std.Numbers.*;

// first arg is contained within or equals second arg
public class ContainsEqIPv4FunctionFactory implements FunctionFactory {
    @Override
    public String getSignature() {
        return "<<=(Xs)";
    }

    @Override
    public boolean isBoolean() {
        return true;
    }

    @Override
    public Function newInstance(
            int position,
            ObjList args,
            IntList argPositions,
            CairoConfiguration configuration,
            SqlExecutionContext sqlExecutionContext
    ) throws SqlException {
        return createHalfConstantFunc(args.getQuick(0), args.getQuick(1), argPositions.getQuick(1));
    }

    private Function createHalfConstantFunc(Function varFunc, Function constFunc, int constFuncPos) throws SqlException {
        CharSequence constValue = constFunc.getStr(null);

        if (constValue == null) {
            return new ContainsEqIPv4FunctionFactory.NullCheckFunc(varFunc);
        }

        try {
            long subnetAndNetmask = getIPv4Subnet(constValue);
            int subnet = (int) (subnetAndNetmask >> 32);
            int netmask = (int) (subnetAndNetmask);
            return new ContainsEqIPv4FunctionFactory.ConstCheckFunc(varFunc, subnet & netmask, netmask);
        } catch (NumericException ne) {
            throw SqlException.$(constFuncPos, "invalid argument: ").put(constValue);
        }
    }

    private static class ConstCheckFunc extends BooleanFunction implements UnaryFunction {
        private final Function arg;
        private final int netmask;
        private final int subnet;

        public ConstCheckFunc(Function arg, int subnet, int netmask) {
            this.arg = arg;
            this.subnet = subnet;
            this.netmask = netmask;
        }

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

        @Override
        public boolean getBool(Record rec) {
            return (arg.getIPv4(rec) & netmask) == subnet;
        }

        @Override
        public void toPlan(PlanSink sink) {
            sink.val(arg);
            sink.val("<<=").val(subnet).val('\'');
        }
    }

    public static class NullCheckFunc extends BooleanFunction implements UnaryFunction {
        private final Function arg;

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

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

        @Override
        public boolean getBool(Record rec) {
            return arg.getIPv4(rec) == IPv4_NULL;
        }

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

}