Ipv6CIDRToRange.java

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package org.apache.doris.nereids.trees.expressions.functions.scalar;

import org.apache.doris.catalog.FunctionSignature;
import org.apache.doris.nereids.trees.expressions.Expression;
import org.apache.doris.nereids.trees.expressions.functions.ExplicitlyCastableSignature;
import org.apache.doris.nereids.trees.expressions.functions.PropagateNullable;
import org.apache.doris.nereids.trees.expressions.shape.BinaryExpression;
import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
import org.apache.doris.nereids.types.IPv6Type;
import org.apache.doris.nereids.types.SmallIntType;
import org.apache.doris.nereids.types.StringType;
import org.apache.doris.nereids.types.StructField;
import org.apache.doris.nereids.types.StructType;
import org.apache.doris.nereids.types.VarcharType;

import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;

import java.util.List;

/**
 * scalar function `ipv6_cidr_to_range`
 */
public class Ipv6CIDRToRange extends ScalarFunction
        implements BinaryExpression, ExplicitlyCastableSignature, PropagateNullable {

    public static final List<FunctionSignature> SIGNATURES;

    static {
        ImmutableList.Builder<StructField> structFields = ImmutableList.builder();
        structFields.add(new StructField("min", IPv6Type.INSTANCE, false, ""));
        structFields.add(new StructField("max", IPv6Type.INSTANCE, false, ""));
        StructType retType = new StructType(structFields.build());
        SIGNATURES = ImmutableList.of(
                FunctionSignature.ret(retType).args(IPv6Type.INSTANCE, SmallIntType.INSTANCE),
                FunctionSignature.ret(retType).args(VarcharType.SYSTEM_DEFAULT, SmallIntType.INSTANCE),
                FunctionSignature.ret(retType).args(StringType.INSTANCE, SmallIntType.INSTANCE));
    }

    public Ipv6CIDRToRange(Expression arg0, Expression arg1) {
        super("ipv6_cidr_to_range", arg0, arg1);
    }

    @Override
    public Ipv6CIDRToRange withChildren(List<Expression> children) {
        Preconditions.checkArgument(children.size() == 2,
                "ipv6_cidr_to_range accept 2 args, but got %s (%s)",
                children.size(),
                children);
        return new Ipv6CIDRToRange(children.get(0), children.get(1));
    }

    @Override
    public List<FunctionSignature> getSignatures() {
        return SIGNATURES;
    }

    @Override
    public <R, C> R accept(ExpressionVisitor<R, C> visitor, C context) {
        return visitor.visitIpv6CIDRToRange(this, context);
    }
}