Ipv6StringToNumOrDefault.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.AlwaysNotNullable;
import org.apache.doris.nereids.trees.expressions.functions.ExplicitlyCastableSignature;
import org.apache.doris.nereids.trees.expressions.shape.BinaryExpression;
import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
import org.apache.doris.nereids.types.StringType;
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_string_to_num_or_default
 */
public class Ipv6StringToNumOrDefault extends ScalarFunction
        implements BinaryExpression, ExplicitlyCastableSignature, AlwaysNotNullable {

    public static final List<FunctionSignature> SIGNATURES = ImmutableList.of(
            FunctionSignature.ret(VarcharType.SYSTEM_DEFAULT).args(VarcharType.SYSTEM_DEFAULT),
            FunctionSignature.ret(StringType.INSTANCE).args(StringType.INSTANCE));

    public Ipv6StringToNumOrDefault(Expression arg0) {
        super("ipv6_string_to_num_or_default", arg0);
    }

    @Override
    public Ipv6StringToNumOrDefault withChildren(List<Expression> children) {
        Preconditions.checkArgument(children.size() == 1,
                "ipv6_string_to_num_or_default accept 1 args, but got %s (%s)",
                children.size(),
                children);
        return new Ipv6StringToNumOrDefault(children.get(0));
    }

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

    @Override
    public <R, C> R accept(ExpressionVisitor<R, C> visitor, C context) {
        return visitor.visitIpv6StringToNumOrDefault(this, context);
    }
}