CutIpv6.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.TernaryExpression;
import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
import org.apache.doris.nereids.types.IPv6Type;
import org.apache.doris.nereids.types.TinyIntType;
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 cut_ipv6
 */
public class CutIpv6 extends ScalarFunction
        implements TernaryExpression, ExplicitlyCastableSignature, PropagateNullable {

    public static final List<FunctionSignature> SIGNATURES = ImmutableList.of(
            FunctionSignature.ret(VarcharType.SYSTEM_DEFAULT)
                .args(IPv6Type.INSTANCE, TinyIntType.INSTANCE, TinyIntType.INSTANCE));

    public CutIpv6(Expression arg0, Expression arg1, Expression arg2) {
        super("cut_ipv6", arg0, arg1, arg2);
    }

    @Override
    public CutIpv6 withChildren(List<Expression> children) {
        Preconditions.checkArgument(children.size() == 3,
                "cut_ipv6 accept 3 args, but got %s (%s)",
                children.size(),
                children);
        return new CutIpv6(children.get(0), children.get(1), children.get(2));
    }

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

    @Override
    public <R, C> R accept(ExpressionVisitor<R, C> visitor, C context) {
        return visitor.visitCutIpv6(this, context);
    }
}