WeekOfYear.java

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// to you under the Apache License, Version 2.0 (the
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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.PropagateNullableOnDateOrTimeLikeV2Args;
import org.apache.doris.nereids.trees.expressions.shape.UnaryExpression;
import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
import org.apache.doris.nereids.types.DateTimeType;
import org.apache.doris.nereids.types.DateTimeV2Type;
import org.apache.doris.nereids.types.DateV2Type;
import org.apache.doris.nereids.types.TinyIntType;

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

import java.util.List;

/**
 * ScalarFunction 'weekofyear'. This class is generated by GenerateFunction.
 */
public class WeekOfYear extends ScalarFunction
        implements UnaryExpression, ExplicitlyCastableSignature, PropagateNullableOnDateOrTimeLikeV2Args {

    private static final List<FunctionSignature> SIGNATURES = ImmutableList.of(
            FunctionSignature.ret(TinyIntType.INSTANCE).args(DateV2Type.INSTANCE),
            FunctionSignature.ret(TinyIntType.INSTANCE).args(DateTimeV2Type.SYSTEM_DEFAULT),
            FunctionSignature.ret(TinyIntType.INSTANCE).args(DateTimeType.INSTANCE)
    );

    /**
     * constructor with 1 argument.
     */
    public WeekOfYear(Expression arg) {
        super("weekofyear", arg);
    }

    /**
     * withChildren.
     */
    @Override
    public WeekOfYear withChildren(List<Expression> children) {
        Preconditions.checkArgument(children.size() == 1);
        return new WeekOfYear(children.get(0));
    }

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

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