GroupBitmapXor.java

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

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.shape.UnaryExpression;
import org.apache.doris.nereids.trees.expressions.visitor.ExpressionVisitor;
import org.apache.doris.nereids.types.BitmapType;
import org.apache.doris.nereids.types.DataType;

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

import java.util.List;

/**
 * AggregateFunction 'group_bitmap_xor'. This class is generated by GenerateFunction.
 */
public class GroupBitmapXor extends NullableAggregateFunction
        implements UnaryExpression, ExplicitlyCastableSignature {

    public static final List<FunctionSignature> SIGNATURES = ImmutableList.of(
            FunctionSignature.ret(BitmapType.INSTANCE).args(BitmapType.INSTANCE)
    );

    /**
     * constructor with 1 argument.
     */
    public GroupBitmapXor(Expression arg) {
        this(false, false, arg);
    }

    /**
     * constructor with 1 argument.
     */
    public GroupBitmapXor(boolean distinct, Expression arg) {
        this(distinct, false, arg);
    }

    private GroupBitmapXor(boolean distinct, boolean alwaysNullable, Expression arg0) {
        /* distinct is meaningless to bitmap */
        super("group_bitmap_xor", false, alwaysNullable, arg0);
    }

    @Override
    protected List<DataType> intermediateTypes() {
        return ImmutableList.of(BitmapType.INSTANCE);
    }

    /**
     * withDistinctAndChildren.
     */
    @Override
    public GroupBitmapXor withDistinctAndChildren(boolean distinct, List<Expression> children) {
        Preconditions.checkArgument(children.size() == 1);
        return new GroupBitmapXor(distinct, alwaysNullable, children.get(0));
    }

    @Override
    public NullableAggregateFunction withAlwaysNullable(boolean alwaysNullable) {
        return new GroupBitmapXor(distinct, alwaysNullable, children.get(0));
    }

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

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