hazelcast-master/hazelcast-sql/src/main/java/com/hazelcast/jet/sql/impl/validate/operators/math/HazelcastAbsFunction.java
/*
 * Copyright 2023 Hazelcast Inc.
 *
 * Licensed under the Hazelcast Community License (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://hazelcast.com/hazelcast-community-license
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.hazelcast.jet.sql.impl.validate.operators.math;

import com.hazelcast.jet.sql.impl.validate.HazelcastCallBinding;
import com.hazelcast.jet.sql.impl.validate.operand.TypedOperandChecker;
import com.hazelcast.jet.sql.impl.validate.operators.common.HazelcastFunction;
import com.hazelcast.jet.sql.impl.validate.operators.typeinference.ReplaceUnknownOperandTypeInference;
import com.hazelcast.jet.sql.impl.validate.types.HazelcastIntegerType;
import com.hazelcast.jet.sql.impl.validate.types.HazelcastTypeUtils;
import org.apache.calcite.rel.type.RelDataType;
import org.apache.calcite.sql.SqlFunctionCategory;
import org.apache.calcite.sql.SqlKind;
import org.apache.calcite.sql.SqlOperandCountRange;
import org.apache.calcite.sql.type.ReturnTypes;
import org.apache.calcite.sql.type.SqlOperandCountRanges;

import static org.apache.calcite.sql.type.SqlTypeName.BIGINT;

public final class HazelcastAbsFunction extends HazelcastFunction {

    public static final HazelcastAbsFunction INSTANCE = new HazelcastAbsFunction();

    private HazelcastAbsFunction() {
        super(
                "ABS",
                SqlKind.OTHER_FUNCTION,
                ReturnTypes.ARG0,
                new ReplaceUnknownOperandTypeInference(BIGINT),
                SqlFunctionCategory.NUMERIC
        );
    }

    @Override
    public SqlOperandCountRange getOperandCountRange() {
        return SqlOperandCountRanges.of(1);
    }

    @Override
    public boolean checkOperandTypes(HazelcastCallBinding binding, boolean throwOnFailure) {
        RelDataType operandType = binding.getOperandType(0);

        if (HazelcastTypeUtils.isNumericIntegerType(operandType)) {
            int bitWidth = ((HazelcastIntegerType) operandType).getBitWidth();

            operandType = HazelcastIntegerType.create(bitWidth + 1, operandType.isNullable());
        }

        TypedOperandChecker checker = TypedOperandChecker.forType(operandType);

        if (checker.isNumeric()) {
            return checker.check(binding, throwOnFailure, 0);
        }

        if (throwOnFailure) {
            throw binding.newValidationSignatureError();
        } else {
            return false;
        }
    }
}
