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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.dinky.shaded.paimon.casting;

import org.dinky.shaded.paimon.data.Decimal;
import org.dinky.shaded.paimon.types.DataType;
import org.dinky.shaded.paimon.types.DataTypeRoot;
import org.dinky.shaded.paimon.types.DecimalType;
import org.dinky.shaded.paimon.utils.DecimalUtils;

/** {@link DataTypeRoot#DECIMAL} to {@link DataTypeRoot#DECIMAL} cast rule. */
class DecimalToDecimalCastRule extends AbstractCastRule {

    static final DecimalToDecimalCastRule INSTANCE = new DecimalToDecimalCastRule();

    private DecimalToDecimalCastRule() {
        super(
                CastRulePredicate.builder()
                        .input(DataTypeRoot.DECIMAL)
                        .target(DataTypeRoot.DECIMAL)
                        .build());
    }

    @Override
    public CastExecutor create(DataType inputType, DataType targetType) {
        DecimalType decimalType = (DecimalType) targetType;
        return value ->
                DecimalUtils.castToDecimal(
                        value, decimalType.getPrecision(), decimalType.getScale());
    }
}