/**
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.apache.atlas.repository.graphdb.janus.serializer;

import org.janusgraph.core.attribute.AttributeSerializer;
import org.janusgraph.diskstorage.ScanBuffer;
import org.janusgraph.diskstorage.WriteBuffer;

import java.math.BigDecimal;
import java.math.BigInteger;

/**
 * Serializer for BigDecimal values.
 */
public class BigDecimalSerializer implements AttributeSerializer<BigDecimal> {
    private final BigIntegerSerializer bigIntegerDelegate = new BigIntegerSerializer();

    @Override
    public BigDecimal read(ScanBuffer buffer) {
        BigInteger unscaledVal = bigIntegerDelegate.read(buffer);
        int        scale       = buffer.getInt();

        return new BigDecimal(unscaledVal, scale);
    }

    @Override
    public void write(WriteBuffer buffer, BigDecimal attribute) {
        BigInteger unscaledVal = attribute.unscaledValue();
        int        scale       = attribute.scale();

        bigIntegerDelegate.write(buffer, unscaledVal);

        buffer.putInt(scale);
    }
}
