org.apache.drill.exec.store.parquet.decimal.Int64DecimalParquetValueWriter.java Source code

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Here is the source code for org.apache.drill.exec.store.parquet.decimal.Int64DecimalParquetValueWriter.java

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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.apache.drill.exec.store.parquet.decimal;

import com.google.common.primitives.Longs;
import io.netty.buffer.DrillBuf;
import org.apache.parquet.io.api.RecordConsumer;

import java.util.Arrays;

/**
 * Parquet value writer for passing decimal values
 * into {@code RecordConsumer} to be stored as INT32 type.
 */
public class Int64DecimalParquetValueWriter extends DecimalValueWriter {

    @Override
    public void writeValue(RecordConsumer consumer, DrillBuf buffer, int start, int end, int precision) {
        byte[] output;
        int startPos;
        int length = end - start;
        startPos = Longs.BYTES - length;
        output = new byte[Longs.BYTES];
        if (startPos > 0) {
            buffer.getBytes(start, output, startPos, length);
            if (output[startPos] < 0) {
                Arrays.fill(output, 0, output.length - length, (byte) -1);
            }
        } else {
            // in this case value from FIXED_LEN_BYTE_ARRAY or BINARY field was taken, ignore leading bytes
            buffer.getBytes(start - startPos, output, 0, length + startPos);
        }
        consumer.addLong(Longs.fromByteArray(output));
    }
}