com.linkedin.pinot.core.io.util.FixedBitIntReaderWriter.java Source code

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Here is the source code for com.linkedin.pinot.core.io.util.FixedBitIntReaderWriter.java

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/**
 * Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
 *
 * Licensed 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 com.linkedin.pinot.core.io.util;

import com.google.common.base.Preconditions;
import com.linkedin.pinot.core.segment.memory.PinotDataBuffer;
import java.io.Closeable;

public final class FixedBitIntReaderWriter implements Closeable {
    private final PinotDataBitSet _dataBitSet;
    private final int _numBitsPerValue;

    public FixedBitIntReaderWriter(PinotDataBuffer dataBuffer, int numValues, int numBitsPerValue) {
        Preconditions.checkState(
                dataBuffer.size() == (int) (((long) numValues * numBitsPerValue + Byte.SIZE - 1) / Byte.SIZE));
        _dataBitSet = new PinotDataBitSet(dataBuffer);
        _numBitsPerValue = numBitsPerValue;
    }

    public int readInt(int index) {
        return _dataBitSet.readInt(index, _numBitsPerValue);
    }

    public void readInt(int startIndex, int length, int[] buffer) {
        _dataBitSet.readInt(startIndex, _numBitsPerValue, length, buffer);
    }

    public void writeInt(int index, int value) {
        _dataBitSet.writeInt(index, _numBitsPerValue, value);
    }

    public void writeInt(int startIndex, int length, int[] values) {
        _dataBitSet.writeInt(startIndex, _numBitsPerValue, length, values);
    }

    @Override
    public void close() {
        _dataBitSet.close();
    }
}