| /* |
| * 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.iotdb.tsfile.read.common.block.column; |
| |
| import org.apache.iotdb.tsfile.file.metadata.enums.TSDataType; |
| import org.apache.iotdb.tsfile.utils.Binary; |
| import org.apache.iotdb.tsfile.utils.RamUsageEstimator; |
| import org.apache.iotdb.tsfile.utils.TsPrimitiveType; |
| |
| import java.util.Arrays; |
| |
| import static java.lang.String.format; |
| import static java.util.Objects.requireNonNull; |
| import static org.apache.iotdb.tsfile.read.common.block.column.ColumnUtil.checkValidRegion; |
| |
| public class RunLengthEncodedColumn implements Column { |
| |
| private static final int INSTANCE_SIZE = |
| (int) RamUsageEstimator.shallowSizeOfInstance(RunLengthEncodedColumn.class); |
| |
| private final Column value; |
| private final int positionCount; |
| |
| public RunLengthEncodedColumn(Column value, int positionCount) { |
| requireNonNull(value, "value is null"); |
| if (value.getPositionCount() != 1) { |
| throw new IllegalArgumentException( |
| format( |
| "Expected value to contain a single position but has %s positions", |
| value.getPositionCount())); |
| } |
| |
| if (value instanceof RunLengthEncodedColumn) { |
| this.value = ((RunLengthEncodedColumn) value).getValue(); |
| } else { |
| this.value = value; |
| } |
| |
| if (positionCount < 0) { |
| throw new IllegalArgumentException("positionCount is negative"); |
| } |
| |
| this.positionCount = positionCount; |
| } |
| |
| public Column getValue() { |
| return value; |
| } |
| |
| @Override |
| public TSDataType getDataType() { |
| return value.getDataType(); |
| } |
| |
| @Override |
| public ColumnEncoding getEncoding() { |
| return ColumnEncoding.RLE; |
| } |
| |
| @Override |
| public boolean getBoolean(int position) { |
| return value.getBoolean(0); |
| } |
| |
| @Override |
| public int getInt(int position) { |
| return value.getInt(0); |
| } |
| |
| @Override |
| public long getLong(int position) { |
| return value.getLong(0); |
| } |
| |
| @Override |
| public float getFloat(int position) { |
| return value.getFloat(0); |
| } |
| |
| @Override |
| public double getDouble(int position) { |
| return value.getDouble(0); |
| } |
| |
| @Override |
| public Binary getBinary(int position) { |
| return value.getBinary(0); |
| } |
| |
| @Override |
| public Object getObject(int position) { |
| return value.getObject(0); |
| } |
| |
| @Override |
| public boolean[] getBooleans() { |
| boolean[] res = new boolean[positionCount]; |
| Arrays.fill(res, value.getBoolean(0)); |
| return res; |
| } |
| |
| @Override |
| public int[] getInts() { |
| int[] res = new int[positionCount]; |
| Arrays.fill(res, value.getInt(0)); |
| return res; |
| } |
| |
| @Override |
| public long[] getLongs() { |
| long[] res = new long[positionCount]; |
| Arrays.fill(res, value.getLong(0)); |
| return res; |
| } |
| |
| @Override |
| public float[] getFloats() { |
| float[] res = new float[positionCount]; |
| Arrays.fill(res, value.getFloat(0)); |
| return res; |
| } |
| |
| @Override |
| public double[] getDoubles() { |
| double[] res = new double[positionCount]; |
| Arrays.fill(res, value.getDouble(0)); |
| return res; |
| } |
| |
| @Override |
| public Binary[] getBinaries() { |
| Binary[] res = new Binary[positionCount]; |
| Arrays.fill(res, value.getBinary(0)); |
| return res; |
| } |
| |
| @Override |
| public Object[] getObjects() { |
| Object[] res = new Object[positionCount]; |
| Arrays.fill(res, value.getObject(0)); |
| return res; |
| } |
| |
| @Override |
| public TsPrimitiveType getTsPrimitiveType(int position) { |
| return value.getTsPrimitiveType(0); |
| } |
| |
| @Override |
| public boolean mayHaveNull() { |
| return value.mayHaveNull(); |
| } |
| |
| @Override |
| public boolean isNull(int position) { |
| return value.isNull(0); |
| } |
| |
| @Override |
| public boolean[] isNull() { |
| boolean[] res = new boolean[positionCount]; |
| Arrays.fill(res, value.isNull(0)); |
| return res; |
| } |
| |
| @Override |
| public int getPositionCount() { |
| return positionCount; |
| } |
| |
| @Override |
| public long getRetainedSizeInBytes() { |
| return INSTANCE_SIZE + value.getRetainedSizeInBytes(); |
| } |
| |
| @Override |
| public Column getRegion(int positionOffset, int length) { |
| checkValidRegion(positionCount, positionOffset, length); |
| return new RunLengthEncodedColumn(value, length); |
| } |
| |
| @Override |
| public Column subColumn(int fromIndex) { |
| if (fromIndex > positionCount) { |
| throw new IllegalArgumentException("fromIndex is not valid"); |
| } |
| return new RunLengthEncodedColumn(value, positionCount - fromIndex); |
| } |
| |
| @Override |
| public void reverse() { |
| // do nothing because the underlying column has only one value |
| } |
| |
| @Override |
| public int getInstanceSize() { |
| return INSTANCE_SIZE; |
| } |
| } |