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From ravipes...@apache.org
Subject [41/54] [abbrv] carbondata git commit: [CARBONDATA-2189] Add DataMapProvider developer interface
Date Thu, 08 Mar 2018 16:55:42 GMT
http://git-wip-us.apache.org/repos/asf/carbondata/blob/89a12af5/core/src/main/java/org/apache/carbondata/core/indexstore/blockletindex/BlockletDataMap.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/indexstore/blockletindex/BlockletDataMap.java b/core/src/main/java/org/apache/carbondata/core/indexstore/blockletindex/BlockletDataMap.java
deleted file mode 100644
index 90178b1..0000000
--- a/core/src/main/java/org/apache/carbondata/core/indexstore/blockletindex/BlockletDataMap.java
+++ /dev/null
@@ -1,971 +0,0 @@
-/*
- * 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.carbondata.core.indexstore.blockletindex;
-
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.DataInputStream;
-import java.io.DataOutput;
-import java.io.DataOutputStream;
-import java.io.IOException;
-import java.io.UnsupportedEncodingException;
-import java.math.BigDecimal;
-import java.nio.ByteBuffer;
-import java.util.ArrayList;
-import java.util.BitSet;
-import java.util.Comparator;
-import java.util.List;
-
-import org.apache.carbondata.common.logging.LogService;
-import org.apache.carbondata.common.logging.LogServiceFactory;
-import org.apache.carbondata.core.cache.Cacheable;
-import org.apache.carbondata.core.constants.CarbonCommonConstants;
-import org.apache.carbondata.core.datamap.dev.DataMapModel;
-import org.apache.carbondata.core.datamap.dev.cgdatamap.AbstractCoarseGrainDataMap;
-import org.apache.carbondata.core.datastore.IndexKey;
-import org.apache.carbondata.core.datastore.block.SegmentProperties;
-import org.apache.carbondata.core.datastore.block.TableBlockInfo;
-import org.apache.carbondata.core.indexstore.BlockMetaInfo;
-import org.apache.carbondata.core.indexstore.Blocklet;
-import org.apache.carbondata.core.indexstore.BlockletDetailInfo;
-import org.apache.carbondata.core.indexstore.ExtendedBlocklet;
-import org.apache.carbondata.core.indexstore.PartitionSpec;
-import org.apache.carbondata.core.indexstore.UnsafeMemoryDMStore;
-import org.apache.carbondata.core.indexstore.row.DataMapRow;
-import org.apache.carbondata.core.indexstore.row.DataMapRowImpl;
-import org.apache.carbondata.core.indexstore.schema.CarbonRowSchema;
-import org.apache.carbondata.core.memory.MemoryException;
-import org.apache.carbondata.core.metadata.blocklet.BlockletInfo;
-import org.apache.carbondata.core.metadata.blocklet.DataFileFooter;
-import org.apache.carbondata.core.metadata.blocklet.index.BlockletIndex;
-import org.apache.carbondata.core.metadata.blocklet.index.BlockletMinMaxIndex;
-import org.apache.carbondata.core.metadata.datatype.DataType;
-import org.apache.carbondata.core.metadata.datatype.DataTypes;
-import org.apache.carbondata.core.metadata.schema.table.column.CarbonMeasure;
-import org.apache.carbondata.core.metadata.schema.table.column.ColumnSchema;
-import org.apache.carbondata.core.scan.filter.FilterExpressionProcessor;
-import org.apache.carbondata.core.scan.filter.FilterUtil;
-import org.apache.carbondata.core.scan.filter.executer.FilterExecuter;
-import org.apache.carbondata.core.scan.filter.executer.ImplicitColumnFilterExecutor;
-import org.apache.carbondata.core.scan.filter.resolver.FilterResolverIntf;
-import org.apache.carbondata.core.util.ByteUtil;
-import org.apache.carbondata.core.util.CarbonUtil;
-import org.apache.carbondata.core.util.DataFileFooterConverter;
-import org.apache.carbondata.core.util.DataTypeUtil;
-import org.apache.carbondata.core.util.path.CarbonTablePath;
-
-import org.apache.commons.lang3.StringUtils;
-import org.apache.hadoop.fs.Path;
-import org.xerial.snappy.Snappy;
-
-/**
- * Datamap implementation for blocklet.
- */
-public class BlockletDataMap extends AbstractCoarseGrainDataMap implements Cacheable {
-
-  private static final LogService LOGGER =
-      LogServiceFactory.getLogService(BlockletDataMap.class.getName());
-
-  private static int KEY_INDEX = 0;
-
-  private static int MIN_VALUES_INDEX = 1;
-
-  private static int MAX_VALUES_INDEX = 2;
-
-  private static int ROW_COUNT_INDEX = 3;
-
-  private static int FILE_PATH_INDEX = 4;
-
-  private static int PAGE_COUNT_INDEX = 5;
-
-  private static int VERSION_INDEX = 6;
-
-  private static int SCHEMA_UPADATED_TIME_INDEX = 7;
-
-  private static int BLOCK_INFO_INDEX = 8;
-
-  private static int BLOCK_FOOTER_OFFSET = 9;
-
-  private static int LOCATIONS = 10;
-
-  private static int BLOCKLET_ID_INDEX = 11;
-
-  private static int BLOCK_LENGTH = 12;
-
-  private static int TASK_MIN_VALUES_INDEX = 0;
-
-  private static int TASK_MAX_VALUES_INDEX = 1;
-
-  private static int SCHEMA = 2;
-
-  private static int INDEX_PATH = 3;
-
-  private static int INDEX_FILE_NAME = 4;
-
-  private static int SEGMENTID = 5;
-
-  private UnsafeMemoryDMStore unsafeMemoryDMStore;
-
-  private UnsafeMemoryDMStore unsafeMemorySummaryDMStore;
-
-  private SegmentProperties segmentProperties;
-
-  private int[] columnCardinality;
-
-  @Override
-  public void init(DataMapModel dataMapModel) throws IOException, MemoryException {
-    long startTime = System.currentTimeMillis();
-    assert (dataMapModel instanceof BlockletDataMapModel);
-    BlockletDataMapModel blockletDataMapInfo = (BlockletDataMapModel) dataMapModel;
-    DataFileFooterConverter fileFooterConverter = new DataFileFooterConverter();
-    List<DataFileFooter> indexInfo = fileFooterConverter
-        .getIndexInfo(blockletDataMapInfo.getFilePath(), blockletDataMapInfo.getFileData());
-    Path path = new Path(blockletDataMapInfo.getFilePath());
-    byte[] filePath = path.getParent().toString().getBytes(CarbonCommonConstants.DEFAULT_CHARSET);
-    byte[] fileName = path.getName().toString().getBytes(CarbonCommonConstants.DEFAULT_CHARSET);
-    byte[] segmentId =
-        blockletDataMapInfo.getSegmentId().getBytes(CarbonCommonConstants.DEFAULT_CHARSET);
-    DataMapRowImpl summaryRow = null;
-    byte[] schemaBinary = null;
-    // below 2 variables will be used for fetching the relative blocklet id. Relative blocklet ID
-    // is id assigned to a blocklet within a part file
-    String tempFilePath = null;
-    int relativeBlockletId = 0;
-    for (DataFileFooter fileFooter : indexInfo) {
-      if (segmentProperties == null) {
-        List<ColumnSchema> columnInTable = fileFooter.getColumnInTable();
-        schemaBinary = convertSchemaToBinary(columnInTable);
-        columnCardinality = fileFooter.getSegmentInfo().getColumnCardinality();
-        segmentProperties = new SegmentProperties(columnInTable, columnCardinality);
-        createSchema(segmentProperties);
-        createSummarySchema(segmentProperties, schemaBinary, filePath, fileName,
-            segmentId);
-      }
-      TableBlockInfo blockInfo = fileFooter.getBlockInfo().getTableBlockInfo();
-      BlockMetaInfo blockMetaInfo =
-          blockletDataMapInfo.getBlockMetaInfoMap().get(blockInfo.getFilePath());
-      // Here it loads info about all blocklets of index
-      // Only add if the file exists physically. There are scenarios which index file exists inside
-      // merge index but related carbondata files are deleted. In that case we first check whether
-      // the file exists physically or not
-      if (blockMetaInfo != null) {
-        if (fileFooter.getBlockletList() == null) {
-          // This is old store scenario, here blocklet information is not available in index file so
-          // load only block info
-          summaryRow =
-              loadToUnsafeBlock(fileFooter, segmentProperties, blockInfo.getFilePath(), summaryRow,
-                  blockMetaInfo);
-        } else {
-          // blocklet ID will start from 0 again only when part file path is changed
-          if (null == tempFilePath || !tempFilePath.equals(blockInfo.getFilePath())) {
-            tempFilePath = blockInfo.getFilePath();
-            relativeBlockletId = 0;
-          }
-          summaryRow =
-              loadToUnsafe(fileFooter, segmentProperties, blockInfo.getFilePath(), summaryRow,
-                  blockMetaInfo, relativeBlockletId);
-          // this is done because relative blocklet id need to be incremented based on the
-          // total number of blocklets
-          relativeBlockletId += fileFooter.getBlockletList().size();
-        }
-      }
-    }
-    if (unsafeMemoryDMStore != null) {
-      unsafeMemoryDMStore.finishWriting();
-    }
-    if (null != unsafeMemorySummaryDMStore) {
-      addTaskSummaryRowToUnsafeMemoryStore(
-          summaryRow,
-          schemaBinary,
-          filePath,
-          fileName,
-          segmentId);
-      unsafeMemorySummaryDMStore.finishWriting();
-    }
-    LOGGER.info(
-        "Time taken to load blocklet datamap from file : " + dataMapModel.getFilePath() + "is " + (
-            System.currentTimeMillis() - startTime));
-  }
-
-  private DataMapRowImpl loadToUnsafe(DataFileFooter fileFooter,
-      SegmentProperties segmentProperties, String filePath, DataMapRowImpl summaryRow,
-      BlockMetaInfo blockMetaInfo, int relativeBlockletId) {
-    int[] minMaxLen = segmentProperties.getColumnsValueSize();
-    List<BlockletInfo> blockletList = fileFooter.getBlockletList();
-    CarbonRowSchema[] schema = unsafeMemoryDMStore.getSchema();
-    // Add one row to maintain task level min max for segment pruning
-    if (!blockletList.isEmpty() && summaryRow == null) {
-      summaryRow = new DataMapRowImpl(unsafeMemorySummaryDMStore.getSchema());
-    }
-    for (int index = 0; index < blockletList.size(); index++) {
-      DataMapRow row = new DataMapRowImpl(schema);
-      int ordinal = 0;
-      int taskMinMaxOrdinal = 0;
-      BlockletInfo blockletInfo = blockletList.get(index);
-
-      // add start key as index key
-      row.setByteArray(blockletInfo.getBlockletIndex().getBtreeIndex().getStartKey(), ordinal++);
-
-      BlockletMinMaxIndex minMaxIndex = blockletInfo.getBlockletIndex().getMinMaxIndex();
-      byte[][] minValues = updateMinValues(minMaxIndex.getMinValues(), minMaxLen);
-      row.setRow(addMinMax(minMaxLen, schema[ordinal], minValues), ordinal);
-      // compute and set task level min values
-      addTaskMinMaxValues(summaryRow, minMaxLen,
-          unsafeMemorySummaryDMStore.getSchema()[taskMinMaxOrdinal], minValues,
-          TASK_MIN_VALUES_INDEX, true);
-      ordinal++;
-      taskMinMaxOrdinal++;
-      byte[][] maxValues = updateMaxValues(minMaxIndex.getMaxValues(), minMaxLen);
-      row.setRow(addMinMax(minMaxLen, schema[ordinal], maxValues), ordinal);
-      // compute and set task level max values
-      addTaskMinMaxValues(summaryRow, minMaxLen,
-          unsafeMemorySummaryDMStore.getSchema()[taskMinMaxOrdinal], maxValues,
-          TASK_MAX_VALUES_INDEX, false);
-      ordinal++;
-
-      row.setInt(blockletInfo.getNumberOfRows(), ordinal++);
-
-      // add file path
-      byte[] filePathBytes = filePath.getBytes(CarbonCommonConstants.DEFAULT_CHARSET_CLASS);
-      row.setByteArray(filePathBytes, ordinal++);
-
-      // add pages
-      row.setShort((short) blockletInfo.getNumberOfPages(), ordinal++);
-
-      // add version number
-      row.setShort(fileFooter.getVersionId().number(), ordinal++);
-
-      // add schema updated time
-      row.setLong(fileFooter.getSchemaUpdatedTimeStamp(), ordinal++);
-
-      // add blocklet info
-      byte[] serializedData;
-      try {
-        ByteArrayOutputStream stream = new ByteArrayOutputStream();
-        DataOutput dataOutput = new DataOutputStream(stream);
-        blockletInfo.write(dataOutput);
-        serializedData = stream.toByteArray();
-        row.setByteArray(serializedData, ordinal++);
-        // Add block footer offset, it is used if we need to read footer of block
-        row.setLong(fileFooter.getBlockInfo().getTableBlockInfo().getBlockOffset(), ordinal++);
-        setLocations(blockMetaInfo.getLocationInfo(), row, ordinal);
-        ordinal++;
-        // for relative blockelt id i.e blocklet id that belongs to a particular part file
-        row.setShort((short) relativeBlockletId++, ordinal++);
-        // Store block size
-        row.setLong(blockMetaInfo.getSize(), ordinal);
-        unsafeMemoryDMStore.addIndexRowToUnsafe(row);
-      } catch (Exception e) {
-        throw new RuntimeException(e);
-      }
-    }
-
-    return summaryRow;
-  }
-
-  private void setLocations(String[] locations, DataMapRow row, int ordinal)
-      throws UnsupportedEncodingException {
-    // Add location info
-    String locationStr = StringUtils.join(locations, ',');
-    row.setByteArray(locationStr.getBytes(CarbonCommonConstants.DEFAULT_CHARSET), ordinal);
-  }
-
-  /**
-   * Load information for the block.It is the case can happen only for old stores
-   * where blocklet information is not available in index file. So load only block information
-   * and read blocklet information in executor.
-   */
-  private DataMapRowImpl loadToUnsafeBlock(DataFileFooter fileFooter,
-      SegmentProperties segmentProperties, String filePath, DataMapRowImpl summaryRow,
-      BlockMetaInfo blockMetaInfo) {
-    int[] minMaxLen = segmentProperties.getColumnsValueSize();
-    BlockletIndex blockletIndex = fileFooter.getBlockletIndex();
-    CarbonRowSchema[] schema = unsafeMemoryDMStore.getSchema();
-    // Add one row to maintain task level min max for segment pruning
-    if (summaryRow == null) {
-      summaryRow = new DataMapRowImpl(unsafeMemorySummaryDMStore.getSchema());
-    }
-    DataMapRow row = new DataMapRowImpl(schema);
-    int ordinal = 0;
-    int taskMinMaxOrdinal = 0;
-    // add start key as index key
-    row.setByteArray(blockletIndex.getBtreeIndex().getStartKey(), ordinal++);
-
-    BlockletMinMaxIndex minMaxIndex = blockletIndex.getMinMaxIndex();
-    byte[][] minValues = updateMinValues(minMaxIndex.getMinValues(), minMaxLen);
-    byte[][] maxValues = updateMaxValues(minMaxIndex.getMaxValues(), minMaxLen);
-    // update min max values in case of old store
-    byte[][] updatedMinValues =
-        CarbonUtil.updateMinMaxValues(fileFooter, maxValues, minValues, true);
-    byte[][] updatedMaxValues =
-        CarbonUtil.updateMinMaxValues(fileFooter, maxValues, minValues, false);
-    row.setRow(addMinMax(minMaxLen, schema[ordinal], updatedMinValues), ordinal);
-    // compute and set task level min values
-    addTaskMinMaxValues(summaryRow, minMaxLen,
-        unsafeMemorySummaryDMStore.getSchema()[taskMinMaxOrdinal], updatedMinValues,
-        TASK_MIN_VALUES_INDEX, true);
-    ordinal++;
-    taskMinMaxOrdinal++;
-    row.setRow(addMinMax(minMaxLen, schema[ordinal], updatedMaxValues), ordinal);
-    // compute and set task level max values
-    addTaskMinMaxValues(summaryRow, minMaxLen,
-        unsafeMemorySummaryDMStore.getSchema()[taskMinMaxOrdinal], updatedMaxValues,
-        TASK_MAX_VALUES_INDEX, false);
-    ordinal++;
-
-    row.setInt((int)fileFooter.getNumberOfRows(), ordinal++);
-
-    // add file path
-    byte[] filePathBytes = filePath.getBytes(CarbonCommonConstants.DEFAULT_CHARSET_CLASS);
-    row.setByteArray(filePathBytes, ordinal++);
-
-    // add pages
-    row.setShort((short) 0, ordinal++);
-
-    // add version number
-    row.setShort(fileFooter.getVersionId().number(), ordinal++);
-
-    // add schema updated time
-    row.setLong(fileFooter.getSchemaUpdatedTimeStamp(), ordinal++);
-
-    // add blocklet info
-    row.setByteArray(new byte[0], ordinal++);
-
-    row.setLong(fileFooter.getBlockInfo().getTableBlockInfo().getBlockOffset(), ordinal++);
-    try {
-      setLocations(blockMetaInfo.getLocationInfo(), row, ordinal);
-      ordinal++;
-      // for relative blocklet id. Value is -1 because in case of old store blocklet info will
-      // not be present in the index file and in that case we will not knwo the total number of
-      // blocklets
-      row.setShort((short) -1, ordinal++);
-
-      // store block size
-      row.setLong(blockMetaInfo.getSize(), ordinal);
-      unsafeMemoryDMStore.addIndexRowToUnsafe(row);
-    } catch (Exception e) {
-      throw new RuntimeException(e);
-    }
-
-    return summaryRow;
-  }
-
-  private void addTaskSummaryRowToUnsafeMemoryStore(DataMapRow summaryRow, byte[] schemaBinary,
-      byte[] filePath, byte[] fileName, byte[] segmentId) {
-    // write the task summary info to unsafe memory store
-    if (null != summaryRow) {
-      // Add column schema , it is useful to generate segment properties in executor.
-      // So we no need to read footer again there.
-      if (schemaBinary != null) {
-        summaryRow.setByteArray(schemaBinary, SCHEMA);
-      }
-      summaryRow.setByteArray(filePath, INDEX_PATH);
-      summaryRow.setByteArray(fileName, INDEX_FILE_NAME);
-      summaryRow.setByteArray(segmentId, SEGMENTID);
-      try {
-        unsafeMemorySummaryDMStore.addIndexRowToUnsafe(summaryRow);
-      } catch (Exception e) {
-        throw new RuntimeException(e);
-      }
-    }
-  }
-
-  /**
-   * Fill the measures min values with minimum , this is needed for backward version compatability
-   * as older versions don't store min values for measures
-   */
-  private byte[][] updateMinValues(byte[][] minValues, int[] minMaxLen) {
-    byte[][] updatedValues = minValues;
-    if (minValues.length < minMaxLen.length) {
-      updatedValues = new byte[minMaxLen.length][];
-      System.arraycopy(minValues, 0, updatedValues, 0, minValues.length);
-      List<CarbonMeasure> measures = segmentProperties.getMeasures();
-      ByteBuffer buffer = ByteBuffer.allocate(8);
-      for (int i = 0; i < measures.size(); i++) {
-        buffer.rewind();
-        DataType dataType = measures.get(i).getDataType();
-        if (dataType == DataTypes.BYTE) {
-          buffer.putLong(Byte.MIN_VALUE);
-          updatedValues[minValues.length + i] = buffer.array().clone();
-        } else if (dataType == DataTypes.SHORT) {
-          buffer.putLong(Short.MIN_VALUE);
-          updatedValues[minValues.length + i] = buffer.array().clone();
-        } else if (dataType == DataTypes.INT) {
-          buffer.putLong(Integer.MIN_VALUE);
-          updatedValues[minValues.length + i] = buffer.array().clone();
-        } else if (dataType == DataTypes.LONG) {
-          buffer.putLong(Long.MIN_VALUE);
-          updatedValues[minValues.length + i] = buffer.array().clone();
-        } else if (DataTypes.isDecimal(dataType)) {
-          updatedValues[minValues.length + i] =
-              DataTypeUtil.bigDecimalToByte(BigDecimal.valueOf(Long.MIN_VALUE));
-        } else {
-          buffer.putDouble(Double.MIN_VALUE);
-          updatedValues[minValues.length + i] = buffer.array().clone();
-        }
-      }
-    }
-    return updatedValues;
-  }
-
-  /**
-   * Fill the measures max values with maximum , this is needed for backward version compatability
-   * as older versions don't store max values for measures
-   */
-  private byte[][] updateMaxValues(byte[][] maxValues, int[] minMaxLen) {
-    byte[][] updatedValues = maxValues;
-    if (maxValues.length < minMaxLen.length) {
-      updatedValues = new byte[minMaxLen.length][];
-      System.arraycopy(maxValues, 0, updatedValues, 0, maxValues.length);
-      List<CarbonMeasure> measures = segmentProperties.getMeasures();
-      ByteBuffer buffer = ByteBuffer.allocate(8);
-      for (int i = 0; i < measures.size(); i++) {
-        buffer.rewind();
-        DataType dataType = measures.get(i).getDataType();
-        if (dataType == DataTypes.BYTE) {
-          buffer.putLong(Byte.MAX_VALUE);
-          updatedValues[maxValues.length + i] = buffer.array().clone();
-        } else if (dataType == DataTypes.SHORT) {
-          buffer.putLong(Short.MAX_VALUE);
-          updatedValues[maxValues.length + i] = buffer.array().clone();
-        } else if (dataType == DataTypes.INT) {
-          buffer.putLong(Integer.MAX_VALUE);
-          updatedValues[maxValues.length + i] = buffer.array().clone();
-        } else if (dataType == DataTypes.LONG) {
-          buffer.putLong(Long.MAX_VALUE);
-          updatedValues[maxValues.length + i] = buffer.array().clone();
-        } else if (DataTypes.isDecimal(dataType)) {
-          updatedValues[maxValues.length + i] =
-              DataTypeUtil.bigDecimalToByte(BigDecimal.valueOf(Long.MAX_VALUE));
-        } else {
-          buffer.putDouble(Double.MAX_VALUE);
-          updatedValues[maxValues.length + i] = buffer.array().clone();
-        }
-      }
-    }
-    return updatedValues;
-  }
-
-  private DataMapRow addMinMax(int[] minMaxLen, CarbonRowSchema carbonRowSchema,
-      byte[][] minValues) {
-    CarbonRowSchema[] minSchemas =
-        ((CarbonRowSchema.StructCarbonRowSchema) carbonRowSchema).getChildSchemas();
-    DataMapRow minRow = new DataMapRowImpl(minSchemas);
-    int minOrdinal = 0;
-    // min value adding
-    for (int i = 0; i < minMaxLen.length; i++) {
-      minRow.setByteArray(minValues[i], minOrdinal++);
-    }
-    return minRow;
-  }
-
-  /**
-   * This method will compute min/max values at task level
-   *
-   * @param taskMinMaxRow
-   * @param minMaxLen
-   * @param carbonRowSchema
-   * @param minMaxValue
-   * @param ordinal
-   * @param isMinValueComparison
-   */
-  private void addTaskMinMaxValues(DataMapRow taskMinMaxRow, int[] minMaxLen,
-      CarbonRowSchema carbonRowSchema, byte[][] minMaxValue, int ordinal,
-      boolean isMinValueComparison) {
-    DataMapRow row = taskMinMaxRow.getRow(ordinal);
-    byte[][] updatedMinMaxValues = minMaxValue;
-    if (null == row) {
-      CarbonRowSchema[] minSchemas =
-          ((CarbonRowSchema.StructCarbonRowSchema) carbonRowSchema).getChildSchemas();
-      row = new DataMapRowImpl(minSchemas);
-    } else {
-      byte[][] existingMinMaxValues = getMinMaxValue(taskMinMaxRow, ordinal);
-      // Compare and update min max values
-      for (int i = 0; i < minMaxLen.length; i++) {
-        int compare =
-            ByteUtil.UnsafeComparer.INSTANCE.compareTo(existingMinMaxValues[i], minMaxValue[i]);
-        if (isMinValueComparison) {
-          if (compare < 0) {
-            updatedMinMaxValues[i] = existingMinMaxValues[i];
-          }
-        } else if (compare > 0) {
-          updatedMinMaxValues[i] = existingMinMaxValues[i];
-        }
-      }
-    }
-    int minMaxOrdinal = 0;
-    // min/max value adding
-    for (int i = 0; i < minMaxLen.length; i++) {
-      row.setByteArray(updatedMinMaxValues[i], minMaxOrdinal++);
-    }
-    taskMinMaxRow.setRow(row, ordinal);
-  }
-
-  private void createSchema(SegmentProperties segmentProperties) throws MemoryException {
-    List<CarbonRowSchema> indexSchemas = new ArrayList<>();
-
-    // Index key
-    indexSchemas.add(new CarbonRowSchema.VariableCarbonRowSchema(DataTypes.BYTE_ARRAY));
-    getMinMaxSchema(segmentProperties, indexSchemas);
-
-    // for number of rows.
-    indexSchemas.add(new CarbonRowSchema.FixedCarbonRowSchema(DataTypes.INT));
-
-    // for table block path
-    indexSchemas.add(new CarbonRowSchema.VariableCarbonRowSchema(DataTypes.BYTE_ARRAY));
-
-    // for number of pages.
-    indexSchemas.add(new CarbonRowSchema.FixedCarbonRowSchema(DataTypes.SHORT));
-
-    // for version number.
-    indexSchemas.add(new CarbonRowSchema.FixedCarbonRowSchema(DataTypes.SHORT));
-
-    // for schema updated time.
-    indexSchemas.add(new CarbonRowSchema.FixedCarbonRowSchema(DataTypes.LONG));
-
-    //for blocklet info
-    indexSchemas.add(new CarbonRowSchema.VariableCarbonRowSchema(DataTypes.BYTE_ARRAY));
-
-    // for block footer offset.
-    indexSchemas.add(new CarbonRowSchema.FixedCarbonRowSchema(DataTypes.LONG));
-
-    // for locations
-    indexSchemas.add(new CarbonRowSchema.VariableCarbonRowSchema(DataTypes.BYTE_ARRAY));
-
-    // for relative blocklet id i.e. blocklet id that belongs to a particular part file.
-    indexSchemas.add(new CarbonRowSchema.FixedCarbonRowSchema(DataTypes.SHORT));
-
-    // for storing block length.
-    indexSchemas.add(new CarbonRowSchema.FixedCarbonRowSchema(DataTypes.LONG));
-
-    unsafeMemoryDMStore =
-        new UnsafeMemoryDMStore(indexSchemas.toArray(new CarbonRowSchema[indexSchemas.size()]));
-  }
-
-  /**
-   * Creates the schema to store summary information or the information which can be stored only
-   * once per datamap. It stores datamap level max/min of each column and partition information of
-   * datamap
-   * @param segmentProperties
-   * @throws MemoryException
-   */
-  private void createSummarySchema(SegmentProperties segmentProperties, byte[] schemaBinary,
-      byte[] filePath, byte[] fileName, byte[] segmentId)
-      throws MemoryException {
-    List<CarbonRowSchema> taskMinMaxSchemas = new ArrayList<>();
-    getMinMaxSchema(segmentProperties, taskMinMaxSchemas);
-    // for storing column schema
-    taskMinMaxSchemas.add(
-        new CarbonRowSchema.FixedCarbonRowSchema(DataTypes.BYTE_ARRAY, schemaBinary.length));
-    // for storing file path
-    taskMinMaxSchemas.add(
-        new CarbonRowSchema.FixedCarbonRowSchema(DataTypes.BYTE_ARRAY, filePath.length));
-    // for storing file name
-    taskMinMaxSchemas.add(
-        new CarbonRowSchema.FixedCarbonRowSchema(DataTypes.BYTE_ARRAY, fileName.length));
-    // for storing segmentid
-    taskMinMaxSchemas.add(
-        new CarbonRowSchema.FixedCarbonRowSchema(DataTypes.BYTE_ARRAY, segmentId.length));
-    unsafeMemorySummaryDMStore = new UnsafeMemoryDMStore(
-        taskMinMaxSchemas.toArray(new CarbonRowSchema[taskMinMaxSchemas.size()]));
-  }
-
-  private void getMinMaxSchema(SegmentProperties segmentProperties,
-      List<CarbonRowSchema> minMaxSchemas) {
-    // Index key
-    int[] minMaxLen = segmentProperties.getColumnsValueSize();
-    // do it 2 times, one for min and one for max.
-    for (int k = 0; k < 2; k++) {
-      CarbonRowSchema[] mapSchemas = new CarbonRowSchema[minMaxLen.length];
-      for (int i = 0; i < minMaxLen.length; i++) {
-        if (minMaxLen[i] <= 0) {
-          mapSchemas[i] = new CarbonRowSchema.VariableCarbonRowSchema(DataTypes.BYTE_ARRAY);
-        } else {
-          mapSchemas[i] =
-              new CarbonRowSchema.FixedCarbonRowSchema(DataTypes.BYTE_ARRAY, minMaxLen[i]);
-        }
-      }
-      CarbonRowSchema mapSchema =
-          new CarbonRowSchema.StructCarbonRowSchema(DataTypes.createDefaultStructType(),
-              mapSchemas);
-      minMaxSchemas.add(mapSchema);
-    }
-  }
-
-  @Override
-  public boolean isScanRequired(FilterResolverIntf filterExp) {
-    FilterExecuter filterExecuter =
-        FilterUtil.getFilterExecuterTree(filterExp, segmentProperties, null);
-    for (int i = 0; i < unsafeMemorySummaryDMStore.getRowCount(); i++) {
-      DataMapRow unsafeRow = unsafeMemorySummaryDMStore.getUnsafeRow(i);
-      boolean isScanRequired = FilterExpressionProcessor.isScanRequired(
-          filterExecuter, getMinMaxValue(unsafeRow, TASK_MAX_VALUES_INDEX),
-          getMinMaxValue(unsafeRow, TASK_MIN_VALUES_INDEX));
-      if (isScanRequired) {
-        return true;
-      }
-    }
-    return false;
-  }
-
-  private List<Blocklet> prune(FilterResolverIntf filterExp, SegmentProperties segmentProperties) {
-    if (unsafeMemoryDMStore.getRowCount() == 0) {
-      return new ArrayList<>();
-    }
-    List<Blocklet> blocklets = new ArrayList<>();
-    if (filterExp == null) {
-      int rowCount = unsafeMemoryDMStore.getRowCount();
-      for (int i = 0; i < rowCount; i++) {
-        DataMapRow safeRow = unsafeMemoryDMStore.getUnsafeRow(i).convertToSafeRow();
-        blocklets.add(createBlocklet(safeRow, safeRow.getShort(BLOCKLET_ID_INDEX)));
-      }
-    } else {
-      // Remove B-tree jump logic as start and end key prepared is not
-      // correct for old store scenarios
-      int startIndex = 0;
-      int endIndex = unsafeMemoryDMStore.getRowCount();
-      FilterExecuter filterExecuter =
-          FilterUtil.getFilterExecuterTree(filterExp, segmentProperties, null);
-      while (startIndex < endIndex) {
-        DataMapRow safeRow = unsafeMemoryDMStore.getUnsafeRow(startIndex).convertToSafeRow();
-        int blockletId = safeRow.getShort(BLOCKLET_ID_INDEX);
-        String filePath = new String(safeRow.getByteArray(FILE_PATH_INDEX),
-            CarbonCommonConstants.DEFAULT_CHARSET_CLASS);
-        boolean isValid =
-            addBlockBasedOnMinMaxValue(filterExecuter, getMinMaxValue(safeRow, MAX_VALUES_INDEX),
-                getMinMaxValue(safeRow, MIN_VALUES_INDEX), filePath, blockletId);
-        if (isValid) {
-          blocklets.add(createBlocklet(safeRow, blockletId));
-        }
-        startIndex++;
-      }
-    }
-    return blocklets;
-  }
-
-  @Override
-  public List<Blocklet> prune(FilterResolverIntf filterExp, SegmentProperties segmentProperties,
-      List<PartitionSpec> partitions) {
-    if (unsafeMemoryDMStore.getRowCount() == 0) {
-      return new ArrayList<>();
-    }
-    // if it has partitioned datamap but there is no partitioned information stored, it means
-    // partitions are dropped so return empty list.
-    if (partitions != null) {
-      // First get the partitions which are stored inside datamap.
-      String[] fileDetails = getFileDetails();
-      // Check the exact match of partition information inside the stored partitions.
-      boolean found = false;
-      Path folderPath = new Path(fileDetails[0]);
-      for (PartitionSpec spec : partitions) {
-        if (folderPath.equals(spec.getLocation()) && isCorrectUUID(fileDetails, spec)) {
-          found = true;
-          break;
-        }
-      }
-      if (!found) {
-        return new ArrayList<>();
-      }
-    }
-    // Prune with filters if the partitions are existed in this datamap
-    return prune(filterExp, segmentProperties);
-  }
-
-  private boolean isCorrectUUID(String[] fileDetails, PartitionSpec spec) {
-    boolean needToScan = false;
-    if (spec.getUuid() != null) {
-      String[] split = spec.getUuid().split("_");
-      if (split[0].equals(fileDetails[2]) && CarbonTablePath.DataFileUtil
-          .getTimeStampFromFileName(fileDetails[1]).equals(split[1])) {
-        needToScan = true;
-      }
-    } else {
-      needToScan = true;
-    }
-    return needToScan;
-  }
-
-  /**
-   * select the blocks based on column min and max value
-   *
-   * @param filterExecuter
-   * @param maxValue
-   * @param minValue
-   * @param filePath
-   * @param blockletId
-   * @return
-   */
-  private boolean addBlockBasedOnMinMaxValue(FilterExecuter filterExecuter, byte[][] maxValue,
-      byte[][] minValue, String filePath, int blockletId) {
-    BitSet bitSet = null;
-    if (filterExecuter instanceof ImplicitColumnFilterExecutor) {
-      String uniqueBlockPath = filePath.substring(filePath.lastIndexOf("/Part") + 1);
-      // this case will come in case of old store where index file does not contain the
-      // blocklet information
-      if (blockletId != -1) {
-        uniqueBlockPath = uniqueBlockPath + CarbonCommonConstants.FILE_SEPARATOR + blockletId;
-      }
-      bitSet = ((ImplicitColumnFilterExecutor) filterExecuter)
-          .isFilterValuesPresentInBlockOrBlocklet(maxValue, minValue, uniqueBlockPath);
-    } else {
-      bitSet = filterExecuter.isScanRequired(maxValue, minValue);
-    }
-    if (!bitSet.isEmpty()) {
-      return true;
-    } else {
-      return false;
-    }
-  }
-
-  public ExtendedBlocklet getDetailedBlocklet(String blockletId) {
-    int index = Integer.parseInt(blockletId);
-    DataMapRow safeRow = unsafeMemoryDMStore.getUnsafeRow(index).convertToSafeRow();
-    return createBlocklet(safeRow, safeRow.getShort(BLOCKLET_ID_INDEX));
-  }
-
-  private byte[][] getMinMaxValue(DataMapRow row, int index) {
-    DataMapRow minMaxRow = row.getRow(index);
-    byte[][] minMax = new byte[minMaxRow.getColumnCount()][];
-    for (int i = 0; i < minMax.length; i++) {
-      minMax[i] = minMaxRow.getByteArray(i);
-    }
-    return minMax;
-  }
-
-  private ExtendedBlocklet createBlocklet(DataMapRow row, int blockletId) {
-    ExtendedBlocklet blocklet = new ExtendedBlocklet(
-        new String(row.getByteArray(FILE_PATH_INDEX), CarbonCommonConstants.DEFAULT_CHARSET_CLASS),
-        blockletId + "");
-    BlockletDetailInfo detailInfo = new BlockletDetailInfo();
-    detailInfo.setRowCount(row.getInt(ROW_COUNT_INDEX));
-    detailInfo.setPagesCount(row.getShort(PAGE_COUNT_INDEX));
-    detailInfo.setVersionNumber(row.getShort(VERSION_INDEX));
-    detailInfo.setBlockletId((short) blockletId);
-    detailInfo.setDimLens(columnCardinality);
-    detailInfo.setSchemaUpdatedTimeStamp(row.getLong(SCHEMA_UPADATED_TIME_INDEX));
-    byte[] byteArray = row.getByteArray(BLOCK_INFO_INDEX);
-    BlockletInfo blockletInfo = null;
-    try {
-      if (byteArray.length > 0) {
-        blockletInfo = new BlockletInfo();
-        ByteArrayInputStream stream = new ByteArrayInputStream(byteArray);
-        DataInputStream inputStream = new DataInputStream(stream);
-        blockletInfo.readFields(inputStream);
-        inputStream.close();
-      }
-      blocklet.setLocation(
-          new String(row.getByteArray(LOCATIONS), CarbonCommonConstants.DEFAULT_CHARSET)
-              .split(","));
-    } catch (IOException e) {
-      throw new RuntimeException(e);
-    }
-    detailInfo.setBlockletInfo(blockletInfo);
-    blocklet.setDetailInfo(detailInfo);
-    detailInfo.setBlockFooterOffset(row.getLong(BLOCK_FOOTER_OFFSET));
-    detailInfo.setColumnSchemaBinary(getColumnSchemaBinary());
-    detailInfo.setBlockSize(row.getLong(BLOCK_LENGTH));
-    return blocklet;
-  }
-
-  private String[] getFileDetails() {
-    try {
-      String[] fileDetails = new String[3];
-      DataMapRow unsafeRow = unsafeMemorySummaryDMStore.getUnsafeRow(0);
-      fileDetails[0] =
-          new String(unsafeRow.getByteArray(INDEX_PATH), CarbonCommonConstants.DEFAULT_CHARSET);
-      fileDetails[1] = new String(unsafeRow.getByteArray(INDEX_FILE_NAME),
-          CarbonCommonConstants.DEFAULT_CHARSET);
-      fileDetails[2] = new String(unsafeRow.getByteArray(SEGMENTID),
-          CarbonCommonConstants.DEFAULT_CHARSET);
-      return fileDetails;
-    } catch (Exception e) {
-      throw new RuntimeException(e);
-    }
-  }
-
-
-  /**
-   * Binary search used to get the first tentative index row based on
-   * search key
-   *
-   * @param key search key
-   * @return first tentative block
-   */
-  private int findStartIndex(DataMapRow key, Comparator<DataMapRow> comparator) {
-    int childNodeIndex;
-    int low = 0;
-    int high = unsafeMemoryDMStore.getRowCount() - 1;
-    int mid = 0;
-    int compareRes = -1;
-    //
-    while (low <= high) {
-      mid = (low + high) >>> 1;
-      // compare the entries
-      compareRes = comparator.compare(key, unsafeMemoryDMStore.getUnsafeRow(mid));
-      if (compareRes < 0) {
-        high = mid - 1;
-      } else if (compareRes > 0) {
-        low = mid + 1;
-      } else {
-        // if key is matched then get the first entry
-        int currentPos = mid;
-        while (currentPos - 1 >= 0
-            && comparator.compare(key, unsafeMemoryDMStore.getUnsafeRow(currentPos - 1)) == 0) {
-          currentPos--;
-        }
-        mid = currentPos;
-        break;
-      }
-    }
-    // if compare result is less than zero then we
-    // and mid is more than 0 then we need to previous block as duplicates
-    // record can be present
-    if (compareRes < 0) {
-      if (mid > 0) {
-        mid--;
-      }
-      childNodeIndex = mid;
-    } else {
-      childNodeIndex = mid;
-    }
-    // get the leaf child
-    return childNodeIndex;
-  }
-
-  /**
-   * Binary search used to get the last tentative block  based on
-   * search key
-   *
-   * @param key search key
-   * @return first tentative block
-   */
-  private int findEndIndex(DataMapRow key, Comparator<DataMapRow> comparator) {
-    int childNodeIndex;
-    int low = 0;
-    int high = unsafeMemoryDMStore.getRowCount() - 1;
-    int mid = 0;
-    int compareRes = -1;
-    //
-    while (low <= high) {
-      mid = (low + high) >>> 1;
-      // compare the entries
-      compareRes = comparator.compare(key, unsafeMemoryDMStore.getUnsafeRow(mid));
-      if (compareRes < 0) {
-        high = mid - 1;
-      } else if (compareRes > 0) {
-        low = mid + 1;
-      } else {
-        int currentPos = mid;
-        // if key is matched then get the first entry
-        while (currentPos + 1 < unsafeMemoryDMStore.getRowCount()
-            && comparator.compare(key, unsafeMemoryDMStore.getUnsafeRow(currentPos + 1)) == 0) {
-          currentPos++;
-        }
-        mid = currentPos;
-        break;
-      }
-    }
-    // if compare result is less than zero then we
-    // and mid is more than 0 then we need to previous block as duplicates
-    // record can be present
-    if (compareRes < 0) {
-      if (mid > 0) {
-        mid--;
-      }
-      childNodeIndex = mid;
-    } else {
-      childNodeIndex = mid;
-    }
-    return childNodeIndex;
-  }
-
-  private DataMapRow convertToRow(IndexKey key) {
-    ByteBuffer buffer =
-        ByteBuffer.allocate(key.getDictionaryKeys().length + key.getNoDictionaryKeys().length + 8);
-    buffer.putInt(key.getDictionaryKeys().length);
-    buffer.putInt(key.getNoDictionaryKeys().length);
-    buffer.put(key.getDictionaryKeys());
-    buffer.put(key.getNoDictionaryKeys());
-    DataMapRowImpl dataMapRow = new DataMapRowImpl(unsafeMemoryDMStore.getSchema());
-    dataMapRow.setByteArray(buffer.array(), 0);
-    return dataMapRow;
-  }
-
-  private byte[] getColumnSchemaBinary() {
-    DataMapRow unsafeRow = unsafeMemorySummaryDMStore.getUnsafeRow(0);
-    return unsafeRow.getByteArray(SCHEMA);
-  }
-
-  /**
-   * Convert schema to binary
-   */
-  private byte[] convertSchemaToBinary(List<ColumnSchema> columnSchemas) throws IOException {
-    ByteArrayOutputStream stream = new ByteArrayOutputStream();
-    DataOutput dataOutput = new DataOutputStream(stream);
-    dataOutput.writeShort(columnSchemas.size());
-    for (ColumnSchema columnSchema : columnSchemas) {
-      if (columnSchema.getColumnReferenceId() == null) {
-        columnSchema.setColumnReferenceId(columnSchema.getColumnUniqueId());
-      }
-      columnSchema.write(dataOutput);
-    }
-    byte[] byteArray = stream.toByteArray();
-    // Compress with snappy to reduce the size of schema
-    return Snappy.rawCompress(byteArray, byteArray.length);
-  }
-
-  @Override
-  public void clear() {
-    if (unsafeMemoryDMStore != null) {
-      unsafeMemoryDMStore.freeMemory();
-      unsafeMemoryDMStore = null;
-      segmentProperties = null;
-    }
-    // clear task min/max unsafe memory
-    if (null != unsafeMemorySummaryDMStore) {
-      unsafeMemorySummaryDMStore.freeMemory();
-      unsafeMemorySummaryDMStore = null;
-    }
-  }
-
-  @Override
-  public long getFileTimeStamp() {
-    return 0;
-  }
-
-  @Override
-  public int getAccessCount() {
-    return 0;
-  }
-
-  @Override
-  public long getMemorySize() {
-    long memoryUsed = 0L;
-    if (unsafeMemoryDMStore != null) {
-      memoryUsed += unsafeMemoryDMStore.getMemoryUsed();
-    }
-    if (null != unsafeMemorySummaryDMStore) {
-      memoryUsed += unsafeMemorySummaryDMStore.getMemoryUsed();
-    }
-    return memoryUsed;
-  }
-
-  public SegmentProperties getSegmentProperties() {
-    return segmentProperties;
-  }
-
-}

http://git-wip-us.apache.org/repos/asf/carbondata/blob/89a12af5/core/src/main/java/org/apache/carbondata/core/indexstore/blockletindex/BlockletDataMapFactory.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/indexstore/blockletindex/BlockletDataMapFactory.java b/core/src/main/java/org/apache/carbondata/core/indexstore/blockletindex/BlockletDataMapFactory.java
deleted file mode 100644
index 43df813..0000000
--- a/core/src/main/java/org/apache/carbondata/core/indexstore/blockletindex/BlockletDataMapFactory.java
+++ /dev/null
@@ -1,285 +0,0 @@
-/*
- * 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.carbondata.core.indexstore.blockletindex;
-
-import java.io.IOException;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-import org.apache.carbondata.core.cache.Cache;
-import org.apache.carbondata.core.cache.CacheProvider;
-import org.apache.carbondata.core.cache.CacheType;
-import org.apache.carbondata.core.datamap.DataMapDistributable;
-import org.apache.carbondata.core.datamap.DataMapMeta;
-import org.apache.carbondata.core.datamap.Segment;
-import org.apache.carbondata.core.datamap.dev.AbstractDataMapWriter;
-import org.apache.carbondata.core.datamap.dev.DataMap;
-import org.apache.carbondata.core.datamap.dev.cgdatamap.AbstractCoarseGrainDataMap;
-import org.apache.carbondata.core.datamap.dev.cgdatamap.AbstractCoarseGrainDataMapFactory;
-import org.apache.carbondata.core.datastore.block.SegmentProperties;
-import org.apache.carbondata.core.datastore.filesystem.CarbonFile;
-import org.apache.carbondata.core.datastore.impl.FileFactory;
-import org.apache.carbondata.core.indexstore.Blocklet;
-import org.apache.carbondata.core.indexstore.BlockletDetailsFetcher;
-import org.apache.carbondata.core.indexstore.ExtendedBlocklet;
-import org.apache.carbondata.core.indexstore.PartitionSpec;
-import org.apache.carbondata.core.indexstore.SegmentPropertiesFetcher;
-import org.apache.carbondata.core.indexstore.TableBlockIndexUniqueIdentifier;
-import org.apache.carbondata.core.metadata.AbsoluteTableIdentifier;
-import org.apache.carbondata.core.metadata.SegmentFileStore;
-import org.apache.carbondata.core.metadata.schema.table.DataMapSchema;
-import org.apache.carbondata.core.util.path.CarbonTablePath;
-import org.apache.carbondata.events.Event;
-
-import org.apache.hadoop.fs.FileSystem;
-import org.apache.hadoop.fs.LocatedFileStatus;
-import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.fs.RemoteIterator;
-
-/**
- * Table map for blocklet
- */
-public class BlockletDataMapFactory extends AbstractCoarseGrainDataMapFactory
-    implements BlockletDetailsFetcher, SegmentPropertiesFetcher {
-
-  private static final String NAME = "clustered.btree.blocklet";
-
-  public static final DataMapSchema DATA_MAP_SCHEMA =
-      new DataMapSchema(NAME, BlockletDataMapFactory.class.getName());
-
-  private AbsoluteTableIdentifier identifier;
-
-  // segmentId -> list of index file
-  private Map<String, List<TableBlockIndexUniqueIdentifier>> segmentMap = new HashMap<>();
-
-  private Cache<TableBlockIndexUniqueIdentifier, AbstractCoarseGrainDataMap> cache;
-
-  @Override
-  public void init(AbsoluteTableIdentifier identifier, DataMapSchema dataMapSchema) {
-    this.identifier = identifier;
-    cache = CacheProvider.getInstance()
-        .createCache(CacheType.DRIVER_BLOCKLET_DATAMAP);
-  }
-
-  @Override
-  public AbstractDataMapWriter createWriter(Segment segment, String writeDirectoryPath) {
-    throw new UnsupportedOperationException("not implemented");
-  }
-
-  @Override
-  public List<AbstractCoarseGrainDataMap> getDataMaps(Segment segment) throws IOException {
-    List<TableBlockIndexUniqueIdentifier> tableBlockIndexUniqueIdentifiers =
-        getTableBlockIndexUniqueIdentifiers(segment);
-    return cache.getAll(tableBlockIndexUniqueIdentifiers);
-  }
-
-  private List<TableBlockIndexUniqueIdentifier> getTableBlockIndexUniqueIdentifiers(
-      Segment segment) throws IOException {
-    List<TableBlockIndexUniqueIdentifier> tableBlockIndexUniqueIdentifiers =
-        segmentMap.get(segment.getSegmentNo());
-    if (tableBlockIndexUniqueIdentifiers == null) {
-      tableBlockIndexUniqueIdentifiers = new ArrayList<>();
-      Map<String, String> indexFiles;
-      if (segment.getSegmentFileName() == null) {
-        String path =
-            CarbonTablePath.getSegmentPath(identifier.getTablePath(), segment.getSegmentNo());
-        indexFiles = new SegmentIndexFileStore().getIndexFilesFromSegment(path);
-      } else {
-        SegmentFileStore fileStore =
-            new SegmentFileStore(identifier.getTablePath(), segment.getSegmentFileName());
-        indexFiles = fileStore.getIndexFiles();
-      }
-      for (Map.Entry<String, String> indexFileEntry: indexFiles.entrySet()) {
-        Path indexFile = new Path(indexFileEntry.getKey());
-        tableBlockIndexUniqueIdentifiers.add(
-            new TableBlockIndexUniqueIdentifier(indexFile.getParent().toString(),
-                indexFile.getName(), indexFileEntry.getValue(), segment.getSegmentNo()));
-      }
-      segmentMap.put(segment.getSegmentNo(), tableBlockIndexUniqueIdentifiers);
-    }
-    return tableBlockIndexUniqueIdentifiers;
-  }
-
-  /**
-   * Get the blocklet detail information based on blockletid, blockid and segmentid. This method is
-   * exclusively for BlockletDataMapFactory as detail information is only available in this default
-   * datamap.
-   */
-  @Override
-  public List<ExtendedBlocklet> getExtendedBlocklets(List<Blocklet> blocklets, Segment segment)
-      throws IOException {
-    List<ExtendedBlocklet> detailedBlocklets = new ArrayList<>();
-    // If it is already detailed blocklet then type cast and return same
-    if (blocklets.size() > 0 && blocklets.get(0) instanceof ExtendedBlocklet) {
-      for (Blocklet blocklet : blocklets) {
-        detailedBlocklets.add((ExtendedBlocklet) blocklet);
-      }
-      return detailedBlocklets;
-    }
-    List<TableBlockIndexUniqueIdentifier> identifiers =
-        getTableBlockIndexUniqueIdentifiers(segment);
-    // Retrieve each blocklets detail information from blocklet datamap
-    for (Blocklet blocklet : blocklets) {
-      detailedBlocklets.add(getExtendedBlocklet(identifiers, blocklet));
-    }
-    return detailedBlocklets;
-  }
-
-  @Override
-  public ExtendedBlocklet getExtendedBlocklet(Blocklet blocklet, Segment segment)
-      throws IOException {
-    if (blocklet instanceof ExtendedBlocklet) {
-      return (ExtendedBlocklet) blocklet;
-    }
-    List<TableBlockIndexUniqueIdentifier> identifiers =
-        getTableBlockIndexUniqueIdentifiers(segment);
-    return getExtendedBlocklet(identifiers, blocklet);
-  }
-
-  private ExtendedBlocklet getExtendedBlocklet(List<TableBlockIndexUniqueIdentifier> identifiers,
-      Blocklet blocklet) throws IOException {
-    String carbonIndexFileName = CarbonTablePath.getCarbonIndexFileName(blocklet.getBlockId());
-    for (TableBlockIndexUniqueIdentifier identifier : identifiers) {
-      if (identifier.getIndexFilePath().equals(carbonIndexFileName)) {
-        DataMap dataMap = cache.get(identifier);
-        return ((BlockletDataMap) dataMap).getDetailedBlocklet(blocklet.getBlockletId());
-      }
-    }
-    throw new IOException("Blocklet with blockid " + blocklet.getBlockletId() + " not found ");
-  }
-
-
-  @Override
-  public List<DataMapDistributable> toDistributable(Segment segment) {
-    List<DataMapDistributable> distributables = new ArrayList<>();
-    try {
-      CarbonFile[] carbonIndexFiles;
-      if (segment.getSegmentFileName() == null) {
-        carbonIndexFiles = SegmentIndexFileStore.getCarbonIndexFiles(
-            CarbonTablePath.getSegmentPath(identifier.getTablePath(), segment.getSegmentNo()));
-      } else {
-        SegmentFileStore fileStore =
-            new SegmentFileStore(identifier.getTablePath(), segment.getSegmentFileName());
-        Map<String, String> indexFiles = fileStore.getIndexFiles();
-        carbonIndexFiles = new CarbonFile[indexFiles.size()];
-        int i = 0;
-        for (String indexFile : indexFiles.keySet()) {
-          carbonIndexFiles[i++] = FileFactory.getCarbonFile(indexFile);
-        }
-      }
-      for (int i = 0; i < carbonIndexFiles.length; i++) {
-        Path path = new Path(carbonIndexFiles[i].getPath());
-
-        FileSystem fs = path.getFileSystem(FileFactory.getConfiguration());
-        RemoteIterator<LocatedFileStatus> iter = fs.listLocatedStatus(path);
-        LocatedFileStatus fileStatus = iter.next();
-        String[] location = fileStatus.getBlockLocations()[0].getHosts();
-        BlockletDataMapDistributable distributable =
-            new BlockletDataMapDistributable(path.toString());
-        distributable.setLocations(location);
-        distributables.add(distributable);
-      }
-    } catch (IOException e) {
-      throw new RuntimeException(e);
-    }
-    return distributables;
-  }
-
-  @Override
-  public void fireEvent(Event event) {
-
-  }
-
-  @Override
-  public void clear(Segment segment) {
-    List<TableBlockIndexUniqueIdentifier> blockIndexes = segmentMap.remove(segment.getSegmentNo());
-    if (blockIndexes != null) {
-      for (TableBlockIndexUniqueIdentifier blockIndex : blockIndexes) {
-        DataMap dataMap = cache.getIfPresent(blockIndex);
-        if (dataMap != null) {
-          cache.invalidate(blockIndex);
-          dataMap.clear();
-        }
-      }
-    }
-  }
-
-  @Override
-  public void clear() {
-    for (String segmentId : segmentMap.keySet().toArray(new String[segmentMap.size()])) {
-      clear(new Segment(segmentId, null));
-    }
-  }
-
-  @Override
-  public List<AbstractCoarseGrainDataMap> getDataMaps(DataMapDistributable distributable)
-      throws IOException {
-    BlockletDataMapDistributable mapDistributable = (BlockletDataMapDistributable) distributable;
-    List<TableBlockIndexUniqueIdentifier> identifiers = new ArrayList<>();
-    Path indexPath = new Path(mapDistributable.getFilePath());
-    String segmentNo = mapDistributable.getSegment().getSegmentNo();
-    if (indexPath.getName().endsWith(CarbonTablePath.INDEX_FILE_EXT)) {
-      String parent = indexPath.getParent().toString();
-      identifiers
-          .add(new TableBlockIndexUniqueIdentifier(parent, indexPath.getName(), null, segmentNo));
-    } else if (indexPath.getName().endsWith(CarbonTablePath.MERGE_INDEX_FILE_EXT)) {
-      SegmentIndexFileStore fileStore = new SegmentIndexFileStore();
-      CarbonFile carbonFile = FileFactory.getCarbonFile(indexPath.toString());
-      String parentPath = carbonFile.getParentFile().getAbsolutePath();
-      List<String> indexFiles = fileStore.getIndexFilesFromMergeFile(carbonFile.getAbsolutePath());
-      for (String indexFile : indexFiles) {
-        identifiers.add(
-            new TableBlockIndexUniqueIdentifier(parentPath, indexFile, carbonFile.getName(),
-                segmentNo));
-      }
-    }
-    List<AbstractCoarseGrainDataMap> dataMaps;
-    try {
-      dataMaps = cache.getAll(identifiers);
-    } catch (IOException e) {
-      throw new RuntimeException(e);
-    }
-    return dataMaps;
-  }
-
-  @Override
-  public DataMapMeta getMeta() {
-    // TODO: pass SORT_COLUMNS into this class
-    return null;
-  }
-
-  @Override public SegmentProperties getSegmentProperties(Segment segment) throws IOException {
-    List<AbstractCoarseGrainDataMap> dataMaps = getDataMaps(segment);
-    assert (dataMaps.size() > 0);
-    AbstractCoarseGrainDataMap coarseGrainDataMap = dataMaps.get(0);
-    assert (coarseGrainDataMap instanceof BlockletDataMap);
-    BlockletDataMap dataMap = (BlockletDataMap) coarseGrainDataMap;
-    return dataMap.getSegmentProperties();
-  }
-
-  @Override public List<Blocklet> getAllBlocklets(Segment segment, List<PartitionSpec> partitions)
-      throws IOException {
-    List<Blocklet> blocklets = new ArrayList<>();
-    List<AbstractCoarseGrainDataMap> dataMaps = getDataMaps(segment);
-    for (AbstractCoarseGrainDataMap dataMap : dataMaps) {
-      blocklets.addAll(dataMap.prune(null, getSegmentProperties(segment), partitions));
-    }
-    return blocklets;
-  }
-}

http://git-wip-us.apache.org/repos/asf/carbondata/blob/89a12af5/core/src/main/java/org/apache/carbondata/core/indexstore/blockletindex/BlockletDataMapModel.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/indexstore/blockletindex/BlockletDataMapModel.java b/core/src/main/java/org/apache/carbondata/core/indexstore/blockletindex/BlockletDataMapModel.java
index ebeb278..018c3f7 100644
--- a/core/src/main/java/org/apache/carbondata/core/indexstore/blockletindex/BlockletDataMapModel.java
+++ b/core/src/main/java/org/apache/carbondata/core/indexstore/blockletindex/BlockletDataMapModel.java
@@ -22,7 +22,7 @@ import org.apache.carbondata.core.datamap.dev.DataMapModel;
 import org.apache.carbondata.core.indexstore.BlockMetaInfo;
 
 /**
- * It is the model object to keep the information to build or initialize BlockletDataMap.
+ * It is the model object to keep the information to build or initialize BlockletIndexDataMap.
  */
 public class BlockletDataMapModel extends DataMapModel {
 


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