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From chenliang...@apache.org
Subject [35/52] [partial] incubator-carbondata git commit: move core package
Date Mon, 16 Jan 2017 14:53:12 GMT
http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/ce09aaaf/core/src/main/java/org/apache/carbondata/core/datastore/compression/none/CompressionNoneLong.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/datastore/compression/none/CompressionNoneLong.java b/core/src/main/java/org/apache/carbondata/core/datastore/compression/none/CompressionNoneLong.java
new file mode 100644
index 0000000..04bab54
--- /dev/null
+++ b/core/src/main/java/org/apache/carbondata/core/datastore/compression/none/CompressionNoneLong.java
@@ -0,0 +1,99 @@
+/*
+ * 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.datastore.compression.none;
+
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+
+import org.apache.carbondata.common.logging.LogService;
+import org.apache.carbondata.common.logging.LogServiceFactory;
+import org.apache.carbondata.core.datastore.chunk.store.MeasureChunkStoreFactory;
+import org.apache.carbondata.core.datastore.chunk.store.MeasureDataChunkStore;
+import org.apache.carbondata.core.datastore.compression.Compressor;
+import org.apache.carbondata.core.datastore.compression.CompressorFactory;
+import org.apache.carbondata.core.datastore.compression.ValueCompressionHolder;
+import org.apache.carbondata.core.util.ValueCompressionUtil;
+import org.apache.carbondata.core.util.ValueCompressionUtil.DataType;
+
+public class CompressionNoneLong extends ValueCompressionHolder<long[]> {
+  /**
+   * Attribute for Carbon LOGGER
+   */
+  private static final LogService LOGGER =
+      LogServiceFactory.getLogService(CompressionNoneLong.class.getName());
+  /**
+   * longCompressor.
+   */
+  private static Compressor compressor = CompressorFactory.getInstance().getCompressor();
+  /**
+   * value.
+   */
+  protected long[] value;
+
+  private DataType actualDataType;
+
+  private MeasureDataChunkStore<long[]> measureChunkStore;
+
+  public CompressionNoneLong(DataType actualDataType) {
+    this.actualDataType = actualDataType;
+  }
+
+  @Override public void setValue(long[] value) { this.value = value;  }
+
+  @Override public long[] getValue() { return this.value; }
+
+  @Override public void compress() {
+    compressedValue = super.compress(compressor, DataType.DATA_LONG, value);
+  }
+
+  @Override
+  public void uncompress(DataType dataType, byte[] data, int offset, int length,
+      int decimalPlaces, Object maxValueObject) {
+    super.unCompress(compressor, dataType, data, offset, length);
+    setUncompressedValues(value);
+  }
+
+  @Override public void setValueInBytes(byte[] byteValue) {
+    ByteBuffer buffer = ByteBuffer.wrap(byteValue);
+    this.value = ValueCompressionUtil.convertToLongArray(buffer, byteValue.length);
+  }
+
+  @Override public long getLongValue(int index) {
+    return measureChunkStore.getLong(index);
+  }
+
+  @Override public double getDoubleValue(int index) {
+    return measureChunkStore.getLong(index);
+  }
+
+  @Override public BigDecimal getBigDecimalValue(int index) {
+    throw new UnsupportedOperationException("Get big decimal is not supported");
+  }
+
+  private void setUncompressedValues(long[] data) {
+    this.measureChunkStore =
+      MeasureChunkStoreFactory.INSTANCE.getMeasureDataChunkStore(DataType.DATA_LONG, data.length);
+    this.measureChunkStore.putData(data);
+  }
+
+  @Override public void freeMemory() {
+    this.measureChunkStore.freeMemory();
+  }
+}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/ce09aaaf/core/src/main/java/org/apache/carbondata/core/datastore/compression/none/CompressionNoneShort.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/datastore/compression/none/CompressionNoneShort.java b/core/src/main/java/org/apache/carbondata/core/datastore/compression/none/CompressionNoneShort.java
new file mode 100644
index 0000000..b84c562
--- /dev/null
+++ b/core/src/main/java/org/apache/carbondata/core/datastore/compression/none/CompressionNoneShort.java
@@ -0,0 +1,104 @@
+/*
+ * 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.datastore.compression.none;
+
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+
+import org.apache.carbondata.common.logging.LogService;
+import org.apache.carbondata.common.logging.LogServiceFactory;
+import org.apache.carbondata.core.datastore.chunk.store.MeasureChunkStoreFactory;
+import org.apache.carbondata.core.datastore.chunk.store.MeasureDataChunkStore;
+import org.apache.carbondata.core.datastore.compression.Compressor;
+import org.apache.carbondata.core.datastore.compression.CompressorFactory;
+import org.apache.carbondata.core.datastore.compression.ValueCompressionHolder;
+import org.apache.carbondata.core.util.ValueCompressionUtil;
+import org.apache.carbondata.core.util.ValueCompressionUtil.DataType;
+
+public class CompressionNoneShort extends ValueCompressionHolder<short[]> {
+  /**
+   * Attribute for Carbon LOGGER
+   */
+  private static final LogService LOGGER =
+      LogServiceFactory.getLogService(CompressionNoneShort.class.getName());
+
+  /**
+   * shortCompressor.
+   */
+  private static Compressor compressor = CompressorFactory.getInstance().getCompressor();
+
+  /**
+   * value.
+   */
+  private short[] shortValue;
+
+  private MeasureDataChunkStore<short[]> measureChunkStore;
+
+  private DataType actualDataType;
+
+  public CompressionNoneShort(DataType actualDataType) {
+    this.actualDataType = actualDataType;
+  }
+
+  @Override public void setValue(short[] shortValue) {
+    this.shortValue = shortValue;
+  }
+
+  @Override public short[] getValue() { return this.shortValue; }
+
+  @Override
+  public void uncompress(DataType dataType, byte[] data, int offset, int length,
+      int decimalPlaces, Object maxValueObject) {
+    super.unCompress(compressor, dataType, data, offset, length);
+    setUncompressedValues(shortValue);
+  }
+
+  @Override public void compress() {
+    compressedValue = super.compress(compressor, DataType.DATA_SHORT, shortValue);
+  }
+
+  @Override public void setValueInBytes(byte[] value) {
+    ByteBuffer buffer = ByteBuffer.wrap(value);
+    shortValue = ValueCompressionUtil.convertToShortArray(buffer, value.length);
+  }
+
+  @Override public long getLongValue(int index) {
+    return measureChunkStore.getShort(index);
+  }
+
+  @Override public double getDoubleValue(int index) {
+    return measureChunkStore.getShort(index);
+  }
+
+  @Override public BigDecimal getBigDecimalValue(int index) {
+    throw new UnsupportedOperationException(
+      "Big decimal is not defined for CompressionNonShort");
+  }
+
+  private void setUncompressedValues(short[] data) {
+    this.measureChunkStore = MeasureChunkStoreFactory.INSTANCE
+        .getMeasureDataChunkStore(DataType.DATA_SHORT, data.length);
+    this.measureChunkStore.putData(data);
+  }
+
+  @Override public void freeMemory() {
+    this.measureChunkStore.freeMemory();
+  }
+}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/ce09aaaf/core/src/main/java/org/apache/carbondata/core/datastore/compression/type/CompressionBigDecimal.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/datastore/compression/type/CompressionBigDecimal.java b/core/src/main/java/org/apache/carbondata/core/datastore/compression/type/CompressionBigDecimal.java
new file mode 100644
index 0000000..eb0e5d0
--- /dev/null
+++ b/core/src/main/java/org/apache/carbondata/core/datastore/compression/type/CompressionBigDecimal.java
@@ -0,0 +1,146 @@
+/*
+ * 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.datastore.compression.type;
+
+
+import java.math.BigDecimal;
+import java.nio.ByteBuffer;
+
+import org.apache.carbondata.common.logging.LogService;
+import org.apache.carbondata.common.logging.LogServiceFactory;
+import org.apache.carbondata.core.constants.CarbonCommonConstants;
+import org.apache.carbondata.core.datastore.compression.ValueCompressionHolder;
+import org.apache.carbondata.core.util.BigDecimalCompressionFinder;
+import org.apache.carbondata.core.util.ValueCompressionUtil.DataType;
+
+/**
+ * Big decimal compression
+ */
+public class CompressionBigDecimal<T> extends ValueCompressionHolder<T> {
+
+  private static final LogService LOGGER =
+          LogServiceFactory.getLogService(CompressionBigDecimal.class.getName());
+
+  private BigDecimalCompressionFinder compressionFinder;
+
+  /**
+   * leftPart before decimal
+   */
+  private ValueCompressionHolder leftPart;
+
+  /**
+   * rightPart after decimal
+   */
+  private ValueCompressionHolder rightPart;
+
+  private double divisionFactor;
+
+  private boolean isDecimalPlacesNotZero;
+
+  public CompressionBigDecimal(BigDecimalCompressionFinder compressionFinder,
+      ValueCompressionHolder leftPart, ValueCompressionHolder rightPart) {
+    this.compressionFinder = compressionFinder;
+    this.leftPart = leftPart;
+    this.rightPart = rightPart;
+  }
+
+  @Override public void setValue(T value) {
+    Object[] values = (Object[]) value;
+    leftPart.setValue(values[0]);
+    rightPart.setValue(values[1]);
+  }
+
+  @Override
+  public void uncompress(DataType dataType, byte[] data, int offset, int length,
+      int decimalPlaces, Object maxValueObject) {
+    if (decimalPlaces > 0) {
+      this.isDecimalPlacesNotZero = true;
+    }
+    this.divisionFactor = Math.pow(10, decimalPlaces);
+
+    ByteBuffer buffer = ByteBuffer.wrap(data, offset, length);
+    int leftPathLength = buffer.getInt();
+    int rightPartLength = length - leftPathLength - CarbonCommonConstants.INT_SIZE_IN_BYTE;
+    Long[] maxValue = (Long[]) maxValueObject;
+    leftPart.uncompress(compressionFinder.getLeftConvertedDataType(), data,
+        offset + CarbonCommonConstants.INT_SIZE_IN_BYTE, leftPathLength, decimalPlaces,
+        maxValue[0]);
+    rightPart.uncompress(compressionFinder.getRightConvertedDataType(), data,
+        offset + CarbonCommonConstants.INT_SIZE_IN_BYTE + leftPathLength, rightPartLength,
+        decimalPlaces, maxValue[1]);
+  }
+
+  @Override public long getLongValue(int index) {
+    throw new UnsupportedOperationException(
+      "Long is not defined for CompressionBigDecimal");
+  }
+
+  @Override public double getDoubleValue(int index) {
+    throw new UnsupportedOperationException(
+      "Double is not defined for CompressionBigDecimal");
+  }
+
+  @Override public BigDecimal getBigDecimalValue(int index) {
+    long leftValue = leftPart.getLongValue(index);
+    long rightValue = 0;
+    if (isDecimalPlacesNotZero) {
+      rightValue = rightPart.getLongValue(index);
+    }
+    String decimalPart = Double.toString(rightValue / this.divisionFactor);
+    String bigdStr = Long.toString(leftValue) + CarbonCommonConstants.POINT + decimalPart
+            .substring(decimalPart.indexOf(".") + 1, decimalPart.length());
+    return new BigDecimal(bigdStr);
+  }
+
+  @Override public T getValue() {
+    Object[] values = new Object[2];
+    values[0] = leftPart;
+    values[1] = rightPart;
+    return (T) values;
+  }
+
+  @Override public void setValueInBytes(byte[] value) {
+    LOGGER.error("setValueInBytes() is not defined for CompressionBigDecimal");
+  }
+
+  @Override public void compress() {
+    leftPart.compress();
+    rightPart.compress();
+  }
+
+  @Override
+  public byte[] getCompressedData() {
+    byte[] leftdata = leftPart.getCompressedData();
+    byte[] rightdata = rightPart.getCompressedData();
+    ByteBuffer byteBuffer = ByteBuffer
+        .allocate(CarbonCommonConstants.INT_SIZE_IN_BYTE + leftdata.length
+            + rightdata.length);
+    byteBuffer.putInt(leftdata.length);
+    byteBuffer.put(leftdata);
+    byteBuffer.put(rightdata);
+    byteBuffer.flip();
+    return byteBuffer.array();
+  }
+
+  @Override public void freeMemory() {
+    leftPart.freeMemory();
+    rightPart.freeMemory();
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/ce09aaaf/core/src/main/java/org/apache/carbondata/core/datastore/dataholder/CarbonReadDataHolder.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/datastore/dataholder/CarbonReadDataHolder.java b/core/src/main/java/org/apache/carbondata/core/datastore/dataholder/CarbonReadDataHolder.java
new file mode 100644
index 0000000..6bd28fc
--- /dev/null
+++ b/core/src/main/java/org/apache/carbondata/core/datastore/dataholder/CarbonReadDataHolder.java
@@ -0,0 +1,50 @@
+/*
+ * 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.datastore.dataholder;
+
+import java.math.BigDecimal;
+
+import org.apache.carbondata.core.datastore.compression.ValueCompressionHolder;
+
+// This class is used with Uncompressor to hold the decompressed column chunk in memory
+public class CarbonReadDataHolder {
+
+  private ValueCompressionHolder unCompressValue;
+
+  public CarbonReadDataHolder(ValueCompressionHolder unCompressValue) {
+    this.unCompressValue = unCompressValue;
+  }
+
+  public long getReadableLongValueByIndex(int index) {
+    return this.unCompressValue.getLongValue(index);
+  }
+
+  public BigDecimal getReadableBigDecimalValueByIndex(int index) {
+    return this.unCompressValue.getBigDecimalValue(index);
+  }
+
+  public double getReadableDoubleValueByIndex(int index) {
+    return this.unCompressValue.getDoubleValue(index);
+  }
+
+  public void freeMemory() {
+    unCompressValue.freeMemory();
+  }
+}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/ce09aaaf/core/src/main/java/org/apache/carbondata/core/datastore/dataholder/CarbonWriteDataHolder.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/datastore/dataholder/CarbonWriteDataHolder.java b/core/src/main/java/org/apache/carbondata/core/datastore/dataholder/CarbonWriteDataHolder.java
new file mode 100644
index 0000000..23799e8
--- /dev/null
+++ b/core/src/main/java/org/apache/carbondata/core/datastore/dataholder/CarbonWriteDataHolder.java
@@ -0,0 +1,280 @@
+/*
+ * 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.datastore.dataholder;
+
+public class CarbonWriteDataHolder {
+  /**
+   * doubleValues
+   */
+  private double[] doubleValues;
+
+  /**
+   * longValues
+   */
+  private long[] longValues;
+
+  /**
+   * bigDecimal left part
+   */
+  private long[] bigDecimalLeftValues;
+
+  /**
+   * bigDecimal right part
+   */
+  private long[] bigDecimalRightValues;
+  /**
+   * byteValues
+   */
+  private byte[][] byteValues;
+
+  /**
+   * byteValues for no dictionary and non kettle flow.
+   */
+  private byte[][][] byteValuesForNonDictionary;
+
+  /**
+   * byteValues
+   */
+  private byte[][][] columnByteValues;
+
+  /**
+   * size
+   */
+  private int size;
+
+  /**
+   * totalSize
+   */
+  private int totalSize;
+
+  /**
+   * Method to initialise double array
+   *
+   * @param size
+   */
+  public void initialiseDoubleValues(int size) {
+    if (size < 1) {
+      throw new IllegalArgumentException("Invalid array size");
+    }
+    doubleValues = new double[size];
+  }
+
+  public void reset() {
+    size = 0;
+    totalSize = 0;
+  }
+
+  /**
+   * Method to initialise double array
+   * TODO Remove after kettle flow got removed.
+   *
+   * @param size
+   */
+  public void initialiseByteArrayValues(int size) {
+    if (size < 1) {
+      throw new IllegalArgumentException("Invalid array size");
+    }
+
+    byteValues = new byte[size][];
+    columnByteValues = new byte[size][][];
+  }
+
+  /**
+   * Method to initialise byte array
+   *
+   * @param size
+   */
+  public void initialiseByteArrayValuesWithOutKettle(int size) {
+    if (size < 1) {
+      throw new IllegalArgumentException("Invalid array size");
+    }
+
+    byteValues = new byte[size][];
+  }
+
+  public void initialiseByteArrayValuesForNonDictionary(int size) {
+    if (size < 1) {
+      throw new IllegalArgumentException("Invalid array size");
+    }
+
+    byteValuesForNonDictionary = new byte[size][][];
+  }
+
+  /**
+   * Method to initialise long array
+   *
+   * @param size
+   */
+  public void initialiseLongValues(int size) {
+    if (size < 1) {
+      throw new IllegalArgumentException("Invalid array size");
+    }
+    longValues = new long[size];
+  }
+
+  public void initialiseBigDecimalValues(int size) {
+    if (size < 1) {
+      throw new IllegalArgumentException("Invalid array size");
+    }
+    bigDecimalLeftValues = new long[size];
+    bigDecimalRightValues = new long[size];
+  }
+
+  /**
+   * set double value by index
+   *
+   * @param index
+   * @param value
+   */
+  public void setWritableDoubleValueByIndex(int index, Object value) {
+    doubleValues[index] = (Double) value;
+    size++;
+  }
+
+  /**
+   * set double value by index
+   *
+   * @param index
+   * @param value
+   */
+  public void setWritableLongValueByIndex(int index, Object value) {
+    longValues[index] = (Long) value;
+    size++;
+  }
+
+  /**
+   * set bigdecimal value by index
+   *
+   * @param index
+   * @param value
+   */
+  public void setWritableBigDecimalValueByIndex(int index, long[] value) {
+    bigDecimalLeftValues[index] = value[0];
+    bigDecimalRightValues[index] = value[1];
+    size++;
+  }
+  /**
+   * set byte array value by index
+   *
+   * @param index
+   * @param value
+   */
+  public void setWritableByteArrayValueByIndex(int index, byte[] value) {
+    byteValues[index] = value;
+    size++;
+    if (null != value) totalSize += value.length;
+  }
+
+  public void setWritableNonDictByteArrayValueByIndex(int index, byte[][] value) {
+    byteValuesForNonDictionary[index] = value;
+    size++;
+    if (null != value) totalSize += value.length;
+  }
+
+  /**
+   * set byte array value by index
+   */
+  public void setWritableByteArrayValueByIndex(int index, int mdKeyIndex, Object[] columnData) {
+    int l = 0;
+    columnByteValues[index] = new byte[columnData.length - (mdKeyIndex + 1)][];
+    for (int i = mdKeyIndex + 1; i < columnData.length; i++) {
+      columnByteValues[index][l++] = (byte[]) columnData[i];
+    }
+  }
+
+  /**
+   * Get Writable Double Values
+   */
+  public double[] getWritableDoubleValues() {
+    if (size < doubleValues.length) {
+      double[] temp = new double[size];
+      System.arraycopy(doubleValues, 0, temp, 0, size);
+      doubleValues = temp;
+    }
+    return doubleValues;
+  }
+
+  /**
+   * Get writable byte array values
+   */
+  public byte[] getWritableByteArrayValues() {
+    byte[] temp = new byte[totalSize];
+    int startIndexToCopy = 0;
+    for (int i = 0; i < size; i++) {
+      System.arraycopy(byteValues[i], 0, temp, startIndexToCopy, byteValues[i].length);
+      startIndexToCopy += byteValues[i].length;
+    }
+    return temp;
+  }
+
+  public byte[][] getByteArrayValues() {
+    if (size < byteValues.length) {
+      byte[][] temp = new byte[size][];
+      System.arraycopy(byteValues, 0, temp, 0, size);
+      byteValues = temp;
+    }
+    return byteValues;
+  }
+
+  public byte[][][] getNonDictByteArrayValues() {
+    if (size < byteValuesForNonDictionary.length) {
+      byte[][][] temp = new byte[size][][];
+      System.arraycopy(byteValuesForNonDictionary, 0, temp, 0, size);
+      byteValuesForNonDictionary = temp;
+    }
+    return byteValuesForNonDictionary;
+  }
+
+  /**
+   * Get Writable Double Values
+   *
+   * @return
+   */
+  public long[] getWritableLongValues() {
+    if (size < longValues.length) {
+      long[] temp = new long[size];
+      System.arraycopy(longValues, 0, temp, 0, size);
+      longValues = temp;
+    }
+    return longValues;
+  }
+
+  /**
+   * Get Writable bigdecimal Values
+   *
+   * @return
+   */
+  public long[][] getWritableBigDecimalValues() {
+    long[][] bigDecimalValues = new long[2][];
+    if (size < bigDecimalLeftValues.length) {
+      long[] temp = new long[size];
+      System.arraycopy(bigDecimalLeftValues, 0, temp, 0, size);
+      bigDecimalLeftValues = temp;
+    }
+    if (size < bigDecimalRightValues.length) {
+      long[] temp = new long[size];
+      System.arraycopy(bigDecimalRightValues, 0, temp, 0, size);
+      bigDecimalRightValues = temp;
+    }
+    bigDecimalValues[0]= bigDecimalLeftValues;
+    bigDecimalValues[1] = bigDecimalRightValues;
+    return bigDecimalValues;
+  }
+}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/ce09aaaf/core/src/main/java/org/apache/carbondata/core/datastore/exception/IndexBuilderException.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/datastore/exception/IndexBuilderException.java b/core/src/main/java/org/apache/carbondata/core/datastore/exception/IndexBuilderException.java
new file mode 100644
index 0000000..7b97d98
--- /dev/null
+++ b/core/src/main/java/org/apache/carbondata/core/datastore/exception/IndexBuilderException.java
@@ -0,0 +1,96 @@
+/*
+ * 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.datastore.exception;
+
+import java.io.IOException;
+import java.util.Locale;
+
+/**
+ * Exception class for block builder
+ *
+ * @author Administrator
+ */
+public class IndexBuilderException extends IOException {
+  /**
+   * default serial version ID.
+   */
+  private static final long serialVersionUID = 1L;
+
+  /**
+   * The Error message.
+   */
+  private String msg = "";
+
+  /**
+   * Constructor
+   *
+   * @param msg       The error message for this exception.
+   */
+  public IndexBuilderException(String msg) {
+    super(msg);
+    this.msg = msg;
+  }
+
+  /**
+   * Constructor
+   *
+   * @param msg       exception message
+   * @param throwable detail exception
+   */
+  public IndexBuilderException(String msg, Throwable throwable) {
+    super(msg, throwable);
+    this.msg = msg;
+  }
+
+  /**
+   * Constructor
+   *
+   * @param throwable exception
+   */
+  public IndexBuilderException(Throwable throwable) {
+    super(throwable);
+  }
+
+  /**
+   * This method is used to get the localized message.
+   *
+   * @param locale - A Locale object represents a specific geographical,
+   *               political, or cultural region.
+   * @return - Localized error message.
+   */
+  public String getLocalizedMessage(Locale locale) {
+    return "";
+  }
+
+  /**
+   * getLocalizedMessage
+   */
+  @Override public String getLocalizedMessage() {
+    return super.getLocalizedMessage();
+  }
+
+  /**
+   * getMessage
+   */
+  public String getMessage() {
+    return this.msg;
+  }
+}
+

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/ce09aaaf/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/AbstractDFSCarbonFile.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/AbstractDFSCarbonFile.java b/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/AbstractDFSCarbonFile.java
new file mode 100644
index 0000000..01ad646
--- /dev/null
+++ b/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/AbstractDFSCarbonFile.java
@@ -0,0 +1,217 @@
+/*
+ * 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.datastore.filesystem;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+
+import org.apache.carbondata.common.logging.LogService;
+import org.apache.carbondata.common.logging.LogServiceFactory;
+import org.apache.carbondata.core.constants.CarbonCommonConstants;
+import org.apache.carbondata.core.datastore.impl.FileFactory;
+import org.apache.carbondata.core.util.CarbonUtil;
+
+import org.apache.hadoop.fs.FileStatus;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+
+public abstract  class AbstractDFSCarbonFile implements CarbonFile {
+  /**
+   * LOGGER
+   */
+  private static final LogService LOGGER =
+      LogServiceFactory.getLogService(AbstractDFSCarbonFile.class.getName());
+  protected FileStatus fileStatus;
+  protected FileSystem fs;
+
+  public AbstractDFSCarbonFile(String filePath) {
+    filePath = filePath.replace("\\", "/");
+    Path path = new Path(filePath);
+    try {
+      fs = path.getFileSystem(FileFactory.getConfiguration());
+      fileStatus = fs.getFileStatus(path);
+    } catch (IOException e) {
+      LOGGER.error("Exception occured:" + e.getMessage());
+    }
+  }
+
+  public AbstractDFSCarbonFile(Path path) {
+    try {
+      fs = path.getFileSystem(FileFactory.getConfiguration());
+      fileStatus = fs.getFileStatus(path);
+    } catch (IOException e) {
+      LOGGER.error("Exception occured:" + e.getMessage());
+    }
+  }
+
+  public AbstractDFSCarbonFile(FileStatus fileStatus) {
+    this.fileStatus = fileStatus;
+  }
+
+  @Override public boolean createNewFile() {
+    Path path = fileStatus.getPath();
+    try {
+      return fs.createNewFile(path);
+    } catch (IOException e) {
+      return false;
+    }
+  }
+
+  @Override public String getAbsolutePath() {
+    return fileStatus.getPath().toString();
+  }
+
+  @Override public String getName() {
+    return fileStatus.getPath().getName();
+  }
+
+  @Override public boolean isDirectory() {
+    return fileStatus.isDirectory();
+  }
+
+  @Override public boolean exists() {
+    try {
+      if (null != fileStatus) {
+        fs = fileStatus.getPath().getFileSystem(FileFactory.getConfiguration());
+        return fs.exists(fileStatus.getPath());
+      }
+    } catch (IOException e) {
+      LOGGER.error("Exception occured:" + e.getMessage());
+    }
+    return false;
+  }
+
+  @Override public String getCanonicalPath() {
+    return getAbsolutePath();
+  }
+
+  @Override public String getPath() {
+    return getAbsolutePath();
+  }
+
+  @Override public long getSize() {
+    return fileStatus.getLen();
+  }
+
+  public boolean renameTo(String changetoName) {
+    FileSystem fs;
+    try {
+      fs = fileStatus.getPath().getFileSystem(FileFactory.getConfiguration());
+      return fs.rename(fileStatus.getPath(), new Path(changetoName));
+    } catch (IOException e) {
+      LOGGER.error("Exception occured:" + e.getMessage());
+      return false;
+    }
+  }
+
+  public boolean delete() {
+    FileSystem fs;
+    try {
+      fs = fileStatus.getPath().getFileSystem(FileFactory.getConfiguration());
+      return fs.delete(fileStatus.getPath(), true);
+    } catch (IOException e) {
+      LOGGER.error("Exception occured:" + e.getMessage());
+      return false;
+    }
+  }
+
+  @Override public long getLastModifiedTime() {
+    return fileStatus.getModificationTime();
+  }
+
+  @Override public boolean setLastModifiedTime(long timestamp) {
+    try {
+      fs.setTimes(fileStatus.getPath(), timestamp, timestamp);
+    } catch (IOException e) {
+      return false;
+    }
+    return true;
+  }
+
+  /**
+   * This method will delete the data in file data from a given offset
+   */
+  @Override public boolean truncate(String fileName, long validDataEndOffset) {
+    DataOutputStream dataOutputStream = null;
+    DataInputStream dataInputStream = null;
+    boolean fileTruncatedSuccessfully = false;
+    // if bytes to read less than 1024 then buffer size should be equal to the given offset
+    int bufferSize = validDataEndOffset > CarbonCommonConstants.BYTE_TO_KB_CONVERSION_FACTOR ?
+        CarbonCommonConstants.BYTE_TO_KB_CONVERSION_FACTOR :
+        (int) validDataEndOffset;
+    // temporary file name
+    String tempWriteFilePath = fileName + CarbonCommonConstants.TEMPWRITEFILEEXTENSION;
+    FileFactory.FileType fileType = FileFactory.getFileType(fileName);
+    try {
+      CarbonFile tempFile = null;
+      // delete temporary file if it already exists at a given path
+      if (FileFactory.isFileExist(tempWriteFilePath, fileType)) {
+        tempFile = FileFactory.getCarbonFile(tempWriteFilePath, fileType);
+        tempFile.delete();
+      }
+      // create new temporary file
+      FileFactory.createNewFile(tempWriteFilePath, fileType);
+      tempFile = FileFactory.getCarbonFile(tempWriteFilePath, fileType);
+      byte[] buff = new byte[bufferSize];
+      dataInputStream = FileFactory.getDataInputStream(fileName, fileType);
+      // read the data
+      int read = dataInputStream.read(buff, 0, buff.length);
+      dataOutputStream = FileFactory.getDataOutputStream(tempWriteFilePath, fileType);
+      dataOutputStream.write(buff, 0, read);
+      long remaining = validDataEndOffset - read;
+      // anytime we should not cross the offset to be read
+      while (remaining > 0) {
+        if (remaining > bufferSize) {
+          buff = new byte[bufferSize];
+        } else {
+          buff = new byte[(int) remaining];
+        }
+        read = dataInputStream.read(buff, 0, buff.length);
+        dataOutputStream.write(buff, 0, read);
+        remaining = remaining - read;
+      }
+      CarbonUtil.closeStreams(dataInputStream, dataOutputStream);
+      // rename the temp file to original file
+      tempFile.renameForce(fileName);
+      fileTruncatedSuccessfully = true;
+    } catch (IOException e) {
+      LOGGER.error("Exception occured while truncating the file " + e.getMessage());
+    } finally {
+      CarbonUtil.closeStreams(dataOutputStream, dataInputStream);
+    }
+    return fileTruncatedSuccessfully;
+  }
+
+  /**
+   * This method will be used to check whether a file has been modified or not
+   *
+   * @param fileTimeStamp time to be compared with latest timestamp of file
+   * @param endOffset     file length to be compared with current length of file
+   * @return
+   */
+  @Override public boolean isFileModified(long fileTimeStamp, long endOffset) {
+    boolean isFileModified = false;
+    if (getLastModifiedTime() > fileTimeStamp || getSize() > endOffset) {
+      isFileModified = true;
+    }
+    return isFileModified;
+  }
+}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/ce09aaaf/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/AlluxioCarbonFile.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/AlluxioCarbonFile.java b/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/AlluxioCarbonFile.java
new file mode 100644
index 0000000..51fcd53
--- /dev/null
+++ b/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/AlluxioCarbonFile.java
@@ -0,0 +1,130 @@
+/*
+ * 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.datastore.filesystem;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.carbondata.common.logging.LogService;
+import org.apache.carbondata.common.logging.LogServiceFactory;
+import org.apache.carbondata.core.datastore.impl.FileFactory;
+
+import org.apache.hadoop.fs.FileStatus;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hdfs.DistributedFileSystem;
+
+
+
+public class AlluxioCarbonFile extends AbstractDFSCarbonFile {
+  /**
+   * LOGGER
+   */
+  private static final LogService LOGGER =
+      LogServiceFactory.getLogService(AlluxioCarbonFile.class.getName());
+
+  public AlluxioCarbonFile(String filePath) {
+    super(filePath);
+  }
+
+  public AlluxioCarbonFile(Path path) {
+    super(path);
+  }
+
+  public AlluxioCarbonFile(FileStatus fileStatus) {
+    super(fileStatus);
+  }
+
+  /**
+   * @param listStatus
+   * @return
+   */
+  private CarbonFile[] getFiles(FileStatus[] listStatus) {
+    if (listStatus == null) {
+      return new CarbonFile[0];
+    }
+    CarbonFile[] files = new CarbonFile[listStatus.length];
+    for (int i = 0; i < files.length; i++) {
+      files[i] = new AlluxioCarbonFile(listStatus[i]);
+    }
+    return files;
+  }
+
+  @Override
+  public CarbonFile[] listFiles() {
+    FileStatus[] listStatus = null;
+    try {
+      if (null != fileStatus && fileStatus.isDirectory()) {
+        Path path = fileStatus.getPath();
+        listStatus = path.getFileSystem(FileFactory.getConfiguration()).listStatus(path);
+      } else {
+        return null;
+      }
+    } catch (IOException e) {
+      LOGGER.error("Exception occured: " + e.getMessage());
+      return new CarbonFile[0];
+    }
+    return getFiles(listStatus);
+  }
+
+  @Override
+  public CarbonFile[] listFiles(final CarbonFileFilter fileFilter) {
+    CarbonFile[] files = listFiles();
+    if (files != null && files.length >= 1) {
+      List<CarbonFile> fileList = new ArrayList<CarbonFile>(files.length);
+      for (int i = 0; i < files.length; i++) {
+        if (fileFilter.accept(files[i])) {
+          fileList.add(files[i]);
+        }
+      }
+      if (fileList.size() >= 1) {
+        return fileList.toArray(new CarbonFile[fileList.size()]);
+      } else {
+        return new CarbonFile[0];
+      }
+    }
+    return files;
+  }
+
+  @Override
+  public CarbonFile getParentFile() {
+    Path parent = fileStatus.getPath().getParent();
+    return null == parent ? null : new AlluxioCarbonFile(parent);
+  }
+
+  @Override
+  public boolean renameForce(String changetoName) {
+    FileSystem fs;
+    try {
+      fs = fileStatus.getPath().getFileSystem(FileFactory.getConfiguration());
+      if (fs instanceof DistributedFileSystem) {
+        ((DistributedFileSystem) fs).rename(fileStatus.getPath(), new Path(changetoName),
+            org.apache.hadoop.fs.Options.Rename.OVERWRITE);
+        return true;
+      } else {
+        return false;
+      }
+    } catch (IOException e) {
+      LOGGER.error("Exception occured: " + e.getMessage());
+      return false;
+    }
+  }
+}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/ce09aaaf/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/CarbonFile.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/CarbonFile.java b/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/CarbonFile.java
new file mode 100644
index 0000000..a00f633
--- /dev/null
+++ b/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/CarbonFile.java
@@ -0,0 +1,66 @@
+/*
+ * 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.datastore.filesystem;
+
+public interface CarbonFile {
+
+  String getAbsolutePath();
+
+  CarbonFile[] listFiles(CarbonFileFilter fileFilter);
+
+  CarbonFile[] listFiles();
+
+  String getName();
+
+  boolean isDirectory();
+
+  boolean exists();
+
+  String getCanonicalPath();
+
+  CarbonFile getParentFile();
+
+  String getPath();
+
+  long getSize();
+
+  boolean renameTo(String changetoName);
+
+  boolean renameForce(String changetoName);
+
+  boolean delete();
+
+  boolean createNewFile();
+
+  long getLastModifiedTime();
+
+  boolean setLastModifiedTime(long timestamp);
+
+  boolean truncate(String fileName, long validDataEndOffset);
+
+  /**
+   * This method will be used to check whether a file has been modified or not
+   *
+   * @param fileTimeStamp time to be compared with latest timestamp of file
+   * @param endOffset     file length to be compared with current length of file
+   * @return
+   */
+  boolean isFileModified(long fileTimeStamp, long endOffset);
+}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/ce09aaaf/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/CarbonFileFilter.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/CarbonFileFilter.java b/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/CarbonFileFilter.java
new file mode 100644
index 0000000..dc3df36
--- /dev/null
+++ b/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/CarbonFileFilter.java
@@ -0,0 +1,24 @@
+/*
+ * 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.datastore.filesystem;
+
+public interface CarbonFileFilter {
+  boolean accept(CarbonFile file);
+}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/ce09aaaf/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/HDFSCarbonFile.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/HDFSCarbonFile.java b/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/HDFSCarbonFile.java
new file mode 100644
index 0000000..7137087
--- /dev/null
+++ b/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/HDFSCarbonFile.java
@@ -0,0 +1,128 @@
+/*
+ * 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.datastore.filesystem;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.carbondata.common.logging.LogService;
+import org.apache.carbondata.common.logging.LogServiceFactory;
+import org.apache.carbondata.core.datastore.impl.FileFactory;
+
+import org.apache.hadoop.fs.FileStatus;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hdfs.DistributedFileSystem;
+
+public class HDFSCarbonFile extends AbstractDFSCarbonFile {
+  /**
+   * LOGGER
+   */
+  private static final LogService LOGGER =
+      LogServiceFactory.getLogService(HDFSCarbonFile.class.getName());
+
+  public HDFSCarbonFile(String filePath) {
+    super(filePath);
+  }
+
+  public HDFSCarbonFile(Path path) {
+    super(path);
+  }
+
+  public HDFSCarbonFile(FileStatus fileStatus) {
+    super(fileStatus);
+  }
+
+  /**
+   * @param listStatus
+   * @return
+   */
+  private CarbonFile[] getFiles(FileStatus[] listStatus) {
+    if (listStatus == null) {
+      return new CarbonFile[0];
+    }
+    CarbonFile[] files = new CarbonFile[listStatus.length];
+    for (int i = 0; i < files.length; i++) {
+      files[i] = new HDFSCarbonFile(listStatus[i]);
+    }
+    return files;
+  }
+
+  @Override
+  public CarbonFile[] listFiles() {
+    FileStatus[] listStatus = null;
+    try {
+      if (null != fileStatus && fileStatus.isDirectory()) {
+        Path path = fileStatus.getPath();
+        listStatus = path.getFileSystem(FileFactory.getConfiguration()).listStatus(path);
+      } else {
+        return null;
+      }
+    } catch (IOException e) {
+      LOGGER.error("Exception occured: " + e.getMessage());
+      return new CarbonFile[0];
+    }
+    return getFiles(listStatus);
+  }
+
+  @Override
+  public CarbonFile[] listFiles(final CarbonFileFilter fileFilter) {
+    CarbonFile[] files = listFiles();
+    if (files != null && files.length >= 1) {
+      List<CarbonFile> fileList = new ArrayList<CarbonFile>(files.length);
+      for (int i = 0; i < files.length; i++) {
+        if (fileFilter.accept(files[i])) {
+          fileList.add(files[i]);
+        }
+      }
+      if (fileList.size() >= 1) {
+        return fileList.toArray(new CarbonFile[fileList.size()]);
+      } else {
+        return new CarbonFile[0];
+      }
+    }
+    return files;
+  }
+
+  @Override
+  public CarbonFile getParentFile() {
+    Path parent = fileStatus.getPath().getParent();
+    return null == parent ? null : new HDFSCarbonFile(parent);
+  }
+
+  @Override
+  public boolean renameForce(String changetoName) {
+    FileSystem fs;
+    try {
+      fs = fileStatus.getPath().getFileSystem(FileFactory.getConfiguration());
+      if (fs instanceof DistributedFileSystem) {
+        ((DistributedFileSystem) fs).rename(fileStatus.getPath(), new Path(changetoName),
+            org.apache.hadoop.fs.Options.Rename.OVERWRITE);
+        return true;
+      } else {
+        return false;
+      }
+    } catch (IOException e) {
+      LOGGER.error("Exception occured: " + e.getMessage());
+      return false;
+    }
+  }
+}
\ No newline at end of file

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/ce09aaaf/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/LocalCarbonFile.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/LocalCarbonFile.java b/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/LocalCarbonFile.java
new file mode 100644
index 0000000..a6dbfa7
--- /dev/null
+++ b/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/LocalCarbonFile.java
@@ -0,0 +1,229 @@
+/*
+ * 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.datastore.filesystem;
+
+import java.io.File;
+import java.io.FileFilter;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.nio.channels.FileChannel;
+
+import org.apache.carbondata.common.logging.LogService;
+import org.apache.carbondata.common.logging.LogServiceFactory;
+import org.apache.carbondata.core.constants.CarbonCommonConstants;
+import org.apache.carbondata.core.datastore.impl.FileFactory;
+import org.apache.carbondata.core.util.CarbonUtil;
+
+import org.apache.hadoop.fs.Path;
+
+public class LocalCarbonFile implements CarbonFile {
+  private static final LogService LOGGER =
+      LogServiceFactory.getLogService(LocalCarbonFile.class.getName());
+  private File file;
+
+  public LocalCarbonFile(String filePath) {
+    Path pathWithoutSchemeAndAuthority = Path.getPathWithoutSchemeAndAuthority(new Path(filePath));
+    file = new File(pathWithoutSchemeAndAuthority.toString());
+  }
+
+  public LocalCarbonFile(File file) {
+    this.file = file;
+  }
+
+  @Override public String getAbsolutePath() {
+    return file.getAbsolutePath();
+  }
+
+  @Override public CarbonFile[] listFiles(final CarbonFileFilter fileFilter) {
+    if (!file.isDirectory()) {
+      return null;
+    }
+
+    File[] files = file.listFiles(new FileFilter() {
+
+      @Override public boolean accept(File pathname) {
+        return fileFilter.accept(new LocalCarbonFile(pathname));
+      }
+    });
+
+    if (files == null) {
+      return new CarbonFile[0];
+    }
+
+    CarbonFile[] carbonFiles = new CarbonFile[files.length];
+
+    for (int i = 0; i < carbonFiles.length; i++) {
+      carbonFiles[i] = new LocalCarbonFile(files[i]);
+    }
+
+    return carbonFiles;
+  }
+
+  @Override public String getName() {
+    return file.getName();
+  }
+
+  @Override public boolean isDirectory() {
+    return file.isDirectory();
+  }
+
+  @Override public boolean exists() {
+    if (file != null) {
+      return file.exists();
+    }
+    return false;
+  }
+
+  @Override public String getCanonicalPath() {
+    try {
+      return file.getCanonicalPath();
+    } catch (IOException e) {
+      LOGGER
+          .error(e, "Exception occured" + e.getMessage());
+    }
+    return null;
+  }
+
+  @Override public CarbonFile getParentFile() {
+    return new LocalCarbonFile(file.getParentFile());
+  }
+
+  @Override public String getPath() {
+    return file.getPath();
+  }
+
+  @Override public long getSize() {
+    return file.length();
+  }
+
+  public boolean renameTo(String changetoName) {
+    return file.renameTo(new File(changetoName));
+  }
+
+  public boolean delete() {
+    return file.delete();
+  }
+
+  @Override public CarbonFile[] listFiles() {
+
+    if (!file.isDirectory()) {
+      return null;
+    }
+    File[] files = file.listFiles();
+    if (files == null) {
+      return new CarbonFile[0];
+    }
+    CarbonFile[] carbonFiles = new CarbonFile[files.length];
+    for (int i = 0; i < carbonFiles.length; i++) {
+      carbonFiles[i] = new LocalCarbonFile(files[i]);
+    }
+
+    return carbonFiles;
+
+  }
+
+  @Override public boolean createNewFile() {
+    try {
+      return file.createNewFile();
+    } catch (IOException e) {
+      return false;
+    }
+  }
+
+  @Override public long getLastModifiedTime() {
+    return file.lastModified();
+  }
+
+  @Override public boolean setLastModifiedTime(long timestamp) {
+    return file.setLastModified(timestamp);
+  }
+
+  /**
+   * This method will delete the data in file data from a given offset
+   */
+  @Override public boolean truncate(String fileName, long validDataEndOffset) {
+    FileChannel source = null;
+    FileChannel destination = null;
+    boolean fileTruncatedSuccessfully = false;
+    // temporary file name
+    String tempWriteFilePath = fileName + CarbonCommonConstants.TEMPWRITEFILEEXTENSION;
+    FileFactory.FileType fileType = FileFactory.getFileType(fileName);
+    try {
+      CarbonFile tempFile = null;
+      // delete temporary file if it already exists at a given path
+      if (FileFactory.isFileExist(tempWriteFilePath, fileType)) {
+        tempFile = FileFactory.getCarbonFile(tempWriteFilePath, fileType);
+        tempFile.delete();
+      }
+      // create new temporary file
+      FileFactory.createNewFile(tempWriteFilePath, fileType);
+      tempFile = FileFactory.getCarbonFile(tempWriteFilePath, fileType);
+      source = new FileInputStream(fileName).getChannel();
+      destination = new FileOutputStream(tempWriteFilePath).getChannel();
+      long read = destination.transferFrom(source, 0, validDataEndOffset);
+      long totalBytesRead = read;
+      long remaining = validDataEndOffset - totalBytesRead;
+      // read till required data offset is not reached
+      while (remaining > 0) {
+        read = destination.transferFrom(source, totalBytesRead, remaining);
+        totalBytesRead = totalBytesRead + read;
+        remaining = remaining - totalBytesRead;
+      }
+      CarbonUtil.closeStreams(source, destination);
+      // rename the temp file to original file
+      tempFile.renameForce(fileName);
+      fileTruncatedSuccessfully = true;
+    } catch (IOException e) {
+      LOGGER.error("Exception occured while truncating the file " + e.getMessage());
+    } finally {
+      CarbonUtil.closeStreams(source, destination);
+    }
+    return fileTruncatedSuccessfully;
+  }
+
+  /**
+   * This method will be used to check whether a file has been modified or not
+   *
+   * @param fileTimeStamp time to be compared with latest timestamp of file
+   * @param endOffset     file length to be compared with current length of file
+   * @return
+   */
+  @Override public boolean isFileModified(long fileTimeStamp, long endOffset) {
+    boolean isFileModified = false;
+    if (getLastModifiedTime() > fileTimeStamp || getSize() > endOffset) {
+      isFileModified = true;
+    }
+    return isFileModified;
+  }
+
+  @Override public boolean renameForce(String changetoName) {
+    File destFile = new File(changetoName);
+    if (destFile.exists()) {
+      if (destFile.delete()) {
+        return file.renameTo(new File(changetoName));
+      }
+    }
+
+    return file.renameTo(new File(changetoName));
+
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/ce09aaaf/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/ViewFSCarbonFile.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/ViewFSCarbonFile.java b/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/ViewFSCarbonFile.java
new file mode 100644
index 0000000..c7dd192
--- /dev/null
+++ b/core/src/main/java/org/apache/carbondata/core/datastore/filesystem/ViewFSCarbonFile.java
@@ -0,0 +1,126 @@
+/*
+ * 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.datastore.filesystem;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.carbondata.common.logging.LogService;
+import org.apache.carbondata.common.logging.LogServiceFactory;
+import org.apache.carbondata.core.datastore.impl.FileFactory;
+
+import org.apache.hadoop.fs.FileStatus;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.viewfs.ViewFileSystem;
+
+public class ViewFSCarbonFile extends AbstractDFSCarbonFile {
+  /**
+   * LOGGER
+   */
+  private static final LogService LOGGER =
+      LogServiceFactory.getLogService(ViewFSCarbonFile.class.getName());
+
+  public ViewFSCarbonFile(String filePath) {
+    super(filePath);
+  }
+
+  public ViewFSCarbonFile(Path path) {
+    super(path);
+  }
+
+  public ViewFSCarbonFile(FileStatus fileStatus) {
+    super(fileStatus);
+  }
+
+  /**
+   * @param listStatus
+   * @return
+   */
+  private CarbonFile[] getFiles(FileStatus[] listStatus) {
+    if (listStatus == null) {
+      return new CarbonFile[0];
+    }
+    CarbonFile[] files = new CarbonFile[listStatus.length];
+    for (int i = 0; i < files.length; i++) {
+      files[i] = new ViewFSCarbonFile(listStatus[i]);
+    }
+    return files;
+  }
+
+  @Override
+  public CarbonFile[] listFiles() {
+    FileStatus[] listStatus = null;
+    try {
+      if (null != fileStatus && fileStatus.isDirectory()) {
+        Path path = fileStatus.getPath();
+        listStatus = path.getFileSystem(FileFactory.getConfiguration()).listStatus(path);
+      } else {
+        return null;
+      }
+    } catch (IOException ex) {
+      LOGGER.error("Exception occured" + ex.getMessage());
+      return new CarbonFile[0];
+    }
+    return getFiles(listStatus);
+  }
+
+  @Override
+  public CarbonFile[] listFiles(final CarbonFileFilter fileFilter) {
+    CarbonFile[] files = listFiles();
+    if (files != null && files.length >= 1) {
+      List<CarbonFile> fileList = new ArrayList<CarbonFile>(files.length);
+      for (int i = 0; i < files.length; i++) {
+        if (fileFilter.accept(files[i])) {
+          fileList.add(files[i]);
+        }
+      }
+      if (fileList.size() >= 1) {
+        return fileList.toArray(new CarbonFile[fileList.size()]);
+      } else {
+        return new CarbonFile[0];
+      }
+    }
+    return files;
+  }
+
+  @Override public CarbonFile getParentFile() {
+    Path parent = fileStatus.getPath().getParent();
+    return null == parent ? null : new ViewFSCarbonFile(parent);
+  }
+
+  @Override
+  public boolean renameForce(String changetoName) {
+    FileSystem fs;
+    try {
+      fs = fileStatus.getPath().getFileSystem(FileFactory.getConfiguration());
+      if (fs instanceof ViewFileSystem) {
+        fs.delete(new Path(changetoName), true);
+        fs.rename(fileStatus.getPath(), new Path(changetoName));
+        return true;
+      } else {
+        return false;
+      }
+    } catch (IOException e) {
+      LOGGER.error("Exception occured" + e.getMessage());
+      return false;
+    }
+  }
+}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/ce09aaaf/core/src/main/java/org/apache/carbondata/core/datastore/impl/CompressedDataMeasureDataWrapper.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/datastore/impl/CompressedDataMeasureDataWrapper.java b/core/src/main/java/org/apache/carbondata/core/datastore/impl/CompressedDataMeasureDataWrapper.java
new file mode 100644
index 0000000..fe754b1
--- /dev/null
+++ b/core/src/main/java/org/apache/carbondata/core/datastore/impl/CompressedDataMeasureDataWrapper.java
@@ -0,0 +1,37 @@
+/*
+ * 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.datastore.impl;
+
+import org.apache.carbondata.core.datastore.MeasureDataWrapper;
+import org.apache.carbondata.core.datastore.dataholder.CarbonReadDataHolder;
+
+public class CompressedDataMeasureDataWrapper implements MeasureDataWrapper {
+
+  private final CarbonReadDataHolder[] values;
+
+  public CompressedDataMeasureDataWrapper(final CarbonReadDataHolder[] values) {
+    this.values = values;
+  }
+
+  @Override public CarbonReadDataHolder[] getValues() {
+    return values;
+  }
+
+}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/ce09aaaf/core/src/main/java/org/apache/carbondata/core/datastore/impl/DFSFileHolderImpl.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/datastore/impl/DFSFileHolderImpl.java b/core/src/main/java/org/apache/carbondata/core/datastore/impl/DFSFileHolderImpl.java
new file mode 100644
index 0000000..d97cdf3
--- /dev/null
+++ b/core/src/main/java/org/apache/carbondata/core/datastore/impl/DFSFileHolderImpl.java
@@ -0,0 +1,134 @@
+/*
+ * 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.datastore.impl;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import org.apache.carbondata.core.constants.CarbonCommonConstants;
+import org.apache.carbondata.core.datastore.FileHolder;
+
+import org.apache.hadoop.fs.FSDataInputStream;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+
+
+public class DFSFileHolderImpl implements FileHolder {
+  /**
+   * cache to hold filename and its stream
+   */
+  private Map<String, FSDataInputStream> fileNameAndStreamCache;
+
+  public DFSFileHolderImpl() {
+    this.fileNameAndStreamCache =
+        new HashMap<String, FSDataInputStream>(CarbonCommonConstants.DEFAULT_COLLECTION_SIZE);
+  }
+
+  @Override public byte[] readByteArray(String filePath, long offset, int length)
+      throws IOException {
+    FSDataInputStream fileChannel = updateCache(filePath);
+    return read(fileChannel, length, offset);
+  }
+
+  /**
+   * This method will be used to check whether stream is already present in
+   * cache or not for filepath if not present then create it and then add to
+   * cache, other wise get from cache
+   *
+   * @param filePath fully qualified file path
+   * @return channel
+   */
+  private FSDataInputStream updateCache(String filePath) throws IOException {
+    FSDataInputStream fileChannel = fileNameAndStreamCache.get(filePath);
+    if (null == fileChannel) {
+      Path pt = new Path(filePath);
+      FileSystem fs = FileSystem.get(FileFactory.getConfiguration());
+      fileChannel = fs.open(pt);
+      fileNameAndStreamCache.put(filePath, fileChannel);
+    }
+    return fileChannel;
+  }
+
+  /**
+   * This method will be used to read from file based on number of bytes to be read and positon
+   *
+   * @param channel file channel
+   * @param size    number of bytes
+   * @param offset  position
+   * @return byte buffer
+   */
+  private byte[] read(FSDataInputStream channel, int size, long offset) throws IOException {
+    byte[] byteBffer = new byte[size];
+    channel.seek(offset);
+    channel.readFully(byteBffer);
+    return byteBffer;
+  }
+
+  /**
+   * This method will be used to read from file based on number of bytes to be read and positon
+   *
+   * @param channel file channel
+   * @param size    number of bytes
+   * @return byte buffer
+   */
+  private byte[] read(FSDataInputStream channel, int size) throws IOException {
+    byte[] byteBffer = new byte[size];
+    channel.readFully(byteBffer);
+    return byteBffer;
+  }
+
+  @Override public int readInt(String filePath, long offset) throws IOException {
+    FSDataInputStream fileChannel = updateCache(filePath);
+    fileChannel.seek(offset);
+    return fileChannel.readInt();
+  }
+
+  @Override public long readDouble(String filePath, long offset) throws IOException {
+    FSDataInputStream fileChannel = updateCache(filePath);
+    fileChannel.seek(offset);
+    return fileChannel.readLong();
+  }
+
+  @Override public void finish() throws IOException {
+    for (Entry<String, FSDataInputStream> entry : fileNameAndStreamCache.entrySet()) {
+      FSDataInputStream channel = entry.getValue();
+      if (null != channel) {
+        channel.close();
+      }
+    }
+  }
+
+  @Override public byte[] readByteArray(String filePath, int length) throws IOException {
+    FSDataInputStream fileChannel = updateCache(filePath);
+    return read(fileChannel, length);
+  }
+
+  @Override public long readLong(String filePath, long offset) throws IOException {
+    FSDataInputStream fileChannel = updateCache(filePath);
+    fileChannel.seek(offset);
+    return fileChannel.readLong();
+  }
+
+  @Override public int readInt(String filePath) throws IOException {
+    FSDataInputStream fileChannel = updateCache(filePath);
+    return fileChannel.readInt();
+  }
+}

http://git-wip-us.apache.org/repos/asf/incubator-carbondata/blob/ce09aaaf/core/src/main/java/org/apache/carbondata/core/datastore/impl/FileFactory.java
----------------------------------------------------------------------
diff --git a/core/src/main/java/org/apache/carbondata/core/datastore/impl/FileFactory.java b/core/src/main/java/org/apache/carbondata/core/datastore/impl/FileFactory.java
new file mode 100644
index 0000000..db108ed
--- /dev/null
+++ b/core/src/main/java/org/apache/carbondata/core/datastore/impl/FileFactory.java
@@ -0,0 +1,485 @@
+/*
+ * 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.datastore.impl;
+
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.zip.GZIPInputStream;
+
+import org.apache.carbondata.core.datastore.FileHolder;
+import org.apache.carbondata.core.datastore.filesystem.AlluxioCarbonFile;
+import org.apache.carbondata.core.datastore.filesystem.CarbonFile;
+import org.apache.carbondata.core.datastore.filesystem.HDFSCarbonFile;
+import org.apache.carbondata.core.datastore.filesystem.LocalCarbonFile;
+import org.apache.carbondata.core.datastore.filesystem.ViewFSCarbonFile;
+import org.apache.carbondata.core.util.CarbonUtil;
+
+import org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream;
+import org.apache.commons.io.FileUtils;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FSDataInputStream;
+import org.apache.hadoop.fs.FSDataOutputStream;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.io.compress.BZip2Codec;
+import org.apache.hadoop.io.compress.GzipCodec;
+
+public final class FileFactory {
+  private static Configuration configuration = null;
+
+  static {
+    configuration = new Configuration();
+    configuration.addResource(new Path("../core-default.xml"));
+  }
+
+  private FileFactory() {
+
+  }
+
+  public static Configuration getConfiguration() {
+    return configuration;
+  }
+
+  public static FileHolder getFileHolder(FileType fileType) {
+    switch (fileType) {
+      case LOCAL:
+        return new FileHolderImpl();
+      case HDFS:
+      case ALLUXIO:
+      case VIEWFS:
+        return new DFSFileHolderImpl();
+      default:
+        return new FileHolderImpl();
+    }
+  }
+
+  public static FileType getFileType(String path) {
+    if (path.startsWith(CarbonUtil.HDFS_PREFIX)) {
+      return FileType.HDFS;
+    }
+    else if (path.startsWith(CarbonUtil.ALLUXIO_PREFIX)) {
+      return FileType.ALLUXIO;
+    }
+    else if (path.startsWith(CarbonUtil.VIEWFS_PREFIX)) {
+      return FileType.VIEWFS;
+    }
+    return FileType.LOCAL;
+  }
+
+  public static CarbonFile getCarbonFile(String path, FileType fileType) {
+    switch (fileType) {
+      case LOCAL:
+        return new LocalCarbonFile(path);
+      case HDFS:
+        return new HDFSCarbonFile(path);
+      case ALLUXIO:
+        return new AlluxioCarbonFile(path);
+      case VIEWFS:
+        return new ViewFSCarbonFile(path);
+      default:
+        return new LocalCarbonFile(path);
+    }
+  }
+
+  public static DataInputStream getDataInputStream(String path, FileType fileType)
+      throws IOException {
+    return getDataInputStream(path, fileType, -1);
+  }
+
+  public static DataInputStream getDataInputStream(String path, FileType fileType, int bufferSize)
+      throws IOException {
+    path = path.replace("\\", "/");
+    boolean gzip = path.endsWith(".gz");
+    boolean bzip2 = path.endsWith(".bz2");
+    InputStream stream;
+    switch (fileType) {
+      case LOCAL:
+        if (gzip) {
+          stream = new GZIPInputStream(new FileInputStream(path));
+        } else if (bzip2) {
+          stream = new BZip2CompressorInputStream(new FileInputStream(path));
+        } else {
+          stream = new FileInputStream(path);
+        }
+        break;
+      case HDFS:
+      case ALLUXIO:
+      case VIEWFS:
+        Path pt = new Path(path);
+        FileSystem fs = pt.getFileSystem(configuration);
+        if (bufferSize == -1) {
+          stream = fs.open(pt);
+        } else {
+          stream = fs.open(pt, bufferSize);
+        }
+        if (gzip) {
+          GzipCodec codec = new GzipCodec();
+          stream = codec.createInputStream(stream);
+        } else if (bzip2) {
+          BZip2Codec codec = new BZip2Codec();
+          stream = codec.createInputStream(stream);
+        }
+        break;
+      default:
+        throw new UnsupportedOperationException("unsupported file system");
+    }
+    return new DataInputStream(new BufferedInputStream(stream));
+  }
+
+  /**
+   * return the datainputStream which is seek to the offset of file
+   *
+   * @param path
+   * @param fileType
+   * @param bufferSize
+   * @param offset
+   * @return DataInputStream
+   * @throws IOException
+   */
+  public static DataInputStream getDataInputStream(String path, FileType fileType, int bufferSize,
+      long offset) throws IOException {
+    path = path.replace("\\", "/");
+    switch (fileType) {
+      case HDFS:
+      case ALLUXIO:
+      case VIEWFS:
+        Path pt = new Path(path);
+        FileSystem fs = pt.getFileSystem(configuration);
+        FSDataInputStream stream = fs.open(pt, bufferSize);
+        stream.seek(offset);
+        return new DataInputStream(new BufferedInputStream(stream));
+      default:
+        FileInputStream fis = new FileInputStream(path);
+        long actualSkipSize = 0;
+        long skipSize = offset;
+        while (actualSkipSize != offset) {
+          actualSkipSize += fis.skip(skipSize);
+          skipSize = skipSize - actualSkipSize;
+        }
+        return new DataInputStream(new BufferedInputStream(fis));
+    }
+  }
+
+  public static DataOutputStream getDataOutputStream(String path, FileType fileType)
+      throws IOException {
+    path = path.replace("\\", "/");
+    switch (fileType) {
+      case LOCAL:
+        return new DataOutputStream(new BufferedOutputStream(new FileOutputStream(path)));
+      case HDFS:
+      case ALLUXIO:
+      case VIEWFS:
+        Path pt = new Path(path);
+        FileSystem fs = pt.getFileSystem(configuration);
+        FSDataOutputStream stream = fs.create(pt, true);
+        return stream;
+      default:
+        return new DataOutputStream(new BufferedOutputStream(new FileOutputStream(path)));
+    }
+  }
+
+  public static DataOutputStream getDataOutputStream(String path, FileType fileType, int bufferSize,
+      boolean append) throws IOException {
+    path = path.replace("\\", "/");
+    switch (fileType) {
+      case LOCAL:
+        return new DataOutputStream(
+            new BufferedOutputStream(new FileOutputStream(path, append), bufferSize));
+      case HDFS:
+      case ALLUXIO:
+      case VIEWFS:
+        Path pt = new Path(path);
+        FileSystem fs = pt.getFileSystem(configuration);
+        FSDataOutputStream stream = null;
+        if (append) {
+          // append to a file only if file already exists else file not found
+          // exception will be thrown by hdfs
+          if (CarbonUtil.isFileExists(path)) {
+            stream = fs.append(pt, bufferSize);
+          } else {
+            stream = fs.create(pt, true, bufferSize);
+          }
+        } else {
+          stream = fs.create(pt, true, bufferSize);
+        }
+        return stream;
+      default:
+        return new DataOutputStream(
+            new BufferedOutputStream(new FileOutputStream(path), bufferSize));
+    }
+  }
+
+  public static DataOutputStream getDataOutputStream(String path, FileType fileType, int bufferSize,
+      long blockSize) throws IOException {
+    path = path.replace("\\", "/");
+    switch (fileType) {
+      case LOCAL:
+        return new DataOutputStream(
+            new BufferedOutputStream(new FileOutputStream(path), bufferSize));
+      case HDFS:
+      case ALLUXIO:
+      case VIEWFS:
+        Path pt = new Path(path);
+        FileSystem fs = pt.getFileSystem(configuration);
+        FSDataOutputStream stream =
+            fs.create(pt, true, bufferSize, fs.getDefaultReplication(pt), blockSize);
+        return stream;
+      default:
+        return new DataOutputStream(
+            new BufferedOutputStream(new FileOutputStream(path), bufferSize));
+    }
+  }
+
+  /**
+   * This method checks the given path exists or not and also is it file or
+   * not if the performFileCheck is true
+   *
+   * @param filePath         - Path
+   * @param fileType         - FileType Local/HDFS
+   * @param performFileCheck - Provide false for folders, true for files and
+   */
+  public static boolean isFileExist(String filePath, FileType fileType, boolean performFileCheck)
+      throws IOException {
+    filePath = filePath.replace("\\", "/");
+    switch (fileType) {
+      case HDFS:
+      case ALLUXIO:
+      case VIEWFS:
+        Path path = new Path(filePath);
+        FileSystem fs = path.getFileSystem(configuration);
+        if (performFileCheck) {
+          return fs.exists(path) && fs.isFile(path);
+        } else {
+          return fs.exists(path);
+        }
+
+      case LOCAL:
+      default:
+        File defaultFile = new File(filePath);
+
+        if (performFileCheck) {
+          return defaultFile.exists() && defaultFile.isFile();
+        } else {
+          return defaultFile.exists();
+        }
+    }
+  }
+
+  /**
+   * This method checks the given path exists or not and also is it file or
+   * not if the performFileCheck is true
+   *
+   * @param filePath - Path
+   * @param fileType - FileType Local/HDFS
+   */
+  public static boolean isFileExist(String filePath, FileType fileType) throws IOException {
+    filePath = filePath.replace("\\", "/");
+    switch (fileType) {
+      case HDFS:
+      case ALLUXIO:
+      case VIEWFS:
+        Path path = new Path(filePath);
+        FileSystem fs = path.getFileSystem(configuration);
+        return fs.exists(path);
+
+      case LOCAL:
+      default:
+        File defaultFile = new File(filePath);
+        return defaultFile.exists();
+    }
+  }
+
+  public static boolean createNewFile(String filePath, FileType fileType) throws IOException {
+    filePath = filePath.replace("\\", "/");
+    switch (fileType) {
+      case HDFS:
+      case ALLUXIO:
+      case VIEWFS:
+        Path path = new Path(filePath);
+        FileSystem fs = path.getFileSystem(configuration);
+        return fs.createNewFile(path);
+
+      case LOCAL:
+      default:
+        File file = new File(filePath);
+        return file.createNewFile();
+    }
+  }
+
+  public static boolean deleteFile(String filePath, FileType fileType) throws IOException {
+    filePath = filePath.replace("\\", "/");
+    switch (fileType) {
+      case HDFS:
+      case ALLUXIO:
+      case VIEWFS:
+        Path path = new Path(filePath);
+        FileSystem fs = path.getFileSystem(configuration);
+        return fs.delete(path, true);
+
+      case LOCAL:
+      default:
+        File file = new File(filePath);
+        return deleteAllFilesOfDir(file);
+    }
+  }
+
+  public static boolean deleteAllFilesOfDir(File path) {
+    if (!path.exists()) {
+      return true;
+    }
+    if (path.isFile()) {
+      return path.delete();
+    }
+    File[] files = path.listFiles();
+    for (int i = 0; i < files.length; i++) {
+      deleteAllFilesOfDir(files[i]);
+    }
+    return path.delete();
+  }
+
+  public static boolean mkdirs(String filePath, FileType fileType) throws IOException {
+    filePath = filePath.replace("\\", "/");
+    switch (fileType) {
+      case HDFS:
+      case ALLUXIO:
+      case VIEWFS:
+        Path path = new Path(filePath);
+        FileSystem fs = path.getFileSystem(configuration);
+        return fs.mkdirs(path);
+      case LOCAL:
+      default:
+        File file = new File(filePath);
+        return file.mkdirs();
+    }
+  }
+
+  /**
+   * for getting the dataoutput stream using the hdfs filesystem append API.
+   *
+   * @param path
+   * @param fileType
+   * @return
+   * @throws IOException
+   */
+  public static DataOutputStream getDataOutputStreamUsingAppend(String path, FileType fileType)
+      throws IOException {
+    path = path.replace("\\", "/");
+    switch (fileType) {
+      case LOCAL:
+        return new DataOutputStream(new BufferedOutputStream(new FileOutputStream(path, true)));
+      case HDFS:
+      case ALLUXIO:
+      case VIEWFS:
+        Path pt = new Path(path);
+        FileSystem fs = pt.getFileSystem(configuration);
+        FSDataOutputStream stream = fs.append(pt);
+        return stream;
+      default:
+        return new DataOutputStream(new BufferedOutputStream(new FileOutputStream(path)));
+    }
+  }
+
+  /**
+   * for creating a new Lock file and if it is successfully created
+   * then in case of abrupt shutdown then the stream to that file will be closed.
+   *
+   * @param filePath
+   * @param fileType
+   * @return
+   * @throws IOException
+   */
+  public static boolean createNewLockFile(String filePath, FileType fileType) throws IOException {
+    filePath = filePath.replace("\\", "/");
+    switch (fileType) {
+      case HDFS:
+      case ALLUXIO:
+      case VIEWFS:
+        Path path = new Path(filePath);
+        FileSystem fs = path.getFileSystem(configuration);
+        if (fs.createNewFile(path)) {
+          fs.deleteOnExit(path);
+          return true;
+        }
+        return false;
+      case LOCAL:
+      default:
+        File file = new File(filePath);
+        return file.createNewFile();
+    }
+  }
+
+  public enum FileType {
+    LOCAL, HDFS, ALLUXIO, VIEWFS
+  }
+
+  /**
+   * below method will be used to update the file path
+   * for local type
+   * it removes the file:/ from the path
+   *
+   * @param filePath
+   * @return updated file path without url for local
+   */
+  public static String getUpdatedFilePath(String filePath) {
+    FileType fileType = getFileType(filePath);
+    switch (fileType) {
+      case HDFS:
+      case ALLUXIO:
+      case VIEWFS:
+        return filePath;
+      case LOCAL:
+      default:
+        Path pathWithoutSchemeAndAuthority =
+            Path.getPathWithoutSchemeAndAuthority(new Path(filePath));
+        return pathWithoutSchemeAndAuthority.toString();
+    }
+  }
+
+  /**
+   * It computes size of directory
+   *
+   * @param filePath
+   * @return size in bytes
+   * @throws IOException
+   */
+  public static long getDirectorySize(String filePath) throws IOException {
+    FileType fileType = getFileType(filePath);
+    switch (fileType) {
+      case HDFS:
+      case ALLUXIO:
+      case VIEWFS:
+        Path path = new Path(filePath);
+        FileSystem fs = path.getFileSystem(configuration);
+        return fs.getContentSummary(path).getLength();
+      case LOCAL:
+      default:
+        File file = new File(filePath);
+        return FileUtils.sizeOfDirectory(file);
+    }
+  }
+
+}


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