Package org.apache.hadoop.hbase

Class PrivateCellUtil.EmptyCell

java.lang.Object
org.apache.hadoop.hbase.PrivateCellUtil.EmptyCell
All Implemented Interfaces:
Cell, ExtendedCell, HeapSize, RawCell
Direct Known Subclasses:
PrivateCellUtil.FirstOnRowCell, PrivateCellUtil.FirstOnRowDeleteFamilyCell, PrivateCellUtil.LastOnRowCell
Enclosing class:
PrivateCellUtil
private abstract static class PrivateCellUtil.EmptyCell extends Object implements ExtendedCell
These cells are used in reseeks/seeks to improve the read performance. They are not real cells that are returned back to the clients

  • Constructor Details

  • Method Details

    • setSequenceId

      public void setSequenceId(long seqId)
      Description copied from interface: ExtendedCell
      Sets with the given seqId.
      Specified by:
      setSequenceId in interface ExtendedCell
      Parameters:
      seqId - sequence ID

    • setTimestamp

      public void setTimestamp(long ts)
      Description copied from interface: ExtendedCell
      Sets with the given timestamp.
      Specified by:
      setTimestamp in interface ExtendedCell
      Parameters:
      ts - timestamp

    • setTimestamp

      public void setTimestamp(byte[] ts)
      Description copied from interface: ExtendedCell
      Sets with the given timestamp.
      Specified by:
      setTimestamp in interface ExtendedCell
      Parameters:
      ts - buffer containing the timestamp value

    • getRowArray

      public byte[] getRowArray()
      Description copied from interface: Cell
      Contiguous raw bytes that may start at any index in the containing array. Max length is Short.MAX_VALUE which is 32,767 bytes.
      Specified by:
      getRowArray in interface Cell
      Returns:
      The array containing the row bytes.

    • getRowOffset

      public int getRowOffset()
      Description copied from interface: Cell
      Returns Array index of first row byte
      Specified by:
      getRowOffset in interface Cell

    • getRowLength

      public short getRowLength()
      Description copied from interface: Cell
      Returns Number of row bytes. Must be < rowArray.length - offset.
      Specified by:
      getRowLength in interface Cell

    • getFamilyArray

      public byte[] getFamilyArray()
      Description copied from interface: Cell
      Contiguous bytes composed of legal HDFS filename characters which may start at any index in the containing array. Max length is Byte.MAX_VALUE, which is 127 bytes.
      Specified by:
      getFamilyArray in interface Cell
      Returns:
      the array containing the family bytes.

    • getFamilyOffset

      public int getFamilyOffset()
      Description copied from interface: Cell
      Returns Array index of first family byte
      Specified by:
      getFamilyOffset in interface Cell

    • getFamilyLength

      public byte getFamilyLength()
      Description copied from interface: Cell
      Returns Number of family bytes. Must be < familyArray.length - offset.
      Specified by:
      getFamilyLength in interface Cell

    • getQualifierArray

      public byte[] getQualifierArray()
      Description copied from interface: Cell
      Contiguous raw bytes that may start at any index in the containing array.
      Specified by:
      getQualifierArray in interface Cell
      Returns:
      The array containing the qualifier bytes.

    • getQualifierOffset

      public int getQualifierOffset()
      Description copied from interface: Cell
      Returns Array index of first qualifier byte
      Specified by:
      getQualifierOffset in interface Cell

    • getQualifierLength

      public int getQualifierLength()
      Description copied from interface: Cell
      Returns Number of qualifier bytes. Must be < qualifierArray.length - offset.
      Specified by:
      getQualifierLength in interface Cell

    • getSequenceId

      public long getSequenceId()
      Description copied from interface: ExtendedCell
      A region-specific unique monotonically increasing sequence ID given to each Cell. It always exists for cells in the memstore but is not retained forever. It will be kept for HConstants.KEEP_SEQID_PERIOD days, but generally becomes irrelevant after the cell's row is no longer involved in any operations that require strict consistency.
      Specified by:
      getSequenceId in interface Cell
      Specified by:
      getSequenceId in interface ExtendedCell
      Returns:
      seqId (always > 0 if exists), or 0 if it no longer exists

    • getValueArray

      public byte[] getValueArray()
      Description copied from interface: Cell
      Contiguous raw bytes that may start at any index in the containing array. Max length is Integer.MAX_VALUE which is 2,147,483,647 bytes.
      Specified by:
      getValueArray in interface Cell
      Returns:
      The array containing the value bytes.

    • getValueOffset

      public int getValueOffset()
      Description copied from interface: Cell
      Returns Array index of first value byte
      Specified by:
      getValueOffset in interface Cell

    • getValueLength

      public int getValueLength()
      Description copied from interface: Cell
      Returns Number of value bytes. Must be < valueArray.length - offset.
      Specified by:
      getValueLength in interface Cell

    • getTagsArray

      public byte[] getTagsArray()
      Description copied from interface: ExtendedCell
      Contiguous raw bytes representing tags that may start at any index in the containing array.
      Specified by:
      getTagsArray in interface Cell
      Specified by:
      getTagsArray in interface ExtendedCell
      Returns:
      the tags byte array

    • getTagsOffset

      public int getTagsOffset()
      Description copied from interface: ExtendedCell
      Returns the first offset where the tags start in the Cell
      Specified by:
      getTagsOffset in interface Cell
      Specified by:
      getTagsOffset in interface ExtendedCell

    • getTagsLength

      public int getTagsLength()
      Description copied from interface: ExtendedCell
      HBase internally uses 2 bytes to store tags length in Cell. As the tags length is always a non-negative number, to make good use of the sign bit, the max of tags length is defined 2 * Short.MAX_VALUE + 1 = 65535. As a result, the return type is int, because a short is not capable of handling that. Please note that even if the return type is int, the max tags length is far less than Integer.MAX_VALUE.
      Specified by:
      getTagsLength in interface Cell
      Specified by:
      getTagsLength in interface ExtendedCell
      Returns:
      the total length of the tags in the Cell.