Class Union4<A,B,C,D>

java.lang.Object
org.apache.hadoop.hbase.types.Union2<A,B>
org.apache.hadoop.hbase.types.Union3<A,B,C>
org.apache.hadoop.hbase.types.Union4<A,B,C,D>
All Implemented Interfaces:
DataType<Object>

@Public public abstract class Union4<A,B,C,D> extends Union3<A,B,C>
The Union family of DataTypes encode one of a fixed collection of Objects. They provide convenience methods which handle type casting on your behalf.
  • Field Details

  • Constructor Details

  • Method Details

    • isOrderPreserving

      public boolean isOrderPreserving()
      Description copied from interface: DataType
      Indicates whether this instance writes encoded byte[]'s which preserve the natural sort order of the unencoded value.
      Specified by:
      isOrderPreserving in interface DataType<A>
      Overrides:
      isOrderPreserving in class Union3<A,B,C>
      Returns:
      true when natural order is preserved, false otherwise.
    • getOrder

      public Order getOrder()
      Description copied from interface: DataType
      Retrieve the sort Order imposed by this data type, or null when natural ordering is not preserved. Value is either ascending or descending. Default is assumed to be Order.ASCENDING.
      Specified by:
      getOrder in interface DataType<A>
      Overrides:
      getOrder in class Union3<A,B,C>
    • isNullable

      public boolean isNullable()
      Description copied from interface: DataType
      Indicates whether this instance supports encoding null values. This depends on the implementation details of the encoding format. All DataTypes that support null should treat null as comparing less than any non-null value for default sort ordering purposes.
      Specified by:
      isNullable in interface DataType<A>
      Overrides:
      isNullable in class Union3<A,B,C>
      Returns:
      true when null is supported, false otherwise.
    • isSkippable

      public boolean isSkippable()
      Description copied from interface: DataType
      Indicates whether this instance is able to skip over it's encoded value. DataTypes that are not skippable can only be used as the right-most field of a Struct.
      Specified by:
      isSkippable in interface DataType<A>
      Overrides:
      isSkippable in class Union3<A,B,C>
    • decodeD

      Read an instance of the fourth type parameter from buffer src.