Package org.apache.hadoop.io

Class EnumSetWritable<E extends Enum<E>>

java.lang.Object
java.util.AbstractCollection<E>
org.apache.hadoop.io.EnumSetWritable<E>
All Implemented Interfaces:
Iterable<E>, Collection<E>, Configurable, Writable
@Public @Stable public class EnumSetWritable<E extends Enum<E>> extends AbstractCollection<E> implements Writable, Configurable
A Writable wrapper for EnumSet.

  • Constructor Details

    • EnumSetWritable

      public EnumSetWritable(EnumSet<E> value, Class<E> elementType)
      Construct a new EnumSetWritable. If the value argument is null or its size is zero, the elementType argument must not be null. If the argument value's size is bigger than zero, the argument elementType is not be used.
      Parameters:
      value - enumSet value.
      elementType - elementType.

    • EnumSetWritable

      public EnumSetWritable(EnumSet<E> value)
      Construct a new EnumSetWritable. Argument value should not be null or empty.
      Parameters:
      value - enumSet value.

  • Method Details

    • iterator

      public Iterator<E> iterator()
      Specified by:
      iterator in interface Collection<E extends Enum<E>>
      Specified by:
      iterator in interface Iterable<E extends Enum<E>>
      Specified by:
      iterator in class AbstractCollection<E extends Enum<E>>

    • size

      public int size()
      Specified by:
      size in interface Collection<E extends Enum<E>>
      Specified by:
      size in class AbstractCollection<E extends Enum<E>>

    • add

      public boolean add(E e)
      Specified by:
      add in interface Collection<E extends Enum<E>>
      Overrides:
      add in class AbstractCollection<E extends Enum<E>>

    • set

      public void set(EnumSet<E> value, Class<E> elementType)
      reset the EnumSetWritable with specified value and elementType. If the value argument is null or its size is zero, the elementType argument must not be null. If the argument value's size is bigger than zero, the argument elementType is not be used.
      Parameters:
      value - enumSet Value.
      elementType - elementType.

    • get

      public EnumSet<E> get()
      Return the value of this EnumSetWritable.
      Returns:
      EnumSet.

    • readFields

      public void readFields(DataInput in) throws IOException
      Description copied from interface: Writable
      Deserialize the fields of this object from in.

      For efficiency, implementations should attempt to re-use storage in the existing object where possible.

      Specified by:
      readFields in interface Writable
      Parameters:
      in - DataInput to deseriablize this object from.
      Throws:
      IOException - any other problem for readFields.

    • write

      public void write(DataOutput out) throws IOException
      Description copied from interface: Writable
      Serialize the fields of this object to out.
      Specified by:
      write in interface Writable
      Parameters:
      out - DataOuput to serialize this object into.
      Throws:
      IOException - any other problem for write.

    • equals

      public boolean equals(Object o)
      Returns true if o is an EnumSetWritable with the same value, or both are null.
      Specified by:
      equals in interface Collection<E extends Enum<E>>
      Overrides:
      equals in class Object

    • getElementType

      public Class<E> getElementType()
      Returns the class of all the elements of the underlying EnumSetWriable. It may return null.
      Returns:
      the element class

    • hashCode

      public int hashCode()
      Specified by:
      hashCode in interface Collection<E extends Enum<E>>
      Overrides:
      hashCode in class Object

    • toString

      public String toString()
      Overrides:
      toString in class AbstractCollection<E extends Enum<E>>

    • getConf

      public Configuration getConf()
      Description copied from interface: Configurable
      Return the configuration used by this object.
      Specified by:
      getConf in interface Configurable
      Returns:
      Configuration

    • setConf

      public void setConf(Configuration conf)
      Description copied from interface: Configurable
      Set the configuration to be used by this object.
      Specified by:
      setConf in interface Configurable
      Parameters:
      conf - configuration to be used