EmptyType (apache-cassandra API)
Date: 2014-10-21

org.apache.cassandra.db.marshal

## Class EmptyType

- java.lang.Object
- - org.apache.cassandra.db.marshal.AbstractType<java.lang.Void>
  - - org.apache.cassandra.db.marshal.EmptyType

- All Implemented Interfaces:
    java.util.Comparator<java.nio.ByteBuffer>

      public class EmptyType
      extends AbstractType<java.lang.Void>

  A type that only accept empty data. It is only useful as a value validation type, not as a comparator since column names can't be empty.

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static EmptyType` | `instance`

    - ### Fields inherited from class org.apache.cassandra.db.marshal.AbstractType

      `reverseComparator`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `int` | `compare(java.nio.ByteBuffer o1, java.nio.ByteBuffer o2)`
    `java.nio.ByteBuffer` | `fromString(java.lang.String source)` get a byte representation of the given string.
    `TypeSerializer<java.lang.Void>` | `getSerializer()`
    `java.lang.String` | `getString(java.nio.ByteBuffer bytes)` get a string representation of the bytes suitable for log messages

    - ### Methods inherited from class org.apache.cassandra.db.marshal.AbstractType

      `asCQL3Type, compareCollectionMembers, componentsCount, compose, decompose, fromStringCQL2, getComponents, getString, isByteOrderComparable, isCollection, isCompatibleWith, isCounter, isValueCompatibleWith, isValueCompatibleWithInternal, parseDefaultParameters, toString, validate, validateCellValue, validateCollectionMember`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

    - ### Methods inherited from interface java.util.Comparator

      `equals`

- - ### Field Detail

    - #### instance

          public static final EmptyType instance

  - ### Method Detail

    - #### compare

          public int compare(java.nio.ByteBuffer o1,
                    java.nio.ByteBuffer o2)

    - #### getString

          public java.lang.String getString(java.nio.ByteBuffer bytes)

      Description copied from class: `AbstractType`
      get a string representation of the bytes suitable for log messages
      Overrides:
        `getString` in class `AbstractType<java.lang.Void>`

    - #### fromString

          public java.nio.ByteBuffer fromString(java.lang.String source)
                                         throws MarshalException

      Description copied from class: `AbstractType`
      get a byte representation of the given string.
      Specified by:
        `fromString` in class `AbstractType<java.lang.Void>`
      Throws:
        `MarshalException`

    - #### getSerializer

          public TypeSerializer<java.lang.Void> getSerializer()

      Specified by:
        `getSerializer` in class `AbstractType<java.lang.Void>`

Copyright © 2014 The Apache Software Foundation