net.percederberg.mibble.value

## Class NullValue

- java.lang.Object
- - net.percederberg.mibble.MibValue
  - - net.percederberg.mibble.value.NullValue

- All Implemented Interfaces:
    java.lang.Comparable<java.lang.Object>

      public class NullValue
      extends MibValue

  A null MIB value.
  Since:
    2.0

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static NullValue` | `NULL` The one a only null value instance.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `int` | `compareTo(java.lang.Object obj)` Compares this object with the specified object for order.
    `MibValue` | `createReference()` Creates a value reference to this value.
    `boolean` | `equals(java.lang.Object obj)` Checks if this object equals another object.
    `int` | `hashCode()` Returns a hash code for this object.
    `MibValue` | `initialize(MibLoaderLog log, MibType type)` Initializes the MIB value.
    `java.lang.Object` | `toObject()` Returns a Java null representation of this value.
    `java.lang.String` | `toString()` Returns a string representation of this value.

    - ### Methods inherited from class net.percederberg.mibble.MibValue

      `clear, getName, getReferenceSymbol, isReferenceTo, isReferenceTo, setReferenceSymbol`

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

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

- - ### Field Detail

    - #### NULL

          public static final NullValue NULL

      The one a only null value instance.

  - ### Method Detail

    - #### initialize

          public MibValue initialize(MibLoaderLog log,
                            MibType type)

      Initializes the MIB value. This will remove all levels of indirection present, such as references to other values. No value information is lost by this operation. This method may modify this object as a side-effect, and will return the basic value.

      NOTE: This is an internal method that should only be called by the MIB loader.

      Specified by:
        `initialize` in class `MibValue`
      Parameters:
        `log` - the MIB loader log
        `type` - the value type
      Returns:
        the basic MIB value

    - #### createReference

          public MibValue createReference()

      Creates a value reference to this value. The value reference is normally an identical value. Only certain values support being referenced, and the default implementation of this method throws an exception.

      NOTE: This is an internal method that should only be called by the MIB loader.

      Overrides:
        `createReference` in class `MibValue`
      Returns:
        the MIB value reference
      Since:
        2.2

    - #### compareTo

          public int compareTo(java.lang.Object obj)

      Compares this object with the specified object for order. This method will only compare the string representations with each other.
      Parameters:
        `obj` - the object to compare to
      Returns:
        less than zero if this object is less than the specified, zero if the objects are equal, or greater than zero otherwise
      Since:
        2.6

    - #### equals

          public boolean equals(java.lang.Object obj)

      Checks if this object equals another object. This method will compare the string representations for equality.
      Overrides:
        `equals` in class `java.lang.Object`
      Parameters:
        `obj` - the object to compare with
      Returns:
        true if the objects are equal, or false otherwise
      Since:
        2.6

    - #### hashCode

          public int hashCode()

      Returns a hash code for this object.
      Overrides:
        `hashCode` in class `java.lang.Object`
      Returns:
        a hash code for this object
      Since:
        2.6

    - #### toObject

          public java.lang.Object toObject()

      Returns a Java null representation of this value.
      Specified by:
        `toObject` in class `MibValue`
      Returns:
        a Java null representation of this value

    - #### toString

          public java.lang.String toString()

      Returns a string representation of this value.
      Overrides:
        `toString` in class `java.lang.Object`
      Returns:
        a string representation of this value