demo.dynamic
Class NullTag

java.lang.Object
  |
  +--demo.dynamic.NullTag

All Implemented Interfaces:

DDTag, QuickSerializable

public class NullTag

extends Object

implements DDTag

NullTag is the DDTag for objects that otherwise do not have an identifier. This class replaces setting ttag==null.

Version:

$Id: NullTag.java,v 1.1 2004/05/03 09:03:28 hweather Exp $

Author:

Hakim Weatherspoon

See Also:

NullTagQuery, DDTag

Constructor Summary

NullTag()
Constructor: Creates a new NullTag.

NullTag(InputBuffer buffer)
Constructs a NullTag from its serialized form.

Method Summary

boolean	equals(Object other) Compares this NullTag with another tag, and returns true iff they are the same type of tag.
int	hashCode() Calculates a Java hash code for this NullTag object (by returning its type_code)
void	serialize(OutputBuffer buffer) Specified by ostore.util.QuickSerializable
String	toString() Specified by java.lang.Object

Methods inherited from class java.lang.Object

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

Constructor Detail

NullTag

public NullTag()

Constructor: Creates a new NullTag.

NullTag

public NullTag(InputBuffer buffer)
        throws QSException

Constructs a NullTag from its serialized form.

Parameters:

buffer - serialized form of object.

Method Detail

serialize

public void serialize(OutputBuffer buffer)

Specified by ostore.util.QuickSerializable

Specified by:

serialize in interface QuickSerializable

equals

public boolean equals(Object other)

Compares this NullTag with another tag, and returns true iff they are the same type of tag.

Overrides:

equals in class Object

Parameters:

other - the object with which to compare this NullTag.

Returns:

true iff this and other are instanceof NullTag.

hashCode

public int hashCode()

Calculates a Java hash code for this NullTag object (by returning its type_code)

Overrides:

hashCode in class Object

Returns:

the Java hash code for this NullTag.

toString

public String toString()

Specified by java.lang.Object

Overrides:

toString in class Object