net.ontopia.persistence.query.sql
Class SQLIsNull

java.lang.Object
  net.ontopia.persistence.query.sql.SQLIsNull

All Implemented Interfaces:

SQLExpressionIF

public class SQLIsNull
extends java.lang.Object
implements SQLExpressionIF

INTERNAL: SQL condition: is null

A NULL condition tests for nulls.

Field Summary

protected SQLValueIF

value

Fields inherited from interface net.ontopia.persistence.query.sql.SQLExpressionIF

AND, EQUALS, EXISTS, FALSE, IN, IS_NULL, JOIN, LIKE, NOT, NOT_EQUALS, OR, SET_OPERATION, VALUE_EXPRESSION, VERBATIM

Constructor Summary

SQLIsNull(SQLValueIF value)

Method Summary

int	getType() INTERNAL: Returns the expression type.
SQLValueIF	getValue()
void	setValue(SQLValueIF value)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

value

protected SQLValueIF value

Constructor Detail

SQLIsNull

public SQLIsNull(SQLValueIF value)

Method Detail

getType

public int getType()

Description copied from interface: SQLExpressionIF

INTERNAL: Returns the expression type. The type is represented by one of the constants in the SQLExpressionIF interface.

Specified by:

getType in interface SQLExpressionIF

getValue

public SQLValueIF getValue()

setValue

public void setValue(SQLValueIF value)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object