net.ontopia.persistence.query.jdo
Class JDOIsEmpty

java.lang.Object
  net.ontopia.persistence.query.jdo.JDOIsEmpty

All Implemented Interfaces:

JDOExpressionIF

public class JDOIsEmpty
extends java.lang.Object
implements JDOExpressionIF

INTERNAL: JDOQL method: Collection.isEmpty(). Syntax: 'A.isEmpty()'.

Field Summary

protected JDOValueIF

value

Fields inherited from interface net.ontopia.persistence.query.jdo.JDOExpressionIF

AND, BOOLEAN, CONTAINS, ENDS_WITH, EQUALS, IS_EMPTY, LIKE, NOT, NOT_EQUALS, OR, SET_OPERATION, STARTS_WITH, VALUE_EXPRESSION

Constructor Summary

JDOIsEmpty(JDOField value)

JDOIsEmpty(JDOValueIF value)

Method Summary

boolean	equals(java.lang.Object obj)
int	getType() INTERNAL: Returns the type of JDO expression indicated by one of the constants in the JDOExpressionIF interface.
JDOValueIF	getValue()
int	hashCode()
java.lang.String	toString()
void	visit(JDOVisitorIF visitor) INTERNAL: Allows the value to be visited.

Methods inherited from class java.lang.Object

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

Field Detail

value

protected JDOValueIF value

Constructor Detail

JDOIsEmpty

public JDOIsEmpty(JDOField value)

JDOIsEmpty

public JDOIsEmpty(JDOValueIF value)

Method Detail

getType

public int getType()

Description copied from interface: JDOExpressionIF

INTERNAL: Returns the type of JDO expression indicated by one of the constants in the JDOExpressionIF interface.

Specified by:

getType in interface JDOExpressionIF

getValue

public JDOValueIF getValue()

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

visit

public void visit(JDOVisitorIF visitor)

Description copied from interface: JDOExpressionIF

INTERNAL: Allows the value to be visited. This method is used for retrieval of nested data in expressions.

Specified by:

visit in interface JDOExpressionIF