org.caleigo.core
Class NegateQualifier

java.lang.Object
  org.caleigo.core.Qualifier
      org.caleigo.core.NegateQualifier

All Implemented Interfaces:

java.io.Serializable

public class NegateQualifier

extends Qualifier

The NegateQualifier logically negates another single qualifier that may however be a CompositeQualifier. This would represent adding a "NOT" before the contained Qualifier.

Version:

1.00

Author:

Dennis Zikovic

See Also:

Serialized Form

Nested Class Summary

Nested classes inherited from class org.caleigo.core.Qualifier

Qualifier.RelayListener

Constructor Summary

NegateQualifier(Qualifier entityQualifier)
Default constructor for NegateQualifier.

Method Summary

void	addQualifierListener(IQualifierListener listener) Adds an IQualifierListener to receive notifications of contents and structure changes from the Qualifier object.
boolean	canDirectlyQualify(IEntityDescriptor entityDescriptor) This abstract method must return true if the qualifier can select entities of the type defined by the provided entity descriptor without the nead of any complementary data.
boolean	canQualify(IEntityDescriptor entityDescriptor) This method returns true if the qualifier can select entities of the type defined by the provided entity descriptor.
boolean	canUniquelyQualify(IEntityDescriptor entityDescriptor) This method returns true if the qualifier can uniquely select entities of the type defined by the provided entity descriptor.
boolean	doesQualify(IEntity entity) This method returns true if the qualifier does select the provided entity object.
Qualifier	getNegatedQualifier() Access method that returns the wrapped contained qualifier that are defined as negated by the called Qualifier.
java.lang.String	toString() The toString method returns an "abstract" expression of what the qualifier selects.

Methods inherited from class org.caleigo.core.Qualifier

and, and, and, combine, create, create, fireContentChangedEvent, fireQualifierEvent, fireStructureChangedEvent, negate, or, or, or, removeQualifierListener

Methods inherited from class java.lang.Object

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

Constructor Detail

NegateQualifier

public NegateQualifier(Qualifier entityQualifier)

Default constructor for NegateQualifier.

Method Detail

doesQualify

public boolean doesQualify(IEntity entity)

This method returns true if the qualifier does select the provided entity object.

Specified by:

doesQualify in class Qualifier

canQualify

public boolean canQualify(IEntityDescriptor entityDescriptor)

This method returns true if the qualifier can select entities of the type defined by the provided entity descriptor.

Specified by:

canQualify in class Qualifier

canUniquelyQualify

public boolean canUniquelyQualify(IEntityDescriptor entityDescriptor)

This method returns true if the qualifier can uniquely select entities of the type defined by the provided entity descriptor. If that is the case then the qualifier is an identity qualifier and can never qualify more then a single entity instance of the specified type.

Specified by:

canUniquelyQualify in class Qualifier

canDirectlyQualify

public boolean canDirectlyQualify(IEntityDescriptor entityDescriptor)

This abstract method must return true if the qualifier can select entities of the type defined by the provided entity descriptor without the nead of any complementary data. No other information than can be accessed through the provided entity descriptor should be neaded if this method returns true. This validates that the doesQualify method can be called for the called qualifier.

Specified by:

canDirectlyQualify in class Qualifier

addQualifierListener

public void addQualifierListener(IQualifierListener listener)

Adds an IQualifierListener to receive notifications of contents and structure changes from the Qualifier object. The NegateQualifier overrides this method to know when to listen on the negated qualifier.

Overrides:

addQualifierListener in class Qualifier

toString

public java.lang.String toString()

The toString method returns an "abstract" expression of what the qualifier selects. Note that this expresion is only intended for visual aid and is not a valid SQL expresion.

getNegatedQualifier

public Qualifier getNegatedQualifier()

Access method that returns the wrapped contained qualifier that are defined as negated by the called Qualifier.