org.eclipse.emf.query.conditions
Class ObjectInstanceCondition

java.lang.Object
  org.eclipse.emf.query.conditions.Condition
      org.eclipse.emf.query.conditions.ObjectInstanceCondition

public class ObjectInstanceCondition
extends Condition

A Condition that tests whether the argument object instance equals a given object.

To look for null values in scalar EAttributes, use the special IS_NULL shared condition instance. Simply initializing an ObjectInstanceCondition with null will not work.

Field Summary

static ObjectInstanceCondition

IS_NULL A special object-instance condition checking that a value is null.

Fields inherited from class org.eclipse.emf.query.conditions.Condition

FALSE, TRUE

Constructor Summary

ObjectInstanceCondition(Object object)
A simple constructor.

Method Summary

protected Object	getObject() A getter function for the Object instance used by this ObjectInstanceCondition
boolean	isSatisfied(Object obj) Tests whether the argument Object instance equals this ObjectInstanceCondition's own Object instance.

Methods inherited from class org.eclipse.emf.query.conditions.Condition

AND, EQUIVALENT, IMPLIES, OR, XOR

Methods inherited from class java.lang.Object

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

Field Detail

IS_NULL

public static final ObjectInstanceCondition IS_NULL

A special object-instance condition checking that a value is null.

Since:

1.1

Constructor Detail

ObjectInstanceCondition

public ObjectInstanceCondition(Object object)

A simple constructor. Initializes the object instance to use for equality tests

Parameters:

object - The given object instance to test equality for

Method Detail

isSatisfied

public boolean isSatisfied(Object obj)

Tests whether the argument Object instance equals this ObjectInstanceCondition's own Object instance.

Specified by:

isSatisfied in class Condition

Parameters:

obj - an Object to check if it satisfies this Condition

Returns:

true if the argument Object satisfies this Condition,false otherwise.

See Also:

Condition.isSatisfied(java.lang.Object)

getObject

protected final Object getObject()

A getter function for the Object instance used by this ObjectInstanceCondition

Returns:

Object the given object instance which we test equality for