Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Programming
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Databases
Mail Systems
openSolaris
Eclipse Documentation
Techotopia.com
Virtuatopia.com

How To Guides
Virtualization
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Windows
Problem Solutions
Privacy Policy

  




 

 


org.eclipse.emf.query.conditions.eobjects
Class EObjectConditionDelegator

java.lang.Object
  extended by 

org.eclipse.emf.query.conditions.Condition
      extended by 

org.eclipse.emf.query.conditions.eobjects.EObjectCondition
          extended by 
org.eclipse.emf.query.conditions.eobjects.EObjectConditionDelegator

public class EObjectConditionDelegator
extends EObjectCondition

A utility EObjectCondition class to act as a place holder for another EObjectCondition condition object where all the calls to it is simply forwarded to the wrapped EObjectCondition. Helps if when clients need an EObjectCondition to hold onto at a time when the actual EObjectCondition cannot be constructed for some reason or another, this way, a EObjectConditionDelegator can be returned while the delegated to EObjectCondition could be constructed later when more info is available. One other use is that when the client will hold on to an EObjectCondition while the requirements dictate that the EObjectCondition to use for evaluation could change over time, if the supplier of the EObjectCondition has no way of informing the clients of the change in the implementation of the EObjectCondition, it can pass on this EObjectConditionDelegator as wrapper for the EObjectCondition to use at the time of the request, and later on, the supplier can change the EObjectCondition to use at a later time and all the clients out there will be getting the latest version of the EObjectCondition to use for evaluation. Please note that it is the responsibility of the supplier of this EObjectConditionDelegator to ensure that it is properly initialized with the real EObjectCondition before the EObjectConditionDelegator is being used for evaluation by clients since this EObjectConditionDelegator will simply forward the evaluation call to the wrapped EObjectCondition.


Field Summary
 
Fields inherited from class org.eclipse.emf.query.conditions.eobjects. EObjectCondition
E_FALSE, E_TRUE
 
Fields inherited from class org.eclipse.emf.query.conditions. Condition
FALSE, TRUE
 
Constructor Summary
EObjectConditionDelegator ()
          A simple constructor, initializes the wrapped EObjectCondition to null.
EObjectConditionDelegator ( EObjectCondition eObjectCondition)
          A constructor that uses the argument EObjectCondition as its wrapped EObjectCondition.
 
Method Summary
 boolean isSatisfied ( EObject eObject)
          The implementation of this function simply forwards the actual evaluation to the wrapped EObjectCondition.
 boolean isSatisfied ( Object object)
          Overrides the parent's implementation by simply forwarding the actual evaluation to the wrapped EObjectCondition.
 void setEObjectCondition ( EObjectCondition eObjectCondition)
          Sets the wrapped EObjectCondition used by this EObjectConditionDelegator.
 boolean shouldPrune ( EObject eObject)
          The implementation of this function simply forwards the actual evaluation to the wrapped EObjectCondition.
 
Methods inherited from class org.eclipse.emf.query.conditions.eobjects. EObjectCondition
AND, EQUIVALENT, getPruneHandler, IMPLIES, OR, XOR
 
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
 

Constructor Detail

EObjectConditionDelegator

public EObjectConditionDelegator()
A simple constructor, initializes the wrapped EObjectCondition to null. The supplier of this EObjectConditionDelegator must ensure that a valid EObjectCondition is passed to this EObjectConditionDelegator before any calls for evaluation are made on it.


EObjectConditionDelegator

public EObjectConditionDelegator(
EObjectCondition eObjectCondition)
A constructor that uses the argument EObjectCondition as its wrapped EObjectCondition.

Parameters:
eObjectCondition - the delegated-to EObjectCondition where all calls made on this EObjectConditionDelegator will be forwarded to.
Method Detail

isSatisfied

public boolean isSatisfied(
Object object)
Overrides the parent's implementation by simply forwarding the actual evaluation to the wrapped EObjectCondition.

Overrides:
isSatisfied in class EObjectCondition
Parameters:
object - 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)

isSatisfied

public boolean isSatisfied(
EObject eObject)
The implementation of this function simply forwards the actual evaluation to the wrapped EObjectCondition.

Specified by:
isSatisfied in class EObjectCondition
Parameters:
eObject - the EObject to check
Returns:
boolean true if the argument eObject satisfies this EObjectCondition
See Also:
EObjectCondition.isSatisfied(org.eclipse.emf.ecore.EObject)

shouldPrune

public boolean shouldPrune(
EObject eObject)
The implementation of this function simply forwards the actual evaluation to the wrapped EObjectCondition.

Overrides:
shouldPrune in class EObjectCondition
Parameters:
eObject - the EObject to check to see whether to visit its children or not
Returns:
boolean true if we should prune and false otherwise
See Also:
EObjectCondition.shouldPrune(org.eclipse.emf.ecore.EObject)

setEObjectCondition

public void setEObjectCondition(
EObjectCondition eObjectCondition)
Sets the wrapped EObjectCondition used by this EObjectConditionDelegator. Could be completely different than the original one passed when constructing.

Parameters:
eObjectCondition - the EObjectCondition to forward calls to by this EObjectConditionDelegator

Copyright 2002, 2007 IBM Corporation and others.
All Rights Reserved.


 
 
  Published under the terms of the Eclipse Public License Version 1.0 ("EPL") Design by Interspire