Eclipse GMF Guide (Galileo) - DestroyReferenceCommand (Eclipse GMF Documentation)

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org.eclipse.gmf.runtime.emf.type.core.commands
Class DestroyReferenceCommand

java.lang.Object
  

org.eclipse.core.commands.operations.AbstractOperation
      org.eclipse.emf.workspace.AbstractEMFOperation
          

org.eclipse.gmf.runtime.emf.commands.core.command.AbstractTransactionalCommand
              

org.eclipse.gmf.runtime.emf.type.core.commands.EditElementCommand
                  
org.eclipse.gmf.runtime.emf.type.core.commands.DestroyReferenceCommand

All Implemented Interfaces:: IUndoableOperation, ICommand, org.eclipse.gmf.runtime.common.core.internal.command.ICommandWithSettableResult

public class DestroyReferenceCommand
extends EditElementCommand
extends EditElementCommand

Command to destroy a reference from one element to another.

Constructor Summary

DestroyReferenceCommand ( DestroyReferenceRequest request)
          Constructs a new command to destroy a model element.

Method Summary

boolean canExecute ()
          Checks that the element to be modified by this command is of the correct kind.

protected CommandResult doExecuteWithResult ( IProgressMonitor monitor, IAdaptable info)
          Implemented by subclasses to perform the model changes.

protected org.eclipse.emf.ecore.EObject getContainer ()
          Gets element that contains the reference.

protected org.eclipse.emf.ecore.EReference getContainingFeature ()
          Gets the feature in the container that contains the reference.

protected org.eclipse.emf.ecore.EObject getReferencedObject ()
          Gets the referenced object.

Methods inherited from class org.eclipse.gmf.runtime.emf.type.core.commands. EditElementCommand

getAffectedFiles, getEClass, getEClassToEdit, getElementToEdit, getRequest, isOK, setEClass, setElementToEdit

Methods inherited from class org.eclipse.gmf.runtime.emf.commands.core.command. AbstractTransactionalCommand

aggregateStatuses, cleanup, compose, didRedo, didUndo, doExecute, doRedo, doUndo, getAffectedFiles, getCommandResult, getWorkspaceFiles, getWorkspaceFiles, internalSetResult, reduce, setResult

Methods inherited from class org.eclipse.emf.workspace.AbstractEMFOperation

canRedo, canSetOptions, canUndo, didCommit, dispose, execute, getChange, getEditingDomain, getOptions, isReuseParentTransaction, redo, setOptions, setReuseParentTransaction, undo

Methods inherited from class org.eclipse.core.commands.operations. AbstractOperation

addContext, getContexts, getLabel, hasContext, removeContext, setLabel, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.gmf.runtime.common.core.command. ICommand

setLabel

Methods inherited from interface org.eclipse.core.commands.operations. IUndoableOperation

addContext, canRedo, canUndo, dispose, execute, getContexts, getLabel, hasContext, redo, removeContext, undo

Constructor Detail

DestroyReferenceCommand

public DestroyReferenceCommand(
DestroyReferenceRequest request)

Constructs a new command to destroy a model element.

Parameters:: request - the destroy element requestO

Method Detail

doExecuteWithResult

protected 
CommandResult doExecuteWithResult(
IProgressMonitor monitor,
                                            
IAdaptable info)
                                     throws 
ExecutionException

Description copied from class: AbstractTransactionalCommand

Implemented by subclasses to perform the model changes. These changes are applied by manipulation of the EMF metamodel's API, not by executing commands on the editing domain's command stack.

Specified by:: doExecuteWithResult in class AbstractTransactionalCommand

Parameters:: monitor - the progress monitor provided by the operation history; info - the adaptable provided by the operation history
Returns:: the result of the execution
Throws:: ExecutionException - if, for some reason, I fail to complete the operation

getContainer

protected org.eclipse.emf.ecore.EObject getContainer()

Gets element that contains the reference.

Returns:: the element that contains the reference

getContainingFeature

protected org.eclipse.emf.ecore.EReference getContainingFeature()

Gets the feature in the container that contains the reference.

Returns:: the feature in the container that contains the reference.

getReferencedObject

protected org.eclipse.emf.ecore.EObject getReferencedObject()

Gets the referenced object.

Returns:: the referenced object.

canExecute

public boolean canExecute()

Description copied from class: EditElementCommand

Checks that the element to be modified by this command is of the correct kind.

Specified by:: canExecute in interface IUndoableOperation
Overrides:: canExecute in class EditElementCommand