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

java.lang.Object
  extended by 

org.eclipse.core.commands.operations.AbstractOperation
      extended by org.eclipse.emf.workspace.AbstractEMFOperation
          extended by 
org.eclipse.gmf.runtime.emf.commands.core.command.AbstractTransactionalCommand
All Implemented Interfaces:
IUndoableOperation, ICommand, org.eclipse.gmf.runtime.common.core.internal.command.ICommandWithSettableResult
Direct Known Subclasses:
AddCommand, CreateDiagramCommand, DeleteCommand, DuplicateEObjectsCommand, EditElementCommand, GroupCommand, RemoveBookmarkCommand, RepositionEObjectCommand, RestoreDefaultPropertyValueCommand, SetConnectionAnchorsCommand, SetConnectionEndsCommand, SetModelPropertyValueCommand, SetPropertyCommand, UngroupCommand, UpdateGroupLocationCommand 
public abstract class AbstractTransactionalCommand

extends org.eclipse.emf.workspace.AbstractEMFOperation
implements 
ICommand, org.eclipse.gmf.runtime.common.core.internal.command.ICommandWithSettableResult

An abstract superclass for GMF IUndoableOperations that modify EMF model resources.

The operation provides a list of IFiles that are expected to be modified when the operation is executed, undone or redone. An IOperationApprover is registered with the OperationHistoryFactory.getOperationHistory() to validate the modification to these resources.

Subclasses must return the command execution result in their implementation of doExecuteWithResult(IProgressMonitor, IAdaptable).

This class is meant to be extended by clients.

Constructor Summary
AbstractTransactionalCommand (org.eclipse.emf.transaction.TransactionalEditingDomain domain, java.lang.String label, java.util.List affectedFiles)
          Initializes me with the editing domain in which I am making model changes, a label, and a list of IFiles that I anticipate modifying when I am executed, undone or redone.
AbstractTransactionalCommand (org.eclipse.emf.transaction.TransactionalEditingDomain domain, java.lang.String label, java.util.Map options, java.util.List affectedFiles)
          Initializes me with the editing domain, a label, transaction options, and a list of IFiles that anticipate modifying when I am executed, undone or redone.
 
Method Summary
protected   IStatus aggregateStatuses (java.util.List statuses)
          Considers that the aggregate status may be different from the present status, and updates the command result accordingly.
protected  void cleanup ()
          Subclasses may implement this method to dispose of objects that were required for execution, but are no longer require to undo or redo this operation.
  ICommand compose ( IUndoableOperation operation)
          Returns a new command object that represents a composition of this command with the specified command parameter.
protected  void didRedo (org.eclipse.emf.transaction.Transaction tx)
           
protected  void didUndo (org.eclipse.emf.transaction.Transaction tx)
           
protected   IStatus doExecute ( IProgressMonitor monitor, IAdaptable info)
          Delegates to doExecuteWithResult(IProgressMonitor, IAdaptable) to perform the model changes.
protected abstract   CommandResult doExecuteWithResult ( IProgressMonitor monitor, IAdaptable info)
          Implemented by subclasses to perform the model changes.
protected   IStatus doRedo ( IProgressMonitor monitor, IAdaptable info)
          Overrides superclass to set the command result.
protected   IStatus doUndo ( IProgressMonitor monitor, IAdaptable info)
          Overrides superclass to set the command result.
 java.util.List getAffectedFiles ()
          Returns the IFiles for resources that may be modified when the operation is executed, undone or redone.
  CommandResult getCommandResult ()
          Retrieves the result of executing, undoing, or redoing this command, depending on which of these operations was last performed.
protected static java.util.List getWorkspaceFiles (org.eclipse.emf.ecore.EObject eObject)
          Convenience method to get a list of workspaces files associated with eObject.
protected static java.util.List getWorkspaceFiles (java.util.List eObjects)
          Convenience method to get a list of workspaces files associated with EObjects in eObject.
 void internalSetResult ( CommandResult result)
          Deprecated. internal API
  ICommand reduce ()
          Returns the simplest form of this command that is equivalent.
protected  void setResult ( CommandResult result)
          Sets the command result.
 
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, canExecute, 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, canExecute, canRedo, canUndo, dispose, execute, getContexts, getLabel, hasContext, redo, removeContext, undo
 

Constructor Detail

AbstractTransactionalCommand

public AbstractTransactionalCommand(org.eclipse.emf.transaction.TransactionalEditingDomain domain,
                                    java.lang.String label,
                                    java.util.List affectedFiles)
Initializes me with the editing domain in which I am making model changes, a label, and a list of IFiles that I anticipate modifying when I am executed, undone or redone.

Parameters:
domain - my editing domain
label - my user-readable label, should never be null.
affectedFiles - the list of affected IFiles; may be null

AbstractTransactionalCommand

public AbstractTransactionalCommand(org.eclipse.emf.transaction.TransactionalEditingDomain domain,
                                    java.lang.String label,
                                    java.util.Map options,
                                    java.util.List affectedFiles)
Initializes me with the editing domain, a label, transaction options, and a list of IFiles that anticipate modifying when I am executed, undone or redone.

Parameters:
domain - my editing domain
label - my user-readable label, should never be null.
options - for the transaction in which I execute myself, or null for the default options
affectedFiles - the list of affected IFiles; may be null
Method Detail

getWorkspaceFiles

protected static java.util.List getWorkspaceFiles(org.eclipse.emf.ecore.EObject eObject)
Convenience method to get a list of workspaces files associated with eObject.

Parameters:
eObject - the model object, may be null
Returns:
the list of IFiles

getWorkspaceFiles

protected static java.util.List getWorkspaceFiles(java.util.List eObjects)
Convenience method to get a list of workspaces files associated with EObjects in eObject.

Parameters:
eObjects - the list of model object
Returns:
the list of IFiles

getAffectedFiles

public java.util.List getAffectedFiles()
Returns the IFiles for resources that may be modified when the operation is executed, undone or redone.

Specified by:
getAffectedFiles in interface ICommand
Returns:
the list of IFiles that will be modified

getCommandResult

public final 
CommandResult getCommandResult()
Description copied from interface: ICommand
Retrieves the result of executing, undoing, or redoing this command, depending on which of these operations was last performed. This value can be null if the operation has no meaningful result.

The value of this result is undefined if the command has not yet been executed, undone or redone.

Specified by:
getCommandResult in interface ICommand
Returns:
The result of executing, undoing or redoing this command.

setResult

protected final void setResult(
CommandResult result)
Sets the command result.

Parameters:
result - the new result for this command.

compose

public 
ICommand compose(
IUndoableOperation operation)
Description copied from interface: ICommand
Returns a new command object that represents a composition of this command with the specified command parameter.

Specified by:
compose in interface ICommand
Parameters:
operation - The operation that is to be composed with this command.
Returns:
A command that represents a composition of this command with the specified command.

reduce

public 
ICommand reduce()
Description copied from interface: ICommand
Returns the simplest form of this command that is equivalent. Use this method to remove unnecessary nesting of commands.

Specified by:
reduce in interface ICommand
Returns:
the simplest form of this command that is equivalent

doExecuteWithResult

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

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

didUndo

protected void didUndo(org.eclipse.emf.transaction.Transaction tx)
Overrides:
didUndo in class org.eclipse.emf.workspace.AbstractEMFOperation

didRedo

protected void didRedo(org.eclipse.emf.transaction.Transaction tx)
Overrides:
didRedo in class org.eclipse.emf.workspace.AbstractEMFOperation

doExecute

protected 
IStatus doExecute(
IProgressMonitor monitor,
                            
IAdaptable info)
                     throws 
ExecutionException
Delegates to doExecuteWithResult(IProgressMonitor, IAdaptable) to perform the model changes. Sets the command result and calls cleanup() to give subclasses a chance to dispose of any objects that were required for the execution but will not be required for undo or redo.

Specified by:
doExecute in class org.eclipse.emf.workspace.AbstractEMFOperation
Throws:
ExecutionException

doUndo

protected 
IStatus doUndo(
IProgressMonitor monitor,
                         
IAdaptable info)
                  throws 
ExecutionException
Overrides superclass to set the command result.

Overrides:
doUndo in class org.eclipse.emf.workspace.AbstractEMFOperation
Throws:
ExecutionException

doRedo

protected 
IStatus doRedo(
IProgressMonitor monitor,
                         
IAdaptable info)
                  throws 
ExecutionException
Overrides superclass to set the command result.

Overrides:
doRedo in class org.eclipse.emf.workspace.AbstractEMFOperation
Throws:
ExecutionException

aggregateStatuses

protected 
IStatus aggregateStatuses(java.util.List statuses)
Considers that the aggregate status may be different from the present status, and updates the command result accordingly.

Overrides:
aggregateStatuses in class org.eclipse.emf.workspace.AbstractEMFOperation

cleanup

protected void cleanup()
Subclasses may implement this method to dispose of objects that were required for execution, but are no longer require to undo or redo this operation.

This method is invoked at the end of doExecute(IProgressMonitor, IAdaptable).

internalSetResult

public void internalSetResult(
CommandResult result)
Deprecated. internal API

Internal method to set the command result.

Specified by:
internalSetResult in interface org.eclipse.gmf.runtime.common.core.internal.command.ICommandWithSettableResult
Parameters:
result - CommandResult to set
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