UndoManager (hybris Commerce Suite 6.3.0.0-SNAPSHOT)

All Known Implementing Classes:

BundleUndoManager, DefaultUndoManager
```
public interface UndoManager
```
Manages UndoableOperations. You add such an operation with addOperation(UndoableOperation) and it is put on a stack. To perform the latest undo call undo(). The operation is then put on the re-do stack. To re-do the latest undone operation call redo().

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`addOperation(UndoableOperation operation)` Puts an UndoableOperation on the stack.
`boolean`	`canRedo()` Returns true if there's an re-do operation and if the current re-do operation can be performed i.e its `UndoableOperation.canRedo()` returns true.
`boolean`	`canUndo()` Returns true if there's an undo operation and if the current undo operation can be performed, i.e its `UndoableOperation.canUndo()` returns true.
`List<UndoableOperation>`	`getRedoOperations()` Returns the re-do operations in the stack's order with the most recent first.
`String`	`getRedoPresentationName()` Returns a human readable description of the most recent re-do operation
`List<UndoableOperation>`	`getUndoOperations()` Returns the undo operations in the stack's order with the most recent first.
`String`	`getUndoPresentationName()` Returns a human readable description of the most recent undo operation
`UndoableOperation`	`peekRedoOperation()` Returns the latest re-do operation without performing it.
`UndoableOperation`	`peekUndoOperation()` Returns the latest undo operation without performing it.
`void`	`redo()` Re-does the last undo operation, removes it from the re-do stack and puts it on the undo stack.
`void`	`undo()` Undoes the latest operation.

- Method Detail
  - undo
```
void undo()
   throws CannotUndoException
```
    Undoes the latest operation. Puts the UndoOperation on the re-do stack.
    
    Throws:
    
    CannotUndoException - if there is no UndoOperation or if the latest operation cannot be undone
  - canUndo
```
boolean canUndo()
```
    Returns true if there's an undo operation and if the current undo operation can be performed, i.e its UndoableOperation.canUndo() returns true.
    
    Returns:
    
    true if there's an undo operation and if the current undo operation can be performed, false otherwise
  - redo
```
void redo()
   throws CannotRedoException
```
    Re-does the last undo operation, removes it from the re-do stack and puts it on the undo stack.
    
    Throws:
    
    CannotRedoException - if there is no re-do operation on the stack or the current re-do operation cannot be performed
  - canRedo
```
boolean canRedo()
```
    Returns true if there's an re-do operation and if the current re-do operation can be performed i.e its UndoableOperation.canRedo() returns true.
    
    Returns:
    
    true if there's an re-do operation and if the current re-do operation can be performed, false otherwise
  - addOperation
```
void addOperation(UndoableOperation operation)
```
    Puts an UndoableOperation on the stack. If the stack is full the oldest UndoableOperation is removed from the stack.
    
    Parameters:
    
    operation - the UndoableOperation operation to be put on the stack
  - peekUndoOperation
```
UndoableOperation peekUndoOperation()
```
    Returns the latest undo operation without performing it.
    
    Returns:
    
    latest undo operation without performing it
  - peekRedoOperation
```
UndoableOperation peekRedoOperation()
```
    Returns the latest re-do operation without performing it.
    
    Returns:
    
    latest re-do operation without performing it
  - getUndoOperations
```
List<UndoableOperation> getUndoOperations()
```
    Returns the undo operations in the stack's order with the most recent first.
    
    Returns:
    
    undo operations in the stack's order with the most recent first
  - getRedoOperations
```
List<UndoableOperation> getRedoOperations()
```
    Returns the re-do operations in the stack's order with the most recent first.
    
    Returns:
    
    re-do operations in the stack's order with the most recent first
  - getUndoPresentationName
```
String getUndoPresentationName()
```
    Returns a human readable description of the most recent undo operation
    
    Returns:
    
    human readable description of the most recent undo operation
  - getRedoPresentationName
```
String getRedoPresentationName()
```
    Returns a human readable description of the most recent re-do operation
    
    Returns:
    
    human readable description of the most recent re-do operation

Interface UndoManager

Method Summary

Method Detail

undo

canUndo

redo

canRedo

addOperation

peekUndoOperation

peekRedoOperation

getUndoOperations

getRedoOperations

getUndoPresentationName

getRedoPresentationName