org.eclipse.emf.emfstore.internal.client.ui.util

Class EMFStoreHandlerUtil

java.lang.Object

org.eclipse.emf.emfstore.internal.client.ui.util.EMFStoreHandlerUtil

public final class EMFStoreHandlerUtil
extends Object

This class provides helper methods that can determine the currently selected element.

Author:

ovonwesen

Method Summary

Modifier and Type	Method and Description
static <T> T	getSelection(org.eclipse.core.commands.ExecutionEvent event, Class<T> clazz) Extracts element from event.
static <T> boolean	hasSelection(org.eclipse.core.commands.ExecutionEvent event, Class<T> clazz) Returns whether an object of the given clazz can be extracted from the current selection.
static <T> T	requireSelection(org.eclipse.core.commands.ExecutionEvent event, Class<T> clazz) Returns an object of the given clazz if it can be extracted from the current selection.

Methods inherited from class java.lang.Object

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

Method Detail

getSelection

public static <T> T getSelection(org.eclipse.core.commands.ExecutionEvent event,
                                 Class<T> clazz)

Extracts element from event.

Type Parameters:

T - the type of the object to extract

Parameters:

event - the event

clazz - class type of the object to extract

Returns:

the object

requireSelection

public static <T> T requireSelection(org.eclipse.core.commands.ExecutionEvent event,
                                     Class<T> clazz)
                              throws RequiredSelectionException

Returns an object of the given clazz if it can be extracted from the current selection.

Type Parameters:

T - the type of the object to be extracted from the current selection

Parameters:

event - the event from which to extract the selection

clazz - the type of the object that is requested to be extracted from the current selection

Returns:

an object of type T that is contained within the current selection

Throws:

RequiredSelectionException - if the selection is invalid, i.e. if no object of the given type is contained in the selection or if the selection is null

hasSelection

public static <T> boolean hasSelection(org.eclipse.core.commands.ExecutionEvent event,
                                       Class<T> clazz)

Returns whether an object of the given clazz can be extracted from the current selection.

Type Parameters:

T - the type of the object to be extracted from the current selection

Parameters:

event - the event from which to extract the selection

clazz - the type of the object that is requested to be extracted from the current selection

Returns:

true if an object of type T is contained within the current selection, false otherwise