Bug 266699 [CommonNavigator] Remove CommonDropAdapter.setCurrentOperation
This has been replaced by overrideOperation() which does the same thing. Note that setCurrentOperation() was added in M5 so it's never really been API yet.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonDropAdapter.java
super.dragEnter(event);
				return;
			}
		}
		for (int i = 0; i < event.dataTypes.length; i++) {
			if (FileTransfer.getInstance().isSupportedType(event.dataTypes[i])) {
				event.currentDataType = event.dataTypes[i];
				event.detail = DND.DROP_COPY; 
				if (Policy.DEBUG_DND) {
					System.out.println("CommonDropAdapter.dragEnter: file: " + event.currentDataType); 
				}
				super.dragEnter(event);
				return;
			}
		}
		for (int i = 0; i < event.dataTypes.length; i++) {
			if (PluginTransfer.getInstance()
					.isSupportedType(event.dataTypes[i])) {
				event.currentDataType = event.dataTypes[i]; 
				if (Policy.DEBUG_DND) {
					System.out.println("CommonDropAdapter.dragEnter: plugin: " + event.currentDataType); 
				}
				super.dragEnter(event);
				return;
			}
		}
		event.detail = DND.DROP_NONE; 
	}
	/*
	 * (non-Javadoc)