Bug 171415 [Viewers] Table viewer needs to clear label, image when items are reused
If an item is reused for a different element on a refresh, the table viewer needs to clear the label and image from the item being reused. This is necessary to communicate to the label provider that a new label is needed (i.e. the label provider may defer providing a label if decorators are not ready). This is what the tree viewer does. To see the problem, open the Java Browsing perspective and select a Java project. Then click between different packages. Notice that some of the labels in the Types list take a while to update. Opening one of these reveals that the label is showing the wrong text.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTableViewer.java
if (comparator == null) {
			return doGetItemCount();
		}
		int count = doGetItemCount();
		int min = 0, max = count - 1;
		while (min <= max) {
			int mid = (min + max) / 2;
			Object data = doGetItem(mid).getData();
			int compare = comparator.compare(this, data, element);
			if (compare == 0) {
				
				while (compare == 0) {
					++mid;
					if (mid >= count) {
						break;
					}
					data = doGetItem(mid).getData();
					compare = comparator.compare(this, data, element);
				}
				return mid;
			}
			if (compare < 0) {
				min = mid + 1;
			} else {
				max = mid - 1;
			}
		}
		return min;
	}
	/*