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
doShowItem(firstItem);
		}
	}
	/**
	 * Set the item count of the receiver.
	 * 
	 * @param count
	 *            the new table size.
	 * 
	 * @since 3.1
	 */
	public void setItemCount(int count) {
		int oldCount = doGetItemCount();
		if (count < oldCount) {
			
			for (int i = count; i < oldCount; i++) {
				Item item = doGetItem(i);
				if (item.getData() != null) {
					disassociate(item);
				}
			}
		}
		doSetItemCount(count);
		if (virtualManager != null) {
			virtualManager.adjustCacheSize(count);
		}
		getControl().redraw();
	}
	/**
	 * Replace the entries starting at index with elements. This method assumes