Bug 24024 [Viewers] Error in Javadoc for AbstractTreeViewer::setAutoExpandLevel()
from Javadoc for AbstractTreeViewer::setAutoExpandLevel() : * Sets the auto-expand level. * The value 0 means that the root's children are not visible; * 1 means that the root is expanded so that its children are visible, * but the root's grandchildren are not; and so on. That's off by one. 0 means auto-expand is off. 1 means that roots are not expanded. 2 means that children of the roots are expanded, but not grandchildren; etc. * The value <code>EXPAND_ALL</code> means that all subtrees should be * expanded. The constant should read ALL_LEVELS Note that some other expansion-methods need these comment updates too.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
boolean removeAll = false;
	boolean addDummy = false;
	Object data = item.getData();
	if (data != null && equals(element, data)) {
		
		if (hasPlus != needsPlus) {
			if (needsPlus)
				addDummy = true;
			else
				removeAll = true;
		}
	} else {
		
		removeAll = true;
		addDummy = needsPlus;
		
		setExpanded(item, false);
	}
	if (removeAll) {
		
		Item[] items = getItems(item);
		for (int i = 0; i < items.length; i++) {
			if (items[i].getData() != null)
				disassociate(items[i]);
			items[i].dispose();
		}
	}
	if (addDummy)
		newItem(item, SWT.NULL, -1); 
}