/** @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(Object) */
@Override
public boolean hasChildren(Object object) {
boolean hasChildren = false;
if (object instanceof EmuViewerNode) {
EmuViewerNode nodeObject = (EmuViewerNode) object;
// The node has children if its children collection is bigger than 0
// in size
hasChildren = (nodeObject.getChildren().size() > 0);
} else {
warn("Tried to test if an object that is not an emulation tree node has children");
}
return hasChildren;
}
/** @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(Object) */
@Override
public Object[] getChildren(Object parent) {
Set<EmuViewerNode> childrenCollection;
Object[] returnArray;
if (parent instanceof EmuViewerNode) {
// Firstly, try to retrieve the parent's children by means of the
// appropriate method
EmuViewerNode parentNode = (EmuViewerNode) parent;
childrenCollection = parentNode.getChildren();
// If the provided element is an emulator root node, it is needed to
// test if the
// intermediate nodes were already created (they are not created in
// the first request).
// If they were not created, assure that when the content framework
// requests, the
// intermediate nodes will be found.
//
// This procedure guarantees that once an emulator is started, it
// has the intermediate
// nodes constructed even if no emulation is being performed.
if (parentNode instanceof EmuViewerRootNode) {
String host = ((EmuViewerRootNode) parentNode).getEmulatorIdentifier();
for (EmuViewerNode child : childrenCollection) {
if (child.getChildren().size() == 0) {
addChildrenToLeafParentNode(child, host);
}
}
}
// Creating the array of elements to be returned
returnArray = childrenCollection.toArray(new EmuViewerNode[childrenCollection.size()]);
} else {
warn("Tried to get children of an object that is not an emulation tree node");
returnArray = new Object[0];
}
return returnArray;
}
/** @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(Object) */
@Override
public Object getParent(Object element) {
Object parent = null;
if (element instanceof EmuViewerNode) {
EmuViewerNode nodeElement = (EmuViewerNode) element;
if (nodeElement instanceof EmuViewerRootNode) {
// The IViewSite object is the parent of the whole tree
parent = treeParent;
} else {
parent = nodeElement.getParent();
}
} else {
warn("Tried to get parent of an object that is not an emulation tree node");
}
return parent;
}
