code: package gr.uom.java.jdeodorant.refactoring.views;
  
  import gr.uom.java.ast.decomposition.cfg.mapping.CloneStructureNode;
  
  import java.util.Set;
  
  import org.eclipse.jface.viewers.ArrayContentProvider;
  import org.eclipse.jface.viewers.ITreeContentProvider;
  
  public class CloneDiffContentProvider extends ArrayContentProvider
  		implements ITreeContentProvider {
  
  	public Object[] getChildren(Object parentElement) {
  		CloneStructureNode cloneStructureNode = (CloneStructureNode) parentElement;
  		Set<CloneStructureNode> children = cloneStructureNode.getChildren();
  		return children.toArray();
  	}
  
  	public Object getParent(Object element) {
  		CloneStructureNode cloneStructureNode = (CloneStructureNode) element;
  		return cloneStructureNode.getParent();
  	}
  
  	public boolean hasChildren(Object element) {
  		CloneStructureNode cloneStructureNode = (CloneStructureNode) element;
  		Set<CloneStructureNode> children = cloneStructureNode.getChildren();
  		if (children.size() > 0){
  			return true;
  		}
  		else
  			return false;
  	}
  
  }
  