org.eclipse.tracecompass.tmf.ui/src/org/eclipse/tracecompass/tmf/ui/viewers/ArrayTreeContentProvider.java

   1 /*******************************************************************************
   2  * Copyright (c) 2014 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Patrick Tasse - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.tracecompass.tmf.ui.viewers;
  14
  15 import java.util.Collection;
  16
  17 import org.eclipse.jface.viewers.ITreeContentProvider;
  18 import org.eclipse.jface.viewers.Viewer;
  19
  20 /**
  21  * This implementation of <code>ITreeContentProvider</code> handles the case
  22  * where the viewer input is an unchanging array or collection of elements.
  23  * The elements do not have children.
  24  *
  25  * @author Patrick Tasse
  26  */
  27 public class ArrayTreeContentProvider implements ITreeContentProvider {
  28
  29     @Override
  30     public void dispose() {
  31     }
  32
  33     @Override
  34     public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
  35     }
  36
  37     @Override
  38     public Object[] getChildren(Object parentElement) {
  39         return null;
  40     }
  41
  42     @Override
  43     public Object getParent(Object element) {
  44         return null;
  45     }
  46
  47     @Override
  48     public boolean hasChildren(Object element) {
  49         return false;
  50     }
  51
  52     @Override
  53     public Object[] getElements(Object inputElement) {
  54         if (inputElement instanceof Object[]) {
  55             return (Object[]) inputElement;
  56         }
  57         if (inputElement instanceof Collection) {
  58             return ((Collection<?>) inputElement).toArray();
  59         }
  60         return new Object[0];
  61     }
  62
  63 }