org.eclipse.linuxtools.tmf.ui/src/org/eclipse/linuxtools/tmf/ui/widgets/timegraph/widgets/TimeGraphSelection.java

   1 /*****************************************************************************
   2  * Copyright (c) 2007 Intel Corporation, 2009, 2012 Ericsson.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Eclipse Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Contributors:
   9  *   Intel Corporation - Initial API and implementation
  10  *   Ruslan A. Scherbakov, Intel - Initial API and implementation
  11  *   Alvaro Sanchez-Leon - Updated for TMF
  12  *   Patrick Tasse - Refactoring
  13  *
  14  *****************************************************************************/
  15
  16 package org.eclipse.linuxtools.tmf.ui.widgets.timegraph.widgets;
  17
  18 import java.util.ArrayList;
  19 import java.util.Iterator;
  20 import java.util.List;
  21
  22 import org.eclipse.jface.viewers.IStructuredSelection;
  23
  24 /**
  25  * Selection object for the time graph scale
  26  *
  27  * @version 1.0
  28  * @author Alvaro Sanchez-Leon
  29  * @author Patrick Tasse
  30  */
  31 public class TimeGraphSelection implements IStructuredSelection {
  32
  33     List<Object> list = new ArrayList<Object>();
  34
  35     /**
  36      * Default constructor
  37      */
  38     public TimeGraphSelection() {
  39     }
  40
  41     /**
  42      * "Wrapper" constructor. Instantiate a new selection object with only one
  43      * existing selection.
  44      *
  45      * @param sel
  46      *            The initial selection to add to this one
  47      */
  48     public TimeGraphSelection(Object sel) {
  49         add(sel);
  50     }
  51
  52     /**
  53      * Add a selection to this one.
  54      *
  55      * @param sel
  56      *            The selection to add
  57      */
  58     public void add(Object sel) {
  59         if (null != sel && !list.contains(sel)) {
  60             list.add(sel);
  61         }
  62     }
  63
  64     @Override
  65     public Object getFirstElement() {
  66         if (!list.isEmpty()) {
  67             return list.get(0);
  68         }
  69         return null;
  70     }
  71
  72     @Override
  73     public Iterator<Object> iterator() {
  74         return list.iterator();
  75     }
  76
  77     @Override
  78     public int size() {
  79         return list.size();
  80     }
  81
  82     @Override
  83     public Object[] toArray() {
  84         return list.toArray();
  85     }
  86
  87     @Override
  88     public List<Object> toList() {
  89         return list;
  90     }
  91
  92     @Override
  93     public boolean isEmpty() {
  94         return list.isEmpty();
  95     }
  96 }