1 package org.opentrafficsim.core.perception.collections;
2
3 import java.util.Collection;
4 import java.util.Vector;
5
6 import org.djunits.value.vdouble.scalar.Time;
7 import org.opentrafficsim.core.perception.HistoryManager;
8
9 /**
10 * Vector-valued historical state. The current vector is always maintained, and past states of the vector are obtained by
11 * applying the events between now and the requested time in reverse.<br>
12 * <br>
13 * This class does not implement all {@code Vector} methods, but only those shared with {@code List}. The returned argument is
14 * however a {@code List}.<br>
15 * <br>
16 * The {@code Iterator} returned by this class does not support the {@code remove()}, {@code add()} and {@code set()} methods.
17 * Any returned sublist is unmodifiable.
18 * <p>
19 * Copyright (c) 2013-2019 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved. <br>
20 * BSD-style license. See <a href="http://opentrafficsim.org/node/13">OpenTrafficSim License</a>.
21 * <p>
22 * @version $Revision$, $LastChangedDate$, by $Author$, initial version 3 feb. 2018 <br>
23 * @author <a href="http://www.tbm.tudelft.nl/averbraeck">Alexander Verbraeck</a>
24 * @author <a href="http://www.tudelft.nl/pknoppers">Peter Knoppers</a>
25 * @author <a href="http://www.transport.citg.tudelft.nl">Wouter Schakel</a>
26 * @param <E> element type
27 */
28 public class HistoricalVector<E> extends AbstractHistoricalList<E, Vector<E>>
29 {
30
31 /**
32 * Constructor.
33 * @param historyManager HistoryManager; history manager
34 */
35 public HistoricalVector(final HistoryManager historyManager)
36 {
37 super(historyManager, new Vector<>());
38 }
39
40 /**
41 * Constructor.
42 * @param historyManager HistoryManager; history manager
43 * @param c Collection<? extends E>; initial collection
44 */
45 public HistoricalVector(final HistoryManager historyManager, final Collection<? extends E> c)
46 {
47 super(historyManager, new Vector<>(c));
48 }
49
50 /** {@inheritDoc} */
51 @Override
52 public Vector<E> get()
53 {
54 return getCollection();
55 }
56
57 /** {@inheritDoc} */
58 @Override
59 public Vector<E> get(final Time time)
60 {
61 if (isLastState(time))
62 {
63 return getCollection();
64 }
65 return fill(time, new Vector<>());
66 }
67
68 /** {@inheritDoc} */
69 @Override
70 public String toString()
71 {
72 return "HistoricalVector [current=" + getCollection() + "]";
73 }
74
75 }