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1 /*
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2 * Copyright (c) 2001, Samer Abdallah, King's College London.
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3 * All rights reserved.
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4 *
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5 * This software is provided AS iS and WITHOUT ANY WARRANTY;
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6 * without even the implied warranty of MERCHANTABILITY or
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7 * FITNESS FOR A PARTICULAR PURPOSE.
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8 */
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9
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10 package samer.tools;
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11 import samer.core.types.*;
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12
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13 /**
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14 * This is a task that runs a single child task
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15 * every N iterations, that is, at some integer
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16 * sub-multiple of the main loop rate
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17 */
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18
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19 public class SwitchTask implements Task
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20 {
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21 private Task task;
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22 private VBoolean enable;
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23
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24 public SwitchTask(Task t) { this(true,t); }
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25 public SwitchTask(boolean e, Task t) {
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26 enable=new VBoolean("enable",e);
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27 enable.value=e; enable.changed(); task=t;
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28 }
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29
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30
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31 public void enable() { enable.value=true; enable.changed(); }
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32 public void disable() { enable.value=false; enable.changed(); }
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33
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34 public final void starting() { if (enable.value) task.starting(); }
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35 public final void stopping() { if (enable.value) task.stopping(); }
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36 public final void run() throws Exception { if (enable.value) task.run(); }
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37
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38 public void dispose() { task.dispose(); }
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39 public String toString() { return "Switch("+enable.value+"):"+task; }
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40 }
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