package era.mi.logic.timeline;\r
\r
+import java.util.ArrayList;\r
+import java.util.List;\r
import java.util.PriorityQueue;\r
+import java.util.function.Consumer;\r
\r
/**\r
* Orders Events by the time they are due to be executed. Can execute Events individually.\r
+ * \r
* @author Fabian Stemmler\r
*\r
*/\r
-public class Timeline\r
-{\r
+public class Timeline {\r
private PriorityQueue<InnerEvent> events;\r
private long currentTime = 0;\r
- \r
- public Timeline(int initCapacity)\r
- {\r
+\r
+ private final List<Consumer<TimelineEvent>> eventAddedListener;\r
+\r
+ public Timeline(int initCapacity) {\r
events = new PriorityQueue<InnerEvent>(initCapacity, (a, b) -> {\r
long difference = a.getTiming() - b.getTiming();\r
- if(difference == 0)\r
+ if (difference == 0)\r
return 0;\r
return difference < 0 ? -1 : 1;\r
});\r
+\r
+ eventAddedListener = new ArrayList<>();\r
}\r
- \r
- public boolean hasNext()\r
- {\r
+\r
+ public boolean hasNext() {\r
return !events.isEmpty();\r
}\r
\r
- public void executeNext()\r
- {\r
+ public void executeNext() {\r
InnerEvent first = events.poll();\r
currentTime = first.getTiming();\r
first.run();\r
}\r
- \r
- public void executeAll()\r
- {\r
+\r
+ public void executeAll() {\r
while (hasNext())\r
executeNext();\r
}\r
- \r
+\r
/**\r
- * Executes all events up to a given simulation timestamp. The simulation\r
- * process can be constrained by a real world timestamp.\r
+ * Executes all events up to a given simulation timestamp. The simulation process can be constrained by a real world timestamp.\r
* \r
- * @param timestamp the simulation timestamp up to which the events will be\r
- * processed\r
- * @param stopMillis the System.currentTimeMillis() when simulation definitely\r
- * needs to stop.\r
+ * @param timestamp the simulation timestamp up to which the events will be processed\r
+ * @param stopMillis the System.currentTimeMillis() when simulation definitely needs to stop.\r
* @return if it was possible to fulfil the goal in the given real world time.\r
* @author Christian Femers\r
*/\r
- public ExecutionResult executeUpTo(long timestamp, long stopMillis)\r
- {\r
- if (events.isEmpty())\r
- {\r
+ public ExecutionResult executeUpTo(long timestamp, long stopMillis) {\r
+ if (events.isEmpty()) {\r
currentTime = timestamp;\r
return ExecutionResult.NOTHING_DONE;\r
}\r
int checkStop = 0;\r
InnerEvent first = events.peek();\r
- while (first != null && first.getTiming() <= timestamp)\r
- {\r
+ while (first != null && first.getTiming() <= timestamp) {\r
events.remove();\r
currentTime = first.getTiming();\r
first.run();\r
return ExecutionResult.DONE_IN_TIME;\r
}\r
\r
- public long getSimulationTime()\r
- {\r
+ public long getSimulationTime() {\r
return currentTime;\r
}\r
- \r
- public void reset()\r
- {\r
+\r
+ public long nextEventTime() {\r
+ if (!hasNext())\r
+ return -1;\r
+ else\r
+ return events.peek().timing;\r
+ }\r
+\r
+ public void reset() {\r
events.clear();\r
currentTime = 0;\r
}\r
- \r
+\r
+ public void addEventAddedListener(Consumer<TimelineEvent> listener) {\r
+ eventAddedListener.add(listener);\r
+ }\r
+\r
+ public void removeEventAddedListener(Consumer<TimelineEvent> listener) {\r
+ eventAddedListener.remove(listener);\r
+ }\r
+\r
/**\r
* Adds an Event to the {@link Timeline}\r
- * @param function The {@link TimelineEventHandler} that will be executed, when the {@link InnerEvent} occurs on the timeline.\r
+ * \r
+ * @param function The {@link TimelineEventHandler} that will be executed, when the {@link InnerEvent} occurs on the timeline.\r
* @param relativeTiming The amount of MI ticks in which the {@link InnerEvent} is called, starting from the current time.\r
*/\r
- public void addEvent(TimelineEventHandler function, int relativeTiming)\r
- {\r
+ public void addEvent(TimelineEventHandler function, int relativeTiming) {\r
long timing = currentTime + relativeTiming;\r
- events.add(new InnerEvent(function, new TimelineEvent(timing), timing));\r
+ TimelineEvent event = new TimelineEvent(timing);\r
+ events.add(new InnerEvent(function, event, timing));\r
+ eventAddedListener.forEach(l -> l.accept(event));\r
}\r
- \r
- private class InnerEvent\r
- {\r
+\r
+ private class InnerEvent {\r
\r
private final long timing;\r
private final TimelineEventHandler function;\r
private final TimelineEvent event;\r
- \r
+\r
/**\r
* Creates an {@link InnerEvent}\r
+ * \r
* @param function {@link TimelineEventHandler} to be executed when the {@link InnerEvent} occurs\r
- * @param timing Point in the MI simulation {@link Timeline}, at which the {@link InnerEvent} is executed;\r
+ * @param timing Point in the MI simulation {@link Timeline}, at which the {@link InnerEvent} is executed;\r
*/\r
- InnerEvent(TimelineEventHandler function, TimelineEvent event, long timing)\r
- {\r
+ InnerEvent(TimelineEventHandler function, TimelineEvent event, long timing) {\r
this.function = function;\r
this.event = event;\r
this.timing = timing;\r
}\r
\r
- public long getTiming()\r
- {\r
+ public long getTiming() {\r
return timing;\r
}\r
- \r
- public void run()\r
- {\r
+\r
+ public void run() {\r
function.handle(event);\r
}\r
- \r
+\r
@Override\r
- public String toString()\r
- {\r
+ public String toString() {\r
return event.toString();\r
}\r
}\r
- \r
+\r
@Override\r
- public String toString()\r
- {\r
+ public String toString() {\r
return "simulation time: " + currentTime + ", " + events.toString();\r
}\r
- \r
- public static long toNanoseconds(long ticks)\r
- {\r
- return ticks; //TODO: Alter this when it has been determined how ticks should relate to real time.\r
+\r
+ public static long toNanoseconds(long ticks) {\r
+ return ticks; // TODO: Alter this when it has been determined how ticks should relate to real time.\r
}\r
- \r
- public enum ExecutionResult\r
- {\r
- NOTHING_DONE, DONE_IN_TIME, RAN_OUT_OF_TIME \r
+\r
+ public enum ExecutionResult {\r
+ NOTHING_DONE, DONE_IN_TIME, RAN_OUT_OF_TIME\r
}\r
}
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