HeatbugModelSwarm中buildActions部分,3个try分别是做什么?查了下refbook-java-2.2,解释太简略,还是不懂,高手指点,谢谢!代码如下:
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public Object buildActions () {. a1 a7 R' i( r, p- J
super.buildActions();
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6 W2 A, P/ @" K' z& { // Create the list of simulation actions. We put these in% O2 N$ v y n* u$ E) @
// an action group, because we want these actions to be: }; {3 _) |* D" `( a& g0 d) t
// executed in a specific order, but these steps should# u' {; ^9 a& g6 ]! G+ T+ U
// take no (simulated) time. The M(foo) means "The message
i$ C+ f( Y; @$ q3 v3 T // called <foo>". You can send a message To a particular5 Q: b; V+ m9 J; g; B
// object, or ForEach object in a collection.
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7 f' V& e' x7 a // Note we update the heatspace in two phases: first run: j* F# b3 J% U3 x
// diffusion, then run "updateWorld" to actually enact the
% e, r/ n! g; A4 X // changes the heatbugs have made. The ordering here is# R% G3 e7 T/ N. X* g
// significant!& U6 f! N4 z+ X
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// Note also, that with the additional1 a: g+ a" V, y# X9 X( a
// `randomizeHeatbugUpdateOrder' Boolean flag we can
9 T/ a, i" v/ J+ R // randomize the order in which the bugs actually run4 a6 d# B$ y& i- C$ o
// their step rule. This has the effect of removing any$ E5 |8 w) Z. o5 w
// systematic bias in the iteration throught the heatbug
1 N. e; _4 X0 {' i, z1 Y1 M t h7 X. I // list from timestep to timestep
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6 m/ j9 b3 ^8 t8 z1 i // By default, all `createActionForEach' modelActions have
$ q+ n8 O, ]5 j" |2 ?" x/ ^ // a default order of `Sequential', which means that the$ }2 r4 n6 c3 { k
// order of iteration through the `heatbugList' will be2 d/ h+ U# d* l0 E
// identical (assuming the list order is not changed1 u. D* L. d1 [' k7 v& h
// indirectly by some other process).
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modelActions = new ActionGroupImpl (getZone ());
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try {
0 I( u3 T* S! T8 e5 O modelActions.createActionTo$message
1 p5 G/ E) p; N' V (heat, new Selector (heat.getClass (), "stepRule", false));, s2 O) h- _9 @2 \
} catch (Exception e) {
; P! @ |5 y& N& s2 _ System.err.println ("Exception stepRule: " + e.getMessage ());
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try {
% |, t/ Z* w. e: t Heatbug proto = (Heatbug) heatbugList.get (0);% s6 p% w. e9 e" k. J& Z. Z9 M
Selector sel = : G0 ~' c' m/ \$ l4 o, Q8 I2 S
new Selector (proto.getClass (), "heatbugStep", false);
/ ?% ]3 k4 b" c* e% I# x @ actionForEach =
2 n A3 q8 e: j* [5 a. Y modelActions.createFActionForEachHomogeneous$call' \9 X- w3 e, V
(heatbugList,
. q0 [, X; y- _$ n new FCallImpl (this, proto, sel,# W4 D% L8 h& _
new FArgumentsImpl (this, sel)));
0 [* B6 U% I- v# ` o: X$ T } catch (Exception e) {
4 U) k ?6 F- N e.printStackTrace (System.err);
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, ?, H' j& v% f* w# Q+ f syncUpdateOrder ();/ A' {2 t0 V7 [$ i2 R. l
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try {
" T$ s# P% Y4 q" _# b' s3 n modelActions.createActionTo$message $ y. P" C4 \( h4 ]4 |' B
(heat, new Selector (heat.getClass (), "updateLattice", false));
$ G* b6 p- d+ B8 c; h( b# g% n } catch (Exception e) {
[1 F2 S+ q. T8 @2 T0 g System.err.println("Exception updateLattice: " + e.getMessage ());3 h5 m k8 ~/ {# U
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8 I0 E% J2 f+ r' V8 z1 T6 I! _ // Then we create a schedule that executes the
( J6 V" Z1 i+ v1 H0 ?1 P/ O // modelActions. modelActions is an ActionGroup, by itself it& T1 S9 S2 k% Z1 n
// has no notion of time. In order to have it executed in: G" O& }* ?! }4 A2 |
// time, we create a Schedule that says to use the& I4 B4 p$ y v8 {2 A, A4 J o: h
// modelActions ActionGroup at particular times. This
" J- k+ {6 \- i& h2 x; e // schedule has a repeat interval of 1, it will loop every
5 R( Y: i' I F$ k$ K' Z T$ x' T' N // time step. The action is executed at time 0 relative to
, \" `' d1 \/ u; `! C // the beginning of the loop.. G4 u% ~4 } o1 z
- v- _7 q7 f) `3 _ // This is a simple schedule, with only one action that is& k) Q, M1 v/ J2 @1 V! ?+ M
// just repeated every time. See jmousetrap for more
+ @! a* H: e5 m7 Q! o // complicated schedules.8 b, k9 ]9 k6 |
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modelSchedule = new ScheduleImpl (getZone (), 1);
1 m( T) S5 v& t. N3 W modelSchedule.at$createAction (0, modelActions);
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return this;
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