设为首页收藏本站

最大的系统仿真与系统优化公益交流社区

 找回密码
 注册

QQ登录

只需一步,快速开始

查看: 11222|回复: 0

[求助] 问jheatbugs-2001-03-28中某些代码

[复制链接]
发表于 2008-5-25 02:15:22 | 显示全部楼层 |阅读模式
5仿真币
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:- n* Y  V4 n/ `1 \, Z
* Q. V- I# N% e
public Object buildActions () {
, L: ?0 l" J( v$ v  w    super.buildActions();
- E: W/ Y8 v6 N+ v    * \9 Y2 U/ Z1 c2 K6 R% ], d
    // Create the list of simulation actions. We put these in
  v3 O6 j; x5 l6 q& j; \5 L% r    // an action group, because we want these actions to be
  S: K/ q: l! J7 K- x    // executed in a specific order, but these steps should' b( e. p- X  l* ~" G# b, a
    // take no (simulated) time. The M(foo) means "The message2 i. B! e1 Z- F& Y1 T; @% e
    // called <foo>". You can send a message To a particular$ K2 F+ k, g; C6 k8 e
    // object, or ForEach object in a collection.3 s3 ~9 e, a, j$ a* ?
        ! L) v# v# c; ~5 {
    // Note we update the heatspace in two phases: first run9 \# h8 o; q0 {
    // diffusion, then run "updateWorld" to actually enact the
5 b( Z" z/ X3 T; q7 e    // changes the heatbugs have made. The ordering here is
& d4 B# h2 x$ m5 x! @- a# u    // significant!
' G  I' {! D/ e        
6 x- d$ I3 x/ J! k8 d+ o: f    // Note also, that with the additional
; [# n# `) }3 d5 ?& O( R0 G    // `randomizeHeatbugUpdateOrder' Boolean flag we can# x* [* _! @7 C$ f3 v+ s" S) L
    // randomize the order in which the bugs actually run
8 {/ S% c: n/ V3 n1 p: w+ W    // their step rule.  This has the effect of removing any- R! a+ h0 \/ j/ n3 Y5 x9 r6 s" e
    // systematic bias in the iteration throught the heatbug
* F) y( @4 T- K    // list from timestep to timestep
- P/ n+ {; K) l        + s1 H0 r  z2 z: l0 B4 W4 n
    // By default, all `createActionForEach' modelActions have7 b+ o$ l+ o# O5 j* \# Z0 w# T' R4 }
    // a default order of `Sequential', which means that the: E& M0 u! V1 f+ l2 h% R
    // order of iteration through the `heatbugList' will be
5 o) w3 z+ C" o) w! s, M    // identical (assuming the list order is not changed8 D  K9 J# v( s. X/ L5 K
    // indirectly by some other process).
. L+ a' R; N1 s3 F  Q  F    . g8 b* l1 N! U% f, Q1 I
    modelActions = new ActionGroupImpl (getZone ());
  v# w3 _( b" z$ H" T$ \4 w3 Y. V7 x$ j) g  R1 |! f1 y
    try {: T; p* K3 c* ?4 d+ ^6 Y
      modelActions.createActionTo$message
0 S3 s. x: B0 L+ q5 R! H0 f        (heat, new Selector (heat.getClass (), "stepRule", false));
* c0 y3 z( z; k1 V, N7 R    } catch (Exception e) {1 j: f3 s: I& l8 w2 Y# B
      System.err.println ("Exception stepRule: " + e.getMessage ());; Y& q' R) Y' \; I6 r8 }7 e5 d* Z
    }
. ]! w1 B; ?1 C5 |, r4 c( A" I0 W' s2 s
    try {
- H8 O' F' H$ C8 Z/ r$ C" u* l      Heatbug proto = (Heatbug) heatbugList.get (0);: I- K& v. L0 {6 K" b
      Selector sel =
" P  J. `4 l- G/ |        new Selector (proto.getClass (), "heatbugStep", false);
8 e- s( [; l) `# {3 O2 c% o- }      actionForEach =
& Y& k5 o3 M3 w- ?        modelActions.createFActionForEachHomogeneous$call
4 a; x2 m  L& T        (heatbugList,
5 V( G! @& h; v1 L1 F         new FCallImpl (this, proto, sel,
( m' k3 `5 o" J+ s                        new FArgumentsImpl (this, sel)));! u1 O+ p/ y& J) v) T# ?
    } catch (Exception e) {3 \) z9 Y. ^: Q' F/ M7 e* t
      e.printStackTrace (System.err);
. e' L* g5 X1 Z) p" v    }
% o6 R( Z# \- H5 {    3 Z  Q9 E; f9 |+ r1 w; {+ k" f
    syncUpdateOrder ();
0 {( J6 ^4 w. k: x0 j2 a; [) W& ^/ L$ Q* K) L7 E* s
    try {
! n" _+ {: Q+ T0 A2 M, N      modelActions.createActionTo$message , m' _+ b7 e) Z; O
        (heat, new Selector (heat.getClass (), "updateLattice", false));1 x+ {; c5 b1 ^1 g, ]
    } catch (Exception e) {# t1 W. ]: d0 w
      System.err.println("Exception updateLattice: " + e.getMessage ());
0 T! g) G$ V8 L8 u    }! u* m6 N+ s. c8 d- x* D
        
8 p# h/ D( G( a! }$ x# Z$ B3 W    // Then we create a schedule that executes the; }" L/ w- ^# L" ^( r) ~
    // modelActions. modelActions is an ActionGroup, by itself it7 z/ y# B; l! k4 @7 L# d( U2 k
    // has no notion of time. In order to have it executed in
0 S" A6 s5 J+ ^2 k- z    // time, we create a Schedule that says to use the
2 m" |/ I' c1 `( \$ Z) r8 T    // modelActions ActionGroup at particular times.  This  Z# j% t. m! d' @
    // schedule has a repeat interval of 1, it will loop every5 o& v& T- G9 w  o
    // time step.  The action is executed at time 0 relative to
# ]) L' y; T2 x9 j. K0 J4 \% T; ?    // the beginning of the loop.
! y! T1 `/ k( s7 ~* h
6 G* ?' V( x" P5 w    // This is a simple schedule, with only one action that is8 f- n* b' W& }) p( Q% q2 [
    // just repeated every time. See jmousetrap for more. l! |9 }3 ]; A1 l5 j( M; m0 J
    // complicated schedules.
! l5 {' I8 y' G  
  B3 v- c3 r( O9 G  |    modelSchedule = new ScheduleImpl (getZone (), 1);$ v8 q* |( g6 j/ T
    modelSchedule.at$createAction (0, modelActions);
* `$ O7 q" i7 r$ U. {        . c9 W7 n! n4 K4 o3 B! b( V  V
    return this;
2 I5 \: d+ v6 m0 l5 p! v  J+ B  }
您需要登录后才可以回帖 登录 | 注册

本版积分规则

QQ|Archiver|手机版|SimulWay 道于仿真   

GMT+8, 2026-6-19 12:48 , Processed in 0.012731 second(s), 11 queries .

Powered by Discuz! X3.4 Licensed

© 2001-2017 Comsenz Inc.

快速回复 返回顶部 返回列表