PageRenderTime 44ms CodeModel.GetById 21ms RepoModel.GetById 0ms app.codeStats 0ms

/jEdit/tags/jedit-4-5-pre1/org/gjt/sp/jedit/bsh/BSHWhileStatement.java

#
Java | 99 lines | 48 code | 15 blank | 36 comment | 8 complexity | 34ffcd5c16b861464e5cf0489f660530 MD5 | raw file
Possible License(s): BSD-3-Clause, AGPL-1.0, Apache-2.0, LGPL-2.0, LGPL-3.0, GPL-2.0, CC-BY-SA-3.0, LGPL-2.1, GPL-3.0, MPL-2.0-no-copyleft-exception, IPL-1.0
  1. /*****************************************************************************
  2. * *
  3. * This file is part of the BeanShell Java Scripting distribution. *
  4. * Documentation and updates may be found at http://www.beanshell.org/ *
  5. * *
  6. * Sun Public License Notice: *
  7. * *
  8. * The contents of this file are subject to the Sun Public License Version *
  9. * 1.0 (the "License"); you may not use this file except in compliance with *
  10. * the License. A copy of the License is available at http://www.sun.com *
  11. * *
  12. * The Original Code is BeanShell. The Initial Developer of the Original *
  13. * Code is Pat Niemeyer. Portions created by Pat Niemeyer are Copyright *
  14. * (C) 2000. All Rights Reserved. *
  15. * *
  16. * GNU Public License Notice: *
  17. * *
  18. * Alternatively, the contents of this file may be used under the terms of *
  19. * the GNU Lesser General Public License (the "LGPL"), in which case the *
  20. * provisions of LGPL are applicable instead of those above. If you wish to *
  21. * allow use of your version of this file only under the terms of the LGPL *
  22. * and not to allow others to use your version of this file under the SPL, *
  23. * indicate your decision by deleting the provisions above and replace *
  24. * them with the notice and other provisions required by the LGPL. If you *
  25. * do not delete the provisions above, a recipient may use your version of *
  26. * this file under either the SPL or the LGPL. *
  27. * *
  28. * Patrick Niemeyer (pat@pat.net) *
  29. * Author of Learning Java, O'Reilly & Associates *
  30. * http://www.pat.net/~pat/ *
  31. * *
  32. *****************************************************************************/
  33. package org.gjt.sp.jedit.bsh;
  34. /**
  35. This class handles both while(){} statements and do{}while() statements.
  36. */
  37. class BSHWhileStatement extends SimpleNode implements ParserConstants
  38. {
  39. public boolean isDoStatement;
  40. BSHWhileStatement(int id) { super(id); }
  41. public Object eval( CallStack callstack, Interpreter interpreter)
  42. throws EvalError
  43. {
  44. int numChild = jjtGetNumChildren();
  45. // Order of body and condition is swapped for do / while
  46. SimpleNode condExp, body = null;
  47. if ( isDoStatement ) {
  48. condExp = (SimpleNode)jjtGetChild(1);
  49. body =(SimpleNode)jjtGetChild(0);
  50. } else {
  51. condExp = (SimpleNode)jjtGetChild(0);
  52. if ( numChild > 1 ) // has body, else just for side effects
  53. body =(SimpleNode)jjtGetChild(1);
  54. }
  55. boolean doOnceFlag = isDoStatement;
  56. while(
  57. doOnceFlag ||
  58. BSHIfStatement.evaluateCondition(condExp, callstack, interpreter )
  59. )
  60. {
  61. if ( body == null ) // no body?
  62. continue;
  63. Object ret = body.eval(callstack, interpreter);
  64. boolean breakout = false;
  65. if(ret instanceof ReturnControl)
  66. {
  67. switch(((ReturnControl)ret).kind )
  68. {
  69. case RETURN:
  70. return ret;
  71. case CONTINUE:
  72. continue;
  73. case BREAK:
  74. breakout = true;
  75. break;
  76. }
  77. }
  78. if(breakout)
  79. break;
  80. doOnceFlag = false;
  81. }
  82. return Primitive.VOID;
  83. }
  84. }