/interpreter/tags/at2-build190607/src/edu/vub/at/objects/grammar/ATImport.java

http://ambienttalk.googlecode.com/ · Java · 66 lines · 8 code · 6 blank · 52 comment · 0 complexity · 84e45ed7a8357131cc7906f2032c8611 MD5 · raw file

  1. /**
  2. * AmbientTalk/2 Project
  3. * ATImport.java created on 6-mrt-2007 at 21:17:12
  4. * (c) Programming Technology Lab, 2006 - 2007
  5. * Authors: Tom Van Cutsem & Stijn Mostinckx
  6. *
  7. * Permission is hereby granted, free of charge, to any person
  8. * obtaining a copy of this software and associated documentation
  9. * files (the "Software"), to deal in the Software without
  10. * restriction, including without limitation the rights to use,
  11. * copy, modify, merge, publish, distribute, sublicense, and/or
  12. * sell copies of the Software, and to permit persons to whom the
  13. * Software is furnished to do so, subject to the following
  14. * conditions:
  15. *
  16. * The above copyright notice and this permission notice shall be
  17. * included in all copies or substantial portions of the Software.
  18. *
  19. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  20. * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  21. * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  22. * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  23. * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  24. * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  25. * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  26. * OTHER DEALINGS IN THE SOFTWARE.
  27. */
  28. package edu.vub.at.objects.grammar;
  29. import edu.vub.at.exceptions.InterpreterException;
  30. import edu.vub.at.objects.ATTable;
  31. /**
  32. * The public interface to a native AST component of the form
  33. * 'import <expression> (alias (symbol := symbol)+)? (exclude symbol (, symbol)*)?'
  34. *
  35. * Examples:
  36. * 'import o' => (import (symbol o) (table) (table))
  37. * 'import o alias foo := bar' => (import (symbol o) (table (table (symbol foo) (symbol bar))) (table))
  38. * 'import o exclude foo, bar:' => (import (symbol o) (table) (table (symbol foo) (symbol bar:)))
  39. * 'import o alias a: := b, c := d: exclude e, f =>
  40. * (import (symbol o) (table (table (sym a:) (sym b)) (table (sym c) (sym d:))) (table (sym e) (sym f)))
  41. *
  42. * @author tvcutsem
  43. */
  44. public interface ATImport extends ATStatement {
  45. /**
  46. * Example: <code>`{ import o }.statements[1].importedObjectExpression == `o</code>
  47. * @return the expression that should evaluate to the object to import.
  48. */
  49. public ATExpression base_getImportedObjectExpression() throws InterpreterException;
  50. /**
  51. * Example: <code>`{ import o alias foo := bar }.statements[1].aliasedSymbols == `[[foo, bar]]</code>
  52. * @return a table of pairs (tables of size two) of symbols that defines the mapping of symbols to alias.
  53. */
  54. public ATTable base_getAliasedSymbols() throws InterpreterException;
  55. /**
  56. * Example: <code>`{ import o exclude a, b }.statements[1].excludedSymbols == `[a,b]</code>
  57. * @return a table of symbols that represent the symbols to be excluded from the imported object.
  58. */
  59. public ATTable base_getExcludedSymbols() throws InterpreterException;
  60. }