software/no.uio.ifi.refaktor/src/no/uio/ifi/refaktor/utils/CompilationUnitCacheManager.java

   1 package no.uio.ifi.refaktor.utils;
   2
   3 import org.eclipse.jdt.core.ICompilationUnit;
   4 import org.eclipse.jdt.core.dom.ASTParser;
   5 import org.eclipse.jdt.core.dom.CompilationUnit;
   6
   7 public enum CompilationUnitCacheManager {
   8         INSTANCE;
   9
  10         private CompilationUnitCache cache = new CompilationUnitNullCache();
  11
  12         public static CompilationUnit getParsedCompilationUnitFor(ICompilationUnit unit) {
  13                 return INSTANCE.getCompilationUnitFor(unit);
  14         }
  15
  16         private CompilationUnit getCompilationUnitFor(ICompilationUnit unit) {
  17                 if (cache.contains(unit))
  18                         return cache.get(unit);
  19
  20                 return parse(unit);
  21         }
  22
  23         private CompilationUnit parse(ICompilationUnit unit) {
  24                 ASTParser parser = ParseUtils.createParser();
  25                 parser.setSource(unit);
  26                 CompilationUnit concreteCompilationUnit = (CompilationUnit) parser.createAST(null);
  27                 cache.add(unit, concreteCompilationUnit);
  28                 return concreteCompilationUnit;
  29         }
  30
  31         public static void activateHashCaching() {
  32                 INSTANCE.cache = new CompilationUnitHashCache();
  33         }
  34
  35         public static void activateRecentlyUsedCaching() {
  36                 INSTANCE.cache = new CompilationUnitRecentlyUsedCache();
  37         }
  38
  39         public static void deactivateCaching() {
  40                 INSTANCE.cache = new CompilationUnitNullCache();
  41         }
  42 }