UtilCompatibleJdk14


1   /*
2   // $Id: //open/mondrian/src/main/mondrian/util/UtilCompatibleJdk14.java#1 $
3   // This software is subject to the terms of the Common Public License
4   // Agreement, available at the following URL:
5   // http://www.opensource.org/licenses/cpl.html.
6   // Copyright (C) 2007-2007 Julian Hyde
7   // All Rights Reserved.
8   // You must accept the terms of that agreement to use this software.
9   */
10  package mondrian.util;
11  
12  import java.util.Set  ;
13  import java.util.HashSet  ;
14  import java.util.Arrays  ;
15  
16  /**
17   * Implementation of {@link UtilCompatible} which runs in
18   * JDK 1.4.
19   *
20   * <p>The code uses JDK 1.5 constructs such as generics and for-each loops,
21   * but retroweaver can convert these. It does not use
22   * <code>java.util.EnumSet</code>, which is important, because retroweaver has
23   * trouble with this.
24   *
25   * @author jhyde
26   * @version $Id: //open/mondrian/src/main/mondrian/util/UtilCompatibleJdk14.java#1 $
27   * @since Feb 5, 2007
28   */
29  public class UtilCompatibleJdk14 implements UtilCompatible {
30      public <E extends Enum  <E>> Set  <E> enumSetOf(E first, E... rest) {
31          HashSet  <E> set = new HashSet  <E>();
32          set.add(first);
33          for (E e : rest) {
34              set.add(e);
35          }
36          return set;
37      }
38  
39      public <E extends Enum  <E>> Set  <E> enumSetNoneOf(Class  <E> elementType) {
40          return new HashSet  <E>();
41      }
42  
43      public <E extends Enum  <E>> Set  <E> enumSetAllOf(Class  <E> elementType) {
44          return new HashSet  <E>(Arrays.asList(elementType.getEnumConstants()));
45      }
46  }
47  
48  // End UtilCompatibleJdk14.java
49
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