IsSame


1   /*  Copyright (c) 2000-2004 jMock.org
2    */
3   package org.jmock.core.constraint;
4   
5   import org.jmock.core.Constraint;
6   
7   
8   /**
9    * Is the value the same object as another value?
10   */
11  public class IsSame implements Constraint
12  {
13      private Object   object;
14  
15      /**
16       * Creates a new instance of IsSame
17       *
18       * @param object The predicate evaluates to true only when the argument is
19       *               this object.
20       */
21      public IsSame( Object   object ) {
22          this.object = object;
23      }
24  
25      public boolean eval( Object   arg ) {
26          return arg == object;
27      }
28  
29      public StringBuffer   describeTo( StringBuffer   buffer ) {
30          buffer.append("same(");
31          if (object == null) {
32              buffer.append("null");
33          } else {
34              buffer.append("<");
35              buffer.append(object);
36              buffer.append(">");
37          }
38          buffer.append(")");
39  
40          return buffer;
41      }
42  }
43

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