PyFinalizableInstance


1   // Copyright (c) Corporation for National Research Initiatives
2   // These are just like normal instances, except that their classes included
3   // a definition for __del__(), i.e. Python's finalizer.  These two instance
4   // types have to be separated due to Java performance issues.
5   
6   package org.python.core;
7   
8   
9   /**
10   * A python class instance with __del__ defined.
11   * <p>
12   * This is a special class due to performance. Defining
13   * finalize() on a class, makes the class a lot slower.
14   */
15  
16  public class PyFinalizableInstance extends PyInstance
17  {
18      public PyFinalizableInstance(PyClass iclass) {
19          super(iclass);
20      }
21  
22      // __del__ method is invoked upon object finalization.
23      protected void finalize() {
24          try {
25              instclass.__del__.__call__(this);
26          } catch (PyException exc) {
27              // Try to get the right method description.
28              PyObject method = instclass.__del__;
29              try {
30                  method = __findattr__("__del__");
31              } catch (PyException e) { ; }
32  
33              Py.stderr.println("Exception " +
34                  Py.formatException(exc.type, exc.value, exc.traceback) +
35                  " in " + method +
36                  " ignored");
37          }
38      }
39  }
40

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