| 摘要 |
<p>A data processing apparatus for providing an object-oriented execution environment, such as a virtual machine operable for first and second versions of the same class is disclosed. The data processing apparatus communicates with first and second services respectively operative for first and second versions of the same class. However, the first service is allowed to communicate only with a first version execution environment, and the second service is allowed to communicate only with a second version execution environment. The data processing apparatus is configured so that different versions of a class can share data or information between them.</p> |
