RE: [Jython-users] Newbie question

[Danny A. <dan...@bt...>]

I'm guessing, but it might be worth trying to cast the Serializable into an
object before putting it in the hashtable.

---
Danny Ayers
http://www.isacat.net

>-----Original Message-----
>From: jyt...@li...
>[mailto:jyt...@li...]On Behalf Of James
>House
>Sent: 15 June 2001 23:29
>To: jyt...@li...
>Subject: [Jython-users] Newbie question
>
>
>
>Hi,
>
>So far I think Jython is pretty cool... but I've got a problem/question...
>
>First off, here's my sample code:
>
>"MyMap.java"
>===========================================
>import java.io.Serializable;
>import java.util.HashMap;
>
>public
>class MyMap
>{
>   private HashMap hash = new HashMap(10);
>
>   public
>   void MyMap()
>   {
>   }
>
>   public
>   void setAttribute(String key, Object attr)
>   {
>     hash.put(key, attr);
>   }
>
>   public
>   Object getAtrribute(String key)
>   {
>     return hash.get(key);
>   }
>
>   public static
>   void main(String[] args)
>   {
>     Properties props = new Properties();
>     props.setProperty("jython.home", "/jython");
>     PythonInterpreter.initialize(System.getProperties(),props,new
>String[0]);
>
>     MyMap theMap = new MyMap();
>
>     theMap.setAttribute("myAttr", "myAttr is cool");
>
>     PythonInterpreter interp = new PythonInterpreter();
>     interp.set("theMap", theMap);
>
>     interp.exec("print theMap.getAtrribute(\"myAttr\")");
>     interp.exec("theMap.setAttribute(\"crapKey\", \"crapVal\")");
>
>     MyMap newMap = (MyMap)interp.get("theMap", MyMap.class);
>     System.err.println("GotBack: " +
>(String)newMap.getAtrribute("crapKey"));
>
>   }
>}
>
>========================================
>
>This works just fine, as intended by printing
>the output:
>
>	myAttr is cool
>	GotBack: crapVal
>
>
>My problem is that I really need the method
>
>   void setAttribute(String key, Object attr)
>
>to be this:
>
>   void setAttribute(String key, Serializable attr)
>
>But when I make that change, rather than the
>expected output, I get:
>
>	myAttr is cool
>	Exception in thread "main" java.lang.ClassCastException:
>org.python.core.PyString
>         		at
>com.partnet.prototypes.mops.unittest.MyMap.main(MyMap.java:72)
>
>
>Can someone explain this to me? I really need
>to restrict the input objects to be of type Serializable.
>
>Thanks,
>James
>
>
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