[CTJUG Forum] Re: JSP path issues

[Keith . Ross]

Hi,

I am trying to write a Java object into the directory server. Now
according to the URL
http://java.sun.com/products/jndi/tutorial/objects/storing/ there are at
least three approaches to do this. The one I have opted is to use Java
serializable objects. Now I believe that my serialization works fine
because I have serialized the object in question and then deserialized
it. I have made the necessary checks like whether the object serialized
is the same as the one deserilized.

My biggest problem is in writing the serialized object into the
directory server. According to the literature I need a Directory Context
type (Interface DirContext) and the necessary attributes for the
serialized object to be able to do this. My attempt is as follows:

public DirContext getDirContext(String bindDN, String bindPassword)
throws NamingException {
    Hashtable env = new Hashtable();
    env.put(Context.INITIAL_CONTEXT_FACTORY,
"com.sun.jndi.ldap.LdapCtxFactory");
    env.put(Context.PROVIDER_URL,
"ldap://MMatyila_PIV.mrc.ac.za:389/");
    env.put(Context.SECURITY_AUTHENTICATION, "Simple");
    env.put(Context.SECURITY_PRINCIPAL, bindDN);
    env.put(Context.SECURITY_CREDENTIALS, bindPassword);
    DirContext ctx = new InitialDirContext(env);
    return ctx;
}

for the directory context, and for the necessary attributes for the
serialized object I have:

public BasicAttributes getSerializationAttributes(String className,
String serializedData) {
    BasicAttributes attrs = new BasicAttributes(true);

    attrs.put("objectclass", "top");
    attrs.put("objectclass", "javaObject");
    attrs.put("objectclass", "javaserializedobject");

    attrs.put("javaclassname", className);
    attrs.put("javaserializeddata", serializedData);

    return attrs;
}

Now when I read this object from the directory serve I get an object
which I cannot cast to anything sensible. I am not sure where exactly my
problem lies but I would appreciate any assistance.

Regards,
Muzi Matyila
Medical Research Council, Cape Town
South Africa