public Object apply(String source,
    int lineNo,
    int columnNo,
    Object funcBody,
    Vector paramNames,
    Vector arguments) throws BSFException
This is used by an application to invoke an anonymous function. An
anonymous function is a multi-line script which when evaluated will
produce a value. These are separated from expressions and scripts
because the prior are spsed to be good 'ol expressions and scripts
are not value returning. We allow anonymous functions to have parameters
as well for completeness.

 public Object call(Object object,
    String name,
    Object[] args) throws BSFException
This is used by an application to call into the scripting engine
to make a function/method call. The "object" argument is the object
whose method is to be called, if that applies. For non-OO languages,
this is typically ignored and should be given as null. For pretend-OO
languages such as VB, this would be the (String) name of the object.
The arguments are given in the args array.

 public  void compileApply(String source,
    int lineNo,
    int columnNo,
    Object funcBody,
    Vector paramNames,
    Vector arguments,
    CodeBuffer cb) throws BSFException
This is used by an application to compile an anonymous function. See
comments in apply for more hdetails.

 public  void compileExpr(String source,
    int lineNo,
    int columnNo,
    Object expr,
    CodeBuffer cb) throws BSFException
This is used by an application to compile a value-returning expression.
The expr may be string or some other type, depending on the language.
The generated code is dumped into the CodeBuffer.

 public  void compileScript(String source,
    int lineNo,
    int columnNo,
    Object script,
    CodeBuffer cb) throws BSFException
This is used by an application to compile some script. The
script may be string or some other type, depending on the
language. The generated code is dumped into the CodeBuffer.

 public  void declareBean(BSFDeclaredBean bean) throws BSFException
Declare a bean after the engine has been started. Declared beans
are beans that are named and which the engine must make available
to the scripts it runs in the most first class way possible.

 public Object eval(String source,
    int lineNo,
    int columnNo,
    Object expr) throws BSFException
This is used by an application to evaluate an expression. The
expression may be string or some other type, depending on the
language. (For example, for BML it'll be an org.w3c.dom.Element
object.)

 public  void exec(String source,
    int lineNo,
    int columnNo,
    Object script) throws BSFException
This is used by an application to execute some script. The
expression may be string or some other type, depending on the
language. Returns nothing but if something goes wrong it excepts
(of course).

 public  void iexec(String source,
    int lineNo,
    int columnNo,
    Object script) throws BSFException
This is used by an application to execute some script, as though
one were interacting with the language in an interactive session.
The expression may be string or some other type, depending on the
language. Returns nothing but if something goes wrong it excepts (of
course).

 public  void initialize(BSFManager mgr,
    String lang,
    Vector declaredBeans) throws BSFException
This method is used to initialize the engine right after construction.
This method will be called before any calls to eval or call. At this
time the engine should capture the current values of interesting
properties from the manager. In the future, any changes to those
will be mirrored to me by the manager via a property change event.

 public  void terminate()
Graceful termination

 public  void undeclareBean(BSFDeclaredBean bean) throws BSFException
Undeclare a previously declared bean.