org.apache.bsf.engines.javaclass
Class JavaClassEngine

java.lang.Object
  org.apache.bsf.util.BSFEngineImpl
      org.apache.bsf.engines.javaclass.JavaClassEngine

All Implemented Interfaces:

BSFEngine, java.util.EventListener, java.beans.PropertyChangeListener

public class JavaClassEngine

extends BSFEngineImpl

This is the interface to scripts consisting of Java objects from the Bean Scripting Framework.

Author:

Sanjiva Weerawarana

Field Summary

Fields inherited from class org.apache.bsf.util.BSFEngineImpl

classLoader, classPath, declaredBeans, lang, mgr, tempDir

Constructor Summary

JavaClassEngine()

Method Summary

java.lang.Object	call(java.lang.Object object, java.lang.String method, java.lang.Object[] args) call the named method of the given object.
java.lang.Object	eval(java.lang.String source, int lineNo, int columnNo, java.lang.Object oscript) This is used by an application to evaluate an object containing some expression - clearly not possible for compiled code ..

Methods inherited from class org.apache.bsf.util.BSFEngineImpl

apply, compileApply, compileExpr, compileScript, declareBean, exec, iexec, initialize, propertyChange, terminate, undeclareBean

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JavaClassEngine

public JavaClassEngine()

Method Detail

call

public java.lang.Object call(java.lang.Object object,
                             java.lang.String method,
                             java.lang.Object[] args)
                      throws BSFException

call the named method of the given object. If object is an instance of Class, then the call is a static call on that object. If not, its an instance method call or a static call (as per Java) on the given object.

Parameters:

object - object on which to make the call

method - name of the method / procedure to call

args - the arguments to be given to the procedure

Throws:

BSFException - if anything goes wrong while eval'ing a BSFException is thrown. The reason indicates the problem.

eval

public java.lang.Object eval(java.lang.String source,
                             int lineNo,
                             int columnNo,
                             java.lang.Object oscript)
                      throws BSFException

This is used by an application to evaluate an object containing some expression - clearly not possible for compiled code ..

Parameters:

source - (context info) the source of this expression (e.g., filename)

lineNo - (context info) the line number in source for expr

columnNo - (context info) the column number in source for expr

oscript - the expression to evaluate

Throws:

BSFException - if anything goes wrong while eval'ing a BSFException is thrown. The reason indicates the problem.