org.apache.bsf.engines.jython
Class JythonEngine

java.lang.Object
  org.apache.bsf.util.BSFEngineImpl
      org.apache.bsf.engines.jython.JythonEngine

All Implemented Interfaces:

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

public class JythonEngine

extends BSFEngineImpl

This is the interface to Jython (http://www.jython.org/) from BSF. It's derived from the JPython 1.x engine

Author:

Sanjiva Weerawarana, Finn Bock , Chuck Murcko

Field Summary

(package private) org.apache.bsf.engines.jython.JythonEngine.BSFPythonInterpreter

interp

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

classLoader, classPath, declaredBeans, lang, mgr, tempDir

Constructor Summary

JythonEngine()

Method Summary

java.lang.Object	apply(java.lang.String source, int lineNo, int columnNo, java.lang.Object funcBody, java.util.Vector paramNames, java.util.Vector arguments) Evaluate an anonymous function (differs from eval() in that apply() handles multiple lines).
java.lang.Object	call(java.lang.Object object, java.lang.String method, java.lang.Object[] args) call the named method of the given object.
void	declareBean(BSFDeclaredBean bean) Declare a bean
java.lang.Object	eval(java.lang.String source, int lineNo, int columnNo, java.lang.Object script) Evaluate an expression.
void	exec(java.lang.String source, int lineNo, int columnNo, java.lang.Object script) Execute a script.
void	iexec(java.lang.String source, int lineNo, int columnNo, java.lang.Object script) Execute script code, emulating console interaction.
void	initialize(BSFManager mgr, java.lang.String lang, java.util.Vector declaredBeans) Initialize the engine.
void	undeclareBean(BSFDeclaredBean bean) Undeclare a previously declared bean.
java.lang.Object	unwrap(org.python.core.PyObject result)

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

compileApply, compileExpr, compileScript, propertyChange, terminate

Methods inherited from class java.lang.Object

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

Field Detail

interp

org.apache.bsf.engines.jython.JythonEngine.BSFPythonInterpreter interp

Constructor Detail

JythonEngine

public JythonEngine()

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.

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.

declareBean

public void declareBean(BSFDeclaredBean bean)
                 throws BSFException

Declare a bean

Specified by:

declareBean in interface BSFEngine

Overrides:

declareBean in class BSFEngineImpl

Throws:

BSFException

apply

public java.lang.Object apply(java.lang.String source,
                              int lineNo,
                              int columnNo,
                              java.lang.Object funcBody,
                              java.util.Vector paramNames,
                              java.util.Vector arguments)
                       throws BSFException

Evaluate an anonymous function (differs from eval() in that apply() handles multiple lines).

Specified by:

apply in interface BSFEngine

Overrides:

apply in class BSFEngineImpl

Throws:

BSFException

eval

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

Evaluate an expression.

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

script - the expression to evaluate

Throws:

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

exec

public void exec(java.lang.String source,
                 int lineNo,
                 int columnNo,
                 java.lang.Object script)
          throws BSFException

Execute a script.

Specified by:

exec in interface BSFEngine

Overrides:

exec in class BSFEngineImpl

Throws:

BSFException

iexec

public void iexec(java.lang.String source,
                  int lineNo,
                  int columnNo,
                  java.lang.Object script)
           throws BSFException

Execute script code, emulating console interaction.

Specified by:

iexec in interface BSFEngine

Overrides:

iexec in class BSFEngineImpl

Throws:

BSFException

initialize

public void initialize(BSFManager mgr,
                       java.lang.String lang,
                       java.util.Vector declaredBeans)
                throws BSFException

Initialize the engine.

Specified by:

initialize in interface BSFEngine

Overrides:

initialize in class BSFEngineImpl

Throws:

BSFException

undeclareBean

public void undeclareBean(BSFDeclaredBean bean)
                   throws BSFException

Undeclare a previously declared bean.

Specified by:

undeclareBean in interface BSFEngine

Overrides:

undeclareBean in class BSFEngineImpl

Throws:

BSFException

unwrap

public java.lang.Object unwrap(org.python.core.PyObject result)