Class JavaScriptEngine

java.lang.Object
org.apache.bsf.util.BSFEngineImpl
org.apache.bsf.engines.javascript.JavaScriptEngine
All Implemented Interfaces:
PropertyChangeListener, EventListener, BSFEngine

public class JavaScriptEngine extends BSFEngineImpl
This is the interface to Netscape's Rhino (JavaScript) from the Bean Scripting Framework.

The original version of this code was first written by Adam Peller for use in LotusXSL. Sanjiva took his code and adapted it for BSF.

Author:
Adam Peller <peller@lotus.com>, Sanjiva Weerawarana, Matthew J. Duftler, Norris Boyd
  • Constructor Details

    • JavaScriptEngine

      public JavaScriptEngine()
  • Method Details

    • call

      public Object call(Object object, String method, Object[] args) throws BSFException
      Return an object from an extension.
      Parameters:
      object - Object on which to make the call (ignored).
      method - The name of the method to call.
      args - an array of arguments to be passed to the extension, which may be either Vectors of Nodes, or Strings.
      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
      Description copied from interface: BSFEngine
      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.
      Specified by:
      declareBean in interface BSFEngine
      Overrides:
      declareBean in class BSFEngineImpl
      Parameters:
      bean - the bean to declare
      Throws:
      BSFException - if the engine cannot do this operation
    • eval

      public Object eval(String source, int lineNo, int columnNo, Object oscript) throws BSFException
      This is used by an application to evaluate a string containing some 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
      oscript - the expression to evaluate
      Throws:
      BSFException - if anything goes wrong while eval'ing a BSFException is thrown. The reason indicates the problem.
    • initialize

      public void initialize(BSFManager mgr, String lang, Vector declaredBeans) throws BSFException
      Initialize the engine. Put the manager into the context-manager map hashtable too.
      Specified by:
      initialize in interface BSFEngine
      Overrides:
      initialize in class BSFEngineImpl
      Parameters:
      mgr - The BSFManager that's hosting this engine.
      lang - Language string which this engine is handling.
      declaredBeans - Vector of BSFDeclaredObject containing beans that should be declared into the language runtime at init time as best as possible.
      Throws:
      BSFException - if anything goes wrong while init'ing a BSFException is thrown. The reason indicates the problem.
    • undeclareBean

      public void undeclareBean(BSFDeclaredBean bean) throws BSFException
      Description copied from interface: BSFEngine
      Undeclare a previously declared bean.
      Specified by:
      undeclareBean in interface BSFEngine
      Overrides:
      undeclareBean in class BSFEngineImpl
      Parameters:
      bean - the bean to undeclare
      Throws:
      BSFException - if the engine cannot do this operation