com.judoscript
Class BSFJudoEngine

java.lang.Object
  org.apache.bsf.util.BSFEngineImpl
      com.judoscript.BSFJudoEngine

All Implemented Interfaces:

java.beans.PropertyChangeListener, java.util.EventListener, org.apache.bsf.BSFEngine

public class BSFJudoEngine
extends org.apache.bsf.util.BSFEngineImpl

This is the interface for BSF. Need to have IBM's BSF package in the classpath.

Field Summary

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

classLoader, classPath, declaredBeans, lang, mgr, tempDir

Constructor Summary

BSFJudoEngine()

Method Summary

java.lang.Object	call(java.lang.Object object, java.lang.String fxn, java.lang.Object[] args) Calls a function.
void	declareBean(org.apache.bsf.BSFDeclaredBean bean) Declare a bean.
java.lang.Object	eval(java.lang.String source, int lineNo, int columnNo, java.lang.Object script) Evaluates an expression.
void	exec(java.lang.String source, int lineNo, int columnNo, java.lang.Object script) Executes a script.
void	initialize(org.apache.bsf.BSFManager mgr, java.lang.String lang, java.util.Vector declaredBeans) Initializes the engine.
void	undeclareBean(org.apache.bsf.BSFDeclaredBean bean) Undeclare a previously declared bean.

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

apply, compileApply, compileExpr, compileScript, iexec, propertyChange, terminate

Methods inherited from class java.lang.Object

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

Constructor Detail

BSFJudoEngine

public BSFJudoEngine()

Method Detail

initialize

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

Initializes the engine. Establishes the one and only $$bsf object in JudoScript, and sets all the declared beans as global variables.

Specified by:

initialize in interface org.apache.bsf.BSFEngine

Overrides:

initialize in class org.apache.bsf.util.BSFEngineImpl

Parameters:

mgr - the BSF manager.

lang - always "judoscript".

declaredBeans - objects to set during initialization; elements are instances of com.ibm.bsf.DeclaredBean.

Throws:

org.apache.bsf.BSFException

eval

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

Evaluates an expression.

Parameters:

source - the file name of the expression; not used.

lineNo - the line number in the file; not used.

columnNo - the column number in the file; not used.

script - the expression; should be a String.

Returns:

the result of the expression.

Throws:

org.apache.bsf.BSFException

exec

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

Executes a script.

Specified by:

exec in interface org.apache.bsf.BSFEngine

Overrides:

exec in class org.apache.bsf.util.BSFEngineImpl

Parameters:

source - the file name of the expression; not used.

lineNo - the line number in the file; not used.

columnNo - the column number in the file; not used.

script - the script code; should be a String.

Throws:

org.apache.bsf.BSFException

call

public java.lang.Object call(java.lang.Object object,
                             java.lang.String fxn,
                             java.lang.Object[] args)
                      throws org.apache.bsf.BSFException

Calls a function. (Calling object's methods is not supported.)

Parameters:

object - is the name of the object; not used.

fxn - the function name.

args - the arguments.

Returns:

the result.

Throws:

org.apache.bsf.BSFException

declareBean

public void declareBean(org.apache.bsf.BSFDeclaredBean bean)
                 throws org.apache.bsf.BSFException

Declare a bean. Sets the bean as a global variable in JudoScript.

Specified by:

declareBean in interface org.apache.bsf.BSFEngine

Overrides:

declareBean in class org.apache.bsf.util.BSFEngineImpl

Throws:

org.apache.bsf.BSFException

undeclareBean

public void undeclareBean(org.apache.bsf.BSFDeclaredBean bean)
                   throws org.apache.bsf.BSFException

Undeclare a previously declared bean. Removes the named global variable from JudoScript.

Specified by:

undeclareBean in interface org.apache.bsf.BSFEngine

Overrides:

undeclareBean in class org.apache.bsf.util.BSFEngineImpl

Throws:

org.apache.bsf.BSFException