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java.lang.Objectorg.apache.bsf.util.BSFEngineImpl
This is a base implementation of the BSFEngine interface which engine implementations may choose to extend to get the basic methods of the interface implemented.
| Field Summary | |
| protected  java.lang.ClassLoader | classLoader | 
| protected  java.lang.String | classPath | 
| protected  java.util.Vector | declaredBeans | 
| protected  java.lang.String | lang | 
| protected  BSFManager | mgr | 
| protected  java.lang.String | tempDir | 
| Constructor Summary | |
| BSFEngineImpl() | |
| 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)Default impl of apply - calls eval ignoring parameters and returns the result. | 
|  void | compileApply(java.lang.String source,
             int lineNo,
             int columnNo,
             java.lang.Object funcBody,
             java.util.Vector paramNames,
             java.util.Vector arguments,
             CodeBuffer cb)Default impl of compileApply - calls compileExpr ignoring parameters. | 
|  void | compileExpr(java.lang.String source,
            int lineNo,
            int columnNo,
            java.lang.Object expr,
            CodeBuffer cb)Default impl of compileExpr - generates code that'll create a new manager, evaluate the expression, and return the value. | 
|  void | compileScript(java.lang.String source,
              int lineNo,
              int columnNo,
              java.lang.Object script,
              CodeBuffer cb)Default impl of compileScript - generates code that'll create a new manager, and execute the script. | 
|  void | declareBean(BSFDeclaredBean bean)Declare a bean after the engine has been started. | 
|  void | exec(java.lang.String source,
     int lineNo,
     int columnNo,
     java.lang.Object script)Default impl of execute - calls eval and ignores the result. | 
|  void | iexec(java.lang.String source,
      int lineNo,
      int columnNo,
      java.lang.Object script)Default impl of interactive execution - calls eval and ignores the result. | 
|  void | initialize(BSFManager mgr,
           java.lang.String lang,
           java.util.Vector declaredBeans)initialize the engine; called right after construction by the manager. | 
|  void | propertyChange(java.beans.PropertyChangeEvent e)Receive property change events from the manager and update my fields as needed. | 
|  void | terminate()Graceful termination | 
|  void | undeclareBean(BSFDeclaredBean bean)Undeclare a previously declared bean. | 
| Methods inherited from class java.lang.Object | 
| clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait | 
| Methods inherited from interface org.apache.bsf.BSFEngine | 
| call, eval | 
| Field Detail | 
protected BSFManager mgr
protected java.lang.String lang
protected java.util.Vector declaredBeans
protected java.lang.String classPath
protected java.lang.String tempDir
protected java.lang.ClassLoader classLoader
| Constructor Detail | 
public BSFEngineImpl()
| Method Detail | 
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
apply in interface BSFEnginesource - (context info) the source of this expression
                 (e.g., filename)lineNo - (context info) the line number in source for exprcolumnNo - (context info) the column number in source for exprfuncBody - the multi-line, value returning script to evaluateparamNames - the names of the parameters above assumesarguments - values of the above parameters
BSFException - if anything goes wrong while doin' it.
public void compileApply(java.lang.String source,
                         int lineNo,
                         int columnNo,
                         java.lang.Object funcBody,
                         java.util.Vector paramNames,
                         java.util.Vector arguments,
                         CodeBuffer cb)
                  throws BSFException
compileApply in interface BSFEnginesource - (context info) the source of this expression
                 (e.g., filename)lineNo - (context info) the line number in source for exprcolumnNo - (context info) the column number in source for exprfuncBody - the multi-line, value returning script to evaluateparamNames - the names of the parameters above assumesarguments - values of the above parameterscb - the CodeBuffer to compile into
BSFException - if anything goes wrong while doin' it.
public void compileExpr(java.lang.String source,
                        int lineNo,
                        int columnNo,
                        java.lang.Object expr,
                        CodeBuffer cb)
                 throws BSFException
compileExpr in interface BSFEnginesource - (context info) the source of this expression
                 (e.g., filename)lineNo - (context info) the line number in source for exprcolumnNo - (context info) the column number in source for exprexpr - the expression to compilecb - the CodeBuffer to compile into
BSFException - if anything goes wrong while compiling a
            BSFException is thrown. The reason indicates the problem.
public void compileScript(java.lang.String source,
                          int lineNo,
                          int columnNo,
                          java.lang.Object script,
                          CodeBuffer cb)
                   throws BSFException
compileScript in interface BSFEnginesource - (context info) the source of this script
                 (e.g., filename)lineNo - (context info) the line number in source for scriptcolumnNo - (context info) the column number in source for scriptscript - the script to compilecb - the CodeBuffer to compile into
BSFException - if anything goes wrong while compiling a
            BSFException is thrown. The reason indicates the problem.
public void declareBean(BSFDeclaredBean bean)
                 throws BSFException
BSFEngine
declareBean in interface BSFEnginebean - the bean to declare
BSFException - if the engine cannot do this operation
public void exec(java.lang.String source,
                 int lineNo,
                 int columnNo,
                 java.lang.Object script)
          throws BSFException
exec in interface BSFEnginesource - (context info) the source of this expression
                 (e.g., filename)lineNo - (context info) the line number in source for exprcolumnNo - (context info) the column number in source for exprscript - the script to execute
BSFException - if anything goes wrong while exec'ing a
            BSFException is thrown. The reason indicates the problem.
public void iexec(java.lang.String source,
                  int lineNo,
                  int columnNo,
                  java.lang.Object script)
           throws BSFException
iexec in interface BSFEnginesource - (context info) the source of this expression
                 (e.g., filename)lineNo - (context info) the line number in source for exprcolumnNo - (context info) the column number in source for exprscript - the script to execute
BSFException - if anything goes wrong while exec'ing a
            BSFException is thrown. The reason indicates the problem.
public void initialize(BSFManager mgr,
                       java.lang.String lang,
                       java.util.Vector declaredBeans)
                throws BSFException
initialize in interface BSFEnginemgr - 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.
BSFException - if anything goes wrong while init'ing a
            BSFException is thrown. The reason indicates the problem.public void propertyChange(java.beans.PropertyChangeEvent e)
propertyChange in interface java.beans.PropertyChangeListenere - PropertyChange event with the change datapublic void terminate()
BSFEngine
terminate in interface BSFEngine
public void undeclareBean(BSFDeclaredBean bean)
                   throws BSFException
BSFEngine
undeclareBean in interface BSFEnginebean - the bean to undeclare
BSFException - if the engine cannot do this operation| 
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