Examples of org.apache.bsf.BSFException

org.apache.bsf.BSFException
If something goes wrong while doing some scripting stuff, one of these is thrown. The integer code indicates what's wrong and the message may give more details. The reason one exception with multiple meanings (via the code) [instead of multiple exception types] is used is due to the interest to keep the run-time size small. @author Sanjiva Weerawarana

            if(javaclass != null) {
                classname=javaclass.getName();
            } else {
                gf = openUniqueFile(tempDir, "BSFJava",".java");
                if( gf == null) {
                    throw new BSFException("couldn't create JavaEngine scratchfile");
                }
                // Obtain classname
                classname = gf.className;
                
                // Write the kluge header to the file.
                gf.fos.write(("import java.lang.*;"+
                        "import java.util.*;"+
                        "public class "+classname+" {\n" +
                "  static public Object BSFJavaEngineEntry(org.apache.bsf.BSFManager bsf) {\n")
                .getBytes());
                
                // Edit the script to replace placeholder with the generated
                // classname. Note that this occurs _after_ the cache was checked!
                int startpoint = script.indexOf(placeholder);
                int endpoint;
                if(startpoint >= 0) {
                    StringBuffer changed = new StringBuffer();
                    for(; startpoint >=0; startpoint = script.indexOf(placeholder,startpoint)) {
                        changed.setLength(0);  // Reset for 2nd pass or later
                        if(startpoint > 0) {
                            changed.append(script.substring(0,startpoint));
                        }
                        changed.append(classname);
                        endpoint = startpoint+placeholder.length();
                        if(endpoint < script.length()) {
                            changed.append(script.substring(endpoint));
                        }
                        script = changed.toString();
                    }
                }
                
                // MJD - debug
//              BSFDeclaredBean tempBean;
//              String          className;
//              
//              for (int i = 0; i < declaredBeans.size (); i++) {
//              tempBean  = (BSFDeclaredBean) declaredBeans.elementAt (i);
//              className = StringUtils.getClassName (tempBean.bean.getClass ());
//              
//              gf.fos.write ((className + " " +
//              tempBean.name + " = (" + className +
//              ")bsf.lookupBean(\"" +
//              tempBean.name + "\");").getBytes ());
//              }
                // MJD - debug
                
                // Copy the input to the file.
                // Assumes all available -- probably mistake, but same as other engines.
                gf.fos.write(script.getBytes());
                // Close the method and class
                gf.fos.write(("\n  }\n}\n").getBytes());
                gf.fos.close();
                
                // Compile through Java to .class file
                // May not be threadsafe. Serialize access on static object:
                synchronized(serializeCompilation) {
                    JavaUtils.JDKcompile(gf.file.getPath(), classPath);
                }
                
                // Load class.
                javaclass = EngineUtils.loadClass(mgr, classname);
                
                // Stash class for reuse
                codeToClass.put(basescript, javaclass);
            }
            
            Object[] callArgs = {mgr};      
            retval = internalCall(this,"BSFJavaEngineEntry",callArgs);
        }
        
        
        catch(Exception e) {
            e.printStackTrace ();
            throw new BSFException (BSFException.REASON_IO_ERROR, e.getMessage ());
        } finally {
            // Cleanup: delete the .java and .class files
            
//          if(gf!=null && gf.file!=null && gf.file.exists())
//          gf.file.delete();  // .java file

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                Method m = MethodUtils.getMethod(javaclass, method, argtypes);
                retval = m.invoke(null, args);
            }
        }
        catch(Exception e) {
            throw new BSFException (BSFException.REASON_IO_ERROR, e.getMessage ());
        }
        return retval;
    }

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            // corrected the situation by aborting the loop and
            // a long stacktrace would end up on the user's console
            throw (Error) t;
        }
        else {
            throw new BSFException(BSFException.REASON_OTHER_ERROR,
                                   "JavaScript Error: " + message,
                                   target);
        }
    }

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        try {
            ReflectionUtils.addEventListener (bean, eventSetName, ep);
        } catch (Exception e) {
            e.printStackTrace ();
            throw new BSFException (BSFException.REASON_OTHER_ERROR,
                                    "ouch while adding event listener: "
                                    + e, e);
        }
    }

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        try {
            ReflectionUtils.addEventListener (bean, eventSetName, ep);
        } catch (Exception e) {
            e.printStackTrace ();
            throw new BSFException (BSFException.REASON_OTHER_ERROR,
                                    "ouch while adding event listener: "
                                    + e, e);
        }
    }

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        } catch (Exception e) {
            // something went wrong while invoking method
            Throwable t = (e instanceof InvocationTargetException) ?
                          ((InvocationTargetException)e).getTargetException () :
                          null;
            throw new BSFException (BSFException.REASON_OTHER_ERROR,
                                    "method invocation failed: " + e +
                                    ((t==null) ? "" :
                                     (" target exception: " + t)), t);
        }
    }

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                    // throw the previous exception
                    throw me;
                }
            }
        } catch (Exception e) {
            throw new BSFException (BSFException.REASON_OTHER_ERROR,
                                    e.getMessage (), e);
        }
    }

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                if (bsfCL == null)
                    bsfCL = new BSFClassLoader ();
                bsfCL.setTempDir (mgr.getTempDir ());
                return bsfCL.loadClass (name);
            } catch (ClassNotFoundException e2) {
                throw new BSFException (BSFException.REASON_OTHER_ERROR,
                        "unable to load class '" + name + "':" + e, e);
            }
        }
    }

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                jExpr = ScriptFactory.createScript((String) expr);
            }
            return jExpr.execute(jc);
        } catch (Exception e) {
            // TODO Better messages
            throw new BSFException(e.getMessage());
        }
    }

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            } else {
                jExpr = ScriptFactory.createScript((String) script);
            }
            jExpr.execute(jc);
        } catch (Exception e) {
            throw new BSFException(e.getMessage());
        }
    }

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