Examples of org.apache.velocity.exception.VelocityException

org.apache.velocity.exception.VelocityException
Base class for Velocity exceptions thrown to the application layer. @author Kyle F. Downey @version $Id: VelocityException.java 291683 2005-09-26 17:25:44Z henning $

        {
              props = new ExtendedProperties(fileName);
        } 
        catch (IOException e)
        {
              throw new VelocityException("Error reading properties from '" 
                + fileName + "'", e);
        }
        
        Enumeration en = props.keys();
        while (en.hasMoreElements())

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        {
            setProperties(new ExtendedProperties(configurationFile));
        } 
        catch (IOException e)
        {
            throw new VelocityException("Error reading properties from '" 
                + configurationFile + "'", e);
        }
        init();
    }

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            catch (ClassNotFoundException cnfe )
            {
                String err = "The specified class for ResourceManager (" + rm
                    + ") does not exist or is not accessible to the current classloader.";
                log.error(err);
                throw new VelocityException(err, cnfe);
            }
            catch (InstantiationException ie)
            {
              throw new VelocityException("Could not instantiate class '" + rm + "'", ie);
            }
            catch (IllegalAccessException ae)
            {
              throw new VelocityException("Cannot access class '" + rm + "'", ae);
            }


            if (!(o instanceof ResourceManager))
            {
                String err = "The specified class for ResourceManager (" + rm
                    + ") does not implement " + ResourceManager.class.getName()
                    + "; Velocity is not initialized correctly.";


                log.error(err);
                throw new VelocityException(err);
            }


            resourceManager = (ResourceManager) o;


            resourceManager.initialize(this);
         }
         else
         {
            /*
             *  someone screwed up.  Lets not fool around...
             */


            String err = "It appears that no class was specified as the"
            + " ResourceManager.  Please ensure that all configuration"
            + " information is correct.";


            log.error(err);
            throw new VelocityException( err );
        }
    }

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            {
                String err = "The specified class for "
                    + paramName + " (" + classname
                    + ") does not exist or is not accessible to the current classloader.";
                log.error(err);
                throw new VelocityException(err, cnfe);
            }
            catch (InstantiationException ie)
            {
              throw new VelocityException("Could not instantiate class '" + classname + "'", ie);
            }
            catch (IllegalAccessException ae)
            {
              throw new VelocityException("Cannot access class '" + classname + "'", ae);
            }


            if (!EventHandlerInterface.isAssignableFrom(EventHandlerInterface))
            {
                String err = "The specified class for " + paramName + " ("
                    + classname + ") does not implement "
                    + EventHandlerInterface.getName()
                    + "; Velocity is not initialized correctly.";


                log.error(err);
                throw new VelocityException(err);
            }


            EventHandler ev = (EventHandler) o;
            if ( ev instanceof RuntimeServicesAware )
                ((RuntimeServicesAware) ev).setRuntimeServices(this);

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        {
            LogManager.updateLog(this.log, this);
        } 
        catch (Exception e)
        {
            throw new VelocityException("Error initializing log: " + e.getMessage(), e);
        }
    }

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        {
            inputStream = getClass().getResourceAsStream('/' + DEFAULT_RUNTIME_DIRECTIVES);


            if (inputStream == null)
            {
                throw new VelocityException("Error loading directive.properties! " +
                                    "Something is very wrong if these properties " +
                                    "aren't being located. Either your Velocity " +
                                    "distribution is incomplete or your Velocity " +
                                    "jar file is corrupted!");
            }

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            else
            {
                String msg = directiveClass + " does not implement "
                    + Directive.class.getName() + "; it cannot be loaded.";
                log.error(msg);
                throw new VelocityException(msg);
            }
        }
        // The ugly threesome:  ClassNotFoundException,
        // IllegalAccessException, InstantiationException.
        // Ignore Findbugs complaint for now.
        catch (Exception e)
        {
            String msg = "Failed to load Directive: " + directiveClass;
            log.error(msg, e);
            throw new VelocityException(msg, e);
        }
    }

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            {
                String err = "The specified class for ParserPool ("
                    + pp
                    + ") does not exist (or is not accessible to the current classloader.";
                log.error(err);
                throw new VelocityException(err, cnfe);
            }
            catch (InstantiationException ie)
            {
              throw new VelocityException("Could not instantiate class '" + pp + "'", ie);
            }
            catch (IllegalAccessException ae)
            {
              throw new VelocityException("Cannot access class '" + pp + "'", ae);
            }


            if (!(o instanceof ParserPool))
            {
                String err = "The specified class for ParserPool ("
                    + pp + ") does not implement " + ParserPool.class
                    + " Velocity not initialized correctly.";


                log.error(err);
                throw new VelocityException(err);
            }


            parserPool = (ParserPool) o;


            parserPool.initialize(this);
        }
        else
        {
            /*
             *  someone screwed up.  Lets not fool around...
             */


            String err = "It appears that no class was specified as the"
                + " ParserPool.  Please ensure that all configuration"
                + " information is correct.";


            log.error(err);
            throw new VelocityException( err );
        }


    }

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            }
            catch(Exception e)
            {
                String msg = "RuntimeInstance.render(): init exception for tag = "+logTag;
                getLog().error(msg, e);
                throw new VelocityException(msg, e);
            }


            try
            {
                if (provideEvaluateScope)
                {
                    Object previous = ica.get(evaluateScopeName);
                    context.put(evaluateScopeName, new Scope(this, previous));
                }
                nodeTree.render(ica, writer);
            }
            catch (StopCommand stop)
            {
                if (!stop.isFor(this))
                {
                    throw stop;
                }
                else if (getLog().isDebugEnabled())
                {
                    getLog().debug(stop.getMessage());
                }
            }
            catch (IOException e)
            {
                throw new VelocityException("IO Error in writer: " + e.getMessage(), e);
            }
        }
        finally
        {
            ica.popCurrentTemplateName();

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        if (!isVelocimacro(vmName, logTag))
        {
            String msg = "RuntimeInstance.invokeVelocimacro() : VM '" + vmName
                         + "' is not registered.";
            getLog().error(msg);
            throw new VelocityException(msg);
        }


        /* now just create the VM call, and use evaluate */
        StrBuilder template = new StrBuilder("#");
        template.append(vmName);

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