ro.isdc.wro.model.resource.processor.decorator
Class ExceptionHandlingProcessorDecorator

java.lang.Object
  ro.isdc.wro.util.AbstractDecorator<T>
      ro.isdc.wro.model.resource.processor.decorator.AbstractProcessorDecoratorSupport<ResourcePreProcessor>
          ro.isdc.wro.model.resource.processor.decorator.ProcessorDecorator
              ro.isdc.wro.model.resource.processor.decorator.ExceptionHandlingProcessorDecorator

All Implemented Interfaces:

ImportAware, MinimizeAware, ResourcePostProcessor, ResourcePreProcessor, SupportAware, SupportedResourceTypeAware, ObjectDecorator<ResourcePreProcessor>

public class ExceptionHandlingProcessorDecorator
extends ProcessorDecorator

Responsible for handling exception thrown by decorated processor. If the processing fails, the behavior will vary based on the WroConfiguration.isIgnoreFailingProcessor() flag:

• When the flag is false (default) - the exception is wrapped in WroRuntimeException and thrown further
• When the flag is true - the exception is ignored and the writer will get the unchanged content from the reader.

Since:

1.4.7

Author:

Alex Objelean

Constructor Summary

ExceptionHandlingProcessorDecorator(Object processor)
Decorates a processor with failure handling ability.

Method Summary

protected boolean	isIgnoreFailingProcessor()
void	process(Resource resource, Reader reader, Writer writer) Process a content supplied by a reader and perform some sort of processing.

Methods inherited from class ro.isdc.wro.model.resource.processor.decorator.ProcessorDecorator

isEligible, isEnabled, toString

Methods inherited from class ro.isdc.wro.model.resource.processor.decorator.AbstractProcessorDecoratorSupport

getSupportedResourceType, getSupportedResourceTypeInternal, getSupportedResourceTypes, isImportAware, isMinimize, isMinimizeInternal, isSupported, process

Methods inherited from class ro.isdc.wro.util.AbstractDecorator

getDecoratedObject, getOriginalDecoratedObject, getOriginalDecoratedObject

Methods inherited from class java.lang.Object

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

Constructor Detail

ExceptionHandlingProcessorDecorator

public ExceptionHandlingProcessorDecorator(Object processor)

Decorates a processor with failure handling ability.

Parameters:

processor - to decorate.

Method Detail

process

public void process(Resource resource,
                    Reader reader,
                    Writer writer)
             throws IOException

Process a content supplied by a reader and perform some sort of processing. It is important to know that you should use reader for processing instead of trying to access the resource original content using Resource, because this way you can ignore the other preProcessors from the chain.
It is not require to explicitly handle exception. When the processing fails, the following can happen:

• the exception is wrapped in RuntimeException and the processing chain is interrupted (by default)
• content remains unchanged (if WroConfiguration.isIgnoreFailingProcessor() is true)

It is not required to close the reader and writers, because these will be closed for you.

Specified by:

process in interface ResourcePreProcessor

Overrides:

process in class ProcessorDecorator

Parameters:

resource - the original resource as it found in the model.

reader - Reader used to read processed resource content.

writer - Writer where used to write processed results.

Throws:

IOException - when an exception occurs. The future version will change the exception type to Exception, because any exception may occur during processing. The processing failure will be handled based on value of WroConfiguration.isIgnoreFailingProcessor() configuration flag.

isIgnoreFailingProcessor

protected boolean isIgnoreFailingProcessor()

Returns:

true if the failure should be ignored. By default uses the WroConfiguration to get the flag value.