ro.isdc.wro.extensions.processor.css
Class RhinoLessCssProcessor

java.lang.Object
  ro.isdc.wro.extensions.processor.css.RhinoLessCssProcessor

All Implemented Interfaces:

ResourcePostProcessor, ResourcePreProcessor

@SupportedResourceType(value=CSS)
public class RhinoLessCssProcessor
extends Object
implements ResourcePreProcessor, ResourcePostProcessor

A processor using lessCss engine: @see http://www.asual.com/lesscss/

The main css goodies are:

• Variables - Variables allow you to specify widely used values in a single place, and then re-use them throughout the style sheet, making global changes as easy as changing one line of code.
  

  
  
  
  
  Since:
    
  1.2.6
  Author:
    
  Alex Objelean
  
  
  
  
  
  
  
  Field Summary
  
  
  
  
  static String
  ALIAS
  
  
  
             
  
  
   
  
  
  
  Constructor Summary
  RhinoLessCssProcessor()
  
  
  
             
   
  
  
  
  Method Summary
  
  
  
  
  protected  LessCss
  newLessCss()
  
  
  
             
  
  
  
  protected  void
  onException(WroRuntimeException e)
  
  
  
            Invoked when a processing exception occurs.
  
  
  
   void
  process(Reader reader,
          Writer writer)
  
  
  
            Perform actual resource processing.
  
  
  
   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 java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
   
  
  
  
  
  
  Field Detail
  
  
  
  ALIAS
  public static final String ALIAS
  
  
  See Also:
  Constant Field Values
  
  
  
  
  
  Constructor Detail
  
  
  
  RhinoLessCssProcessor
  public RhinoLessCssProcessor()
  
  
  
  
  
  
  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
  
  
  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.
  
  
  
  
  
  onException
  protected void onException(WroRuntimeException e)
  
  Invoked when a processing exception occurs.
  
  
  
  
  
  
  
  
  
  
  
  newLessCss
  protected LessCss newLessCss()
  
  
  
  
  
  
  Returns:
  the LessCss engine implementation. Override it to provide a different version of the less.js
           library. Useful for upgrading the processor outside the wro4j release.
  
  
  
  
  
  process
  public void process(Reader reader,
                      Writer writer)
               throws IOException
  
  Perform actual resource processing. The content to be processed is read
   from source Reader and is written to destination Writer. It is the client
   responsibility to close both: Reader and writer.
  
  
  Specified by:
  process in interface ResourcePostProcessor
  
  
  Parameters:
  reader - source stream.
  writer - destination stream.
  Throws:
  IOException