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

java.lang.Object
  extended by ro.isdc.wro.extensions.processor.css.SassCssProcessor
All Implemented Interfaces:
ResourcePostProcessor, ResourcePreProcessor

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

A processor using sass engine:

Author:
Alex Objelean

Field Summary
static String ALIAS
           
static String ALIAS_RUBY
           
 
Constructor Summary
SassCssProcessor()
          default constructor that sets the engine used to RHINO for backwards compatibility.
 
Method Summary
protected  SassCss newEngine()
          Method for processing with Rhino based engine
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

ALIAS_RUBY

public static final String ALIAS_RUBY
See Also:
Constant Field Values
Constructor Detail

SassCssProcessor

public SassCssProcessor()
default constructor that sets the engine used to RHINO for backwards compatibility.

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:
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. By default the exception is thrown further.


newEngine

protected SassCss newEngine()
Method for processing with Rhino based engine

Parameters:
content -
Returns:

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


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