code: @Override
  	public GlobalProcessor<T> buildProcessorChain(String processorKeys) {
  
  		if (null == processorKeys)
  			return null;
  		else if (JawrConstant.EMPTY_GLOBAL_PREPROCESSOR_ID.equals(processorKeys))
  			return new EmptyGlobalProcessor<>();
  
  		StringTokenizer tk = new StringTokenizer(processorKeys, ",");
  
  		AbstractChainedGlobalProcessor<T> chain = null;
  		while (tk.hasMoreTokens())
  			chain = addOrCreateChain(chain, tk.nextToken());
  
  		return chain;
  	}
docs: /*
  (non-Javadoc)
  
  @see
  net.jawr.web.resource.bundle.global.processor.GlobalProcessorChainFactory
  #buildProcessorChain(java.lang.String)