code: @Override
  	protected boolean isCacheValid() {
  
  		boolean isValid = false;
  		String servletMapping = config.getServletMapping();
  
  		String binaryServletMapping = getBinaryServletMapping();
  		if (super.isCacheValid()
  				&& StringUtils.equals(servletMapping, cacheProperties.getProperty(JAWR_SERVLET_MAPPING))
  				&& StringUtils.equals(binaryServletMapping, cacheProperties.getProperty(JAWR_BINARY_SERVLET_MAPPING))
  				&& StringUtils.equals(Boolean.toString(config.isCssClasspathImageHandledByClasspathCss()),
  						cacheProperties.getProperty(JawrConfig.JAWR_CSS_CLASSPATH_HANDLE_IMAGE))
  				&& StringUtils.equals(cacheProperties.getProperty(JawrConfig.JAWR_BINARY_HASH_ALGORITHM),
  						config.getBinaryHashAlgorithm())) {
  			isValid = true;
  		}
  
  		return isValid;
  	}
docs: /*
  (non-Javadoc)
  
  @see net.jawr.web.resource.bundle.generator.AbstractCachedGenerator#
  isCacheValid()