Package org.faceless.publisher.ext

Class LessStylesheetExtension

java.lang.Object
org.faceless.publisher.ext.LessStylesheetExtension
All Implemented Interfaces:
ReportFactoryExtension, ResourceLoader
public class LessStylesheetExtension extends Object implements ReportFactoryExtension, ResourceLoader

The LessStylesheetExtension adds the ability to natively use the "Less" stylesheet format defined at https://lesscss.org. It adds a ResourceLoader for objects with the media type text/x-stylesheet-less, which is a synthetic media-type used in BFO Publisher when an HTML <link> element is encountered with rel="stylesheet/less"

It requires the com.inet.lib.less package in the classpath from https://github.com/i-net-software/jlessc

  • Field Details

    • MEDIATYPE

      public static final MediaType MEDIATYPE
      The synthetic MediaType "text/x-stylesheet-less" which is used to identify resources loaded by this ResourceLoader

  • Constructor Details

    • LessStylesheetExtension

      public LessStylesheetExtension()

  • Method Details

    • unregister

      public void unregister(ReportFactory factory)
      Description copied from interface: ReportFactoryExtension
      Notify this object it has been removed from a ReportFactory. Will be called when this object is removed from the list returned by ReportFactory.getReportFactoryExtensions(). The default implementation is a no-op.
      Specified by:
      unregister in interface ReportFactoryExtension

    • register

      public void register(ReportFactory factory)
      Description copied from interface: ReportFactoryExtension
      Notify this object it has beem added to a ReportFactory. Will be called when this object is added to the list returned by ReportFactory.getReportFactoryExtensions(). The default implementation is a no-op.
      Specified by:
      register in interface ReportFactoryExtension

    • supports

      public boolean supports(ResourceDescriptor descriptor)
      Description copied from interface: ResourceLoader
      Return true if this ResourceLoader could load a descriptor of the specified type. The resourceClass, outputClass and mediaType of the descriptor should be checked as appropriate. The MediaType in particular will not be a wildcard for normal use; it may be a wildcard if we're being called from ResourceManager.getResourceLoader(org.faceless.publisher.type.MediaType, java.lang.Class<?>).
      Specified by:
      supports in interface ResourceLoader

    • load

      public ResourceFlavor load(ResourceDescriptor descriptor, Resource resource, URL2Connection con) throws IOException
      Description copied from interface: ResourceLoader
      Attempt to load a Resource from the specified URL2Connection. If the ResourceLoader applies (it should test the resource mediatype and class) then it should load the resource from the URL. If the URI has a fragment and the loaded resource to ALL fragments, it should change the URI to have no fragment. Likewise if any aspect of the MediaType does not apply (i.e. the encoding) then it should remove it, so the Resource describes the widest possible URI and MediaType that would match this object. Finally, on success this method should set the Object on the resource, or throw an exception on failure. The supplied "con" will have an InputStream that is mark-capable already. If the stream is a gzip or brotli compresed stream, decompression will already be applied. The mediatype wil be set on "d". Returning null from this object is considered an error condition - if that happens we shouldn't have got here, and the only reason we did was because "supports" for the same descriptor returned true.
      Specified by:
      load in interface ResourceLoader
      Parameters:
      descriptor - the descriptor of what type of flavor we want.
      resource - the Resource we're populating
      con - the URLConnection to load the resource from
      Returns:
      the new Flavor, or null if it doesn't apply.
      Throws:
      IOException