org.argeo.api.cms/src/org/argeo/api/cms/ux/MvcProvider.java

   1 package org.argeo.api.cms.ux;
   2
   3 import java.util.function.BiFunction;
   4
   5 /**
   6  * Stateless UI part creator. Takes a parent view (V) and a model context (M) in
   7  * order to create a view part (W) which can then be further configured. Such
   8  * object can be used as services and reference other part of the model which
   9  * are relevant for all created UI part.
  10  */
  11 @FunctionalInterface
  12 @Deprecated
  13 public interface MvcProvider<V, M, W> extends BiFunction<V, M, W> {
  14         W createUiPart(V parent, M context);
  15
  16         /**
  17          * Whether this parent view is supported.
  18          *
  19          * @return true by default.
  20          */
  21         default boolean isViewSupported(V parent) {
  22                 return true;
  23         }
  24
  25         /**
  26          * Whether this context is supported.
  27          *
  28          * @return true by default.
  29          */
  30         default boolean isModelSupported(M context) {
  31                 return true;
  32         }
  33
  34         default W apply(V parent, M context) {
  35                 if (!isViewSupported(parent))
  36                         throw new IllegalArgumentException("Parent view " + parent + "is not supported.");
  37                 if (!isModelSupported(context))
  38                         throw new IllegalArgumentException("Model context " + context + "is not supported.");
  39                 return createUiPart(parent, context);
  40         }
  41
  42         default W createUiPart(V parent) {
  43                 return createUiPart(parent, null);
  44         }
  45 }