Added event handling machinery to intercept render events. It's now possible to write and event handler to influence the resource objects that are being sent to the client. There is an abstract helper class and there is support for annotated POJOs.

spring-data-rest-webmvc/src/main/java/org/springframework/data/rest/webmvc/RepositoryRestController.java

@@ -65,6 +65,8 @@ import org.springframework.data.rest.repository.context.AfterSaveEvent;
 import org.springframework.data.rest.repository.context.BeforeDeleteEvent;
 import org.springframework.data.rest.repository.context.BeforeLinkDeleteEvent;
 import org.springframework.data.rest.repository.context.BeforeLinkSaveEvent;
+import org.springframework.data.rest.repository.context.BeforeRenderResourceEvent;
+import org.springframework.data.rest.repository.context.BeforeRenderResourcesEvent;
 import org.springframework.data.rest.repository.context.BeforeSaveEvent;
 import org.springframework.data.rest.repository.context.RepositoryEvent;
 import org.springframework.data.rest.repository.invoke.CrudMethod;
@@ -326,6 +328,8 @@ public class RepositoryRestController
       }
     }
 
+    publishEvent(new BeforeRenderResourcesEvent(request, null, resources));
+
     return negotiateResponse(request, HttpStatus.OK, new HttpHeaders(), resources);
   }
 
@@ -438,6 +442,8 @@ public class RepositoryRestController
                                        buildUri(baseUri, repository, "search")));
     }
 
+    publishEvent(new BeforeRenderResourcesEvent(request, repoMeta, resources));
+
     return negotiateResponse(request, HttpStatus.OK, new HttpHeaders(), resources);
   }
 
@@ -490,6 +496,8 @@ public class RepositoryRestController
       }
     }
 
+    publishEvent(new BeforeRenderResourcesEvent(request, repoMeta, resources));
+
     return negotiateResponse(request, HttpStatus.OK, new HttpHeaders(), resources);
   }
 
@@ -664,6 +672,8 @@ public class RepositoryRestController
       }
     }
 
+    publishEvent(new BeforeRenderResourcesEvent(request, repoMeta, resources));
+
     return negotiateResponse(request, HttpStatus.OK, new HttpHeaders(), resources);
   }
 
@@ -726,6 +736,8 @@ public class RepositoryRestController
       body = resource;
     }
 
+    publishEvent(new BeforeRenderResourceEvent(request, repoMeta, body));
+
     return negotiateResponse(request, HttpStatus.CREATED, headers, body);
   }
 
@@ -787,6 +799,8 @@ public class RepositoryRestController
     URI selfUri = buildUri(baseUri, repository, id);
     res.addLink(new SimpleLink(SELF, selfUri));
 
+    publishEvent(new BeforeRenderResourceEvent(request, repoMeta, res));
+
     return negotiateResponse(request, HttpStatus.OK, headers, res);
   }
 
@@ -871,6 +885,8 @@ public class RepositoryRestController
                                        baseUri);
       res.addLink(new SimpleLink(SELF, selfUri));
 
+      publishEvent(new BeforeRenderResourceEvent(request, repoMeta, body));
+
       body = res;
     }
 
@@ -1025,6 +1041,8 @@ public class RepositoryRestController
       res.addLink(new SimpleLink(rel, path));
     }
 
+    publishEvent(new BeforeRenderResourceEvent(request, propRepoMeta, res));
+
     return negotiateResponse(request, HttpStatus.OK, new HttpHeaders(), res);
   }
 
@@ -1274,6 +1292,8 @@ public class RepositoryRestController
     URI selfUri = buildUri(baseUri, linkedRepoMeta.name(), linkedId);
     res.addLink(new SimpleLink(SELF, selfUri));
 
+    publishEvent(new BeforeRenderResourcesEvent(request, repoMeta, res));
+
     HttpHeaders headers = new HttpHeaders();
     headers.add("Content-Location", selfUri.toString());
 
@@ -1629,37 +1649,6 @@ public class RepositoryRestController
     return resource;
   }
 
-  /*
-  @SuppressWarnings({"unchecked"})
-  private Map<String, Object> extractPropertiesLinkAware(String repoRel,
-                                                         Object entity,
-                                                         EntityMetadata<AttributeMetadata> entityMetadata,
-                                                         URI baseUri) {
-    final Map<String, Object> entityDto = new HashMap<String, Object>();
-
-    for(Map.Entry<String, AttributeMetadata> attrMeta : entityMetadata.embeddedAttributes().entrySet()) {
-      String name = attrMeta.getKey();
-      Object val = attrMeta.getValue().get(entity);
-      if(null != val) {
-        entityDto.put(name, val);
-      }
-    }
-
-    for(String attrName : entityMetadata.linkedAttributes().keySet()) {
-      URI uri = buildUri(baseUri, attrName);
-      Link l = new SimpleLink(repoRel + "." + entity.getClass().getSimpleName() + "." + attrName, uri);
-      List<Link> links = (List<Link>)entityDto.get(LINKS);
-      if(null == links) {
-        links = new ArrayList<Link>();
-        entityDto.put(LINKS, links);
-      }
-      links.add(l);
-    }
-
-    return entityDto;
-  }
-  */
-
   private boolean shouldReturnLinks(String acceptHeader) {
     if(null != acceptHeader) {
       List<MediaType> accept = MediaType.parseMediaTypes(acceptHeader);

spring-data-rest-webmvc/src/test/groovy/org/springframework/data/rest/webmvc/spec/EventsSpec.groovy

@@ -44,4 +44,8 @@ class EventsSpec extends BaseSpec {
 
   }
 
+  def "captures resource rendering events"() {
+
+  }
+
 }