9507 show linked collections

src/main/java/edu/harvard/iq/dataverse/DatasetPage.java

@@ -3391,7 +3391,7 @@ public void saveLinkingDataverses(ActionEvent evt) {
             FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_INFO, BundleUtil.getStringFromBundle("dataset.notlinked"), linkingDataverseErrorMessage);
             FacesContext.getCurrentInstance().addMessage(null, message);
         }
-
+        alreadyLinkedDataverses = null; //force update to list of linked dataverses
     }
 
     private String linkingDataverseErrorMessage = "";
@@ -3427,7 +3427,23 @@ private Boolean saveLink(Dataverse dataverse){
         }
         return retVal;
     }
-
+
+    private String alreadyLinkedDataverses = null;
+
+    public String getAlreadyLinkedDataverses(){
+        if (alreadyLinkedDataverses != null) {           
+            return alreadyLinkedDataverses;
+        }
+        List<Dataverse> dataverseList = dataverseService.findDataversesThatLinkToThisDatasetId(dataset.getId());
+        for (Dataverse dv: dataverseList){
+            if (alreadyLinkedDataverses == null){
+                alreadyLinkedDataverses = dv.getCurrentName();
+            } else {
+                alreadyLinkedDataverses = alreadyLinkedDataverses + ", " + dv.getCurrentName();
+            }
+        }
+        return alreadyLinkedDataverses;
+    }
 
     public List<Dataverse> completeLinkingDataverse(String query) {
         dataset = datasetService.find(dataset.getId());

src/main/java/propertyFiles/Bundle.properties

@@ -2498,6 +2498,7 @@ dataset.registered=DatasetRegistered
 dataset.registered.msg=Your dataset is now registered.
 dataset.notlinked=DatasetNotLinked
 dataset.notlinked.msg=There was a problem linking this dataset to yours:
+dataset.linking.popop.already.linked.note=Note: This dataset is already linked to the following dataverse(s):  
 datasetversion.archive.success=Archival copy of Version successfully submitted
 datasetversion.archive.failure=Error in submitting an archival copy 
 datasetversion.update.failure=Dataset Version Update failed. Changes are still in the DRAFT version.

src/main/webapp/dataset.xhtml

@@ -1622,6 +1622,12 @@
                                 </div>
                             </div>
                         </div>
+                        <div>
+                            <p:fragment rendered="#{!empty DatasetPage.alreadyLinkedDataverses}"> 
+                            <h:outputLabel  value="#{bundle['dataset.linking.popop.already.linked.note']}"/>&#160;
+                            <h:outputText rendered="#{!empty DatasetPage.alreadyLinkedDataverses }" value="#{DatasetPage.alreadyLinkedDataverses}"/>
+                            </p:fragment>
+                        </div>
                         <div class="button-block">
                             <p:commandButton id="saveLinkButton" styleClass="btn btn-default"    
                                              update="linkNameContent @([id$=Messages])"