[Task 72222] fixed a bug with the links after the implementation of the array dynamic workflowgroup links

dspace-server-webapp/src/main/java/org/dspace/app/rest/model/hateoas/HALResource.java

@@ -8,11 +8,13 @@
 package org.dspace.app.rest.model.hateoas;
 
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonUnwrapped;
+import org.apache.commons.lang3.StringUtils;
 import org.springframework.hateoas.EntityModel;
 import org.springframework.hateoas.Link;
 
@@ -44,4 +46,26 @@ public abstract class HALResource<T> extends EntityModel<T> {
     public void setPageHeader(EmbeddedPageHeader page) {
         this.pageHeader = page;
     }
+
+    @Override
+    public EntityModel<T> add(Link link) {
+        if (!hasLink(link.getRel())) {
+            return super.add(link);
+        } else {
+            String name = link.getName();
+            if (StringUtils.isNotBlank(name)) {
+                List<Link> list = this.getLinks(link.getRel());
+                boolean doesNameExist = false;
+                for (Link existingLink : list) {
+                    if (StringUtils.equalsIgnoreCase(existingLink.getName(), link.getName())) {
+                        doesNameExist = true;
+                    }
+                }
+                if (!doesNameExist) {
+                    super.add(link);
+                }
+            }
+        }
+        return this;
+    }
 }