Performance optimization to avoid loading Collaboration table per map.

wise-webapp/src/main/java/com/wisemapping/model/Collaborator.java

@@ -112,10 +112,18 @@ public class Collaborator implements Serializable {
 
 
     public boolean identityEquality(@Nullable Collaborator that) {
-        if (this == that) return true;
-        if (that == null) return false;
+        if (this == that) {
+            return true;
+        }
+
+        if (that == null) {
+            return false;
+        }
+
+        if (id != that.getId()) {
+            return false;
+        }
 
-        if (id != that.getId()) return false;
         return email != null ? email.equals(that.getEmail()) : that.getEmail() == null;
     }
 

wise-webapp/src/main/java/com/wisemapping/model/Mindmap.java

@@ -63,7 +63,7 @@ public class Mindmap implements Serializable {
     @Column(name = "public")
     private boolean isPublic;
 
-    @OneToMany(mappedBy = "mindMap", orphanRemoval = true, cascade = {CascadeType.ALL})
+    @OneToMany(mappedBy = "mindMap", orphanRemoval = true, cascade = {CascadeType.ALL}, fetch = FetchType.LAZY)
     private Set<Collaboration> collaborations = new HashSet<>();
 
     @ManyToMany(cascade = {CascadeType.PERSIST, CascadeType.REFRESH, CascadeType.MERGE})
@@ -177,15 +177,14 @@ public class Mindmap implements Serializable {
         return result;
     }
 
+    public boolean isCreator(@NotNull User user) {
+        return this.getCreator()!=null && this.getCreator().identityEquality(user);
+    }
+
     public boolean isPublic() {
         return isPublic;
     }
 
-    //@Todo: This is a hack to overcome some problem with JS EL. For some reason, ${mindmap.public} fails as not supported.
-    // More research is needed...
-    public boolean isAccessible() {
-        return isPublic();
-    }
 
     public void setPublic(boolean isPublic) {
         this.isPublic = isPublic;

wise-webapp/src/main/java/com/wisemapping/rest/model/RestMindmapInfo.java

@@ -132,8 +132,17 @@ public class RestMindmapInfo {
     }
 
     public String getRole() {
-        final Optional<Collaboration> collaboration = mindmap.findCollaboration(Utils.getUser());
-        return collaboration.map(value -> value.getRole().getLabel()).orElse(ROLE_NONE);
+        final User user = Utils.getUser();
+        String result;
+        if (mindmap.isCreator(user)) {
+            // Performance hack. In case that the person is the creator, assume that the role is owner.
+            // This is to avoid loading all the collaboration maps per map.
+            result = CollaborationRole.OWNER.getLabel();
+        } else {
+            final Optional<Collaboration> collaboration = mindmap.findCollaboration(user);
+            result = collaboration.map(value -> value.getRole().getLabel()).orElse(ROLE_NONE);
+        }
+        return result;
     }
 
     public void setRole(String value) {