SP-168 BIS-90 : tryGetAsLinkDataSet() method added to ExternalData

SVN: 25855

openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/basic/dto/ExternalData.java

@@ -124,6 +124,11 @@ public abstract class ExternalData extends CodeWithRegistrationAndModificationDa
         return null; // overriden in subclasses
     }
 
+    public LinkDataSet tryGetAsLinkDataSet()
+    {
+        return null; // overriden in a subclasses
+    }
+
     public String getPermlink()
     {
         return permlink;

openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/basic/dto/LinkDataSet.java

@@ -50,4 +50,10 @@ public class LinkDataSet extends ExternalData
     {
         this.externalCode = externalCode;
     }
+
+    @Override
+    public LinkDataSet tryGetAsLinkDataSet()
+    {
+        return this;
+    }
 }