1 files changed, 29 insertions, 2 deletions
diff --git a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/stork2/attributeproviders/AttributeProvider.java b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/stork2/attributeproviders/AttributeProvider.java
index a8454b37c..4b50e2593 100644
--- a/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/stork2/attributeproviders/AttributeProvider.java
+++ b/id/server/idserverlib/src/main/java/at/gv/egovernment/moa/id/protocols/stork2/attributeproviders/AttributeProvider.java
@@ -40,7 +40,7 @@ import eu.stork.peps.auth.commons.PersonalAttribute;
  * An {@link AttributeProvider} can fetch a set of stork attributes. It might complete the query within one method call,
  * but might also need to redirect to another webservice to accomplish its task.
  */
-public abstract class AttributeProvider {
+public abstract class AttributeProvider implements Comparable<AttributeProvider>{
 
 	protected String attributes;
 	
@@ -107,5 +107,32 @@ public abstract class AttributeProvider {
         return supportedAttributeNames;
     }
 
-
+    
+    /**
+     * Returns the sequence priority of this attribute provider.
+     * Providers with small numbers are requested first. 
+     * 
+     * @return a sequence priority of this provider
+     */
+    public abstract int getPriority();
+ 
+    /**
+     * Compare the sequence priority of two attribute providers 
+     * @param o attribute provider
+     * @return 0 if priority is equal
+     * @return -1 if priority if this is higher then from o
+     * @return +1 if priority if o is higher then from this
+     */
+	@Override
+	public int compareTo(AttributeProvider o) {
+    	if (this.getPriority() == o.getPriority())
+    		return 0;
+    	
+    	if (this.getPriority() < o.getPriority())
+    		return -1;
+    	
+    	else
+    		return +1;
+	}
+    
 }