refactoring: use null URL in UnknownConnector

3 files changed, 8 insertions, 5 deletions

diff --git a/main/src/cgeo/geocaching/connector/AbstractConnector.java b/main/src/cgeo/geocaching/connector/AbstractConnector.java
index 4984273..7e21366 100644
--- a/main/src/cgeo/geocaching/connector/AbstractConnector.java
+++ b/main/src/cgeo/geocaching/connector/AbstractConnector.java
@@ -19,6 +19,7 @@ import cgeo.geocaching.location.Geopoint;
 
 import org.apache.commons.lang3.StringUtils;
 import org.eclipse.jdt.annotation.NonNull;
+import org.eclipse.jdt.annotation.Nullable;
 
 import rx.functions.Action1;
 
@@ -144,7 +145,7 @@ public abstract class AbstractConnector implements IConnector {
     abstract protected String getCacheUrlPrefix();
 
     @Override
-    @NonNull
+    @Nullable
     public String getLongCacheUrl(final @NonNull Geocache cache) {
         return getCacheUrl(cache);
     }
diff --git a/main/src/cgeo/geocaching/connector/IConnector.java b/main/src/cgeo/geocaching/connector/IConnector.java
index 0863723..ce98605 100644
--- a/main/src/cgeo/geocaching/connector/IConnector.java
+++ b/main/src/cgeo/geocaching/connector/IConnector.java
@@ -6,6 +6,7 @@ import cgeo.geocaching.enumerations.LogType;
 import cgeo.geocaching.location.Geopoint;
 
 import org.eclipse.jdt.annotation.NonNull;
+import org.eclipse.jdt.annotation.Nullable;
 
 import java.util.Collection;
 import java.util.List;
@@ -34,7 +35,7 @@ public interface IConnector {
      * @param cache
      * @return
      */
-    @NonNull
+    @Nullable
     public String getCacheUrl(final @NonNull Geocache cache);
 
     /**
@@ -43,7 +44,7 @@ public interface IConnector {
      * @param cache
      * @return
      */
-    @NonNull
+    @Nullable
     public String getLongCacheUrl(final @NonNull Geocache cache);
 
     /**
diff --git a/main/src/cgeo/geocaching/connector/UnknownConnector.java b/main/src/cgeo/geocaching/connector/UnknownConnector.java
index fcf1152..1ef1aff 100644
--- a/main/src/cgeo/geocaching/connector/UnknownConnector.java
+++ b/main/src/cgeo/geocaching/connector/UnknownConnector.java
@@ -4,6 +4,7 @@ import cgeo.geocaching.Geocache;
 
 import org.apache.commons.lang3.StringUtils;
 import org.eclipse.jdt.annotation.NonNull;
+import org.eclipse.jdt.annotation.Nullable;
 
 class UnknownConnector extends AbstractConnector {
 
@@ -14,9 +15,9 @@ class UnknownConnector extends AbstractConnector {
     }
 
     @Override
-    @NonNull
+    @Nullable
     public String getCacheUrl(@NonNull final Geocache cache) {
-        return StringUtils.EMPTY;
+        return null;
     }
 
     @Override