Fix for Kryo related issue crossing OSGi bundle boundaries.

Change-Id: I121dfe360de14a5b4760e5d2fd8cb2db93e0be63
diff --git a/core/store/src/main/java/org/onlab/onos/store/device/impl/ProviderIdSerializer.java b/core/store/src/main/java/org/onlab/onos/store/device/impl/ProviderIdSerializer.java
new file mode 100644
index 0000000..82b7a70
--- /dev/null
+++ b/core/store/src/main/java/org/onlab/onos/store/device/impl/ProviderIdSerializer.java
@@ -0,0 +1,37 @@
+package org.onlab.onos.store.device.impl;
+
+import org.onlab.onos.net.provider.ProviderId;
+
+import com.esotericsoftware.kryo.Kryo;
+import com.esotericsoftware.kryo.Serializer;
+import com.esotericsoftware.kryo.io.Input;
+import com.esotericsoftware.kryo.io.Output;
+
+//TODO move to util, etc.
+/**
+ * Serializer for {@link ProviderId}.
+ */
+public class ProviderIdSerializer extends Serializer<ProviderId> {
+
+    /**
+     * Default constructor.
+     */
+    public ProviderIdSerializer() {
+        // non-null, immutable
+        super(false, true);
+    }
+
+    @Override
+    public void write(Kryo kryo, Output output, ProviderId object) {
+        output.writeString(object.scheme());
+        output.writeString(object.id());
+    }
+
+    @Override
+    public ProviderId read(Kryo kryo, Input input, Class<ProviderId> type) {
+        String scheme = input.readString();
+        String id = input.readString();
+        return new ProviderId(scheme, id);
+    }
+
+}