Added optional to fix circular dependencies

Author: Thomas Draier

src/main/java/graphql/annotations/processor/retrievers/GraphQLTypeRetriever.java

@@ -22,10 +22,7 @@
 import graphql.annotations.processor.searchAlgorithms.SearchAlgorithm;
 import graphql.annotations.processor.typeBuilders.*;
 import graphql.schema.*;
-import org.osgi.service.component.annotations.Component;
-import org.osgi.service.component.annotations.Reference;
-import org.osgi.service.component.annotations.ReferencePolicy;
-import org.osgi.service.component.annotations.ReferencePolicyOption;
+import org.osgi.service.component.annotations.*;
 
 import static graphql.annotations.processor.util.InputPropertiesUtil.DEFAULT_INPUT_PREFIX;
 
@@ -107,7 +104,7 @@ public GraphQLFieldRetriever getGraphQLFieldRetriever() {
         return graphQLFieldRetriever;
     }
 
-    @Reference(policy= ReferencePolicy.DYNAMIC, policyOption= ReferencePolicyOption.GREEDY)
+    @Reference(cardinality = ReferenceCardinality.OPTIONAL, policy= ReferencePolicy.DYNAMIC, policyOption= ReferencePolicyOption.GREEDY)
     public void setGraphQLObjectInfoRetriever(GraphQLObjectInfoRetriever graphQLObjectInfoRetriever) {
         this.graphQLObjectInfoRetriever = graphQLObjectInfoRetriever;
     }
@@ -116,7 +113,7 @@ public void unsetGraphQLObjectInfoRetriever(GraphQLObjectInfoRetriever graphQLOb
         this.graphQLObjectInfoRetriever = null;
     }
 
-    @Reference(policy= ReferencePolicy.DYNAMIC, policyOption= ReferencePolicyOption.GREEDY)
+    @Reference(cardinality = ReferenceCardinality.OPTIONAL, policy= ReferencePolicy.DYNAMIC, policyOption= ReferencePolicyOption.GREEDY)
     public void setGraphQLInterfaceRetriever(GraphQLInterfaceRetriever graphQLInterfaceRetriever) {
         this.graphQLInterfaceRetriever = graphQLInterfaceRetriever;
     }
@@ -125,7 +122,7 @@ public void unsetGraphQLInterfaceRetriever(GraphQLInterfaceRetriever graphQLInte
         this.graphQLInterfaceRetriever = null;
     }
 
-    @Reference(policy=ReferencePolicy.DYNAMIC, policyOption= ReferencePolicyOption.GREEDY)
+    @Reference(cardinality = ReferenceCardinality.OPTIONAL, policy=ReferencePolicy.DYNAMIC, policyOption= ReferencePolicyOption.GREEDY)
     public void setGraphQLFieldRetriever(GraphQLFieldRetriever graphQLFieldRetriever) {
         this.graphQLFieldRetriever = graphQLFieldRetriever;
     }
@@ -134,7 +131,7 @@ public void unsetGraphQLFieldRetriever(GraphQLFieldRetriever graphQLFieldRetriev
         this.graphQLFieldRetriever = null;
     }
 
-    @Reference(target = "(type=field)", policy=ReferencePolicy.DYNAMIC, policyOption= ReferencePolicyOption.GREEDY)
+    @Reference(cardinality = ReferenceCardinality.OPTIONAL, target = "(type=field)", policy=ReferencePolicy.DYNAMIC, policyOption= ReferencePolicyOption.GREEDY)
     public void setFieldSearchAlgorithm(SearchAlgorithm fieldSearchAlgorithm) {
         this.fieldSearchAlgorithm = fieldSearchAlgorithm;
     }
@@ -143,7 +140,7 @@ public void unsetFieldSearchAlgorithm(SearchAlgorithm fieldSearchAlgorithm) {
         this.fieldSearchAlgorithm = null;
     }
 
-    @Reference(target = "(type=method)", policy=ReferencePolicy.DYNAMIC, policyOption= ReferencePolicyOption.GREEDY)
+    @Reference(cardinality = ReferenceCardinality.OPTIONAL, target = "(type=method)", policy=ReferencePolicy.DYNAMIC, policyOption= ReferencePolicyOption.GREEDY)
     public void setMethodSearchAlgorithm(SearchAlgorithm methodSearchAlgorithm) {
         this.methodSearchAlgorithm = methodSearchAlgorithm;
     }
@@ -152,7 +149,7 @@ public void unsetMethodSearchAlgorithm(SearchAlgorithm methodSearchAlgorithm) {
         this.methodSearchAlgorithm = null;
     }
 
-    @Reference(policy=ReferencePolicy.DYNAMIC, policyOption= ReferencePolicyOption.GREEDY)
+    @Reference(cardinality = ReferenceCardinality.OPTIONAL, policy=ReferencePolicy.DYNAMIC, policyOption= ReferencePolicyOption.GREEDY)
     public void setExtensionsHandler(GraphQLExtensionsHandler extensionsHandler) {
         this.extensionsHandler = extensionsHandler;
     }