Add getters with Optional to stores

scm-core/src/main/java/sonia/scm/store/ConfigurationStore.java

@@ -33,6 +33,10 @@
 
 package sonia.scm.store;
 
+import java.util.Optional;
+
+import static java.util.Optional.ofNullable;
+
 /**
  * ConfigurationStore for configuration objects. <strong>Note:</strong> the default
  * implementation use JAXB to marshall the configuration objects.
@@ -50,7 +54,17 @@ public interface ConfigurationStore<T>
    *
    * @return configuration object from store
    */
-  public T get();
+  T get();
+
+  /**
+   * Returns the configuration object from store.
+   *
+   *
+   * @return configuration object from store
+   */
+  default Optional<T> getOptional() {
+    return ofNullable(get());
+  }
 
   //~--- set methods ----------------------------------------------------------
 
@@ -60,5 +74,5 @@ public interface ConfigurationStore<T>
    *
    * @param obejct configuration object to store
    */
-  public void set(T obejct);
+  void set(T object);
 }

scm-core/src/main/java/sonia/scm/store/MultiEntryStore.java

@@ -32,6 +32,10 @@
 
 package sonia.scm.store;
 
+import java.util.Optional;
+
+import static java.util.Optional.ofNullable;
+
 /**
  * Base class for {@link BlobStore} and {@link DataStore}.
  *
@@ -67,4 +71,16 @@ public interface MultiEntryStore<T> {
    * @return item with the given id
    */
   public T get(String id);
+
+  /**
+   * Returns the item with the given id from the store.
+   *
+   *
+   * @param id id of the item to return
+   *
+   * @return item with the given id
+   */
+  default Optional<T> getOptional(String id) {
+    return ofNullable(get(id));
+  }
 }