find and bind extension points automatically

scm-core/src/main/java/sonia/scm/io/FileSystem.java

@@ -46,7 +46,7 @@ import java.io.IOException;
  *
  * @author Sebastian Sdorra
  */
-@ExtensionPoint
+@ExtensionPoint(multi=false)
 public interface FileSystem
 {
 

scm-core/src/main/java/sonia/scm/plugin/ExtensionPoint.java

@@ -47,5 +47,8 @@ import java.lang.annotation.Target;
  */
 @Documented
 @Target({ ElementType.TYPE })
-@Retention(RetentionPolicy.CLASS)
-public @interface ExtensionPoint {}
+@Retention(RetentionPolicy.RUNTIME)
+public @interface ExtensionPoint
+{
+  boolean multi() default true;
+}

scm-core/src/main/java/sonia/scm/plugin/ext/AnnotatedClass.java

@@ -30,8 +30,13 @@
  */
 
 
+
 package sonia.scm.plugin.ext;
 
+//~--- non-JDK imports --------------------------------------------------------
+
+import com.google.common.base.Objects;
+
 //~--- JDK imports ------------------------------------------------------------
 
 import java.lang.annotation.Annotation;
@@ -60,6 +65,64 @@ public class AnnotatedClass<T extends Annotation>
     this.annotatedClass = annotatedClass;
   }
 
+  //~--- methods --------------------------------------------------------------
+
+  /**
+   * {@inheritDoc}
+   *
+   *
+   * @param obj
+   *
+   * @return
+   */
+  @Override
+  public boolean equals(Object obj)
+  {
+    if (obj == null)
+    {
+      return false;
+    }
+
+    if (getClass() != obj.getClass())
+    {
+      return false;
+    }
+
+    final AnnotatedClass<T> other = (AnnotatedClass<T>) obj;
+
+    return Objects.equal(annotation, other.annotation)
+      && Objects.equal(annotatedClass, other.annotatedClass);
+  }
+
+  /**
+   * {@inheritDoc}
+   *
+   *
+   * @return
+   */
+  @Override
+  public int hashCode()
+  {
+    return Objects.hashCode(annotation, annotatedClass);
+  }
+
+  /**
+   * {@inheritDoc}
+   *
+   *
+   * @return
+   */
+  @Override
+  public String toString()
+  {
+    //J-
+    return Objects.toStringHelper(this)
+                  .add("annotation", annotation)
+                  .add("annotatedClass", annotatedClass)
+                  .toString();
+    //J+
+  }
+
   //~--- get methods ----------------------------------------------------------
 
   /**