add module annotation (#59)

Author: h908714124

simple-component/src/main/java/io/jbock/simple/Component.java

@@ -11,13 +11,13 @@
  * implementation is to be generated. The generated class will
  * have the name of the type annotated, appended with {@code _Impl}. For
  * example, {@code @Component interface MyComponent {...}} will produce an implementation named
- * {@code MyComponent_Impl}.</p>
+ * {@code MyComponent_Impl}.
  *
  * <h2>Component methods</h2>
  *
  * <p>Every type annotated with {@code @Component} must contain at least one abstract component
  * method. Component methods may have any name, but must have no parameters and return a bound type.
- * A bound type is one of the following:</p>
+ * A bound type is one of the following:
  *
  * <ul>
  *     <li>an {@link Inject injected} type
@@ -30,6 +30,12 @@
 @Retention(SOURCE)
 public @interface Component {
 
+    /**
+     * A list of classes annotated with {@link Module} whose bindings are used to generate the
+     * component implementation.
+     */
+    Class<?>[] modules() default {};
+
     /**
      * A factory for a component. Components <em>may</em> have a single nested {@code interface}
      * annotated with {@code @Component.Factory}.

simple-component/src/main/java/io/jbock/simple/Module.java

@@ -0,0 +1,12 @@
+package io.jbock.simple;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/** Annotates a class that contributes to the object graph. */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.TYPE)
+public @interface Module {
+}