Improved component naming

* Setting a component information record's name to null will lead to an
anonymous component, while setting it to an empty string will lead to an
component whose name is that of its class.
* New Anonymous annotation to indicate that a component is meant to be
anonymous (conflicts with ParametricComponent or valued Component
annotations).

src/main/java/info/ebenoit/ebul/cmp/Anonymous.java

@@ -0,0 +1,21 @@
+package info.ebenoit.ebul.cmp;
+
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+
+
+/**
+ * Annotation indicating that a component will not have a name.
+ *
+ * @author <a href="mailto:ebenoit@ebenoit.info">E. Benoît</a>
+ */
+@Retention( RetentionPolicy.RUNTIME )
+@Target( ElementType.TYPE )
+public @interface Anonymous
+{
+	// EMPTY
+}

src/main/java/info/ebenoit/ebul/cmp/ComponentState.java

@@ -84,7 +84,7 @@ public final class ComponentState
 			name = ( (ParametricComponent) component ).getComponentName( );
 		} else {
 			name = ci.getName( );
-			if ( name == null ) {
+			if ( "".equals( name ) ) {
 				name = component.getClass( ).getSimpleName( );
 			}
 		}

src/main/java/info/ebenoit/ebul/cmp/NewComponentInfo.java

@@ -75,15 +75,22 @@ public final class NewComponentInfo< T >
 
 		// Sets the new component's name
 		final Component aComp = klass.getAnnotation( Component.class );
-		if ( aComp != null && !"".equals( aComp.value( ) ) ) {
+		final boolean isAnon = klass.isAnnotationPresent( Anonymous.class );
+		if ( isAnon ) {
 			if ( ParametricComponent.class.isAssignableFrom( klass ) ) {
+				throw new ComponentDefinitionException( "parametric component can't be anonymous" );
+			}
+			if ( aComp != null && !"".equals( aComp.value( ) ) ) {
+				throw new ComponentDefinitionException( "named component can't be anonymous" );
+			}
+			info.setName( null );
+		} else if ( aComp != null ) {
+			if ( !"".equals( aComp.value( ) ) && ParametricComponent.class.isAssignableFrom( klass ) ) {
 				throw new ComponentDefinitionException( "parametric component can't be named" );
 			}
 			info.setName( aComp.value( ) );
-		} else if ( !ParametricComponent.class.isAssignableFrom( klass ) ) {
-			info.setName( klass.getSimpleName( ) );
 		} else {
-			info.setName( null );
+			info.setName( "" );
 		}
 
 		// Autostart flag
@@ -365,7 +372,8 @@ public final class NewComponentInfo< T >
 	 * Sets the new component's name
 	 *
 	 * @param name
-	 *            the new component's name
+	 *            the new component's name. May be <code>null</code> for an anonymous component or {@code ""} for a
+	 *            component whose class name will serve as its name.
 	 * @return the current object
 	 */
 	public NewComponentInfo< T > setName( final String name )
@@ -376,7 +384,8 @@ public final class NewComponentInfo< T >
 
 
 	/**
-	 * @return the name of the new component
+	 * @return the name of the new component. May be <code>null</code> for an anonymous component or {@code ""} for a
+	 *         component whose class name will serve as its name.
 	 */
 	public String getName( )
 	{