Enable strict classpath scanning optionally

This closes #51

Author: kwin

org.eclipse.sisu.plexus/src/main/java/org/codehaus/plexus/ContainerConfiguration.java

@@ -62,4 +62,9 @@ public interface ContainerConfiguration
     ContainerConfiguration setJSR250Lifecycle( boolean on );
 
     boolean getJSR250Lifecycle();
+
+    ContainerConfiguration setStrictClassPathScanning( boolean strictScanning );
+
+    boolean getStrictClassPathScanning();
+
 }

org.eclipse.sisu.plexus/src/main/java/org/codehaus/plexus/DefaultContainerConfiguration.java

@@ -46,6 +46,8 @@ public final class DefaultContainerConfiguration
 
     private boolean jsr250Lifecycle;
 
+    private boolean strictClassPathScanning;
+
     // ----------------------------------------------------------------------
     // Public methods
     // ----------------------------------------------------------------------
@@ -168,4 +170,17 @@ public boolean getJSR250Lifecycle()
     {
         return jsr250Lifecycle;
     }
+
+    @Override
+    public ContainerConfiguration setStrictClassPathScanning( boolean strictScanning )
+    {
+        this.strictClassPathScanning = strictScanning;
+        return this;
+    }
+
+    @Override
+    public boolean getStrictClassPathScanning()
+    {
+        return strictClassPathScanning;
+    }
 }

org.eclipse.sisu.plexus/src/main/java/org/codehaus/plexus/DefaultPlexusContainer.java

@@ -200,7 +200,8 @@ public DefaultPlexusContainer( final ContainerConfiguration configuration, final
         final ClassSpace space = new URLClassSpace( containerRealm );
         beanModules.add( new PlexusXmlBeanModule( space, variables, plexusXml ) );
         final BeanScanning global = BeanScanning.INDEX == scanning ? BeanScanning.GLOBAL_INDEX : scanning;
-        beanModules.add( new PlexusAnnotatedBeanModule( space, variables, global ) );
+        beanModules.add( new PlexusAnnotatedBeanModule( space, variables, global,
+                                                        configuration.getStrictClassPathScanning() ) );
 
         try
         {

org.eclipse.sisu.plexus/src/main/java/org/eclipse/sisu/plexus/PlexusAnnotatedBeanModule.java

@@ -68,12 +68,27 @@ public PlexusAnnotatedBeanModule( final ClassSpace space, final Map<?, ?> variab
      * @param space The local class space
      * @param variables The filter variables
      * @param scanning The scanning options
+     * @deprecated Use {@link #PlexusAnnotatedBeanModule(ClassSpace, Map, BeanScanning, boolean)} instead.
      */
+    @Deprecated
     public PlexusAnnotatedBeanModule( final ClassSpace space, final Map<?, ?> variables, final BeanScanning scanning )
+    {
+        this( space, variables, scanning, false );
+    }
+
+    /**
+     * Creates a bean source that scans the given class space for Plexus annotations using the given scanner.
+     * 
+     * @param space The local class space
+     * @param variables The filter variables
+     * @param scanning The scanning options
+     */
+    public PlexusAnnotatedBeanModule( final ClassSpace space, final Map<?, ?> variables, final BeanScanning scanning,
+                                      boolean strictScanning )
     {
         if ( null != space && scanning != BeanScanning.OFF )
         {
-            spaceModule = new SpaceModule( space, scanning ).with( PLEXUS_STRATEGY );
+            spaceModule = new SpaceModule( space, scanning, strictScanning ).with( PLEXUS_STRATEGY );
         }
         else
         {