Make ClassWorld implement Closeable

This closes #71

Author: kwin

src/main/java/org/codehaus/plexus/classworlds/ClassWorld.java

@@ -1,5 +1,7 @@
 package org.codehaus.plexus.classworlds;
 
+import java.io.Closeable;
+
 /*
  * Copyright 2001-2006 Codehaus Foundation.
  *
@@ -33,7 +35,7 @@
  *
  * @author <a href="mailto:[email protected]">bob mcwhirter</a>
  */
-public class ClassWorld
+public class ClassWorld implements Closeable
 {
     private Map<String, ClassRealm> realms;
 
@@ -86,24 +88,43 @@ public synchronized ClassRealm newRealm( String id, ClassLoader classLoader )
         return realm;
     }
 
-    public synchronized void disposeRealm( String id )
-        throws NoSuchRealmException
+    /**
+     * Closes all contained class realms.
+     */
+    @Override
+    public synchronized void close()
+        throws IOException
+    {
+        realms.values().stream().forEach( this::disposeRealm );
+        realms.clear();
+    }
+
+    public synchronized void disposeRealm( String id ) throws NoSuchRealmException
     {
         ClassRealm realm = realms.remove( id );
 
         if ( realm != null )
         {
-            try
-            {
-                realm.close();
-            }
-            catch ( IOException ignore )
-            {
-            }
-            for ( ClassWorldListener listener : listeners )
-            {
-                listener.realmDisposed( realm );
-            }
+            disposeRealm( realm );
+        }
+        else
+        {
+            throw new NoSuchRealmException( this, id );
+        }
+    }
+
+    private void disposeRealm( ClassRealm realm )
+    {
+        try
+        {
+            realm.close();
+        }
+        catch ( IOException ignore )
+        {
+        }
+        for ( ClassWorldListener listener : listeners )
+        {
+            listener.realmDisposed( realm );
         }
     }