Index: modules/analysis/common/src/test/org/apache/lucene/analysis/core/TestTypeTokenFilter.java
===================================================================
--- modules/analysis/common/src/test/org/apache/lucene/analysis/core/TestTypeTokenFilter.java	(revision 1239491)
+++ modules/analysis/common/src/test/org/apache/lucene/analysis/core/TestTypeTokenFilter.java	(working copy)
@@ -27,6 +27,7 @@
 
 import java.io.IOException;
 import java.io.StringReader;
+import java.util.Collections;
 import java.util.Set;
 
 
@@ -83,6 +84,13 @@
     stpf.close();
   }
 
+  public void testTypeFilterWhitelist() throws IOException {
+    StringReader reader = new StringReader("121 is palindrome, while 123 is not");
+    Set<String> stopTypes = Collections.singleton("<NUM>");
+    TokenStream stream = new TypeTokenFilter(true, new StandardTokenizer(TEST_VERSION_CURRENT, reader), stopTypes, true);
+    assertTokenStreamContents(stream, new String[]{"121", "123"});
+  }
+
   // print debug info depending on VERBOSE
   private static void log(String s) {
     if (VERBOSE) {
Index: modules/analysis/common/src/java/org/apache/lucene/analysis/core/TypeTokenFilter.java
===================================================================
--- modules/analysis/common/src/java/org/apache/lucene/analysis/core/TypeTokenFilter.java	(revision 1239491)
+++ modules/analysis/common/src/java/org/apache/lucene/analysis/core/TypeTokenFilter.java	(working copy)
@@ -31,17 +31,24 @@
 
   private final Set<String> stopTypes;
   private final TypeAttribute typeAttribute = addAttribute(TypeAttribute.class);
+  private final boolean useWhiteList;
 
-  public TypeTokenFilter(boolean enablePositionIncrements, TokenStream input, Set<String> stopTypes) {
+  public TypeTokenFilter(boolean enablePositionIncrements, TokenStream input, Set<String> stopTypes, boolean useWhiteList) {
     super(enablePositionIncrements, input);
     this.stopTypes = stopTypes;
+    this.useWhiteList = useWhiteList;
   }
 
+  public TypeTokenFilter(boolean enablePositionIncrements, TokenStream input, Set<String> stopTypes) {
+    this(enablePositionIncrements, input, stopTypes, false);
+  }
+
   /**
-   * Returns the next input Token whose typeAttribute.type() is not a stop type.
+   * By default accept the token if its type is not a stop type.
+   * When the useWhiteList parameter is set to true then accept the token if its type is contained in the stopTypes
    */
   @Override
   protected boolean accept() throws IOException {
-    return !stopTypes.contains(typeAttribute.type());
+    return useWhiteList == stopTypes.contains(typeAttribute.type());
   }
 }