diff --git a/proposal/sandbox/antlib/src/main/org/apache/tools/ant/Project.java b/proposal/sandbox/antlib/src/main/org/apache/tools/ant/Project.java
index f40ed1b3b..3a9b7fc98 100644
--- a/proposal/sandbox/antlib/src/main/org/apache/tools/ant/Project.java
+++ b/proposal/sandbox/antlib/src/main/org/apache/tools/ant/Project.java
@@ -70,6 +70,7 @@ import org.apache.tools.ant.types.FilterSet;
 import org.apache.tools.ant.types.FilterSetCollection;
 import org.apache.tools.ant.util.FileUtils;
 import org.apache.tools.ant.util.LazyHashtable;
+import org.apache.tools.ant.util.JavaEnvUtils;
 import org.apache.tools.ant.types.Path;
 import org.apache.tools.ant.taskdefs.Antlib;
 import org.apache.tools.ant.input.InputHandler;
@@ -132,6 +133,13 @@ public class Project {
 
     private static String javaVersion;
 
+    /**
+     * The class name of the Ant class loader to use for
+     * JDK 1.2 and above
+     */
+    private static final String ANTCLASSLOADER_JDK12
+        = "org.apache.tools.ant.loader.AntClassLoader2";
+
     /**
      *  Description of the Field
      */
@@ -463,6 +471,47 @@ public class Project {
     }
 
 
+    /**
+     * Factory method to create a class loader for loading classes
+     *
+     * @return an appropriate classloader
+     */
+    private AntClassLoader createClassLoader() {
+        AntClassLoader loader = null;
+        if (!JavaEnvUtils.isJavaVersion(JavaEnvUtils.JAVA_1_1)) {
+            try {
+                // 1.2+ - create advanced helper dynamically
+                Class loaderClass
+                    = Class.forName(ANTCLASSLOADER_JDK12);
+                loader = (AntClassLoader) loaderClass.newInstance();
+            } catch (Exception e) {
+                    log("Unable to create Class Loader: "
+                        + e.getMessage(), Project.MSG_DEBUG);
+            }
+        }
+
+        if (loader == null) {
+            loader = new AntClassLoader();
+        }
+
+        loader.setProject(this);
+        return loader;
+    }
+
+    /**
+     * Factory method to create a class loader for loading classes from
+     * a given path
+     *
+     * @param path the path from whcih clases are to be loaded.
+     *
+     * @return an appropriate classloader
+     */
+    public AntClassLoader createClassLoader(Path path) {
+        AntClassLoader loader = createClassLoader();
+        loader.setClassPath(path);
+        return loader;
+    }
+
     /**
      *  Sets the coreLoader attribute of the Project object
      *
diff --git a/proposal/sandbox/antlib/src/main/org/apache/tools/ant/antlib.xml b/proposal/sandbox/antlib/src/main/org/apache/tools/ant/antlib.xml
index 6a2f0a731..f74dcf49d 100644
--- a/proposal/sandbox/antlib/src/main/org/apache/tools/ant/antlib.xml
+++ b/proposal/sandbox/antlib/src/main/org/apache/tools/ant/antlib.xml
@@ -122,9 +122,17 @@
   <data-type name="patternset" class="org.apache.tools.ant.types.PatternSet"/>
   <data-type name="mapper" class="org.apache.tools.ant.types.Mapper"/>
   <data-type name="filterset" class="org.apache.tools.ant.types.FilterSet"/>
+  <data-type name="filterchain" class="org.apache.tools.ant.types.FilterChain" />
+  <data-type name="filterreader" class="org.apache.tools.ant.types.AntFilterReader" />
   <data-type name="description" class="org.apache.tools.ant.types.Description"/>
   <data-type name="substitution" class="org.apache.tools.ant.types.Substitution"/>
   <data-type name="regexp" class="org.apache.tools.ant.types.RegularExpression"/>
+  <data-type name="selector" class="org.apache.tools.ant.types.selectors.SelectSelector"/>
+  <data-type name="zipfileset" class="org.apache.tools.ant.types.ZipFileSet"/>
+  <data-type name="xmlcatalog" class="org.apache.tools.ant.types.XMLCatalog" />
+  <data-type name="extensionSet" class="org.apache.tools.ant.taskdefs.optional.extension.ExtensionSet" />
+  <data-type name="extension" class="org.apache.tools.ant.taskdefs.optional.extension.ExtensionAdapter" />
+  <data-type name="libfileset" class="org.apache.tools.ant.taskdefs.optional.extension.LibFileSet" />
 
   <!-- deprecated ant tasks (kept for back compatibility) -->