--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/share/classes/com/sun/tools/javac/api/BasicJavacTask.java	Tue Feb 28 10:33:49 2012 -0800
@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package com.sun.tools.javac.api;
+
+import java.io.IOException;
+import java.util.Locale;
+
+import javax.annotation.processing.Processor;
+import javax.lang.model.element.Element;
+import javax.lang.model.type.TypeMirror;
+import javax.lang.model.util.Elements;
+import javax.lang.model.util.Types;
+import javax.tools.JavaFileObject;
+
+import com.sun.source.tree.CompilationUnitTree;
+import com.sun.source.tree.Tree;
+import com.sun.source.util.JavacTask;
+import com.sun.source.util.TaskListener;
+import com.sun.tools.javac.model.JavacElements;
+import com.sun.tools.javac.model.JavacTypes;
+import com.sun.tools.javac.tree.JCTree;
+import com.sun.tools.javac.util.Context;
+import java.util.Collection;
+
+/**
+ * Provides basic functionality for implementations of JavacTask.
+ *
+ * <p><b>This is NOT part of any supported API.
+ * If you write code that depends on this, you do so at your own
+ * risk.  This code and its internal interfaces are subject to change
+ * or deletion without notice.</b></p>
+ */
+public class BasicJavacTask extends JavacTask {
+    protected Context context;
+    private TaskListener taskListener;
+
+    public BasicJavacTask(Context c, boolean register) {
+        context = c;
+        if (register)
+            context.put(JavacTask.class, this);
+    }
+
+    @Override
+    public Iterable<? extends CompilationUnitTree> parse() throws IOException {
+        throw new IllegalStateException();
+    }
+
+    @Override
+    public Iterable<? extends Element> analyze() throws IOException {
+        throw new IllegalStateException();
+    }
+
+    @Override
+    public Iterable<? extends JavaFileObject> generate() throws IOException {
+        throw new IllegalStateException();
+    }
+
+    @Override
+    public void setTaskListener(TaskListener tl) {
+        MultiTaskListener mtl = MultiTaskListener.instance(context);
+        if (taskListener != null)
+            mtl.remove(taskListener);
+        if (tl != null)
+            mtl.add(tl);
+        taskListener = tl;
+    }
+
+    @Override
+    public void addTaskListener(TaskListener taskListener) {
+        MultiTaskListener mtl = MultiTaskListener.instance(context);
+        mtl.add(taskListener);
+    }
+
+    @Override
+    public void removeTaskListener(TaskListener taskListener) {
+        MultiTaskListener mtl = MultiTaskListener.instance(context);
+        mtl.remove(taskListener);
+    }
+
+    public Collection<TaskListener> getTaskListeners() {
+        MultiTaskListener mtl = MultiTaskListener.instance(context);
+        return mtl.getTaskListeners();
+    }
+
+    @Override
+    public TypeMirror getTypeMirror(Iterable<? extends Tree> path) {
+        // TODO: Should complete attribution if necessary
+        Tree last = null;
+        for (Tree node : path)
+            last = node;
+        return ((JCTree)last).type;
+    }
+
+    @Override
+    public Elements getElements() {
+        return JavacElements.instance(context);
+    }
+
+    @Override
+    public Types getTypes() {
+        return JavacTypes.instance(context);
+    }
+
+    public void setProcessors(Iterable<? extends Processor> processors) {
+        throw new IllegalStateException();
+    }
+
+    public void setLocale(Locale locale) {
+        throw new IllegalStateException();
+    }
+
+    public Boolean call() {
+        throw new IllegalStateException();
+    }
+
+}