--- /dev/null	2015-03-09 08:23:42.456618816 +0530
+++ new/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/api/tree/ParserImpl.java	2015-03-09 18:39:28.603824875 +0530
@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2015, 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 jdk.nashorn.api.tree;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.io.Reader;
+import java.net.URL;
+import java.nio.file.Path;
+import java.util.Map;
+import java.util.Objects;
+import jdk.nashorn.api.scripting.NashornException;
+import jdk.nashorn.api.scripting.ScriptObjectMirror;
+import jdk.nashorn.internal.ir.FunctionNode;
+import jdk.nashorn.internal.runtime.Context;
+import jdk.nashorn.internal.runtime.ErrorManager;
+import jdk.nashorn.internal.runtime.JSType;
+import jdk.nashorn.internal.runtime.ParserException;
+import jdk.nashorn.internal.runtime.ScriptEnvironment;
+import jdk.nashorn.internal.runtime.Source;
+import jdk.nashorn.internal.runtime.options.Options;
+
+final class ParserImpl implements Parser {
+
+    private final ScriptEnvironment env;
+    
+    ParserImpl(final String... args) throws IllegalArgumentException {
+       Objects.requireNonNull(args);
+       Options options = new Options("nashorn");
+       options.process(args);
+       this.env = new ScriptEnvironment(options, 
+               new PrintWriter(System.out), new PrintWriter(System.err));   
+    }
+    
+    @Override
+    public CompilationUnitTree parse(final File file, final DiagnosticListener listener) throws IOException, NashornException {
+        Objects.requireNonNull(file);
+        final Source src = Source.sourceFor(file.getName(), file);
+        return translate(makeParser(src, listener).parse());
+    }
+
+    @Override
+    public CompilationUnitTree parse(final Path path, final DiagnosticListener listener) throws IOException, NashornException {
+        Objects.requireNonNull(path);
+        final Source src = Source.sourceFor(path.toString(), path);
+        return translate(makeParser(src, listener).parse());
+    }
+
+    @Override
+    public CompilationUnitTree parse(final URL url, final DiagnosticListener listener) throws IOException, NashornException {
+        final Source src = Source.sourceFor(url.toString(), url);
+        return translate(makeParser(src, listener).parse());
+    }
+
+    @Override
+    public CompilationUnitTree parse(final String name, final Reader reader, final DiagnosticListener listener) throws IOException, NashornException {
+        Objects.requireNonNull(name);
+        Objects.requireNonNull(reader);
+        final Source src = Source.sourceFor(name, reader);
+        return translate(makeParser(src, listener).parse());
+    }
+
+    @Override
+    public CompilationUnitTree parse(final String name, final String code, final DiagnosticListener listener) throws NashornException {
+        final Source src = Source.sourceFor(name, code);
+        return translate(makeParser(src, listener).parse());
+    }
+    
+    @Override
+    public CompilationUnitTree parse(final ScriptObjectMirror scriptObj, final DiagnosticListener listener) throws NashornException {
+        Objects.requireNonNull(scriptObj);
+        final Map<?,?> map = scriptObj;
+        if (map.containsKey("script") && map.containsKey("name")) {
+            final String script = JSType.toString(map.get("script"));
+            final String name   = JSType.toString(map.get("name"));
+            final Source src = Source.sourceFor(name, script);
+            return translate(makeParser(src, listener).parse());
+        } else {
+            throw new IllegalArgumentException("can't find 'script' and 'name' properties");
+        }
+    }
+    
+    private jdk.nashorn.internal.parser.Parser makeParser(final Source source, final DiagnosticListener listener) {
+        final ErrorManager errMgr = listener != null? new ListenerErrorManager(listener) : new Context.ThrowErrorManager();
+        return new jdk.nashorn.internal.parser.Parser(env, source, errMgr);
+    }
+    
+    private static class ListenerErrorManager extends ErrorManager {
+        private final DiagnosticListener listener;
+        
+        ListenerErrorManager(final DiagnosticListener listener) {
+            // null check
+            listener.getClass();
+            this.listener = listener;
+        }
+        
+        @Override
+        public void error(final String msg) {
+            error(new ParserException(msg));
+        }
+        
+        @Override
+        public void error(final ParserException e) {
+            listener.report(new DiagnosticImpl(e, Diagnostic.Kind.ERROR));
+        }
+        
+        @Override
+        public void warning(final String msg) {
+            warning(new ParserException(msg));
+        }
+        
+        @Override
+        public void warning(final ParserException e) {
+            listener.report(new DiagnosticImpl(e, Diagnostic.Kind.WARNING));
+        }
+    }
+    
+    private CompilationUnitTree translate(final FunctionNode node) {
+        return new IRTranslator().translate(node);
+    }
+}