nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/codegen/AstSerializer.java
--- a/nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/codegen/AstSerializer.java Tue Sep 01 12:57:41 2015 +0300
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,73 +0,0 @@
-/*
- * Copyright (c) 2010, 2014, 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.internal.codegen;
-
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.ObjectOutputStream;
-import java.util.Collections;
-import java.util.zip.Deflater;
-import java.util.zip.DeflaterOutputStream;
-import jdk.nashorn.internal.ir.Block;
-import jdk.nashorn.internal.ir.FunctionNode;
-import jdk.nashorn.internal.ir.LexicalContext;
-import jdk.nashorn.internal.ir.Node;
-import jdk.nashorn.internal.ir.Statement;
-import jdk.nashorn.internal.ir.visitor.NodeVisitor;
-import jdk.nashorn.internal.runtime.options.Options;
-
-/**
- * This static utility class performs serialization of FunctionNode ASTs to a byte array.
- * The format is a standard Java serialization stream, deflated.
- */
-final class AstSerializer {
- // Experimentally, we concluded that compression level 4 gives a good tradeoff between serialization speed
- // and size.
- private static final int COMPRESSION_LEVEL = Options.getIntProperty("nashorn.serialize.compression", 4);
- static byte[] serialize(final FunctionNode fn) {
- final ByteArrayOutputStream out = new ByteArrayOutputStream();
- final Deflater deflater = new Deflater(COMPRESSION_LEVEL);
- try (final ObjectOutputStream oout = new ObjectOutputStream(new DeflaterOutputStream(out, deflater))) {
- oout.writeObject(removeInnerFunctionBodies(fn));
- } catch (final IOException e) {
- throw new AssertionError("Unexpected exception serializing function", e);
- } finally {
- deflater.end();
- }
- return out.toByteArray();
- }
-
- private static FunctionNode removeInnerFunctionBodies(final FunctionNode fn) {
- return (FunctionNode)fn.accept(new NodeVisitor<LexicalContext>(new LexicalContext()) {
- @Override
- public Node leaveBlock(final Block block) {
- if (lc.isFunctionBody() && lc.getFunction(block) != lc.getOutermostFunction()) {
- return block.setStatements(lc, Collections.<Statement>emptyList());
- }
- return super.leaveBlock(block);
- }
- });
- }
-}