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author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Thu, 19 Mar 2015 17:22:24 -0700 |
parents | 1cde96b96673 |
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/* * Copyright (c) 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. * * 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.oracle.truffle.api.test; import org.junit.*; import com.oracle.truffle.api.*; import com.oracle.truffle.api.frame.*; import com.oracle.truffle.api.nodes.*; /** * <h3>Inserting Extra Nodes into the AST Transparently</h3> * * <p> * The {@link Node} class provides a callback that is invoked whenever a node is adopted in an AST * by insertion or replacement. Node classes can override the {@code onAdopt()} method to run extra * functionality upon adoption. * </p> * * <p> * This test demonstrates how node instances of a specific class can be automatically wrapped in * extra nodes when they are inserted into the AST. * </p> */ public class OnAdoptTest { static class Root extends RootNode { @Child private Base child1; @Child private Base child2; public Root(Base child1, Base child2) { super(null); this.child1 = child1; this.child2 = child2; } @Override public Object execute(VirtualFrame frame) { return child1.executeInt(frame) + child2.executeInt(frame); } } abstract static class Base extends Node { public abstract int executeInt(VirtualFrame frame); } static class Wrapper extends Base { @Child private Base wrappee; public Wrapper(Base wrappee) { this.wrappee = wrappee; } @Override public int executeInt(VirtualFrame frame) { return 1 + wrappee.executeInt(frame); } } abstract static class GenBase extends Base { private final int k; public GenBase(int k) { this.k = k; } @Override public int executeInt(VirtualFrame frame) { return k; } } static class Gen extends GenBase { public Gen(int k) { super(k); } } static class GenWrapped extends GenBase { public GenWrapped(int k) { super(k); } @Override protected void onAdopt() { Wrapper w = new Wrapper(this); this.replace(w); } } @Test public void testOnInsert() { TruffleRuntime runtime = Truffle.getRuntime(); Base b1 = new Gen(11); Base b2 = new GenWrapped(11); Root r = new Root(b1, b2); CallTarget ct = runtime.createCallTarget(r); Object result = ct.call(); Assert.assertEquals(23, result); } }