Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/ChildrenNodesTest.java @ 10924:f75695de1312
SchedulingPhase: use logging facilities instead of TTY
author | Bernhard Urban <bernhard.urban@jku.at> |
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date | Thu, 01 Aug 2013 18:59:31 +0200 |
parents | 5e3d1a68664e |
children | df1d665ca846 |
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/* * Copyright (c) 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. * * 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 java.util.*; import org.junit.*; import com.oracle.truffle.api.*; import com.oracle.truffle.api.frame.*; import com.oracle.truffle.api.nodes.*; /** * <h3>Creating an Array of Children Nodes</h3> * * <p> * An array of children nodes can be used as a field in a parent node. The field has to be annotated * with {@link com.oracle.truffle.api.nodes.Node.Children} and must be declared private and final. * Before assigning the field in the parent node constructor, {@link Node#adoptChildren} must be * called in order to update the parent pointers in the child nodes. After filling the array with * its first values, it must never be changed. It is only possible to call {@link Node#replace} on a * child node. * </p> * * <p> * The next part of the Truffle API introduction is at * {@link com.oracle.truffle.api.test.FinalFieldTest}. * </p> */ public class ChildrenNodesTest { @Test public void test() { TruffleRuntime runtime = Truffle.getRuntime(); TestChildNode firstChild = new TestChildNode(); TestChildNode secondChild = new TestChildNode(); TestRootNode rootNode = new TestRootNode(new TestChildNode[]{firstChild, secondChild}); Assert.assertEquals(rootNode, firstChild.getParent()); Assert.assertEquals(rootNode, secondChild.getParent()); Iterator<Node> iterator = rootNode.getChildren().iterator(); Assert.assertEquals(firstChild, iterator.next()); Assert.assertEquals(secondChild, iterator.next()); Assert.assertFalse(iterator.hasNext()); CallTarget target = runtime.createCallTarget(rootNode); Object result = target.call(); Assert.assertEquals(42, result); } class TestRootNode extends RootNode { @Children private final TestChildNode[] children; public TestRootNode(TestChildNode[] children) { this.children = adoptChildren(children); } @Override public Object execute(VirtualFrame frame) { int sum = 0; for (int i = 0; i < children.length; ++i) { sum += children[i].execute(); } return sum; } } class TestChildNode extends Node { public int execute() { return 21; } } }