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annotate truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/ChildNodeTest.java @ 22157:dc83cc1f94f2

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Using fully qualified imports
author Jaroslav Tulach <jaroslav.tulach@oracle.com>
date Wed, 16 Sep 2015 11:33:22 +0200
parents 5bc7f7b867ab
children 14e6dfb1ef05
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1 /*
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2 * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.truffle.api.test;
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24
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25 import com.oracle.truffle.api.CallTarget;
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26 import com.oracle.truffle.api.Truffle;
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27 import com.oracle.truffle.api.TruffleRuntime;
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28 import com.oracle.truffle.api.frame.VirtualFrame;
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29 import com.oracle.truffle.api.nodes.Node;
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30 import com.oracle.truffle.api.nodes.Node.Child;
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31 import com.oracle.truffle.api.nodes.RootNode;
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32 import java.util.Iterator;
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33 import org.junit.Assert;
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34 import org.junit.Test;
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35
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36 /**
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37 * <h3>Creating a Child Node</h3>
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38 *
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39 * <p>
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40 * Child nodes are stored in the class of the parent node in fields that are marked with the
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41 * {@link Child} annotation. The {@link Node#getParent()} method allows access to this field. Every
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42 * node also provides the ability to iterate over its children using {@link Node#getChildren()}.
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43 * </p>
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44 *
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45 * <p>
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46 * A child node field must be declared private and non-final. It may only be assigned in the
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47 * constructor of the parent node. For changing the structure of the tree at run time, the method
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48 * {@link Node#replace(Node)} must be used (see {@link ReplaceTest}).
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49 * </p>
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50 *
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51 * <p>
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52 * The next part of the Truffle API introduction is at
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53 * {@link com.oracle.truffle.api.test.ChildrenNodesTest}.
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54 * </p>
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55 */
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56 public class ChildNodeTest {
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57
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58 @Test
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59 public void test() {
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60 TruffleRuntime runtime = Truffle.getRuntime();
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61 TestChildNode leftChild = new TestChildNode();
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62 TestChildNode rightChild = new TestChildNode();
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63 TestRootNode rootNode = new TestRootNode(leftChild, rightChild);
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64 CallTarget target = runtime.createCallTarget(rootNode);
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65 Assert.assertEquals(rootNode, leftChild.getParent());
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66 Assert.assertEquals(rootNode, rightChild.getParent());
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67 Iterator<Node> iterator = rootNode.getChildren().iterator();
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68 Assert.assertEquals(leftChild, iterator.next());
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69 Assert.assertEquals(rightChild, iterator.next());
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70 Assert.assertFalse(iterator.hasNext());
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71 Object result = target.call();
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72 Assert.assertEquals(42, result);
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73 }
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75 class TestRootNode extends RootNode {
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77 @Child private TestChildNode left;
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78 @Child private TestChildNode right;
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80 public TestRootNode(TestChildNode left, TestChildNode right) {
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81 super(TestingLanguage.class, null, null);
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82 this.left = left;
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83 this.right = right;
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84 }
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85
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86 @Override
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87 public Object execute(VirtualFrame frame) {
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88 return left.execute() + right.execute();
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89 }
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90 }
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92 class TestChildNode extends Node {
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93
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94 public TestChildNode() {
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95 super(null);
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96 }
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97
7267
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98 public int execute() {
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99 return 21;
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100 }
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101 }
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102 }