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annotate graal/com.oracle.truffle.api.test/src/com/oracle/truffle/api/test/OnAdoptTest.java @ 19507:1cde96b96673

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Fixed code format issues.
author Roland Schatz <roland.schatz@oracle.com>
date Thu, 19 Feb 2015 16:15:56 +0100
parents 1cd02b4d90d1
children
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1 /*
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2 * Copyright (c) 2014, 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 org.junit.*;
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26
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27 import com.oracle.truffle.api.*;
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28 import com.oracle.truffle.api.frame.*;
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29 import com.oracle.truffle.api.nodes.*;
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30
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31 /**
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32 * <h3>Inserting Extra Nodes into the AST Transparently</h3>
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33 *
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34 * <p>
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35 * The {@link Node} class provides a callback that is invoked whenever a node is adopted in an AST
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36 * by insertion or replacement. Node classes can override the {@code onAdopt()} method to run extra
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37 * functionality upon adoption.
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38 * </p>
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39 *
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40 * <p>
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41 * This test demonstrates how node instances of a specific class can be automatically wrapped in
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42 * extra nodes when they are inserted into the AST.
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43 * </p>
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44 */
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45 public class OnAdoptTest {
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46
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47 static class Root extends RootNode {
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48
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49 @Child private Base child1;
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50 @Child private Base child2;
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51
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52 public Root(Base child1, Base child2) {
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53 super(null);
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54 this.child1 = child1;
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55 this.child2 = child2;
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56 }
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57
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58 @Override
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59 public Object execute(VirtualFrame frame) {
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60 return child1.executeInt(frame) + child2.executeInt(frame);
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61 }
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62
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63 }
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64
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65 abstract static class Base extends Node {
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66 public abstract int executeInt(VirtualFrame frame);
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67 }
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68
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69 static class Wrapper extends Base {
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70
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71 @Child private Base wrappee;
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72
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73 public Wrapper(Base wrappee) {
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74 this.wrappee = wrappee;
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75 }
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76
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77 @Override
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78 public int executeInt(VirtualFrame frame) {
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79 return 1 + wrappee.executeInt(frame);
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80 }
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81
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82 }
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83
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84 abstract static class GenBase extends Base {
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85
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86 private final int k;
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87
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88 public GenBase(int k) {
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89 this.k = k;
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90 }
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91
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92 @Override
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93 public int executeInt(VirtualFrame frame) {
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94 return k;
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95 }
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96
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97 }
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98
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99 static class Gen extends GenBase {
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100 public Gen(int k) {
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101 super(k);
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102 }
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103 }
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104
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105 static class GenWrapped extends GenBase {
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106
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107 public GenWrapped(int k) {
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108 super(k);
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109 }
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110
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111 @Override
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112 protected void onAdopt() {
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113 Wrapper w = new Wrapper(this);
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114 this.replace(w);
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115 }
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116
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117 }
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118
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119 @Test
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120 public void testOnInsert() {
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121 TruffleRuntime runtime = Truffle.getRuntime();
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122 Base b1 = new Gen(11);
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123 Base b2 = new GenWrapped(11);
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124 Root r = new Root(b1, b2);
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125 CallTarget ct = runtime.createCallTarget(r);
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126 Object result = ct.call();
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127 Assert.assertEquals(23, result);
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128 }
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129
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130 }