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annotate truffle/com.oracle.truffle.api.vm/src/com/oracle/truffle/api/vm/SymbolInvokerImpl.java @ 22131:626862cfa58d

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removed unnecessary exception clause
author Doug Simon <doug.simon@oracle.com>
date Thu, 03 Sep 2015 17:56:41 +0200
parents 0589cc5cab30
children e70b20f4bb00
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1 /*
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2 * Copyright (c) 2014, 2015, 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. Oracle designates this
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8 * particular file as subject to the "Classpath" exception as provided
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9 * by Oracle in the LICENSE file that accompanied this code.
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10 *
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11 * This code is distributed in the hope that it will be useful, but WITHOUT
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 * version 2 for more details (a copy is included in the LICENSE file that
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15 * accompanied this code).
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16 *
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17 * You should have received a copy of the GNU General Public License version
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18 * 2 along with this work; if not, write to the Free Software Foundation,
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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20 *
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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22 * or visit www.oracle.com if you need additional information or have any
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23 * questions.
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24 */
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25 package com.oracle.truffle.api.vm;
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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.interop.*;
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30 import com.oracle.truffle.api.nodes.*;
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31
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32 final class SymbolInvokerImpl {
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33 @SuppressWarnings({"unchecked", "rawtypes"})
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34 static CallTarget createCallTarget(TruffleLanguage<?> lang, Object symbol, Object... arr) {
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35 Class<? extends TruffleLanguage<?>> type;
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36 if (lang != null) {
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37 type = (Class) lang.getClass();
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38 } else {
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39 type = (Class) TruffleLanguage.class;
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40 }
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41 RootNode symbolNode;
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42 if ((symbol instanceof String) || (symbol instanceof Number) || (symbol instanceof Boolean) || (symbol instanceof Character)) {
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43 symbolNode = new ConstantRootNode(type, symbol);
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44 } else {
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45 Node executeMain = Message.createExecute(arr.length).createNode();
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46 symbolNode = new TemporaryRoot(type, executeMain, (TruffleObject) symbol, arr.length);
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47 }
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48 return Truffle.getRuntime().createCallTarget(symbolNode);
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49 }
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50
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51 private static final class ConstantRootNode extends RootNode {
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52
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53 private final Object value;
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54
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55 public ConstantRootNode(Class<? extends TruffleLanguage<?>> lang, Object value) {
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56 super(lang, null, null);
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57 this.value = value;
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58 }
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59
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60 @Override
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61 public Object execute(VirtualFrame vf) {
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62 return value;
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63 }
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64 }
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65
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66 private static class TemporaryRoot extends RootNode {
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67 @Child private Node foreignAccess;
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68 @Child private ConvertNode convert;
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69 private final int argumentLength;
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70 private final TruffleObject function;
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71
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72 public TemporaryRoot(Class<? extends TruffleLanguage<?>> lang, Node foreignAccess, TruffleObject function, int argumentLength) {
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73 super(lang, null, null);
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74 this.foreignAccess = foreignAccess;
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75 this.convert = new ConvertNode();
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76 this.function = function;
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77 this.argumentLength = argumentLength;
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78 }
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79
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80 @Override
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81 public Object execute(VirtualFrame frame) {
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82 final Object[] args = frame.getArguments();
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83 if (args.length != argumentLength) {
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84 throw new ArgumentsMishmashException();
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85 }
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86 Object tmp = ForeignAccess.execute(foreignAccess, frame, function, args);
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87 return convert.convert(frame, tmp);
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88 }
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89 }
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90
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91 private static final class ConvertNode extends Node {
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92 @Child private Node isNull;
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93 @Child private Node isBoxed;
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94 @Child private Node unbox;
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95
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96 public ConvertNode() {
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97 this.isNull = Message.IS_NULL.createNode();
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98 this.isBoxed = Message.IS_BOXED.createNode();
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99 this.unbox = Message.UNBOX.createNode();
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100 }
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101
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102 Object convert(VirtualFrame frame, Object obj) {
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103 if (obj instanceof TruffleObject) {
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104 return convert(frame, (TruffleObject) obj);
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105 } else {
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106 return obj;
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107 }
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108 }
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109
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110 private Object convert(VirtualFrame frame, TruffleObject obj) {
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111 Object isBoxedResult;
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112 try {
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113 isBoxedResult = ForeignAccess.execute(isBoxed, frame, obj);
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114 } catch (IllegalArgumentException ex) {
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115 isBoxedResult = false;
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116 }
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117 if (Boolean.TRUE.equals(isBoxedResult)) {
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118 return ForeignAccess.execute(unbox, frame, obj);
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119 } else {
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120 try {
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121 Object isNullResult = ForeignAccess.execute(isNull, frame, obj);
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122 if (Boolean.TRUE.equals(isNullResult)) {
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123 return null;
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124 }
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125 } catch (IllegalArgumentException ex) {
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126 // fallthrough
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127 }
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128 }
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129 return obj;
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130 }
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131 }
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132 }