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annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/Accessor.java @ 21557:31fc2fce38f3

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Merge.
author Doug Simon <doug.simon@oracle.com>
date Wed, 27 May 2015 13:32:18 +0200
parents b1530a6cce8c 3286fb5fea4a
children 2f9e4d984d16
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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. 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.impl;
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26
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27 import java.io.*;
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28 import java.lang.reflect.*;
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29 import java.util.*;
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30
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31 import com.oracle.truffle.api.*;
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32 import com.oracle.truffle.api.source.*;
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33 import com.oracle.truffle.api.vm.*;
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34
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35 /**
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36 * Communication between TruffleVM and TruffleLanguage API/SPI.
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37 */
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38 public abstract class Accessor {
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39 private static Accessor API;
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40 private static Accessor SPI;
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41 static {
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42 TruffleLanguage lng = new TruffleLanguage(null) {
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43 @Override
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44 protected Object eval(Source code) throws IOException {
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45 return null;
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46 }
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47
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48 @Override
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49 protected Object findExportedSymbol(String globalName) {
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50 return null;
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51 }
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52
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53 @Override
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54 protected Object getLanguageGlobal() {
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55 return null;
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56 }
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57
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58 @Override
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59 protected boolean isObjectOfLanguage(Object object) {
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60 return false;
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61 }
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62 };
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63 lng.hashCode();
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64 }
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65
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66 protected Accessor() {
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67 if (this.getClass().getSimpleName().endsWith("API")) {
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68 if (API != null) {
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69 throw new IllegalStateException();
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70 }
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71 API = this;
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72 } else {
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73 if (SPI != null) {
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74 throw new IllegalStateException();
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75 }
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76 SPI = this;
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77 }
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78 }
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79
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80 protected TruffleLanguage attachEnv(TruffleVM vm, Constructor<?> langClazz, Writer stdOut, Writer stdErr, Reader stdIn) {
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81 return API.attachEnv(vm, langClazz, stdOut, stdErr, stdIn);
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82 }
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83
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84 protected Object eval(TruffleLanguage l, Source s) throws IOException {
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85 return API.eval(l, s);
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86 }
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87
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88 protected Object importSymbol(TruffleVM vm, TruffleLanguage queryingLang, String globalName) {
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89 return SPI.importSymbol(vm, queryingLang, globalName);
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90 }
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91
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92 protected Object findExportedSymbol(TruffleLanguage l, String globalName) {
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93 return API.findExportedSymbol(l, globalName);
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94 }
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95
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96 protected Object languageGlobal(TruffleLanguage l) {
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97 return API.languageGlobal(l);
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98 }
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99
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100 protected Object invoke(Object obj, Object[] args) throws IOException {
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101 for (SymbolInvoker si : ServiceLoader.load(SymbolInvoker.class)) {
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102 return si.invoke(obj, args);
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103 }
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104 throw new IOException("No symbol invoker found!");
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105 }
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106
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107 }