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annotate graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/model/GuardExpression.java @ 16851:2db61eddcb97

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Truffle-DSL: argument syntax support for guards
author Christian Humer <christian.humer@gmail.com>
date Mon, 18 Aug 2014 18:41:16 +0200
parents 90984ae0eaa8
children c88ab4f1f04a
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1 /*
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2 * Copyright (c) 2012, 2012, 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.dsl.processor.model;
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24
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25 import java.util.*;
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26
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27 public final class GuardExpression {
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28
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29 private GuardData resolvedGuard;
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30 private NodeExecutionData[] resolvedChildren;
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31
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32 private final String guardName;
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33 private final boolean negated;
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34 private final String[] childNames;
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35
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36 public GuardExpression(String expression, boolean allowArguments) {
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37 String exp = expression;
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38 if (exp.startsWith("!")) {
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39 exp = exp.substring(1, exp.length());
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40 negated = true;
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41 } else {
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42 negated = false;
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43 }
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44
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45 int argumentStart = exp.indexOf('(');
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46 int endIndex = exp.lastIndexOf(')');
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47 if (allowArguments && argumentStart != -1 && endIndex != -1) {
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48 guardName = exp.substring(0, argumentStart).trim();
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49 String arguments = exp.substring(argumentStart + 1, endIndex);
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50 String[] children = arguments.split(",");
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51 for (int i = 0; i < children.length; i++) {
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52 children[i] = children[i].trim();
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53 }
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54 if (children.length == 1 && children[0].isEmpty()) {
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55 childNames = new String[0];
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56 } else {
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57 childNames = children;
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58 }
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59 } else {
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60 guardName = exp;
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61 childNames = null;
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62 }
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63 }
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64
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65 public String[] getChildNames() {
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66 return childNames;
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67 }
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68
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69 public boolean isResolved() {
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70 return resolvedGuard != null;
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71 }
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72
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73 public String getGuardName() {
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74 return guardName;
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75 }
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76
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77 public NodeExecutionData[] getResolvedChildren() {
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78 return resolvedChildren;
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79 }
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80
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81 public void setResolvedChildren(NodeExecutionData[] resolvedChildren) {
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82 this.resolvedChildren = resolvedChildren;
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83 }
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84
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85 public void setResolvedGuard(GuardData guard) {
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86 this.resolvedGuard = guard;
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87 }
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88
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89 @Override
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90 public boolean equals(Object obj) {
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91 if (this == obj) {
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92 return true;
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93 } else if (obj instanceof GuardExpression) {
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94 GuardExpression other = (GuardExpression) obj;
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95 if (isResolved() && other.isResolved()) {
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96 return resolvedGuard.equals(other.resolvedGuard) && negated == other.negated && Arrays.equals(resolvedChildren, other.resolvedChildren);
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97 } else {
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98 boolean equal = guardName.equals(other.guardName) && negated == other.negated;
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99 if (childNames != null && other.childNames != null) {
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100 equal &= Arrays.equals(childNames, other.childNames);
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101 }
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102 return equal;
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103 }
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104 }
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105 return false;
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106 }
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107
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108 @Override
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109 public int hashCode() {
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110 return Objects.hash(guardName, negated, resolvedGuard, resolvedChildren);
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111 }
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112
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113 public final boolean implies(GuardExpression other) {
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114 if (equals(other)) {
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115 return true;
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116 }
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117
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118 if (isResolved() && other.isResolved()) {
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119 for (GuardExpression implies : getResolvedGuard().getImpliesExpressions()) {
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120 if (implies.getGuardName().equals(other.getGuardName())) {
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121 if (implies.isNegated() == other.isNegated()) {
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122 return true;
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123 }
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124 }
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125 }
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126 }
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127 return false;
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128 }
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129
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130 @Override
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131 public String toString() {
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132 return (negated ? "!" : "") + guardName;
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133 }
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134
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135 public boolean isNegated() {
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136 return negated;
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137 }
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138
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139 public GuardData getResolvedGuard() {
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Christian Humer <christian.humer@gmail.com>
parents: 16759
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140 return resolvedGuard;
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16759
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141 }
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16759
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142
e6d15134ca86 Truffle-DSL: fixed formatting problems.
Christian Humer <christian.humer@gmail.com>
parents: 16759
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143 }