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annotate graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/model/GuardExpression.java @ 16766:90984ae0eaa8

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Truffle-DSL: Fixed headers.
author Christian Humer <christian.humer@gmail.com>
date Mon, 11 Aug 2014 17:29:24 +0200
parents e6d15134ca86
children 2db61eddcb97
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16766
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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
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31 private final String guardName;
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32 private final boolean negated;
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33
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34 public GuardExpression(String expression) {
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35 if (expression.startsWith("!")) {
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36 guardName = expression.substring(1, expression.length());
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37 negated = true;
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38 } else {
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39 guardName = expression;
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40 negated = false;
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41 }
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42 }
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43
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44 public boolean isResolved() {
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45 return resolvedGuard != null;
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46 }
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47
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48 public String getGuardName() {
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49 return guardName;
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50 }
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51
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52 public void setGuard(GuardData guard) {
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53 this.resolvedGuard = guard;
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54 }
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55
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56 @Override
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57 public boolean equals(Object obj) {
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58 if (obj instanceof GuardExpression) {
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59 GuardExpression other = (GuardExpression) obj;
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60 if (isResolved() && other.isResolved()) {
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61 return resolvedGuard.equals(other.resolvedGuard) && negated == other.negated;
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62 } else {
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63 return guardName.equals(other.guardName) && negated == other.negated;
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64 }
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65 }
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66 return false;
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67 }
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68
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69 @Override
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70 public int hashCode() {
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71 return Objects.hash(guardName, negated, resolvedGuard);
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72 }
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73
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74 public final boolean implies(GuardExpression other) {
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75 if (other == this) {
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76 return true;
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77 }
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78 if (getGuardName().equals(other.getGuardName())) {
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79 if (isNegated() == other.isNegated()) {
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80 return true;
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81 }
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82 }
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83
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84 if (isResolved() && other.isResolved()) {
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85 for (GuardExpression implies : getResolvedGuard().getImpliesExpressions()) {
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86 if (implies.getGuardName().equals(other.getGuardName())) {
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87 if (implies.isNegated() == other.isNegated()) {
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88 return true;
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89 }
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90 }
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91 }
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92 }
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93 return false;
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94 }
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95
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96 @Override
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97 public String toString() {
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98 return (negated ? "!" : "") + guardName;
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99 }
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100
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101 public boolean isNegated() {
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102 return negated;
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103 }
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104
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105 public GuardData getResolvedGuard() {
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106 return resolvedGuard;
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107 }
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108
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109 }