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annotate graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/model/GuardExpression.java @ 16766:90984ae0eaa8
Truffle-DSL: Fixed headers.
author | Christian Humer <christian.humer@gmail.com> |
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date | Mon, 11 Aug 2014 17:29:24 +0200 |
parents | e6d15134ca86 |
children | 2db61eddcb97 |
rev | line source |
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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 } |