opensim – Blame information for rev 1
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1 | eva | 1 | /* |
2 | * Copyright (C) 2007-2008, Jeff Thompson |
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3 | * |
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4 | * All rights reserved. |
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5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions are met: |
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8 | * |
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9 | * * Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * * Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * * Neither the name of the copyright holder nor the names of its contributors |
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15 | * may be used to endorse or promote products derived from this software |
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16 | * without specific prior written permission. |
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17 | * |
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18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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19 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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20 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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21 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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22 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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23 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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24 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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25 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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26 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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27 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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28 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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29 | */ |
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30 | |||
31 | using System; |
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32 | |||
33 | namespace OpenSim.Region.ScriptEngine.Shared.YieldProlog |
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34 | { |
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35 | /// <summary> |
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36 | /// A PrologException is used as the exception thrown by YP.throw(Term). |
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37 | /// </summary> |
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38 | public class PrologException : Exception |
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39 | { |
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40 | public readonly object _term; |
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41 | |||
42 | /// <summary> |
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43 | /// Create a PrologException with the given Term. The printable exception message is the full Term. |
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44 | /// </summary> |
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45 | /// <param name="Term">the term of the exception</param> |
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46 | public PrologException(object Term) |
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47 | : base(YP.getValue(Term).ToString()) |
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48 | { |
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49 | _term = YP.makeCopy(Term, new Variable.CopyStore()); |
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50 | } |
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51 | |||
52 | /// <summary> |
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53 | /// Create a PrologException where the Term is error(ErrorTerm, Message). |
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54 | /// This uses YP.makeCopy to copy the ErrorTerm and Message so that they are valid after unbinding. |
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55 | /// </summary> |
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56 | /// <param name="ErrorTerm">the error term of the error</param> |
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57 | /// <param name="Messsage">the message term of the error. If this is a string, it is converted to an |
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58 | /// Atom so it can be used by Prolog code. |
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59 | /// Message, converted to a string, is use as the printable exception message. |
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60 | /// </param> |
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61 | public PrologException(object ErrorTerm, object Message) |
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62 | : base(YP.getValue(Message).ToString()) |
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63 | { |
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64 | if (Message is string) |
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65 | Message = Atom.a((string)Message); |
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66 | _term = YP.makeCopy(new Functor2(Atom.a("error"), ErrorTerm, Message), new Variable.CopyStore()); |
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67 | } |
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68 | |||
69 | public class TypeErrorInfo |
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70 | { |
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71 | public readonly Atom _Type; |
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72 | public readonly object _Culprit; |
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73 | public readonly object _Message; |
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74 | |||
75 | public TypeErrorInfo(Atom Type, object Culprit, object Message) |
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76 | { |
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77 | _Type = Type; |
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78 | _Culprit = Culprit; |
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79 | _Message = Message; |
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80 | } |
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81 | } |
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82 | /// <summary> |
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83 | /// Return the TypeErrorInfo for this exception, or null if _term does not match |
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84 | /// error(type_error(Type, Culprit), Message). |
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85 | /// </summary> |
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86 | /// <returns></returns> |
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87 | public TypeErrorInfo getTypeErrorInfo() |
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88 | { |
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89 | if (!(_term is Functor2 && ((Functor2)_term)._name._name == "error")) |
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90 | return null; |
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91 | object errorTerm = ((Functor2)_term)._arg1; |
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92 | if (!(errorTerm is Functor2 && ((Functor2)errorTerm)._name._name == "type_error")) |
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93 | return null; |
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94 | if (!(((Functor2)errorTerm)._arg1 is Atom)) |
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95 | return null; |
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96 | return new TypeErrorInfo |
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97 | ((Atom)((Functor2)errorTerm)._arg1, ((Functor2)errorTerm)._arg2, ((Functor2)_term)._arg2); |
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98 | } |
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99 | |||
100 | public class ExistenceErrorInfo |
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101 | { |
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102 | public readonly Atom _Type; |
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103 | public readonly object _Culprit; |
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104 | public readonly object _Message; |
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105 | |||
106 | public ExistenceErrorInfo(Atom Type, object Culprit, object Message) |
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107 | { |
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108 | _Type = Type; |
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109 | _Culprit = Culprit; |
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110 | _Message = Message; |
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111 | } |
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112 | |||
113 | /// <summary> |
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114 | /// If _Type is procedure and _Culprit is name/artity, return the name. Otherwise return null. |
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115 | /// </summary> |
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116 | /// <returns></returns> |
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117 | public object getProcedureName() |
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118 | { |
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119 | if (!(_Type._name == "procedure" && |
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120 | _Culprit is Functor2 && ((Functor2)_Culprit)._name == Atom.SLASH)) |
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121 | return null; |
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122 | return ((Functor2)_Culprit)._arg1; |
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123 | } |
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124 | |||
125 | /// <summary> |
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126 | /// If _Type is procedure and _Culprit is name/arity and arity is an integer, return the arity. |
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127 | /// Otherwise return -1. |
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128 | /// </summary> |
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129 | /// <returns></returns> |
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130 | public int getProcedureArity() |
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131 | { |
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132 | if (!(_Type._name == "procedure" && |
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133 | _Culprit is Functor2 && ((Functor2)_Culprit)._name == Atom.SLASH)) |
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134 | return -1; |
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135 | if (!(((Functor2)_Culprit)._arg2 is int)) |
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136 | return -1; |
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137 | return (int)((Functor2)_Culprit)._arg2; |
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138 | } |
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139 | } |
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140 | /// <summary> |
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141 | /// Return the ExistenceErrorInfo for this exception, or null if _term does not match |
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142 | /// error(existence_error(Type, Culprit), Message). If the returned ExistenceErrorInfo _Culprit is |
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143 | /// procedure, you can use its getProcedureName and getProcedureArity. |
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144 | /// </summary> |
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145 | /// <returns></returns> |
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146 | public ExistenceErrorInfo getExistenceErrorInfo() |
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147 | { |
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148 | if (!(_term is Functor2 && ((Functor2)_term)._name._name == "error")) |
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149 | return null; |
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150 | object errorTerm = ((Functor2)_term)._arg1; |
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151 | if (!(errorTerm is Functor2 && ((Functor2)errorTerm)._name._name == "existence_error")) |
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152 | return null; |
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153 | if (!(((Functor2)errorTerm)._arg1 is Atom)) |
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154 | return null; |
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155 | return new ExistenceErrorInfo |
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156 | ((Atom)((Functor2)errorTerm)._arg1, ((Functor2)errorTerm)._arg2, ((Functor2)_term)._arg2); |
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157 | } |
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158 | } |
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159 | } |