| 1 | #region License Information
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| 2 | /* HeuristicLab
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| 3 | * Copyright (C) 2002-2012 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
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| 4 | *
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| 5 | * This file is part of HeuristicLab.
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| 6 | *
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| 7 | * HeuristicLab is free software: you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation, either version 3 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * HeuristicLab is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 15 | * GNU General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
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| 19 | */
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| 20 | #endregion
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| 21 |
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| 22 | using System;
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| 23 | using System.Collections.Generic;
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| 24 | using System.Text;
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| 25 | using System.Text.RegularExpressions;
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| 26 |
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| 27 | namespace HeuristicLab.Persistence.Auxiliary {
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| 28 |
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| 29 | /// <summary>
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| 30 | /// Error during type name parsing, thrown by <see cref="TypeNameParser"/>.
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| 31 | /// </summary>
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| 32 | public class ParseError : Exception {
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| 33 |
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| 34 | /// <summary>
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| 35 | /// Initializes a new instance of the <see cref="ParseError"/> class.
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| 36 | /// </summary>
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| 37 | /// <param name="message">The message.</param>
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| 38 | public ParseError(string message) : base(message) { }
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| 39 | }
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| 40 |
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| 41 | /// <summary>
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| 42 | /// Parse a .NET type name using the following grammar:
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| 43 | ///
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| 44 | /// <code>
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| 45 | /// TypeSpec := SimpleTypeSpec '&'?
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| 46 | ///
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| 47 | /// SimpleTypeSpec := (IDENTIFIER '.')*
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| 48 | /// (IDENTIFIER '+')*
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| 49 | /// IDENTIFIER
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| 50 | /// ( '`\d+[' Generics ']' )?
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| 51 | /// (\*|\[(\d+\.\.\d+|\d+\.\.\.|(|\*)(,(|\*))*)\])*
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| 52 | /// (',\s*' IDENTIFIER (',\s*' AssemblyProperty)* )?
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| 53 | ///
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| 54 | /// Generics := '[' SimpleTypeSpec ']' (',[' SimpleTypeSpec ']')
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| 55 | ///
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| 56 | /// AssemblyProperty := 'Version=' Version
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| 57 | /// | 'PublicKey(Token)?=[a-fA-F0-9]+'
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| 58 | /// | 'Culture=[a-zA-F0-9]+'
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| 59 | ///
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| 60 | /// Version := \d+\.\d+\.\d+\.\d+
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| 61 | ///
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| 62 | /// IDENTIFIER = [_a-zA-Z][_a-ZA-Z0-9]*
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| 63 | /// </code>
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| 64 | /// </summary>
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| 65 | public class TypeNameParser {
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| 66 |
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| 67 | /*
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| 68 | TypeSpec := SimpleTypeSpec '&'?
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| 69 |
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| 70 | SimpleTypeSpec := (IDENTIFIER '.')*
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| 71 | (IDENTIFIER '+')*
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| 72 | IDENTIFIER
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| 73 | ( '`\d+[' Generics ']' )?
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| 74 | (\*|\[(\d+\.\.\d+|\d+\.\.\.|(|\*)(,(|\*))*)\])*
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| 75 | (',\s*' IDENTIFIER (',\s*' AssemblyProperty)* )?
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| 76 |
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| 77 | Generics := '[' SimpleTypeSpec ']' (',[' SimpleTypeSpec ']')
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| 78 |
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| 79 | AssemblyProperty := 'Version=' Version
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| 80 | | 'PublicKey(Token)?=[a-fA-F0-9]+'
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| 81 | | 'Culture=[a-zA-F0-9]+'
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| 82 |
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| 83 | Version := \d+\.\d+\.\d+\.\d+
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| 84 |
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| 85 | IDENTIFIER = [_a-zA-Z][_a-ZA-Z0-9]*
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| 86 | */
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| 87 |
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| 88 |
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| 89 | private class Token {
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| 90 | private static Dictionary<string, string> tokens =
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| 91 | new Dictionary<string, string> {
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| 92 | {"-", "DASH"},
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| 93 | {"&", "AMPERSAND"},
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| 94 | {".", "DOT"},
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| 95 | {"+", "PLUS"},
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| 96 | {",", "COMMA"},
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| 97 | {"[", "OPEN_BRACKET"},
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| 98 | {"]", "CLOSE_BRACKET"},
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| 99 | {"*", "ASTERISK"},
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| 100 | {" ", "SPACE"},
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| 101 | {"=", "EQUALS"},
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| 102 | {"`", "BACKTICK"} };
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| 103 | private static Regex NumberRegex = new Regex("^\\d+$");
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| 104 | private static Regex IdentifierRegex = new Regex("^[_a-zA-Z][_a-zA-Z0-9]*$");
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| 105 | private static Regex TokenRegex = new Regex("[-&.+,\\[\\]* =`]|[a-f0-9]+|\\d+|[_a-zA-Z][_a-zA-Z0-9]*");
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| 106 | public string Name { get; private set; }
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| 107 | public string Value { get; private set; }
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| 108 | public bool IsIdentifier { get; private set; }
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| 109 | public int? Number { get; private set; }
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| 110 | public int Position { get; private set; }
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| 111 | private Token(string value, int pos) {
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| 112 | Position = pos;
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| 113 | if (tokens.ContainsKey(value)) {
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| 114 | Name = tokens[value];
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| 115 | } else if (NumberRegex.IsMatch(value)) {
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| 116 | Number = int.Parse(value);
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| 117 | } else {
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| 118 | Value = value;
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| 119 | IsIdentifier = IdentifierRegex.IsMatch(value);
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| 120 | }
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| 121 | }
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| 122 | public static IEnumerable<Token> Tokenize(string s) {
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| 123 | int pos = 0;
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| 124 | foreach (Match m in TokenRegex.Matches(s)) {
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| 125 | yield return new Token(m.Value, pos);
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| 126 | pos += m.Length;
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| 127 | }
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| 128 | }
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| 129 | public override string ToString() {
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| 130 | if (Name != null)
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| 131 | return "Token(" + Name + ")";
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| 132 | if (Value != null)
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| 133 | return "\"" + Value + "\"";
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| 134 | if (Number != null)
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| 135 | return Number.ToString();
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| 136 | return "<empty>";
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| 137 | }
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| 138 | }
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| 139 |
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| 140 | private Queue<Token> tokens;
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| 141 | private int Position {
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| 142 | get {
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| 143 | if (tokens.Count == 0)
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| 144 | return -1;
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| 145 | else
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| 146 | return tokens.Peek().Position;
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| 147 | }
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| 148 | }
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| 149 |
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| 150 | private TypeNameParser(string s) {
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| 151 | tokens = new Queue<Token>(Token.Tokenize(s));
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| 152 | }
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| 153 |
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| 154 | /// <summary>
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| 155 | /// Parses the specified typename string as obtained by
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| 156 | /// <c>System.Object.GetType().FullName"</c>.
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| 157 | /// </summary>
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| 158 | /// <param name="s">The typename string.</param>
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| 159 | /// <returns>A <see cref="TypeName"/> representing the type name.</returns>
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| 160 | public static TypeName Parse(string s) {
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| 161 | TypeNameParser p = new TypeNameParser(s);
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| 162 | try {
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| 163 | return p.TransformTypeSpec();
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| 164 | }
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| 165 | catch (ParseError x) {
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| 166 | if (p.Position > 0)
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| 167 | throw new ParseError(String.Format(
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| 168 | "Could not parse typename: {0}\n\"{1}====>{2}<===={3}",
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| 169 | x.Message,
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| 170 | s.Substring(0, p.Position),
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| 171 | s[p.Position],
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| 172 | s.Substring(p.Position, s.Length - p.Position)));
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| 173 | else
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| 174 | throw new ParseError(String.Format(
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| 175 | "Could not parse typenname \"{0}\" at end of input: {1}",
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| 176 | s,
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| 177 | x.Message));
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| 178 | }
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| 179 | }
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| 180 |
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| 181 | private TypeName TransformTypeSpec() {
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| 182 | TypeName t = TransformSimpleTypeSpec();
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| 183 | t.IsReference = ConsumeToken("AMPERSAND");
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| 184 | return t;
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| 185 | }
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| 186 |
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| 187 | private TypeName TransformSimpleTypeSpec() {
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| 188 | List<string> nameSpace = new List<string>();
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| 189 | nameSpace.Add(ConsumeIdentifier());
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| 190 | while (ConsumeToken("DOT"))
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| 191 | nameSpace.Add(ConsumeIdentifier());
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| 192 | List<string> className = new List<string>();
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| 193 | if (nameSpace.Count > 0) {
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| 194 | className.Add(nameSpace[nameSpace.Count - 1]);
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| 195 | nameSpace.RemoveAt(nameSpace.Count - 1);
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| 196 | }
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| 197 | while (ConsumeToken("PLUS"))
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| 198 | className.Add(ConsumeIdentifier());
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| 199 | TypeName typeName = new TypeName(
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| 200 | string.Join(".", nameSpace.ToArray()),
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| 201 | string.Join("+", className.ToArray()));
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| 202 | if (ConsumeToken("BACKTICK")) {
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| 203 | int nGenericArgs = ConsumeNumber();
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| 204 | if (ConsumeToken("OPEN_BRACKET") &&
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| 205 | CanConsumeToken("OPEN_BRACKET")) {
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| 206 | typeName.GenericArgs.AddRange(TransformGenerics());
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| 207 | ConsumeToken("CLOSE_BRACKET", true);
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| 208 | }
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| 209 | }
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| 210 | StringBuilder pointerOrArray = new StringBuilder();
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| 211 | while (true) {
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| 212 | if (ConsumeToken("ASTERSIK")) {
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| 213 | pointerOrArray.Append("*");
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| 214 | } else if (ConsumeToken("OPEN_BRACKET")) {
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| 215 | pointerOrArray.Append('[');
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| 216 | ParseDimension(pointerOrArray);
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| 217 | while (ConsumeToken("COMMA")) {
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| 218 | pointerOrArray.Append(",");
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| 219 | ParseDimension(pointerOrArray);
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| 220 | }
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| 221 | ConsumeToken("CLOSE_BRACKET", true);
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| 222 | pointerOrArray.Append(']');
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| 223 | } else {
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| 224 | break;
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| 225 | }
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| 226 | }
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| 227 | typeName.MemoryMagic = pointerOrArray.ToString();
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| 228 | if (ConsumeComma()) {
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| 229 | StringBuilder sb = new StringBuilder();
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| 230 | sb.Append(ConsumeIdentifier());
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| 231 | while (CanConsumeToken("DOT") ||
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| 232 | CanConsumeToken("DASH") ||
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| 233 | CanConsumeNumber() ||
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| 234 | CanConsumeIdentifier()) {
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| 235 | if (ConsumeToken("DOT"))
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| 236 | sb.Append('.');
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| 237 | else if (ConsumeToken("DASH"))
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| 238 | sb.Append('-');
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| 239 | else if (CanConsumeNumber())
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| 240 | sb.Append(ConsumeNumber());
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| 241 | else
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| 242 | sb.Append(ConsumeIdentifier());
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| 243 | }
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| 244 | typeName.AssemblyName = sb.ToString();
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| 245 | while (ConsumeComma()) {
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| 246 | KeyValuePair<string, string> property =
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| 247 | TransformAssemblyProperty();
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| 248 | typeName.AssemblyAttribues.Add(property.Key, property.Value);
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| 249 | }
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| 250 | }
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| 251 | return typeName;
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| 252 | }
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| 253 |
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| 254 | private void ParseDimension(StringBuilder sb) {
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| 255 | if (ConsumeToken("ASTERSIK")) {
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| 256 | sb.Append("*");
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| 257 | } else if (CanConsumeNumber()) {
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| 258 | sb.Append(ConsumeNumber());
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| 259 | ConsumeToken("DOT", true);
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| 260 | ConsumeToken("DOT", true);
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| 261 | if (ConsumeToken("DOT")) {
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| 262 | sb.Append("...");
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| 263 | } else {
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| 264 | sb.Append("..").Append(ConsumeNumber());
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| 265 | }
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| 266 | }
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| 267 | }
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| 268 |
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| 269 | private IEnumerable<TypeName> TransformGenerics() {
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| 270 | ConsumeToken("OPEN_BRACKET", true);
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| 271 | yield return TransformSimpleTypeSpec();
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| 272 | ConsumeToken("CLOSE_BRACKET", true);
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| 273 | while (ConsumeToken("COMMA")) {
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| 274 | ConsumeToken("OPEN_BRACKET", true);
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| 275 | yield return TransformSimpleTypeSpec();
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| 276 | ConsumeToken("CLOSE_BRACKET", true);
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| 277 | }
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| 278 | }
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| 279 |
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| 280 | private KeyValuePair<string, string> TransformAssemblyProperty() {
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| 281 | if (ConsumeIdentifier("Version")) {
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| 282 | ConsumeToken("EQUALS", true);
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| 283 | return new KeyValuePair<string, string>(
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| 284 | "Version",
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| 285 | TransformVersion());
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| 286 | } else if (ConsumeIdentifier("PublicKey")) {
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| 287 | return ConsumeAssignment("PublicKey");
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| 288 | } else if (ConsumeIdentifier("PublicKeyToken")) {
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| 289 | return ConsumeAssignment("PublicKeyToken");
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| 290 | } else if (ConsumeIdentifier("Culture")) {
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| 291 | return ConsumeAssignment("Culture");
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| 292 | } else if (ConsumeIdentifier("Custom")) {
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| 293 | return ConsumeAssignment("Custom");
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| 294 | } else {
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| 295 | throw new ParseError(String.Format(
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| 296 | "Invalid assembly property \"{0}\"",
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| 297 | tokens.Peek().ToString()));
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| 298 | }
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| 299 | }
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| 300 |
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| 301 | private KeyValuePair<string, string> ConsumeAssignment(string name) {
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| 302 | ConsumeToken("EQUALS", true);
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| 303 | return new KeyValuePair<string, string>(name, ConsumeToken());
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| 304 | }
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| 305 |
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| 306 | private string TransformVersion() {
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| 307 | StringBuilder version = new StringBuilder();
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| 308 | version.Append(ConsumeNumber());
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| 309 | ConsumeToken("DOT");
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| 310 | version.Append('.').Append(ConsumeNumber());
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| 311 | ConsumeToken("DOT");
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| 312 | version.Append('.').Append(ConsumeNumber());
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| 313 | ConsumeToken("DOT");
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| 314 | version.Append('.').Append(ConsumeNumber());
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| 315 | return version.ToString();
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| 316 | }
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| 317 |
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| 318 | private bool CanConsumeNumber() {
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| 319 | if (tokens.Count == 0)
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| 320 | return false;
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| 321 | return tokens.Peek().Number != null;
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| 322 | }
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| 323 |
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| 324 | private int ConsumeNumber() {
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| 325 | if (tokens.Count == 0)
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| 326 | throw new ParseError("End of input while expecting number");
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| 327 | if (tokens.Peek().Number != null)
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| 328 | return (int)tokens.Dequeue().Number;
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| 329 | throw new ParseError(string.Format(
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| 330 | "Number expected, found \"{0}\" instead",
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| 331 | tokens.Peek().ToString()));
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| 332 | }
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| 333 |
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| 334 | private bool ConsumeIdentifier(string value) {
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| 335 | if (tokens.Count == 0)
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| 336 | return false;
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| 337 | if (tokens.Peek().Value == value && tokens.Peek().IsIdentifier) {
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| 338 | tokens.Dequeue();
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| 339 | return true;
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| 340 | } else {
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| 341 | return false;
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| 342 | }
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| 343 | }
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| 344 |
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| 345 | private bool CanConsumeIdentifier() {
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| 346 | return tokens.Count > 0 && tokens.Peek().Value != null;
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| 347 | }
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| 348 |
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| 349 | private string ConsumeIdentifier() {
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| 350 | if (tokens.Count == 0)
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| 351 | throw new ParseError("End of input while expecting identifier");
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| 352 | if (tokens.Peek().Value != null && tokens.Peek().IsIdentifier)
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| 353 | return tokens.Dequeue().Value;
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| 354 | throw new ParseError(String.Format(
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| 355 | "Identifier expected, found \"{0}\" instead",
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| 356 | tokens.Peek().ToString()));
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| 357 | }
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| 358 |
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| 359 | private string ConsumeToken() {
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| 360 | if (tokens.Count == 0)
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| 361 | throw new ParseError("End of input while expecting token");
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| 362 | if (tokens.Peek().Value != null)
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| 363 | return tokens.Dequeue().Value;
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| 364 | throw new ParseError(String.Format(
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| 365 | "Token expected, found \"{0}\" instead",
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| 366 | tokens.Peek().ToString()));
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| 367 | }
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| 368 |
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| 369 | private bool ConsumeComma() {
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| 370 | if (ConsumeToken("COMMA")) {
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| 371 | while (ConsumeToken("SPACE")) ;
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| 372 | return true;
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| 373 | } else {
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| 374 | return false;
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| 375 | }
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| 376 | }
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| 377 |
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| 378 | private bool ConsumeToken(string name) {
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| 379 | return ConsumeToken(name, false);
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| 380 | }
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| 381 |
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| 382 | private bool CanConsumeToken(string name) {
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| 383 | if (tokens.Count == 0)
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| 384 | return false;
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| 385 | if (tokens.Peek().Name == name)
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| 386 | return true;
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| 387 | return false;
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| 388 | }
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| 389 |
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| 390 | private bool ConsumeToken(string name, bool force) {
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| 391 | if (tokens.Count == 0)
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| 392 | if (force)
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| 393 | throw new ParseError(String.Format(
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| 394 | "end of input while expecting token \"{0}\"",
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| 395 | name));
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| 396 | else
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| 397 | return false;
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| 398 | if (tokens.Peek().Name == name) {
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| 399 | tokens.Dequeue();
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| 400 | return true;
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| 401 | } else if (force) {
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| 402 | throw new ParseError(String.Format(
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| 403 | "expected \"{0}\" found \"{1}\"",
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| 404 | name,
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| 405 | tokens.Peek().ToString()));
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| 406 | } else {
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| 407 | return false;
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| 408 | }
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| 409 | }
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| 410 | }
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| 411 | } |
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