1 | /**
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2 | * generated by Xtext
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3 | */
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4 | package de.ugoe.cs.swe.bnftools.validation;
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5 |
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6 | import com.google.common.base.Objects;
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7 | import de.ugoe.cs.swe.bnftools.ebnf.DefinitionList;
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8 | import de.ugoe.cs.swe.bnftools.ebnf.EbnfPackage;
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9 | import de.ugoe.cs.swe.bnftools.ebnf.EtsiBnf;
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10 | import de.ugoe.cs.swe.bnftools.ebnf.Rule;
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11 | import de.ugoe.cs.swe.bnftools.ebnf.RuleReference;
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12 | import de.ugoe.cs.swe.bnftools.ebnf.SingleDefinition;
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13 | import de.ugoe.cs.swe.bnftools.validation.AbstractEbnfValidator;
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14 | import de.ugoe.cs.swe.bnftools.validation.EbnfAnalysisUtils;
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15 | import java.util.List;
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16 | import org.eclipse.emf.ecore.EObject;
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17 | import org.eclipse.xtext.nodemodel.ICompositeNode;
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18 | import org.eclipse.xtext.nodemodel.util.NodeModelUtils;
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19 | import org.eclipse.xtext.validation.Check;
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20 |
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21 | /**
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22 | * Custom validation rules.
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23 | *
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24 | * see http://www.eclipse.org/Xtext/documentation.html#validation
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25 | */
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26 | @SuppressWarnings("all")
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27 | public class EbnfValidator extends AbstractEbnfValidator {
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28 | private final static String ruleReferencedOneDescription = "The rule is only referenced by one other rule";
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29 |
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30 | private final static String passthroughRuleDescription = "The rule is a passthrough rule";
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31 |
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32 | private final static String unreferencedPassthroughRuleDescription = "The rule is an unreferenced passthrough rule";
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33 |
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34 | private final static String unusedRuleDescription = "The rule is not referenced anywhere";
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35 |
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36 | private final static String equalAlternativeDescription = "The rule contains equal alternatives";
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37 |
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38 | private final static String duplicateRulesDescription = "The rule is a duplicate";
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39 |
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40 | private final static String nonUniqueNameDescription = "The rule has the same Name as the Rule in Line ";
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41 |
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42 | /**
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43 | * Checks if a rule is only referenced by one other Rule, e.g.:
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44 | * a ::= b
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45 | * b ::= "foo"
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46 | */
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47 | @Check
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48 | public void checkReferencedOnlyOnce(final Rule rule) {
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49 | boolean _isTokenRule = EbnfAnalysisUtils.isTokenRule(rule);
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50 | if (_isTokenRule) {
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51 | return;
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52 | }
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53 | List<RuleReference> references = EbnfAnalysisUtils.findReferences(rule);
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54 | boolean _and = false;
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55 | int _size = references.size();
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56 | boolean _equals = (_size == 1);
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57 | if (!_equals) {
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58 | _and = false;
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59 | } else {
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60 | int _rulenumber = rule.getRulenumber();
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61 | boolean _notEquals = (_rulenumber != 1);
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62 | _and = _notEquals;
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63 | }
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64 | if (_and) {
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65 | this.warning(EbnfValidator.ruleReferencedOneDescription, EbnfPackage.Literals.RULE__NAME);
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66 | }
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67 | }
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68 |
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69 | /**
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70 | * Checks if a a rule has the same definition as another rule e.g.:
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71 | * a ::= "test"
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72 | * b ::= "test"
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73 | * (Problem: does not check if there is a permutation)
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74 | */
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75 | @Check
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76 | public void checkDuplicateRules(final Rule rule) {
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77 | EObject _eContainer = rule.eContainer();
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78 | EObject _eContainer_1 = _eContainer.eContainer();
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79 | EtsiBnf etsiBnf = ((EtsiBnf) _eContainer_1);
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80 | DefinitionList _definitionList = rule.getDefinitionList();
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81 | ICompositeNode definitionList = NodeModelUtils.findActualNodeFor(_definitionList);
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82 | String _text = definitionList.getText();
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83 | String _trim = _text.trim();
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84 | String rightHandSideText = _trim.replaceAll("[ \t\n\r]", "");
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85 | List<Rule> allRules = EbnfAnalysisUtils.getAllRules(etsiBnf);
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86 | for (final Rule currentRule : allRules) {
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87 | boolean _notEquals = (!Objects.equal(currentRule, rule));
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88 | if (_notEquals) {
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89 | DefinitionList _definitionList_1 = currentRule.getDefinitionList();
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90 | ICompositeNode currentRuleDefinitionList = NodeModelUtils.findActualNodeFor(_definitionList_1);
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91 | String _text_1 = currentRuleDefinitionList.getText();
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92 | String _trim_1 = _text_1.trim();
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93 | String currentRuleRightHandSideText = _trim_1.replaceAll("[ \t\n\r]",
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94 | "");
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95 | boolean _equals = currentRuleRightHandSideText.equals(rightHandSideText);
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96 | if (_equals) {
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97 | String _name = currentRule.getName();
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98 | String _plus = ((EbnfValidator.duplicateRulesDescription + " with rule \"") + _name);
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99 | String _plus_1 = (_plus +
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100 | "\" (Line ");
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101 | ICompositeNode _findActualNodeFor = NodeModelUtils.findActualNodeFor(currentRule);
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102 | int _startLine = _findActualNodeFor.getStartLine();
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103 | String _plus_2 = (_plus_1 + Integer.valueOf(_startLine));
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104 | String description = (_plus_2 + ")");
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105 | this.warning(description, EbnfPackage.Literals.RULE__NAME);
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106 | }
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107 | }
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108 | }
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109 | }
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110 |
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111 | /**
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112 | * Checks if a Rule got the same Name as another Rule, e.g.:
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113 | * a ::= "foo"
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114 | * a ::= "bar"
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115 | */
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116 | @Check
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117 | public void checkNameIsUnique(final Rule rule) {
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118 | EObject _eContainer = rule.eContainer();
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119 | EObject _eContainer_1 = _eContainer.eContainer();
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120 | final EtsiBnf bnf = ((EtsiBnf) _eContainer_1);
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121 | List<Rule> _allRules = EbnfAnalysisUtils.getAllRules(bnf);
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122 | for (final Rule r : _allRules) {
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123 | String _name = rule.getName();
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124 | String _name_1 = r.getName();
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125 | boolean _equals = _name.equals(_name_1);
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126 | if (_equals) {
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127 | boolean _equals_1 = r.equals(rule);
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128 | boolean _not = (!_equals_1);
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129 | if (_not) {
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130 | ICompositeNode _findActualNodeFor = NodeModelUtils.findActualNodeFor(r);
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131 | int _startLine = _findActualNodeFor.getStartLine();
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132 | String _plus = (EbnfValidator.nonUniqueNameDescription + Integer.valueOf(_startLine));
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133 | this.error(_plus,
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134 | EbnfPackage.Literals.RULE__NAME);
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135 | }
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136 | }
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137 | }
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138 | }
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139 |
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140 | /**
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141 | * Checks if a Rule, except for the #1 is not referenced, e.g.:
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142 | * a::= b
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143 | * b::="foo"
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144 | * c ::= "bar"
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145 | */
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146 | @Check
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147 | public void checkUnusedRule(final Rule rule) {
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148 | List<RuleReference> references = EbnfAnalysisUtils.findReferences(rule);
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149 | boolean _and = false;
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150 | int _size = references.size();
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151 | boolean _equals = (_size == 0);
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152 | if (!_equals) {
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153 | _and = false;
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154 | } else {
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155 | int _rulenumber = rule.getRulenumber();
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156 | boolean _notEquals = (_rulenumber != 1);
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157 | _and = _notEquals;
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158 | }
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159 | if (_and) {
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160 | this.warning(EbnfValidator.unusedRuleDescription, EbnfPackage.Literals.RULE__NAME);
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161 | }
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162 | }
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163 |
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164 | /**
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165 | * Checks if a rule got two equal alternatives, e.g.:
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166 | * a ::= b | "foo" | b
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167 | * (Problem:ignores whitespaces in literals)
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168 | */
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169 | @Check
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170 | public void checkEqualAlternative(final Rule rule) {
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171 | DefinitionList definitionList = rule.getDefinitionList();
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172 | List<SingleDefinition> singleDefinitions = definitionList.getSingleDefinition();
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173 | for (final SingleDefinition sDef1 : singleDefinitions) {
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174 | for (final SingleDefinition sDef2 : singleDefinitions) {
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175 | boolean _equals = sDef1.equals(sDef2);
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176 | boolean _not = (!_equals);
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177 | if (_not) {
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178 | ICompositeNode _findActualNodeFor = NodeModelUtils.findActualNodeFor(sDef1);
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179 | String _text = _findActualNodeFor.getText();
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180 | String _trim = _text.trim();
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181 | String d1 = _trim.replaceAll("[ \t\n\r]", "");
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182 | ICompositeNode _findActualNodeFor_1 = NodeModelUtils.findActualNodeFor(sDef2);
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183 | String _text_1 = _findActualNodeFor_1.getText();
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184 | String _trim_1 = _text_1.trim();
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185 | String d2 = _trim_1.replaceAll("[ \t\n\r]", "");
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186 | boolean _equals_1 = d1.equals(d2);
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187 | if (_equals_1) {
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188 | this.warning(EbnfValidator.equalAlternativeDescription, EbnfPackage.Literals.RULE__NAME, EbnfValidator.equalAlternativeDescription);
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189 | }
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190 | }
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191 | }
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192 | }
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193 | }
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194 |
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195 | /**
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196 | * Checks if a rule gets just passed through, e.g.:
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197 | * a ::= b | "literal"
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198 | * b ::= c
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199 | * c ::= "foo.bar"
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200 | */
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201 | @Check
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202 | public void checkPassthroughRule(final Rule rule) {
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203 | List<RuleReference> references = EbnfAnalysisUtils.findReferences(rule);
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204 | boolean _isPassthroughRule = EbnfAnalysisUtils.isPassthroughRule(rule);
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205 | if (_isPassthroughRule) {
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206 | int _size = references.size();
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207 | boolean _equals = (_size == 0);
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208 | if (_equals) {
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209 | this.warning(EbnfValidator.unreferencedPassthroughRuleDescription, EbnfPackage.Literals.RULE__NAME);
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210 | } else {
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211 | this.warning(EbnfValidator.passthroughRuleDescription, EbnfPackage.Literals.RULE__NAME, EbnfValidator.passthroughRuleDescription);
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212 | }
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213 | }
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214 | }
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215 | }
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