| 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 de.ugoe.cs.swe.bnftools.ebnf.EbnfPackage
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| 7 | import java.util.List
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| 8 | import org.eclipse.xtext.validation.Check
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| 9 | import de.ugoe.cs.swe.bnftools.ebnf.Rule
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| 10 | import org.eclipse.xtext.nodemodel.util.NodeModelUtils
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| 11 | import org.eclipse.xtext.nodemodel.ICompositeNode
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| 12 | import de.ugoe.cs.swe.bnftools.ebnf.EtsiBnf
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| 13 | import de.ugoe.cs.swe.bnftools.ebnf.RuleReference
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| 14 | import de.ugoe.cs.swe.bnftools.ebnf.DefinitionList
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| 15 | import de.ugoe.cs.swe.bnftools.ebnf.SingleDefinition
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| 16 | import java.util.ArrayList
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| 17 | import com.google.inject.Inject
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| 18 | import org.eclipse.xtext.resource.IResourceDescriptions
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| 19 |
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| 20 | //import java.util.HashMap
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| 21 | //import java.util.Set
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| 22 | //import java.util.HashSet
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| 23 | //import org.eclipse.xtext.validation.Check
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| 24 | /**
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| 25 | * Custom validation rules.
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| 26 | *
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| 27 | * see http://www.eclipse.org/Xtext/documentation.html#validation
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| 28 | */
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| 29 | class EbnfValidator extends AbstractEbnfValidator {
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| 30 |
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| 31 |
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| 32 | @Inject
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| 33 | IResourceDescriptions resourceDescriptions;
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| 34 |
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| 35 |
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| 36 | public static final String ruleReferencedOneDescription = "The rule is only referenced by one other rule";
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| 37 | public static final String passthroughRuleDescription = "The rule is a passthrough rule";
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| 38 | public static final String unreferencedPassthroughRuleDescription = "The rule is an unreferenced passthrough rule";
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| 39 | public static final String unusedRuleDescription = "The rule is not referenced anywhere";
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| 40 | public static final String equalAlternativeDescription = "The rule contains equal alternatives";
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| 41 | public static final String duplicateRulesDescription = "The rule is a duplicate";
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| 42 |
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| 43 | //public static final String duplicateSubRulesDescription = "A part the of rule is a duplicate";
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| 44 | public static final String nonUniqueNameDescription = "The rule has the same Name as the Rule in Line ";
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| 45 |
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| 46 | // ----------------------------------------------------------------------------------------------------
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| 47 | /* Checks if a rule is only referenced by one other Rule, e.g.:
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| 48 | * a ::= b
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| 49 | * b ::= "foo"
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| 50 | */
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| 51 | @Check
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| 52 | def void checkReferencedOnlyOnce(Rule rule) {
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| 53 |
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| 54 | if (EbnfAnalysisUtils.isTokenRule(rule))
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| 55 | return;
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| 56 |
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| 57 | var List<Rule> references = EbnfAnalysisUtils.findReferences(rule,resourceDescriptions);
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| 58 | var List<RuleReference> references1 = EbnfAnalysisUtils.findReferences(rule);
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| 59 | if (references.size+references1.size == 1 && rule.rulenumber != 1) {
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| 60 | warning(ruleReferencedOneDescription, EbnfPackage$Literals::RULE__NAME, ruleReferencedOneDescription,
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| 61 | rule.name);
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| 62 | }
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| 63 | }
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| 64 |
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| 65 | // ----------------------------------------------------------------------------------------------------
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| 66 | /*Checks if a a rule has the same definition as another rule e.g.:
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| 67 | * a ::= "test"
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| 68 | * b ::= "test"
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| 69 | * (Problem: does not check if there is a permutation)
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| 70 | */
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| 71 | @Check
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| 72 | def void checkDuplicateRules(Rule rule) {
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| 73 |
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| 74 | //load bnf
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| 75 | var EtsiBnf etsiBnf = rule.eContainer().eContainer() as EtsiBnf;
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| 76 |
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| 77 | // find the rule in the parsetree
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| 78 | var ICompositeNode definitionList = NodeModelUtils.findActualNodeFor(rule.getDefinitionList());
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| 79 |
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| 80 | //get the definitionList as formatted string
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| 81 | var String rightHandSideText = definitionList.text.trim().replaceAll("[ \t\n\r]", "");
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| 82 |
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| 83 | //get All Rules
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| 84 | var List<Rule> allRules = EbnfAnalysisUtils.getAllRules(etsiBnf);
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| 85 |
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| 86 | // run through all Rules
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| 87 | for (currentRule : allRules) {
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| 88 | if (currentRule != rule) {
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| 89 | var ICompositeNode currentRuleDefinitionList = NodeModelUtils.findActualNodeFor(
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| 90 | currentRule.getDefinitionList());
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| 91 | var String currentRuleRightHandSideText = currentRuleDefinitionList.text.trim().replaceAll("[ \t\n\r]",
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| 92 | "");
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| 93 |
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| 94 | if (currentRuleRightHandSideText.equals(rightHandSideText)) {
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| 95 | var String description = duplicateRulesDescription + " with rule \"" + currentRule.getName() +
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| 96 | "\" (Line " + NodeModelUtils.findActualNodeFor(currentRule).getStartLine() + ")";
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| 97 | warning(description, EbnfPackage$Literals::RULE__NAME);
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| 98 | }
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| 99 | }
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| 100 | }
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| 101 |
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| 102 | // //get all Single Definitions as Trimmed Strings
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| 103 | // var List<String> singleDefsAsString = new ArrayList<String>();
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| 104 | //
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| 105 | // for (SingleDefinition s : (rule.definitionList).singleDefinition) {
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| 106 | // singleDefsAsString.add(NodeModelUtils.findActualNodeFor(s).text.trim().replaceAll("[ \t\n\r]", ""));
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| 107 | // }
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| 108 | //
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| 109 | // // for every rule get the single definitions as Strings
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| 110 | // var int j = 0;
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| 111 | // while (j<allRules.size) {
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| 112 | // var currentRule=allRules.get(j);
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| 113 | // if (currentRule != rule) {
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| 114 | // var List<String> singleDefsAsString1 = new ArrayList<String>();
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| 115 | //
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| 116 | // for (SingleDefinition s : ( currentRule.definitionList).singleDefinition) {
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| 117 | // singleDefsAsString1.add(NodeModelUtils.findActualNodeFor(s).text.trim().replaceAll("[ \t\n\r]", ""));
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| 118 | // }
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| 119 | //
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| 120 | // //for every String SingleDefinition find a corresponding ind the current rule
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| 121 | // if (singleDefsAsString.size == singleDefsAsString1.size) {
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| 122 | // var List<String> singleDefsAsStringCpy = singleDefsAsString.clone;
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| 123 | // var boolean equal = true;
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| 124 | // while (equal) {
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| 125 | // var String momentaryString = singleDefsAsStringCpy.get(0);
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| 126 | // var int i = 0;
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| 127 | // var boolean found = false;
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| 128 | // while (i < singleDefsAsString1.size && !found) {
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| 129 | // if (singleDefsAsString1.get(i).equals(momentaryString)) {
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| 130 | // singleDefsAsStringCpy.remove(0);
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| 131 | // singleDefsAsString1.remove(i);
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| 132 | // found = true
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| 133 | // }
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| 134 | // i++;
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| 135 | // }
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| 136 | // if (!found) {
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| 137 | // equal = false;
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| 138 | // }
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| 139 | // if (singleDefsAsStringCpy.empty) {
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| 140 | // var String description = duplicateRulesDescription + " with rule \"" + currentRule.getName() +
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| 141 | // "\" (Line " + NodeModelUtils.findActualNodeFor(currentRule).getStartLine() + ")";
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| 142 | // warning(description, EbnfPackage$Literals::RULE__NAME)
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| 143 | // }
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| 144 | // }
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| 145 | // }
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| 146 | //
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| 147 | // }
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| 148 | // j++;
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| 149 | // }
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| 150 | }
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| 151 |
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| 152 | // ----------------------------------------------------------------------------------------------------
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| 153 | /*Checks if a Rule got the same Name as another Rule, e.g.:
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| 154 | * a ::= "foo"
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| 155 | * a ::= "bar"
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| 156 | */
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| 157 | @Check
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| 158 | def void checkNameIsUnique(Rule rule) {
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| 159 | val EtsiBnf bnf = rule.eContainer.eContainer as EtsiBnf;
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| 160 | for (r : EbnfAnalysisUtils.getAllRules(bnf)) {
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| 161 | if (rule.name.equals(r.name)) {
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| 162 | if (!r.equals(rule)) {
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| 163 | error(nonUniqueNameDescription + NodeModelUtils.findActualNodeFor(r).startLine,
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| 164 | EbnfPackage$Literals::RULE__NAME)
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| 165 |
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| 166 | }
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| 167 | }
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| 168 | }
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| 169 | }
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| 170 |
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| 171 | // ----------------------------------------------------------------------------------------------------
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| 172 | /*Checks if a Rule, except for the #1 is not referenced, e.g.:
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| 173 | * a::= b
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| 174 | * b::="foo"
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| 175 | * c ::= "bar"
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| 176 | */
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| 177 | @Check
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| 178 | def void checkUnusedRule(Rule rule) {
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| 179 |
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| 180 | var List<RuleReference> references = EbnfAnalysisUtils.findReferences(rule);
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| 181 | var List<Rule> references1 = EbnfAnalysisUtils.findReferences(rule,resourceDescriptions);
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| 182 | if ((references.size+references1.size == 0) && (rule.getRulenumber() != 1))
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| 183 | warning(unusedRuleDescription, EbnfPackage$Literals::RULE__NAME, unusedRuleDescription, rule.name);
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| 184 | }
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| 185 |
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| 186 | // ----------------------------------------------------------------------------------------------------
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| 187 | /*Checks if a rule got two equal alternatives, e.g.:
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| 188 | * a ::= b | "foo" | b
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| 189 | *(Problem:ignores whitespaces in literals)
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| 190 | */
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| 191 | @Check
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| 192 | def void checkEqualAlternative(Rule rule) {
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| 193 |
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| 194 | var DefinitionList definitionList = rule.definitionList;
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| 195 |
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| 196 | var List<SingleDefinition> singleDefinitions = definitionList.singleDefinition;
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| 197 |
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| 198 | for (sDef1 : singleDefinitions) {
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| 199 | for (sDef2 : singleDefinitions) {
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| 200 | if (!sDef1.equals(sDef2)) {
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| 201 | var String d1 = NodeModelUtils.findActualNodeFor(sDef1).text.trim.replaceAll("[ \t\n\r]", "");
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| 202 | var String d2 = NodeModelUtils.findActualNodeFor(sDef2).text.trim.replaceAll("[ \t\n\r]", "");
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| 203 |
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| 204 | if (d1.equals(d2))
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| 205 | warning(equalAlternativeDescription, EbnfPackage$Literals::RULE__NAME,
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| 206 | equalAlternativeDescription, rule.name);
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| 207 | }
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| 208 | }
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| 209 | }
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| 210 |
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| 211 | }
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| 212 |
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| 213 | // ----------------------------------------------------------------------------------------------------
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| 214 | /* Checks if a rule gets just passed through, e.g.:
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| 215 | * a ::= b | "literal"
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| 216 | * b ::= c
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| 217 | * c ::= "foo.bar"
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| 218 | */
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| 219 | @Check
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| 220 | def void checkPassthroughRule(Rule rule) {
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| 221 |
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| 222 | var List<RuleReference> references = EbnfAnalysisUtils.findReferences(rule);
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| 223 | var List<Rule> references1 = EbnfAnalysisUtils.findReferences(rule,resourceDescriptions);
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| 224 | if (EbnfAnalysisUtils.isPassthroughRule(rule) && rule.rulenumber != 1) {
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| 225 | if (references.size+references1.size == 0) {
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| 226 | warning(unreferencedPassthroughRuleDescription, EbnfPackage$Literals::RULE__NAME);
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| 227 | } else {
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| 228 | warning(passthroughRuleDescription, EbnfPackage$Literals::RULE__NAME, passthroughRuleDescription,
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| 229 | rule.name);
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| 230 | }
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| 231 | }
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| 232 | }
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| 233 |
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| 234 | // ----------------------------------------------------------------------------------------------------
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| 235 | /* Checks if a subrule is used more then once, e.g.:
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| 236 | * a ::= (a b) e
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| 237 | * b ::= (a b) d
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| 238 | * _____
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| 239 | * (Not working, under construction)
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| 240 | */
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| 241 | // @Check
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| 242 | // def void checkSubruleDuplicates(EtsiBnf bnf){
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| 243 | // var HashMap<String, DuplicateEntry> dupesMap = new HashMap<String, DuplicateEntry>();
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| 244 | // var Set<String> taggedEntries = new HashSet<String>();
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| 245 | //
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| 246 | // var List<Rule> allRules = EbnfAnalysisUtils.getAllRules(bnf);
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| 247 | //
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| 248 | // for(rule: allRules){
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| 249 | // var List<SingleDefinition> subrules = rule.definitionList.singleDefinition
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| 250 | // for(subrule:subrules){
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| 251 | // var String subruleText = NodeModelUtils.findActualNodeFor(subrule).text.trim.replaceAll("[ \t\n\r]", "");
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| 252 | //
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| 253 | // }
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| 254 | // }
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| 255 | // }
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| 256 | }
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