| 1 | package de.ugoe.cs.swe.bnftools.validation;
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| 2 |
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| 3 | import java.util.ArrayList;
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| 4 | import java.util.List;
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| 5 |
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| 6 | import org.eclipse.xtext.EcoreUtil2;
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| 7 | import de.ugoe.cs.swe.bnftools.ebnf.Atom;
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| 8 | import de.ugoe.cs.swe.bnftools.ebnf.DefinitionList;
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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.ebnf.Term;
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| 14 |
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| 15 | public class EbnfAnalysisUtils {
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| 16 |
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| 17 | //----------------------------------------------------------------------------------------------------
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| 18 |
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| 19 | static public boolean isPassthroughRule(Rule rule) {
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| 20 | DefinitionList definitionList = rule.getDefinitionList();
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| 21 | if (definitionList == null)
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| 22 | return false;
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| 23 |
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| 24 | if (rule.getDefinitionList().getSingleDefinition().size() == 1) {
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| 25 | SingleDefinition element = rule.getDefinitionList().getSingleDefinition().get(0);
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| 26 | if (element.getTerms().size() == 1) {
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| 27 | Term first = element.getTerms().get(0);
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| 28 | if (first.getTermAtom() != null) {
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| 29 | Atom atom = (Atom) first.getTermAtom();
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| 30 | if (atom.getAtomRuleReference() != null)
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| 31 | return true;
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| 32 | }
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| 33 | }
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| 34 | }
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| 35 |
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| 36 | return false;
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| 37 | }
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| 38 |
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| 39 |
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| 40 |
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| 41 | //----------------------------------------------------------------------------------------------------
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| 42 |
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| 43 | static public boolean isTokenRule(Rule rule) {
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| 44 | DefinitionList definitionList = rule.getDefinitionList();
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| 45 | if (definitionList == null)
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| 46 | return false;
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| 47 |
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| 48 | if (rule.getDefinitionList().getSingleDefinition().size() == 1) {
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| 49 | SingleDefinition element = rule.getDefinitionList().getSingleDefinition().get(0);
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| 50 | if (element.getTerms().size() == 1) {
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| 51 | Term first = element.getTerms().get(0);
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| 52 | Atom atom = first.getTermAtom();
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| 53 | if (atom != null && atom.getAtomStringRule() != null) {
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| 54 | return true;
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| 55 | }
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| 56 | }
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| 57 | }
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| 58 |
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| 59 | return false;
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| 60 | }
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| 61 |
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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 | static public List<RuleReference> findReferences(Rule rule) {
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| 67 | List<RuleReference> ruleReferences = new ArrayList<RuleReference>();
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| 68 | EtsiBnf bnf = (EtsiBnf) rule.eContainer().eContainer();
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| 69 |
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| 70 | List<RuleReference> rules = EcoreUtil2.getAllContentsOfType(bnf, RuleReference.class);
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| 71 | for (RuleReference r : rules) {
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| 72 | if(r.getRuleref().getName().equals(rule.getName())){
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| 73 | ruleReferences.add(r);
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| 74 | }
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| 75 | }
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| 76 |
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| 77 | return ruleReferences;
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| 78 | }
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| 79 |
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| 80 | //----------------------------------------------------------------------------------------------------
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| 81 | public static List<Rule> getAllRules(EtsiBnf bnf){
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| 82 | List<Rule> rules = EcoreUtil2.getAllContentsOfType(bnf, Rule.class);
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| 83 | return rules;
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| 84 | }
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| 85 | }
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