Examples with Literal org.apache.clerezza.commons.rdf.Literal used on opensource projects

Example 31 with Literal

use of org.apache.clerezza.commons.rdf.Literal in project stanbol by apache.

the class RdfRepresentation method removeTypedLiteral.

protected void removeTypedLiteral(IRI field, Object object) {
    Literal literal;
    try {
        literal = RdfResourceUtils.createLiteral(object);
    } catch (NoConvertorException e) {
        log.info("No Converter for value type " + object.getClass() + " (parsed for field " + field + ") use toString() Method to get String representation");
        literal = RdfResourceUtils.createLiteral(object.toString(), null);
    }
    graphNode.deleteProperty(field, literal);
}

Example 32 with Literal

use of org.apache.clerezza.commons.rdf.Literal in project stanbol by apache.

the class RdfResourceUtils method getLiteralValues.

/**
     * Extracts the literal values for the given list of languages (<code>null</code>
     * is supported).
     * <p>
     * Multiple languages are supported by this method to allow parsing
     * <code>null</code> in addition to a language. This is often used by applications
     * to search for literals in a given language in addition to literals with no
     * defined language.
     * <p>
     * As a convenience this methods adds literals with a language tag to the
     * front of the list and literals with no language tag to the end.
     *
     * @param literals the iterator over the literals
     * @param languages the array of languages (<code>null</code> is supported).
     * @return The collection with all the literal values.
     */
public static List<String> getLiteralValues(Iterator<Literal> literals, String... languages) {
    //permits null element!
    Set<Language> languageSet = new HashSet<Language>();
    for (String lang : languages) {
        languageSet.add(getLanguage(lang));
    }
    boolean containsNull = languageSet.contains(null);
    List<String> results = new ArrayList<String>();
    while (literals.hasNext()) {
        Literal act = literals.next();
        if (act.getLanguage() != null) {
            if (languageSet.contains(act.getLanguage())) {
                //add to front
                results.add(0, act.getLexicalForm());
            }
        } else if (containsNull) {
            //add also all types Literals, because the do not define an language!
            //append to the end
            results.add(act.getLexicalForm());
        }
    }
    return results;
}

Example 33 with Literal

use of org.apache.clerezza.commons.rdf.Literal in project stanbol by apache.

the class RdfRepresentationTest method testTypedLiteralToTextConversion.

/**
     * {@link TypedLiteral}s are used to represent literal values for different
     * xsd dataTypes within Clerezza. This method tests of {@link TypedLiteral}s
     * with the data type xsd:string are correctly treated like {@link String}
     * values. This tests especially if they are treated as natural language
     * texts without language.
     */
@Test
public void testTypedLiteralToTextConversion() {
    String field = "urn:test.RdfRepresentation:test.field";
    Literal stringLiteral = literalFactory.createTypedLiteral("This is a stirng value");
    //also add an integer to test that other typed literals are not used as texts
    Literal integerLiteral = literalFactory.createTypedLiteral(new Integer(5));
    Representation rep = createRepresentation(null);
    rep.add(field, Arrays.asList(stringLiteral, integerLiteral));
    //test if the literal is returned when asking for natural language text without language
    Iterator<Text> noLangTexts = rep.get(field, (String) null);
    assertTrue(noLangTexts.hasNext());
    assertEquals(stringLiteral.getLexicalForm(), noLangTexts.next().getText());
    assertFalse(noLangTexts.hasNext());
    //test that string literals are returned when asking for all natural language text values
    Iterator<Text> texts = rep.getText(field);
    assertTrue(texts.hasNext());
    assertEquals(stringLiteral.getLexicalForm(), texts.next().getText());
    assertFalse(texts.hasNext());
}

Example 34 with Literal

use of org.apache.clerezza.commons.rdf.Literal in project stanbol by apache.

the class ClerezzaRuleStore method findRulesByName.

@Override
public RuleList findRulesByName(String term) {
    String sparql = "SELECT ?recipe ?rule ?description " + "WHERE { " + "?recipe " + Symbols.hasRule + " ?rule . " + "?rule " + Symbols.ruleName + " ?name . " + "?rule " + Symbols.description + " ?description . " + "FILTER (regex(?name, \"" + term + "\", \"i\"))" + "}";
    List<IRI> recipeIDs = listRecipeIDs();
    Graph[] tripleCollections = new Graph[recipeIDs.size()];
    for (int i = 0; i < tripleCollections.length; i++) {
        tripleCollections[i] = tcManager.getGraph(recipeIDs.get(i));
    }
    UnionGraph unionGraph = new UnionGraph(tripleCollections);
    RuleList matchingRules = new RuleList();
    try {
        SelectQuery query = (SelectQuery) QueryParser.getInstance().parse(sparql);
        ResultSet resultSet = tcManager.executeSparqlQuery(query, unionGraph);
        while (resultSet.hasNext()) {
            SolutionMapping solutionMapping = resultSet.next();
            IRI recipeID = (IRI) solutionMapping.get("recipe");
            IRI ruleID = (IRI) solutionMapping.get("rule");
            Literal description = (Literal) solutionMapping.get("description");
            try {
                Recipe recipe = getRecipe(recipeID);
                Rule rule = new RecipeRule(recipe, getRule(recipe, ruleID));
                if (description != null) {
                    rule.setDescription(description.getLexicalForm());
                }
                matchingRules.add(rule);
            } catch (NoSuchRecipeException e) {
            // in this case go on in the iteration by fetching other matching recipes
            } catch (RecipeConstructionException e) {
            // in this case go on in the iteration by fetching other matching recipes
            } catch (NoSuchRuleInRecipeException e) {
            // in this case go on in the iteration by fetching other matching recipes
            }
        }
    } catch (ParseException e) {
        log.error("The sparql query contains errors: ", e);
    }
    return matchingRules;
}

Example 35 with Literal

use of org.apache.clerezza.commons.rdf.Literal in project stanbol by apache.

the class CeliLemmatizerEnhancementEngineTest method validateMorphoFeatureProperty.

/**
     * [1..*] values of an {@link TypedLiteral} in the form {key=value}
     * @param enhancements The graph with the enhancements
     * @param textAnnotation the TextAnnotation to check
     */
private void validateMorphoFeatureProperty(Graph enhancements, BlankNodeOrIRI textAnnotation) {
    //This taste checks for known morpho features of a given input (constant TERM)
    Iterator<Triple> morphoFeatureIterator = enhancements.filter(textAnnotation, RDF_TYPE, null);
    assertTrue("No POS Morpho Feature value found for TextAnnotation " + textAnnotation + "!", morphoFeatureIterator.hasNext());
    while (morphoFeatureIterator.hasNext()) {
        RDFTerm morphoFeature = morphoFeatureIterator.next().getObject();
        assertTrue("Morpho Feature value are expected of typed literal", morphoFeature instanceof IRI);
        String feature = ((IRI) morphoFeature).getUnicodeString();
        assertFalse("Morpho Feature MUST NOT be empty", feature.isEmpty());
        if (feature.startsWith(OLIA_NAMESPACE)) {
            String key = feature.substring(OLIA_NAMESPACE.length());
            LexicalCategory cat = LexicalCategory.valueOf(key);
            assertTrue("Part of Speech of " + TERM + " should be " + LexicalCategory.Noun, (cat == LexicalCategory.Noun));
        }
    }
    morphoFeatureIterator = enhancements.filter(textAnnotation, CeliMorphoFeatures.HAS_GENDER, null);
    assertTrue("No Gender Morpho Feature value found for TextAnnotation " + textAnnotation + "!", morphoFeatureIterator.hasNext());
    if (morphoFeatureIterator.hasNext()) {
        RDFTerm morphoFeature = morphoFeatureIterator.next().getObject();
        assertTrue("Morpho Feature value are expected of typed literal", morphoFeature instanceof IRI);
        String feature = ((IRI) morphoFeature).getUnicodeString();
        assertFalse("Morpho Feature MUST NOT be empty", feature.isEmpty());
        if (feature.startsWith(OLIA_NAMESPACE)) {
            String key = feature.substring(OLIA_NAMESPACE.length());
            Gender cat = Gender.valueOf(key);
            assertTrue("Gender of " + TERM + " should be " + Gender.Feminine, (cat == Gender.Feminine));
        }
    }
    morphoFeatureIterator = enhancements.filter(textAnnotation, CeliMorphoFeatures.HAS_NUMBER, null);
    assertTrue("No Number Morpho Feature value found for TextAnnotation " + textAnnotation + "!", morphoFeatureIterator.hasNext());
    if (morphoFeatureIterator.hasNext()) {
        RDFTerm morphoFeature = morphoFeatureIterator.next().getObject();
        assertTrue("Morpho Feature value are expected of typed literal", morphoFeature instanceof IRI);
        String feature = ((IRI) morphoFeature).getUnicodeString();
        assertFalse("Morpho Feature MUST NOT be empty", feature.isEmpty());
        if (feature.startsWith(OLIA_NAMESPACE)) {
            String key = feature.substring(OLIA_NAMESPACE.length());
            NumberFeature cat = NumberFeature.valueOf(key);
            assertTrue("Number of " + TERM + " should be " + Gender.Feminine, (cat == NumberFeature.Singular));
        }
    }
    morphoFeatureIterator = enhancements.filter(textAnnotation, CeliLemmatizerEnhancementEngine.hasLemmaForm, null);
    assertTrue("No Number Morpho Feature value found for TextAnnotation " + textAnnotation + "!", morphoFeatureIterator.hasNext());
    if (morphoFeatureIterator.hasNext()) {
        RDFTerm morphoFeature = morphoFeatureIterator.next().getObject();
        assertTrue("Lemma Forms value are expected of type Literal", morphoFeature instanceof Literal);
        assertFalse("Lemma forms MUST NOT be empty", ((Literal) morphoFeature).getLexicalForm().isEmpty());
        String feature = ((Literal) morphoFeature).getLexicalForm();
        assertTrue("Lemma of " + TERM + " should be " + TERM, (feature.equals(TERM)));
    }
}