Examples with PrefixMappingImpl org.apache.jena.shared.impl.PrefixMappingImpl used on opensource projects

Example 36 with PrefixMappingImpl

use of org.apache.jena.shared.impl.PrefixMappingImpl in project jena by apache.

the class TestPrefixMappingUtils method prefixesTTL2.

@Test
public void prefixesTTL2() {
    // Some prefixes used
    String data2 = StrUtils.strjoinNL("@prefix : <http://example/> .", "@prefix ex: <http://example/ex#> .", "@prefix notinuse: <http://example/whatever/> .", "", ":s1 :p :x1 .", ":s1 ex:p :x1 .");
    Graph graph1 = create(data2);
    PrefixMapping pmap = PrefixMappingUtils.calcInUsePrefixMappingTTL(graph1);
    PrefixMapping pmapExpected = new PrefixMappingImpl();
    pmapExpected.setNsPrefix("", "http://example/");
    pmapExpected.setNsPrefix("ex", "http://example/ex#");
    Assert.assertEquals(2, size(pmap));
    Assert.assertTrue(sameMapping(pmapExpected, pmap));
    Assert.assertTrue(pmap.getNsPrefixURI("notinuse") == null);
}

Example 37 with PrefixMappingImpl

use of org.apache.jena.shared.impl.PrefixMappingImpl in project jena by apache.

the class PrefixMappingUtils method calcInUsePrefixMappingTTL.

/**
 * Analyse the graph to see which prefixes of the given {@link PrefixMapping} are used
 * by the graph triples.
 * <p>
 * This function attempts to process each URI in the graph as if it were to be printed
 * in Turtle. Only prefixes that lead to valid output strings are returned. This is
 * more expensive than {@link #calcInUsePrefixMapping(Graph, PrefixMapping)}.
 * <p>
 * This function does not calculate new prefixes.
 *
 * @see #calcInUsePrefixMapping(Graph, PrefixMapping)
 */
public static PrefixMapping calcInUsePrefixMappingTTL(Graph graph, PrefixMapping prefixMapping) {
    /* Method:
         *
         * For each URI, split in in the usual place, after "/" or "#" for http URIs, and
         * after the last ":" for URNs, then see if that is a declared prefix.
         *
         * Exit early if every prefix is accounted for.
         */
    // Map prefix -> URI.
    Map<String, String> pmap = prefixMapping.getNsPrefixMap();
    // All URIs used as prefixes in the prefix mapping.
    Set<String> prefixURIs = new HashSet<>(pmap.values());
    // Prefixes used.
    Set<String> inUse = new HashSet<>();
    Iterator<Triple> iter = graph.find(null, null, null);
    while (iter.hasNext()) {
        Triple triple = iter.next();
        processTTL(triple, inUse, prefixMapping);
        if (inUse.size() == prefixURIs.size())
            // Fast exit.
            break;
    }
    if (pmap.size() == inUse.size())
        return prefixMapping;
    // Build result.
    PrefixMapping pmap2 = new PrefixMappingImpl();
    inUse.forEach((prefix) -> pmap2.setNsPrefix(prefix, prefixMapping.getNsPrefixURI(prefix)));
    return pmap2;
}

Example 38 with PrefixMappingImpl

use of org.apache.jena.shared.impl.PrefixMappingImpl in project jena by apache.

the class PrefixMappingUtils method calcInUsePrefixMapping.

/**
 * Analyse the graph to see which prefixes of the given {@link PrefixMapping} are in
 * use.
 * <p>
 * In the case of overlapping prefixes (where one prefix declaration is has an initial
 * URI string which matches another prefix declaration), all are included, though
 * they may not be used when printing (that depends on the output process). In effect,
 * this process has "false positives".
 * <p>
 * This function does not calculate new prefixes.
 *
 * @see #calcInUsePrefixMappingTTL(Graph, PrefixMapping)
 */
public static PrefixMapping calcInUsePrefixMapping(Graph graph, PrefixMapping prefixMapping) {
    /* Method:
         *
         * For each URI in the data, look it up in the trie.
         * to see if has a declared prefix.
         *
         * Exit early if every prefix is accounted for.
         */
    // Map prefix to URI.
    Map<String, String> pmap = prefixMapping.getNsPrefixMap();
    // Map URI to prefix, with partial lookup (all uri keys that partly match the URI)
    Trie<String> trie = new Trie<>();
    // Change this to "add(uri, uri)" to calculate the uris.
    pmap.forEach((prefix, uri) -> trie.add(uri, prefix));
    // Prefixes in use.
    // (URIs if "add(uri, uri)")
    Set<String> inUse = new HashSet<>();
    ExtendedIterator<Triple> iter = graph.find(null, null, null);
    try {
        while (iter.hasNext()) {
            Triple triple = iter.next();
            process(triple, inUse, trie);
            if (pmap.size() == inUse.size())
                break;
        }
    } finally {
        iter.close();
    }
    if (pmap.size() == inUse.size())
        return prefixMapping;
    // Build result.
    PrefixMapping pmap2 = new PrefixMappingImpl();
    inUse.forEach((prefix) -> pmap2.setNsPrefix(prefix, prefixMapping.getNsPrefixURI(prefix)));
    return pmap2;
}

Example 39 with PrefixMappingImpl

use of org.apache.jena.shared.impl.PrefixMappingImpl in project webofneeds by researchstudio-sat.

the class WonLinkedDataUtils method findWonNode.

public static Optional<WonNodeInfo> findWonNode(URI someURI, Optional<URI> requesterWebID, LinkedDataSource linkedDataSource) {
    assert linkedDataSource != null : "linkedDataSource must not be null";
    int depth = 5;
    int maxRequests = 1000;
    List<Path> propertyPaths = new ArrayList<>();
    PrefixMapping pmap = new PrefixMappingImpl();
    pmap.withDefaultMappings(PrefixMapping.Standard);
    pmap.setNsPrefix("won", WON.getURI());
    pmap.setNsPrefix("msg", WONMSG.getURI());
    pmap.setNsPrefix("rdfs", RDFS.getURI());
    propertyPaths.add(PathParser.parse("^rdfs:member / ^won:messageContainer / ^won:wonNode", pmap));
    propertyPaths.add(PathParser.parse("^won:messageContainer / ^won:wonNode", pmap));
    propertyPaths.add(PathParser.parse("^won:wonNode", pmap));
    propertyPaths.add(PathParser.parse("rdfs:member / ^won:wonNode", pmap));
    Dataset ds = linkedDataSource.getDataForResourceWithPropertyPath(someURI, requesterWebID, propertyPaths, maxRequests, depth);
    WonNodeInfo info = WonRdfUtils.WonNodeUtils.getWonNodeInfo(ds);
    return Optional.ofNullable(info);
}