Java SSE类代码示例

import org.apache.jena.sparql.sse.SSE; //导入依赖的package包/类
@Test public void changeSuppressEmptyCommit_4() {
    Quad q = SSE.parseQuad("(_ :s :p 'object')");
    Triple t = SSE.parseTriple("(:t :p 'object')");
    
    Txn.executeRead(dsg,   ()->{});
    testCounters(counter.summary(), 0, 0);
    
    Txn.executeWrite(dsg,  ()->{dsg.add(q);});
    testCounters(counter.summary(), 1, 0);

    Txn.executeWrite(dsg,  ()->{dsg.getDefaultGraph().add(t);});
    testCounters(counter.summary(), 2, 0);
    
    Txn.executeWrite(dsg,  ()->{dsg.getDefaultGraph().getPrefixMapping().setNsPrefix("", "http://example/");});
    testCounters(counter.summary(), 2, 1);
    
    Txn.executeWrite(dsg,  ()->{});
    testCounters(counter.summary(), 2, 1);
}
 

import org.apache.jena.sparql.sse.SSE; //导入依赖的package包/类
@Test
public void change_1() {
    String NAME = "change_1s";
    DeltaClient dClient = createRegister(NAME);
    
    try(DeltaConnection dConn = dClient.get(NAME)) {
        long verLocal0 = dConn.getLocalVersion();
        long verRemotel0 = dConn.getRemoteVersionLatest();
        
        DatasetGraph dsg = dConn.getDatasetGraph();
        Txn.executeWrite(dsg, ()->{
            dsg.add(SSE.parseQuad("(:gx :sx :px :ox)"));
        });
        
        long verLocal1 = dConn.getLocalVersion();
        long verRemotel1 = dConn.getRemoteVersionLatest();
        assertEquals(verLocal1, dConn.getLocalVersion());
        assertEquals(verRemotel1, dConn.getRemoteVersionLatest());
        
        assertFalse(dConn.getDatasetGraph().isEmpty());
        if ( dConn.getStorage() != null )
            assertFalse(dConn.getStorage().isEmpty());
    }
}
 

import org.apache.jena.sparql.sse.SSE; //导入依赖的package包/类
@Test
public void change_2() {
    String NAME = "change_2";
    DeltaClient dClient = createRegister(NAME);
    try(DeltaConnection dConn = dClient.get(NAME)) {
        Id dsRef = dConn.getDataSourceId();
        long version = dConn.getRemoteVersionLatest();

        DatasetGraph dsg = dConn.getDatasetGraph();
        Txn.executeWrite(dsg, ()->{
            Quad q = SSE.parseQuad("(_ :s1 :p1 :o1)");
            dsg.add(q);
        });
        // Rebuild directly.
        DatasetGraph dsg2 = DatasetGraphFactory.createTxnMem();
        long ver = dConn.getRemoteVersionLatest();
        RDFPatch patch1 = dConn.getLink().fetch(dsRef, ver) ;
        RDFPatchOps.applyChange(dsg2, patch1);

        Set<Quad> set1 = Txn.calculateRead(dsg, ()->Iter.toSet(dsg.find()));
        Set<Quad> set2 = Txn.calculateRead(dsg2, ()->Iter.toSet(dsg2.find()));
        assertEquals(set1, set2);
    }
}
 

import org.apache.jena.sparql.sse.SSE; //导入依赖的package包/类
@Test
public void update_3() {
    // Create on the Delta link then setup DeltaClient
    DeltaLink dLink = getLink();
    String DS_NAME = "12345";
    
    Id dsRef = dLink.newDataSource(DS_NAME, "http://example/datasource_update_3");
    DeltaClient dClient = createDeltaClient();
    dClient.register(dsRef, LocalStorageType.MEM, TxnSyncPolicy.NONE);
    DeltaConnection dConn = dClient.get(DS_NAME);
    Quad quad = SSE.parseQuad("(_ :s :p :o)");
    DatasetGraph dsg = dConn.getDatasetGraph();

    long x0 = Txn.calculateRead(dsg, ()->Iter.count(dsg.find()) );
    assertEquals(0, x0);
    
    dsg.begin(ReadWrite.WRITE);
    dsg.add(quad);
    dsg.abort();
    
    long x1 = Txn.calculateRead(dsg, ()->Iter.count(dsg.find()) );
    assertEquals(0, x1);
}
 

import org.apache.jena.sparql.sse.SSE; //导入依赖的package包/类
@Override
public QueryIterator execEvaluated(Binding binding, Node subject, Node predicate, Node object, ExecutionContext execCxt) {
    Table table = getTable(predicate) ;
    if ( table == null ) {
        Log.warn(this,  "No table for "+SSE.str(predicate));
        return IterLib.noResults(execCxt) ;
    }
    
    if ( subject.isVariable() ) {
        if ( object.isVariable() )
            return execVarVar(binding, table, subject, object, execCxt) ;
        else
            return execVarTerm(binding, table, subject, object, execCxt) ;
    } else {
        if ( object.isVariable() )
            return execTermVar(binding, table, subject, object, execCxt) ;
        else
            return execTermTerm(binding, table, subject, object, execCxt) ;
    }
}
 

import org.apache.jena.sparql.sse.SSE; //导入依赖的package包/类
/** Evaluate to match a pattern */
public static void eval(Triple query, Graph source, RuleSet rules) {
    List<Triple> heads = rules.getHeads();  

    Triple triple = query ;
    System.out.println() ;
    System.out.println("Query: "+SSE.str(triple)) ;
    
    List<Triple> answers = new ArrayList<>() ;
    
    
    // Find rules.
    List<Rule> matches = rules.stream().filter((r) -> matchHead(triple, r)).collect(toList()) ;
    System.out.println() ;
    if ( matches.isEmpty() )
        System.out.println("<empty>") ; 
    else
        System.out.println(Rule.str(matches)) ;
    
    matches.forEach((m)-> { 
        if ( checkForRecursion1(m, rules) )
            System.out.println("R: "+m);
    }) ;
}
 

import org.apache.jena.sparql.sse.SSE; //导入依赖的package包/类
static void compare(String label, Graph testGraph, Graph refGraph, Node s, Node p , Node o) {
    if ( label != null )
        System.out.println("** Compare ("+label+"):") ;
    else
        System.out.println("** Compare") ;
    System.out.printf("find(%s, %s, %s)\n", str(s), str(p), str(o)) ;
    List<Triple> x1 = testGraph.find(s, p, o).toList() ;
    List<Triple> x2 = refGraph.find(s, p, o).toList() ;
    if ( true )
        x2 = InfGlobal.removeRDFS(x2) ;
    
    boolean b = sameElts(x1, x2) ;
    if ( !b ) {
        System.out.println("  Different:") ;
        x1.stream().map(SSE::str).forEach(t -> System.out.println("Test:  "+t)) ;
        x2.stream().map(SSE::str).forEach(t -> System.out.println("Ref :  "+t)) ;
    } else {
        System.out.println("  Same:") ;
        x1.stream().map(SSE::str).forEach(t -> System.out.println("    "+t)) ;
    }
        
    System.out.println() ;
}
 

import org.apache.jena.sparql.sse.SSE; //导入依赖的package包/类
public static void main(String[] args) {
    
    // Example aggregate that counts literals.
    // Returns unbound for no rows. 
    String aggUri = "http://example/countLiterals" ;
    
    
    /* Registration */
    AggregateRegistry.register(aggUri, myAccumulatorFactory, NodeConst.nodeMinusOne);
    
    
    // Some data.
    Graph g = SSE.parseGraph("(graph (:s :p :o) (:s :p 1))") ;
    String qs = "SELECT (<http://example/countLiterals>(?o) AS ?x) {?s ?p ?o}" ;
    
    // Execution as normal.
    Query q = QueryFactory.create(qs) ;
    try ( QueryExecution qexec = QueryExecutionFactory.create(q, ModelFactory.createModelForGraph(g)) ) {
        ResultSet rs = qexec.execSelect() ;
        ResultSetFormatter.out(rs);
    }
}
 

import org.apache.jena.sparql.sse.SSE; //导入依赖的package包/类
public static void main(String []args)
{
    // Create an empty GraphStore (has an empty default graph and no named graphs) 
    Dataset dataset = DatasetFactory.createTxnMem() ;
    
    // ---- Read and update script in one step.
    UpdateAction.readExecute("update.ru", dataset) ;
    
    // ---- Reset.
    UpdateAction.parseExecute("DROP ALL", dataset) ;
    
    // ---- Read the update script, then execute, in separate two steps
    UpdateRequest request = UpdateFactory.read("update.ru") ;
    UpdateAction.execute(request, dataset) ;

    // Write in debug format.
    System.out.println("# Debug format");
    SSE.write(dataset) ;
    
    System.out.println();
    
    System.out.println("# N-Quads: S P O G") ;
    RDFDataMgr.write(System.out, dataset, Lang.NQUADS) ;
}
 

import org.apache.jena.sparql.sse.SSE; //导入依赖的package包/类
public static void ex3(Dataset dataset)
{
    // Build up the request then execute it.
    // This is the preferred way for complex sequences of operations. 
    UpdateRequest request = UpdateFactory.create() ;
    request.add("DROP ALL")
           .add("CREATE GRAPH <http://example/g2>") ;
    // Different style.
    // Equivalent to request.add("...")
    UpdateFactory.parse(request, "LOAD <file:etc/update-data.ttl> INTO GRAPH <http://example/g2>") ;
    
    // And perform the operations.
    UpdateAction.execute(request, dataset) ;
    
    System.out.println("# Debug format");
    SSE.write(dataset) ;
    
    System.out.println();
    
    System.out.println("# N-Quads: S P O G") ;
    RDFDataMgr.write(System.out, dataset, Lang.NQUADS) ;
}
 

import org.apache.jena.sparql.sse.SSE; //导入依赖的package包/类
public static void main(String []args)
{
    Dataset dataset = DatasetFactory.createTxnMem() ;
    
    UpdateRequest request = UpdateFactory.create() ;
    
    request.add(new UpdateDrop(Target.ALL)) ;
    request.add(new UpdateCreate("http://example/g2")) ;
    request.add(new UpdateLoad("file:etc/update-data.ttl", "http://example/g2")) ;
    UpdateAction.execute(request, dataset) ;
    
    System.out.println("# Debug format");
    SSE.write(dataset) ;
    
    System.out.println();
    
    System.out.println("# N-Quads: S P O G") ;
    RDFDataMgr.write(System.out, dataset, Lang.NQUADS) ;
}
 

import org.apache.jena.sparql.sse.SSE; //导入依赖的package包/类
@Test
public void update_1() {
    // Create on the Delta link then setup DeltaClient
    DeltaLink dLink = getLink();
    String DS_NAME = "123";
    
    Id dsRef = dLink.newDataSource(DS_NAME, "http://example/datasource_update_1");
    DeltaClient dClient = createDeltaClient();
    dClient.register(dsRef, LocalStorageType.MEM, TxnSyncPolicy.NONE);
    DeltaConnection dConn = dClient.get(DS_NAME);
    assertNotNull(dConn);
    assertEquals(0, dConn.getLocalVersion());
    assertEquals(0, dConn.getRemoteVersionLatest());
    
    Quad quad = SSE.parseQuad("(_ :s :p :o)");
    DatasetGraph dsg = dConn.getDatasetGraph();
    long x0 = Iter.count(dsg.find());
    assertEquals(0, x0);
    dsg.add(quad);
    
    long x1 = Iter.count(dsg.find());
    assertEquals(1, x1);
    
    long x2 = Iter.count(dConn.getStorage().find());
    assertEquals(1, x1);

}
 

import org.apache.jena.sparql.sse.SSE; //导入依赖的package包/类
@Test
public void update_2() {
    // Create on the Delta link then setup DeltaClient
    DeltaLink dLink = getLink();
    String DS_NAME = "1234";
    
    Id dsRef = dLink.newDataSource(DS_NAME, "http://example/datasource_update_2");
    DeltaClient dClient = createDeltaClient();
    dClient.register(dsRef, LocalStorageType.MEM, TxnSyncPolicy.NONE);
    DeltaConnection dConn = dClient.get(DS_NAME);
    assertNotNull(dConn);
    assertEquals(0, dConn.getLocalVersion());
    assertEquals(0, dConn.getRemoteVersionLatest());
    
    Quad quad = SSE.parseQuad("(_ :s :p :o)");
    DatasetGraph dsg = dConn.getDatasetGraph();

    long x0 = Txn.calculateRead(dsg, ()->Iter.count(dsg.find()) );
    assertEquals(0, x0);
    
    Txn.executeWrite(dsg, ()->dsg.add(quad));
    long x1 = Txn.calculateRead(dsg, ()->Iter.count(dsg.find()) );
    assertEquals(1, x1);
    
    long x2 = Iter.count(dConn.getStorage().find());
    assertEquals(1, x1);
}
 

import org.apache.jena.sparql.sse.SSE; //导入依赖的package包/类
@Test public void zone_03() {
    assertTrue(zone.localConnections().isEmpty());
    DatasetGraph dsgBase = DatasetGraphFactory.createTxnMem();
    String NAME = "ABC"; 
    Id dsRef = createExternal(NAME, dsgBase);
    assertFalse(zone.localConnections().isEmpty());
    Quad quad = SSE.parseQuad("(_ :s :p :o)");
    try(DeltaConnection dConn = deltaClient.get(dsRef)) {
        DatasetGraph dsg  = dConn.getDatasetGraph();
        Txn.executeWrite(dsg, ()->dsg.add(quad)); 
    }
    // read log.
    PatchLogInfo info = deltaLink.getPatchLogInfo(dsRef);
    assertEquals(1, info.getMaxVersion());
}
 

import org.apache.jena.sparql.sse.SSE; //导入依赖的package包/类
public static void main(String...argv) {
    JenaSystem.init();
    Table table = new PFbyTable.Table() ;
    
    add(table, ":s1", ":o1") ;
    add(table, ":s1", ":o2") ;
    add(table, ":s2", ":o1") ;
    add(table, ":s2", ":o2") ;
    add(table, ":s2", ":o3") ;
    
    Dataset ds = DatasetFactory.create() ;
    
    PropertyFunctionFactory pff = (uri)->new PFbyTable() ;
    // rdf:rest is special to property functions!  
    String iri = "http://example/trans" ;
    PFbyTable.addTable(NodeFactory.createURI(iri), table);
    PropertyFunctionRegistry.get().put(iri, pff) ;
    
    String x = StrUtils.strjoinNL
        ("PREFIX : <http://example/>"
        ,"PREFIX rdf: <"+RDF.getURI()+">"
        ,"PREFIX rdfs: <"+RDFS.getURI()+">"
        //,"SELECT * { ?s ?p ?o . ?s rdfs:member :o1 . ?s rdf:rest :o1 }"
        //,"SELECT * { ?s rdfs:member :o1 }"
        ,"SELECT * { { ?s :trans :o1 } UNION { :s2 :trans ?o }  UNION { ?X :trans ?Y } }"
        ) ;
    Query query = QueryFactory.create(x) ;
    System.out.println(query); 
    
    Op op = Algebra.compile(query) ;
    Op op1 = Algebra.optimize(op) ;
    System.out.println(op1);
    SSE.write(op1); 
    
    QueryExecution qExec = QueryExecutionFactory.create(query, ds) ;
    QueryExecUtils.executeQuery(qExec);
}