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https://issues.apache.org/jira/browse/COMMONSRDF-35?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15543913#comment-15543913
]
ASF GitHub Bot commented on COMMONSRDF-35:
------------------------------------------
Github user ansell commented on a diff in the pull request:
https://github.com/apache/incubator-commonsrdf/pull/24#discussion_r81667445
--- Diff:
rdf4j/src/main/java/org/apache/commons/rdf/rdf4j/impl/RepositoryGraphImpl.java
---
@@ -0,0 +1,172 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.rdf.rdf4j.impl;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Objects;
+import java.util.Set;
+import java.util.stream.Stream;
+
+import org.apache.commons.rdf.api.BlankNodeOrIRI;
+import org.apache.commons.rdf.api.Graph;
+import org.apache.commons.rdf.api.IRI;
+import org.apache.commons.rdf.api.RDFTerm;
+import org.apache.commons.rdf.api.Triple;
+import org.apache.commons.rdf.rdf4j.RDF4JBlankNodeOrIRI;
+import org.apache.commons.rdf.rdf4j.RDF4JGraph;
+import org.apache.commons.rdf.rdf4j.RDF4JTriple;
+import org.eclipse.rdf4j.common.iteration.Iterations;
+import org.eclipse.rdf4j.model.Resource;
+import org.eclipse.rdf4j.model.Statement;
+import org.eclipse.rdf4j.model.Value;
+import org.eclipse.rdf4j.repository.Repository;
+import org.eclipse.rdf4j.repository.RepositoryConnection;
+import org.eclipse.rdf4j.repository.RepositoryResult;
+
+public class RepositoryGraphImpl extends
AbstractRepositoryGraphLike<Triple> implements Graph, RDF4JGraph {
+
+ private final Resource[] contextMask;
+
+ public RepositoryGraphImpl(Repository repository, boolean
handleInitAndShutdown, boolean includeInferred, boolean unionGraph) {
+ super(repository, handleInitAndShutdown, includeInferred);
+ if (unionGraph) {
+ // no context mask, aka any context
+ this.contextMask = new Resource[] { };
+ } else {
+ // default context: null
+ this.contextMask = new Resource[] { null };
+ }
+ }
+
+ public RepositoryGraphImpl(Repository repository, boolean
handleInitAndShutdown, boolean includeInferred, Resource... contextMask) {
+ super(repository, handleInitAndShutdown, includeInferred);
+ this.contextMask = Objects.requireNonNull(contextMask);
+ }
+
+
+ @Override
+ public void add(Triple tripleLike) {
+ Statement statement = rdf4jTermFactory.asStatement(tripleLike);
+ try (RepositoryConnection conn = getRepositoryConnection()) {
+ conn.add(statement, contextMask);
+ conn.commit();
+ }
+ }
+
+
+ @Override
+ public boolean contains(Triple tripleLike) {
+ Statement statement = rdf4jTermFactory.asStatement(tripleLike);
+ try (RepositoryConnection conn = getRepositoryConnection()) {
+ return conn.hasStatement(statement, includeInferred,
contextMask);
+ }
+ }
+
+ @Override
+ public void remove(Triple tripleLike) {
+ Statement statement = rdf4jTermFactory.asStatement(tripleLike);
+ try (RepositoryConnection conn = getRepositoryConnection()) {
+ conn.remove(statement, contextMask);
+ conn.commit();
+ }
+ }
+
+ @Override
+ public void clear() {
+ try (RepositoryConnection conn = getRepositoryConnection()) {
+ conn.clear(contextMask);
+ conn.commit();
+ }
+ }
+
+ @Override
+ public long size() {
+ try (RepositoryConnection conn = getRepositoryConnection()) {
+ if (! includeInferred && contextMask.length == 0) {
+ return conn.size();
+ } else {
+ return stream().count();
+ }
+ }
+ }
+
+
+ @Override
+ public void add(BlankNodeOrIRI subject, IRI predicate, RDFTerm object) {
+ Resource subj = (Resource) rdf4jTermFactory.asValue(subject);
+ org.eclipse.rdf4j.model.IRI pred =
(org.eclipse.rdf4j.model.IRI) rdf4jTermFactory.asValue(predicate);
+ Value obj = rdf4jTermFactory.asValue(object);
+ try (RepositoryConnection conn = getRepositoryConnection()) {
+ conn.add(subj, pred, obj, contextMask);
+ conn.commit();
+ }
+ }
+
+ @Override
+ public boolean contains(BlankNodeOrIRI subject, IRI predicate, RDFTerm
object) {
+ Resource subj = (Resource) rdf4jTermFactory.asValue(subject);
+ org.eclipse.rdf4j.model.IRI pred =
(org.eclipse.rdf4j.model.IRI) rdf4jTermFactory.asValue(predicate);
+ Value obj = rdf4jTermFactory.asValue(object);
+ try (RepositoryConnection conn = getRepositoryConnection()) {
+ return conn.hasStatement(subj, pred, obj,
includeInferred, contextMask);
+ }
+ }
+
+ @Override
+ public void remove(BlankNodeOrIRI subject, IRI predicate, RDFTerm
object) {
+ Resource subj = (Resource) rdf4jTermFactory.asValue(subject);
+ org.eclipse.rdf4j.model.IRI pred =
(org.eclipse.rdf4j.model.IRI) rdf4jTermFactory.asValue(predicate);
+ Value obj = rdf4jTermFactory.asValue(object);
+ try (RepositoryConnection conn = getRepositoryConnection()) {
+ conn.remove(subj, pred, obj, contextMask);
+ conn.commit();
+ }
+ }
+
+ @Override
+ public Stream<RDF4JTriple> stream() {
+ return stream(null, null, null);
+ }
+
+ @Override
+ public Stream<RDF4JTriple> stream(BlankNodeOrIRI subject, IRI
predicate, RDFTerm object) {
+ Resource subj = (Resource) rdf4jTermFactory.asValue(subject);
+ org.eclipse.rdf4j.model.IRI pred =
(org.eclipse.rdf4j.model.IRI) rdf4jTermFactory.asValue(predicate);
+ Value obj = rdf4jTermFactory.asValue(object);
+ RepositoryConnection conn = getRepositoryConnection();
+ // FIXME: Is it OK that we don't close the connection?
+ RepositoryResult<Statement> statements =
conn.getStatements(subj, pred, obj, includeInferred, contextMask);
+ return Iterations.stream(statements).map(this::asTripleLike);
+ }
+
+ @Override
+ protected RDF4JTriple asTripleLike(Statement statement) {
+ return rdf4jTermFactory.asTriple(statement);
+ }
+
+ @Override
+ public Set<RDF4JBlankNodeOrIRI<Resource>> getContextMask() {
+ Set<RDF4JBlankNodeOrIRI<Resource>> mask = new HashSet<>();
--- End diff --
Not sure how often this method will be used, but this set should not become
very large in any normal situations, compared to the rest of the data, so this
could be prederived in the constructor and stored in an instance variable next
to contextMask.
> rdf4j integration
> -----------------
>
> Key: COMMONSRDF-35
> URL: https://issues.apache.org/jira/browse/COMMONSRDF-35
> Project: Apache Commons RDF
> Issue Type: New Feature
> Reporter: Stian Soiland-Reyes
> Assignee: Stian Soiland-Reyes
> Labels: integration, rdf4j, sesame
> Fix For: 0.3.0
>
>
> Add a new rdf4j module with implementation for Eclipse rdf4j
> See https://github.com/apache/incubator-commonsrdf/tree/rdf4j/rdf4j
> A legacy sesame branch could then be added by mainly copy/paste and change
> the import
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