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https://issues.apache.org/jira/browse/COMMONSRDF-35?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15543908#comment-15543908
]
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_r81665489
--- Diff:
rdf4j/src/main/java/org/apache/commons/rdf/rdf4j/impl/BlankNodeImpl.java ---
@@ -0,0 +1,93 @@
+/**
+ * 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.nio.charset.StandardCharsets;
+import java.util.UUID;
+
+import org.apache.commons.rdf.api.BlankNode;
+import org.apache.commons.rdf.rdf4j.RDF4JBlankNode;
+import org.eclipse.rdf4j.model.BNode;
+import org.eclipse.rdf4j.rio.turtle.TurtleUtil;
+
+public final class BlankNodeImpl extends AbstractRDFTerm<BNode>
+ implements RDF4JBlankNode {
+
+ private transient int hashCode = 0;
+ private long saltUUIDleast;
+ private long saltUUIDmost;
+
+ public BlankNodeImpl(BNode bNode, UUID salt) {
+ super(bNode);
+ // Space-efficient storage of salt UUID
+ saltUUIDmost = salt.getMostSignificantBits();
+ saltUUIDleast = salt.getLeastSignificantBits();
+ }
+
+ public boolean equals(Object obj) {
+ if (obj == this) {
+ return true;
+ }
+ // NOTE: Do NOT use Bnode.equals() as it has a more generous
+ // equality based only on the value.getID();
+ if (obj instanceof BlankNode) {
+ BlankNode blankNode = (BlankNode) obj;
+ return
uniqueReference().equals(blankNode.uniqueReference());
+ }
+ return false;
+ }
+
+ @Override
+ public int hashCode() {
+ if (hashCode != 0) {
+ return hashCode;
+ }
+ return hashCode = uniqueReference().hashCode();
+ }
+
+ private boolean isValidBlankNodeLabel(String id) {
+ // FIXME: Replace with a regular expression?
+ if (id.isEmpty()) {
+ return false;
+ }
+ if (!
TurtleUtil.isBLANK_NODE_LABEL_StartChar(id.codePointAt(0))) {
--- End diff --
All of the Rio parser modules other than the main package in the rio-api
module are effectively implementations, even though their package names don't
indicate as much. Accessing RDFParser and RDFWriter implementations is best
done indirectly using ServiceLoader, via the "Rio.getParser..." methods.
However, actually putting those packages down on paper as officially not part
of the public API is a task that I brought up before the initial RDF4J releases
but was postponed. Hence, classes like TurtleUtil are still presumed to be fair
game for reuse at this point.
> 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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