Use Jena's notion of graph containment instead of our strict equality

fcrepo · Oct 17, 2014 · 2ade9b8 · ajs6f · Oct 17, 2014 · ajs6f
1 parent 16eac6b
commit 2ade9b8
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Showing 7 changed files with 80 additions and 154 deletions.
diff --git a/fcrepo-kernel-impl/src/main/java/org/fcrepo/kernel/impl/FedoraResourceImpl.java b/fcrepo-kernel-impl/src/main/java/org/fcrepo/kernel/impl/FedoraResourceImpl.java
@@ -16,7 +16,6 @@
 package org.fcrepo.kernel.impl;
 
 import static com.google.common.base.Throwables.propagate;
-import static com.google.common.collect.ImmutableSet.copyOf;
 import static com.google.common.collect.Iterators.singletonIterator;
 import static com.google.common.collect.Lists.newArrayList;
 import static com.hp.hpl.jena.update.UpdateAction.execute;
@@ -35,7 +34,6 @@
 import java.util.Date;
 import java.util.Iterator;
 import java.util.List;
-import java.util.Set;
 
 
 import javax.jcr.ItemNotFoundException;
@@ -58,7 +56,7 @@
 import org.fcrepo.kernel.exception.RepositoryRuntimeException;
 import org.fcrepo.kernel.identifiers.IdentifierConverter;
 import org.fcrepo.kernel.impl.utils.JcrPropertyStatementListener;
-import org.fcrepo.kernel.utils.iterators.DifferencingIterator;
+import org.fcrepo.kernel.utils.iterators.GraphDifferencingIterator;
 import org.fcrepo.kernel.impl.utils.iterators.RdfAdder;
 import org.fcrepo.kernel.impl.utils.iterators.RdfRemover;
 import org.fcrepo.kernel.utils.iterators.NodeIterator;
@@ -67,9 +65,7 @@
 import org.modeshape.jcr.api.JcrTools;
 import org.slf4j.Logger;
 
-import com.google.common.collect.Iterables;
 import com.google.common.collect.Iterators;
-import com.hp.hpl.jena.graph.Triple;
 import com.hp.hpl.jena.rdf.model.Model;
 import com.hp.hpl.jena.update.UpdateRequest;
 
@@ -417,28 +413,23 @@ public Boolean isNew() {
      *     (org.fcrepo.kernel.identifiers.IdentifierConverter, com.hp.hpl.jena.rdf.model.Model)
      */
     @Override
-    public RdfStream replaceProperties(final IdentifierConverter<Resource, FedoraResource> graphSubjects,
+    public void replaceProperties(final IdentifierConverter<Resource, FedoraResource> graphSubjects,
         final Model inputModel, final RdfStream originalTriples) {
 
-        final RdfStream replacementStream = RdfStream.fromModel(inputModel);
+        final RdfStream replacementStream = new RdfStream().namespaces(inputModel.getNsPrefixMap());
 
-        final Set<Triple> replacementTriples = copyOf(replacementStream);
-
-        final DifferencingIterator<Triple> differencer =
-            new DifferencingIterator<>(replacementTriples, originalTriples);
+        final GraphDifferencingIterator differencer =
+            new GraphDifferencingIterator(inputModel, originalTriples);
 
         try {
             new RdfRemover(graphSubjects, getSession(), replacementStream
                     .withThisContext(differencer)).consume();
 
             new RdfAdder(graphSubjects, getSession(), replacementStream
-                    .withThisContext(differencer.notCommon())).consume();
+                    .withThisContext(differencer.notCommon().find(null, null, null))).consume();
         } catch (final RepositoryException e) {
             throw new RepositoryRuntimeException(e);
         }
-
-        return replacementStream.withThisContext(Iterables.concat(differencer
-                .common(), differencer.notCommon()));
     }
 
     /* (non-Javadoc)

diff --git a/...po-kernel-impl/src/test/java/org/fcrepo/integration/kernel/impl/FedoraResourceImplIT.java b/...po-kernel-impl/src/test/java/org/fcrepo/integration/kernel/impl/FedoraResourceImplIT.java
@@ -565,6 +565,25 @@ public boolean apply(final javax.jcr.Property property) {
 
     }
 
+    @Test
+    public void testReplacePropertyWithSemanticEquivalent() throws RepositoryException {
+        final String pid = UUID.randomUUID().toString();
+        final FedoraObject object = objectService.findOrCreateObject(session, pid);
+        object.getNode().setProperty("dc:title", "xyz");
+        session.save();
+
+        final RdfStream triples = object.getTriples(subjects, PropertiesRdfContext.class);
+        final Model model = triples.asModel();
+
+        final Resource subject = subjects.reverse().convert(object);
+        final Property predicate = model.createProperty("http://purl.org/dc/elements/1.1/title");
+
+        model.removeAll(subject, predicate, null);
+
+        model.add(subject, predicate, createPlainLiteral("xyz"));
+
+        object.replaceProperties(subjects, model, object.getTriples(subjects, PropertiesRdfContext.class));
+    }
 
     @Test
     public void testDeleteObject() throws RepositoryException {

diff --git a/fcrepo-kernel-impl/src/test/java/org/fcrepo/kernel/impl/FedoraResourceImplTest.java b/fcrepo-kernel-impl/src/test/java/org/fcrepo/kernel/impl/FedoraResourceImplTest.java
@@ -312,11 +312,10 @@ public void testReplacePropertiesDataset() throws Exception {
                                 replacementModel.createProperty("j"),
                                "k");
 
-        final Model replacements = testObj.replaceProperties(defaultGraphSubjects,
+        testObj.replaceProperties(defaultGraphSubjects,
                 replacementModel,
-                propertiesStream).asModel();
-
-        assertTrue(replacements.containsAll(replacementModel));
+                propertiesStream);
+        // TODO
     }
     @Test
     public void shouldGetEtagForAnObject() throws RepositoryException {

diff --git a/fcrepo-kernel/src/main/java/org/fcrepo/kernel/FedoraResource.java b/fcrepo-kernel/src/main/java/org/fcrepo/kernel/FedoraResource.java
@@ -19,7 +19,8 @@
 import java.util.Iterator;
 
 import javax.jcr.Node;
-import javax.jcr.Property;import javax.jcr.version.Version;
+import javax.jcr.Property;
+import javax.jcr.version.Version;
 import javax.jcr.version.VersionHistory;
 
 import com.hp.hpl.jena.rdf.model.Resource;
@@ -175,7 +176,7 @@ RdfStream getTriples(IdentifierConverter<Resource, FedoraResource> graphSubjects
      * @param inputModel
      * @return RDFStream
      */
-    RdfStream replaceProperties(final IdentifierConverter<Resource, FedoraResource> graphSubjects,
+    void replaceProperties(final IdentifierConverter<Resource, FedoraResource> graphSubjects,
                                 final Model inputModel,
                                 final RdfStream originalTriples);
 

diff --git a/...utils/iterators/DifferencingIterator.java → .../iterators/GraphDifferencingIterator.java b/...utils/iterators/DifferencingIterator.java → .../iterators/GraphDifferencingIterator.java
@@ -15,12 +15,14 @@
  */
 package org.fcrepo.kernel.utils.iterators;
 
-import static com.google.common.collect.Sets.newHashSet;
-
 import java.util.Iterator;
 import java.util.Set;
 
 import com.google.common.collect.AbstractIterator;
+import com.hp.hpl.jena.graph.Graph;
+import com.hp.hpl.jena.graph.Triple;
+import com.hp.hpl.jena.rdf.model.Model;
+import com.hp.hpl.jena.rdf.model.ModelFactory;
 
 /**
  * A wrapping {@link Iterator} that calculates two differences between a
@@ -30,39 +32,39 @@
  *
  * @author ajs6f
  * @since Oct 24, 2013
- * @param <E> The type of element common to both source and set.
  */
-public class DifferencingIterator<E> extends AbstractIterator<E> {
+public class GraphDifferencingIterator extends AbstractIterator<Triple> {
 
-    Set<? extends E> notCommon;
+    Graph notCommon;
 
-    private Set<E> common;
+    private Graph common;
 
-    private Iterator<E> source;
+    private Iterator<Triple> source;
 
     /**
      * Ordinary constructor.
      *
      * @param original
      * @param source
      */
-    public DifferencingIterator(final Set<? extends E> original,
-            final Iterator<E> source) {
+    public GraphDifferencingIterator(final Model original,
+                                     final Iterator<Triple> source) {
         super();
-        this.notCommon = newHashSet(original);
-        this.common = newHashSet();
+        this.notCommon = original.getGraph();
+        this.common = ModelFactory.createDefaultModel().getGraph();
         this.source = source;
     }
 
     @Override
-    protected E computeNext() {
+    protected Triple computeNext() {
         if (source.hasNext()) {
-            E next = source.next();
+            Triple next = source.next();
             // we only want to return this element if it is not common
             // to the two inputs
             while (common.contains(next) || notCommon.contains(next)) {
                 // it was common, so shift it to common
-                if (notCommon.remove(next)) {
+                if (notCommon.contains(next)) {
+                    notCommon.delete(next);
                     common.add(next);
                 }
                 // move onto the next candidate
@@ -82,7 +84,7 @@ protected E computeNext() {
      *
      * @return The elements that turned out to be common to the two inputs.
      */
-    public Set<E> common() {
+    public Graph common() {
         return source.hasNext() ? null : common;
     }
 
@@ -91,7 +93,7 @@ public Set<E> common() {
      *
      * @return The elements that turned out not to be common to the two inputs.
      */
-    public Set<? extends E> notCommon() {
+    public Graph notCommon() {
         return source.hasNext() ? null : notCommon;
     }
 

diff --git a/fcrepo-kernel/src/test/java/org/fcrepo/kernel/utils/iterators/DifferencingIteratorTest.java b/fcrepo-kernel/src/test/java/org/fcrepo/kernel/utils/iterators/DifferencingIteratorTest.java
diff --git a/...kernel/src/test/java/org/fcrepo/kernel/utils/iterators/GraphDifferencingIteratorTest.java b/...kernel/src/test/java/org/fcrepo/kernel/utils/iterators/GraphDifferencingIteratorTest.java
@@ -0,0 +1,31 @@
+/**
+ * Copyright 2014 DuraSpace, Inc.
+ *
+ * Licensed 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.fcrepo.kernel.utils.iterators;
+
+import org.junit.Test;
+
+/**
+ * <p>DifferencingIteratorTest class.</p>
+ *
+ * @author ksclarke
+ */
+public class GraphDifferencingIteratorTest {
+
+    @Test
+    public void yepWeShouldHaveSome() {
+
+    }
+}