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Posted to commits@jena.apache.org by rv...@apache.org on 2015/01/05 16:07:49 UTC
[41/52] [abbrv] jena git commit: Further rebranding to Elephas
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/AbstractNodeTupleNodeCountMapper.java
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diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/AbstractNodeTupleNodeCountMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/AbstractNodeTupleNodeCountMapper.java
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@@ -0,0 +1,66 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.count;
+
+import java.io.IOException;
+
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.mapreduce.Mapper;
+import org.apache.jena.hadoop.rdf.types.AbstractNodeTupleWritable;
+import org.apache.jena.hadoop.rdf.types.NodeWritable;
+
+
+/**
+ * Abstract mapper class for mappers which split node tuple values into pairs of
+ * node keys with a long value of 1. Can be used in conjunction with a
+ * {@link NodeCountReducer} to count the usages of each unique node.
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ * @param <TValue>
+ * Tuple type
+ * @param <T>
+ * Writable tuple type
+ */
+public abstract class AbstractNodeTupleNodeCountMapper<TKey, TValue, T extends AbstractNodeTupleWritable<TValue>> extends
+ Mapper<TKey, T, NodeWritable, LongWritable> {
+
+ private LongWritable initialCount = new LongWritable(1);
+
+ @Override
+ protected void map(TKey key, T value, Context context) throws IOException,
+ InterruptedException {
+ NodeWritable[] ns = this.getNodes(value);
+ for (NodeWritable n : ns) {
+ context.write(n, this.initialCount);
+ }
+ }
+
+ /**
+ * Gets the nodes of the tuple which are to be counted
+ *
+ * @param tuple
+ * Tuple
+ * @return Nodes
+ */
+ protected abstract NodeWritable[] getNodes(T tuple);
+
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/NodeCountReducer.java
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diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/NodeCountReducer.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/NodeCountReducer.java
new file mode 100644
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+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/NodeCountReducer.java
@@ -0,0 +1,50 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.count;
+
+import java.io.IOException;
+import java.util.Iterator;
+
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.mapreduce.Reducer;
+import org.apache.jena.hadoop.rdf.types.NodeWritable;
+
+
+/**
+ * A reducer which takes node keys with a sequence of longs representing counts
+ * as the values and sums the counts together into pairs consisting of a node
+ * key and a count value.
+ *
+ *
+ *
+ */
+public class NodeCountReducer extends Reducer<NodeWritable, LongWritable, NodeWritable, LongWritable> {
+
+ @Override
+ protected void reduce(NodeWritable key, Iterable<LongWritable> values, Context context) throws IOException,
+ InterruptedException {
+ long count = 0;
+ Iterator<LongWritable> iter = values.iterator();
+ while (iter.hasNext()) {
+ count += iter.next().get();
+ }
+ context.write(key, new LongWritable(count));
+ }
+
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/QuadNodeCountMapper.java
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diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/QuadNodeCountMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/QuadNodeCountMapper.java
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+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/QuadNodeCountMapper.java
@@ -0,0 +1,44 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.count;
+
+import org.apache.jena.hadoop.rdf.types.NodeWritable;
+import org.apache.jena.hadoop.rdf.types.QuadWritable;
+
+import com.hp.hpl.jena.sparql.core.Quad;
+
+/**
+ * A mapper for counting node usages within quads designed primarily for use in
+ * conjunction with {@link NodeCountReducer}
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public class QuadNodeCountMapper<TKey> extends AbstractNodeTupleNodeCountMapper<TKey, Quad, QuadWritable> {
+
+ @Override
+ protected NodeWritable[] getNodes(QuadWritable tuple) {
+ Quad q = tuple.get();
+ return new NodeWritable[] { new NodeWritable(q.getGraph()), new NodeWritable(q.getSubject()),
+ new NodeWritable(q.getPredicate()), new NodeWritable(q.getObject()) };
+ }
+
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/TripleNodeCountMapper.java
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diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/TripleNodeCountMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/TripleNodeCountMapper.java
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+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/TripleNodeCountMapper.java
@@ -0,0 +1,42 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.count;
+
+import org.apache.jena.hadoop.rdf.types.NodeWritable;
+import org.apache.jena.hadoop.rdf.types.TripleWritable;
+
+import com.hp.hpl.jena.graph.Triple;
+
+/**
+ * A mapper for counting node usages within triples designed primarily for use
+ * in conjunction with {@link NodeCountReducer}
+ *
+ *
+ *
+ * @param <TKey> Key type
+ */
+public class TripleNodeCountMapper<TKey> extends AbstractNodeTupleNodeCountMapper<TKey, Triple, TripleWritable> {
+
+ @Override
+ protected NodeWritable[] getNodes(TripleWritable tuple) {
+ Triple t = tuple.get();
+ return new NodeWritable[] { new NodeWritable(t.getSubject()), new NodeWritable(t.getPredicate()),
+ new NodeWritable(t.getObject()) };
+ }
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/datatypes/QuadDataTypeCountMapper.java
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diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/datatypes/QuadDataTypeCountMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/datatypes/QuadDataTypeCountMapper.java
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@@ -0,0 +1,56 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.count.datatypes;
+
+import org.apache.jena.hadoop.rdf.mapreduce.count.NodeCountReducer;
+import org.apache.jena.hadoop.rdf.mapreduce.count.QuadNodeCountMapper;
+import org.apache.jena.hadoop.rdf.types.NodeWritable;
+import org.apache.jena.hadoop.rdf.types.QuadWritable;
+
+import com.hp.hpl.jena.graph.Node;
+import com.hp.hpl.jena.graph.NodeFactory;
+
+/**
+ * A mapper for counting data type usages within quads designed primarily for
+ * use in conjunction with {@link NodeCountReducer}
+ * <p>
+ * This mapper extracts the data types for typed literal objects and converts
+ * them into nodes so they can be counted
+ * </p>
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public class QuadDataTypeCountMapper<TKey> extends QuadNodeCountMapper<TKey> {
+
+ private static final NodeWritable[] EMPTY = new NodeWritable[0];
+
+ @Override
+ protected NodeWritable[] getNodes(QuadWritable tuple) {
+ Node object = tuple.get().getObject();
+ if (!object.isLiteral())
+ return EMPTY;
+ String dtUri = object.getLiteralDatatypeURI();
+ if (dtUri == null)
+ return EMPTY;
+ return new NodeWritable[] { new NodeWritable(NodeFactory.createURI(dtUri)) };
+ }
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/datatypes/TripleDataTypeCountMapper.java
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diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/datatypes/TripleDataTypeCountMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/datatypes/TripleDataTypeCountMapper.java
new file mode 100644
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--- /dev/null
+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/datatypes/TripleDataTypeCountMapper.java
@@ -0,0 +1,56 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.count.datatypes;
+
+import org.apache.jena.hadoop.rdf.mapreduce.count.NodeCountReducer;
+import org.apache.jena.hadoop.rdf.mapreduce.count.TripleNodeCountMapper;
+import org.apache.jena.hadoop.rdf.types.NodeWritable;
+import org.apache.jena.hadoop.rdf.types.TripleWritable;
+
+import com.hp.hpl.jena.graph.Node;
+import com.hp.hpl.jena.graph.NodeFactory;
+
+/**
+ * A mapper for counting data type usages within triples designed primarily for
+ * use in conjunction with {@link NodeCountReducer}
+ * <p>
+ * This mapper extracts the data types for typed literal objects and converts
+ * them into nodes so they can be counted
+ * </p>
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public class TripleDataTypeCountMapper<TKey> extends TripleNodeCountMapper<TKey> {
+
+ private static final NodeWritable[] EMPTY = new NodeWritable[0];
+
+ @Override
+ protected NodeWritable[] getNodes(TripleWritable tuple) {
+ Node object = tuple.get().getObject();
+ if (!object.isLiteral())
+ return EMPTY;
+ String dtUri = object.getLiteralDatatypeURI();
+ if (dtUri == null)
+ return EMPTY;
+ return new NodeWritable[] { new NodeWritable(NodeFactory.createURI(dtUri)) };
+ }
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/namespaces/AbstractNodeTupleNamespaceCountMapper.java
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diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/namespaces/AbstractNodeTupleNamespaceCountMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/namespaces/AbstractNodeTupleNamespaceCountMapper.java
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+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/namespaces/AbstractNodeTupleNamespaceCountMapper.java
@@ -0,0 +1,135 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.count.namespaces;
+
+import java.io.IOException;
+
+import org.apache.hadoop.io.LongWritable;
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.mapreduce.Mapper;
+import org.apache.jena.hadoop.rdf.mapreduce.TextCountReducer;
+import org.apache.jena.hadoop.rdf.types.AbstractNodeTupleWritable;
+import org.apache.jena.hadoop.rdf.types.NodeWritable;
+
+import com.hp.hpl.jena.graph.Node;
+
+/**
+ * Abstract mapper class for mappers which split node tuple values and extract
+ * the namespace URIs they use and outputs pairs of namespaces keys with a long
+ * value of 1. Can be used in conjunction with a {@link TextCountReducer} to
+ * count the usages of each unique namespace.
+ *
+ *
+ *
+ * @param <TKey>
+ * @param <TValue>
+ * @param <T>
+ */
+public abstract class AbstractNodeTupleNamespaceCountMapper<TKey, TValue, T extends AbstractNodeTupleWritable<TValue>> extends
+ Mapper<TKey, T, Text, LongWritable> {
+
+ private LongWritable initialCount = new LongWritable(1);
+ protected static final String NO_NAMESPACE = null;
+
+ @Override
+ protected void map(TKey key, T value, Context context) throws IOException, InterruptedException {
+ NodeWritable[] ns = this.getNodes(value);
+ for (NodeWritable n : ns) {
+ String namespace = this.extractNamespace(n);
+ if (namespace != null) {
+ context.write(new Text(namespace), this.initialCount);
+ }
+ }
+ }
+
+ /**
+ * Extracts the namespace from a node
+ * <p>
+ * Finds the URI for the node (if any) and then invokes
+ * {@link #extractNamespace(String)} to extract the actual namespace URI.
+ * </p>
+ * <p>
+ * Derived classes may override this to change the logic of how namespaces
+ * are extracted.
+ * </p>
+ *
+ * @param nw
+ * Node
+ * @return Namespace
+ */
+ protected String extractNamespace(NodeWritable nw) {
+ Node n = nw.get();
+ if (n.isBlank() || n.isVariable())
+ return NO_NAMESPACE;
+ if (n.isLiteral()) {
+ String dtUri = n.getLiteralDatatypeURI();
+ if (dtUri == null)
+ return NO_NAMESPACE;
+ return extractNamespace(dtUri);
+ }
+ return extractNamespace(n.getURI());
+ }
+
+ /**
+ * Extracts the namespace from a URI
+ * <p>
+ * First tries to extract a hash based namespace. If that is not possible it
+ * tries to extract a slash based namespace, if this is not possible then
+ * the full URI is returned.
+ * </p>
+ * <p>
+ * Derived classes may override this to change the logic of how namespaces
+ * are extracted.
+ * </p>
+ *
+ * @param uri
+ * URI
+ * @return Namespace
+ */
+ protected String extractNamespace(String uri) {
+ if (uri.contains("#")) {
+ // Extract hash namespace
+ return uri.substring(0, uri.lastIndexOf('#') + 1);
+ } else if (uri.contains("/")) {
+ // Ensure that this is not immediately after the scheme component or
+ // at end of URI
+ int index = uri.lastIndexOf('/');
+ int schemeSepIndex = uri.indexOf(':');
+ if (index - schemeSepIndex <= 2 || index == uri.length() - 1) {
+ // Use full URI
+ return uri;
+ }
+
+ // Otherwise safe to extract slash namespace
+ return uri.substring(0, uri.lastIndexOf('/') + 1);
+ } else {
+ // Use full URI
+ return uri;
+ }
+ }
+
+ /**
+ * Gets the nodes of the tuple whose namespaces are to be counted
+ *
+ * @param tuple
+ * Tuple
+ * @return Nodes
+ */
+ protected abstract NodeWritable[] getNodes(T tuple);
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/namespaces/QuadNamespaceCountMapper.java
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diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/namespaces/QuadNamespaceCountMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/namespaces/QuadNamespaceCountMapper.java
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@@ -0,0 +1,44 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.count.namespaces;
+
+import org.apache.jena.hadoop.rdf.mapreduce.TextCountReducer;
+import org.apache.jena.hadoop.rdf.types.NodeWritable;
+import org.apache.jena.hadoop.rdf.types.QuadWritable;
+
+import com.hp.hpl.jena.sparql.core.Quad;
+
+/**
+ * A mapper for counting namespace usages within quads designed primarily for
+ * use in conjunction with the {@link TextCountReducer}
+ *
+ *
+ *
+ * @param <TKey>
+ */
+public class QuadNamespaceCountMapper<TKey> extends AbstractNodeTupleNamespaceCountMapper<TKey, Quad, QuadWritable> {
+
+ @Override
+ protected NodeWritable[] getNodes(QuadWritable tuple) {
+ Quad q = tuple.get();
+ return new NodeWritable[] { new NodeWritable(q.getGraph()), new NodeWritable(q.getSubject()),
+ new NodeWritable(q.getPredicate()), new NodeWritable(q.getObject()) };
+ }
+
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/namespaces/TripleNamespaceCountMapper.java
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diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/namespaces/TripleNamespaceCountMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/namespaces/TripleNamespaceCountMapper.java
new file mode 100644
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+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/namespaces/TripleNamespaceCountMapper.java
@@ -0,0 +1,44 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.count.namespaces;
+
+import org.apache.jena.hadoop.rdf.mapreduce.TextCountReducer;
+import org.apache.jena.hadoop.rdf.types.NodeWritable;
+import org.apache.jena.hadoop.rdf.types.TripleWritable;
+
+import com.hp.hpl.jena.graph.Triple;
+
+/**
+ * A mapper for counting namespace usages within triples designed primarily for
+ * use in conjunction with the {@link TextCountReducer}
+ *
+ *
+ *
+ * @param <TKey>
+ */
+public class TripleNamespaceCountMapper<TKey> extends AbstractNodeTupleNamespaceCountMapper<TKey, Triple, TripleWritable> {
+
+ @Override
+ protected NodeWritable[] getNodes(TripleWritable tuple) {
+ Triple t = tuple.get();
+ return new NodeWritable[] { new NodeWritable(t.getSubject()), new NodeWritable(t.getPredicate()),
+ new NodeWritable(t.getObject()) };
+ }
+
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/QuadObjectCountMapper.java
----------------------------------------------------------------------
diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/QuadObjectCountMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/QuadObjectCountMapper.java
new file mode 100644
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@@ -0,0 +1,42 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.count.positional;
+
+import org.apache.jena.hadoop.rdf.mapreduce.count.NodeCountReducer;
+import org.apache.jena.hadoop.rdf.mapreduce.count.QuadNodeCountMapper;
+import org.apache.jena.hadoop.rdf.types.NodeWritable;
+import org.apache.jena.hadoop.rdf.types.QuadWritable;
+
+
+/**
+ * A mapper for counting object node usages within quads designed primarily for
+ * use in conjunction with {@link NodeCountReducer}
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public class QuadObjectCountMapper<TKey> extends QuadNodeCountMapper<TKey> {
+
+ @Override
+ protected NodeWritable[] getNodes(QuadWritable tuple) {
+ return new NodeWritable[] { new NodeWritable(tuple.get().getObject()) };
+ }
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/QuadPredicateCountMapper.java
----------------------------------------------------------------------
diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/QuadPredicateCountMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/QuadPredicateCountMapper.java
new file mode 100644
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@@ -0,0 +1,42 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.count.positional;
+
+import org.apache.jena.hadoop.rdf.mapreduce.count.NodeCountReducer;
+import org.apache.jena.hadoop.rdf.mapreduce.count.QuadNodeCountMapper;
+import org.apache.jena.hadoop.rdf.types.NodeWritable;
+import org.apache.jena.hadoop.rdf.types.QuadWritable;
+
+
+/**
+ * A mapper for counting predicate node usages within quads designed primarily
+ * for use in conjunction with {@link NodeCountReducer}
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public class QuadPredicateCountMapper<TKey> extends QuadNodeCountMapper<TKey> {
+
+ @Override
+ protected NodeWritable[] getNodes(QuadWritable tuple) {
+ return new NodeWritable[] { new NodeWritable(tuple.get().getPredicate()) };
+ }
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/QuadSubjectCountMapper.java
----------------------------------------------------------------------
diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/QuadSubjectCountMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/QuadSubjectCountMapper.java
new file mode 100644
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+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/QuadSubjectCountMapper.java
@@ -0,0 +1,41 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.count.positional;
+
+import org.apache.jena.hadoop.rdf.mapreduce.count.NodeCountReducer;
+import org.apache.jena.hadoop.rdf.mapreduce.count.QuadNodeCountMapper;
+import org.apache.jena.hadoop.rdf.types.NodeWritable;
+import org.apache.jena.hadoop.rdf.types.QuadWritable;
+
+
+/**
+ * A mapper for counting subject node usages within quads designed primarily for use
+ * in conjunction with {@link NodeCountReducer}
+ *
+ *
+ *
+ * @param <TKey> Key type
+ */
+public class QuadSubjectCountMapper<TKey> extends QuadNodeCountMapper<TKey> {
+
+ @Override
+ protected NodeWritable[] getNodes(QuadWritable tuple) {
+ return new NodeWritable[] { new NodeWritable(tuple.get().getSubject()) };
+ }
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/TripleObjectCountMapper.java
----------------------------------------------------------------------
diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/TripleObjectCountMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/TripleObjectCountMapper.java
new file mode 100644
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@@ -0,0 +1,41 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.count.positional;
+
+import org.apache.jena.hadoop.rdf.mapreduce.count.NodeCountReducer;
+import org.apache.jena.hadoop.rdf.mapreduce.count.TripleNodeCountMapper;
+import org.apache.jena.hadoop.rdf.types.NodeWritable;
+import org.apache.jena.hadoop.rdf.types.TripleWritable;
+
+
+/**
+ * A mapper for counting object node usages within triples designed primarily for use
+ * in conjunction with {@link NodeCountReducer}
+ *
+ *
+ *
+ * @param <TKey> Key type
+ */
+public class TripleObjectCountMapper<TKey> extends TripleNodeCountMapper<TKey> {
+
+ @Override
+ protected NodeWritable[] getNodes(TripleWritable tuple) {
+ return new NodeWritable[] { new NodeWritable(tuple.get().getObject()) };
+ }
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/TriplePredicateCountMapper.java
----------------------------------------------------------------------
diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/TriplePredicateCountMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/TriplePredicateCountMapper.java
new file mode 100644
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--- /dev/null
+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/TriplePredicateCountMapper.java
@@ -0,0 +1,42 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.count.positional;
+
+import org.apache.jena.hadoop.rdf.mapreduce.count.NodeCountReducer;
+import org.apache.jena.hadoop.rdf.mapreduce.count.TripleNodeCountMapper;
+import org.apache.jena.hadoop.rdf.types.NodeWritable;
+import org.apache.jena.hadoop.rdf.types.TripleWritable;
+
+
+/**
+ * A mapper for counting predicate node usages within triples designed primarily
+ * for use in conjunction with {@link NodeCountReducer}
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public class TriplePredicateCountMapper<TKey> extends TripleNodeCountMapper<TKey> {
+
+ @Override
+ protected NodeWritable[] getNodes(TripleWritable tuple) {
+ return new NodeWritable[] { new NodeWritable(tuple.get().getPredicate()) };
+ }
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/TripleSubjectCountMapper.java
----------------------------------------------------------------------
diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/TripleSubjectCountMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/TripleSubjectCountMapper.java
new file mode 100644
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+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/count/positional/TripleSubjectCountMapper.java
@@ -0,0 +1,41 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.count.positional;
+
+import org.apache.jena.hadoop.rdf.mapreduce.count.NodeCountReducer;
+import org.apache.jena.hadoop.rdf.mapreduce.count.TripleNodeCountMapper;
+import org.apache.jena.hadoop.rdf.types.NodeWritable;
+import org.apache.jena.hadoop.rdf.types.TripleWritable;
+
+
+/**
+ * A mapper for counting subject node usages within triples designed primarily for use
+ * in conjunction with {@link NodeCountReducer}
+ *
+ *
+ *
+ * @param <TKey> Key type
+ */
+public class TripleSubjectCountMapper<TKey> extends TripleNodeCountMapper<TKey> {
+
+ @Override
+ protected NodeWritable[] getNodes(TripleWritable tuple) {
+ return new NodeWritable[] { new NodeWritable(tuple.get().getSubject()) };
+ }
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/AbstractNodeTupleFilterMapper.java
----------------------------------------------------------------------
diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/AbstractNodeTupleFilterMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/AbstractNodeTupleFilterMapper.java
new file mode 100644
index 0000000..1ecec75
--- /dev/null
+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/AbstractNodeTupleFilterMapper.java
@@ -0,0 +1,76 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.filter;
+
+import java.io.IOException;
+
+import org.apache.hadoop.mapreduce.Mapper;
+import org.apache.jena.hadoop.rdf.mapreduce.RdfMapReduceConstants;
+import org.apache.jena.hadoop.rdf.types.AbstractNodeTupleWritable;
+
+
+/**
+ * Abstract mapper implementation which helps in filtering tuples from the
+ * input, derived implementations provide an implementation of the
+ * {@link #accepts(TKey, T)}
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ * @param <TValue>
+ * Tuple type
+ * @param <T>
+ * Writable tuple type
+ */
+@SuppressWarnings("javadoc")
+public abstract class AbstractNodeTupleFilterMapper<TKey, TValue, T extends AbstractNodeTupleWritable<TValue>> extends
+ Mapper<TKey, T, TKey, T> {
+
+ private boolean invert = false;
+
+ @Override
+ protected void setup(Context context) throws IOException, InterruptedException {
+ super.setup(context);
+ this.invert = context.getConfiguration().getBoolean(RdfMapReduceConstants.FILTER_INVERT, this.invert);
+ }
+
+ @Override
+ protected final void map(TKey key, T value, Context context) throws IOException, InterruptedException {
+ if (this.accepts(key, value)) {
+ if (!this.invert)
+ context.write(key, value);
+ } else if (this.invert) {
+ context.write(key, value);
+ }
+ }
+
+ /**
+ * Gets whether the mapper accepts the key value pair and will pass it as
+ * output
+ *
+ * @param key
+ * Key
+ * @param tuple
+ * Tuple value
+ * @return True if the mapper accepts the given key value pair, false
+ * otherwise
+ */
+ protected abstract boolean accepts(TKey key, T tuple);
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/AbstractQuadFilterMapper.java
----------------------------------------------------------------------
diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/AbstractQuadFilterMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/AbstractQuadFilterMapper.java
new file mode 100644
index 0000000..3caf051
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+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/AbstractQuadFilterMapper.java
@@ -0,0 +1,35 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.filter;
+
+import org.apache.jena.hadoop.rdf.types.QuadWritable;
+
+import com.hp.hpl.jena.sparql.core.Quad;
+
+/**
+ * Abstract mapper implementation for filtering quads
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public abstract class AbstractQuadFilterMapper<TKey> extends AbstractNodeTupleFilterMapper<TKey, Quad, QuadWritable> {
+
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/AbstractTripleFilterMapper.java
----------------------------------------------------------------------
diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/AbstractTripleFilterMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/AbstractTripleFilterMapper.java
new file mode 100644
index 0000000..e99e369
--- /dev/null
+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/AbstractTripleFilterMapper.java
@@ -0,0 +1,35 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.filter;
+
+import org.apache.jena.hadoop.rdf.types.TripleWritable;
+
+import com.hp.hpl.jena.graph.Triple;
+
+/**
+ * Abstract mapper implementation for filtering triples
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public abstract class AbstractTripleFilterMapper<TKey> extends AbstractNodeTupleFilterMapper<TKey, Triple, TripleWritable> {
+
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/GroundQuadFilterMapper.java
----------------------------------------------------------------------
diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/GroundQuadFilterMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/GroundQuadFilterMapper.java
new file mode 100644
index 0000000..c2a6ab9
--- /dev/null
+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/GroundQuadFilterMapper.java
@@ -0,0 +1,47 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.filter;
+
+import org.apache.jena.hadoop.rdf.types.QuadWritable;
+
+import com.hp.hpl.jena.sparql.core.Quad;
+
+/**
+ * A quad filter which accepts only ground quads i.e. those with no blank nodes
+ * or variables
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public class GroundQuadFilterMapper<TKey> extends AbstractQuadFilterMapper<TKey> {
+
+ @Override
+ protected boolean accepts(Object key, QuadWritable tuple) {
+ Quad q = tuple.get();
+ if (!q.isConcrete())
+ return false;
+ // Ground if all nodes are URI/Literal
+ return (q.getGraph().isURI() || q.getGraph().isLiteral()) && (q.getSubject().isURI() || q.getSubject().isLiteral())
+ && (q.getPredicate().isURI() || q.getPredicate().isLiteral())
+ && (q.getObject().isURI() || q.getObject().isLiteral());
+ }
+
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/GroundTripleFilterMapper.java
----------------------------------------------------------------------
diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/GroundTripleFilterMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/GroundTripleFilterMapper.java
new file mode 100644
index 0000000..f83a0e5
--- /dev/null
+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/GroundTripleFilterMapper.java
@@ -0,0 +1,47 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.filter;
+
+import org.apache.jena.hadoop.rdf.types.TripleWritable;
+
+import com.hp.hpl.jena.graph.Triple;
+
+/**
+ * A triple filter which accepts only ground triples i.e. those with no blank
+ * nodes or variables
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public class GroundTripleFilterMapper<TKey> extends AbstractTripleFilterMapper<TKey> {
+
+ @Override
+ protected boolean accepts(Object key, TripleWritable tuple) {
+ Triple t = tuple.get();
+ if (!t.isConcrete())
+ return false;
+ // Ground if all nodes are URI/Literal
+ return (t.getSubject().isURI() || t.getSubject().isLiteral())
+ && (t.getPredicate().isURI() || t.getPredicate().isLiteral())
+ && (t.getObject().isURI() || t.getObject().isLiteral());
+ }
+
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/ValidQuadFilterMapper.java
----------------------------------------------------------------------
diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/ValidQuadFilterMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/ValidQuadFilterMapper.java
new file mode 100644
index 0000000..86771fa
--- /dev/null
+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/ValidQuadFilterMapper.java
@@ -0,0 +1,48 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.filter;
+
+import org.apache.jena.hadoop.rdf.types.QuadWritable;
+
+import com.hp.hpl.jena.sparql.core.Quad;
+
+/**
+ * A quad filter mapper which accepts only valid quads, by which we mean they
+ * meet the following criteria:
+ * <ul>
+ * <li>Graph is a URI or Blank Node</li>
+ * <li>Subject is a URI or Blank Node</li>
+ * <li>Predicate is a URI</li>
+ * <li>Object is a URI, Blank Node or Literal</li>
+ * </ul>
+ *
+ *
+ *
+ * @param <TKey>
+ */
+public final class ValidQuadFilterMapper<TKey> extends AbstractQuadFilterMapper<TKey> {
+
+ @Override
+ protected final boolean accepts(TKey key, QuadWritable tuple) {
+ Quad q = tuple.get();
+ return (q.getGraph().isURI() || q.getGraph().isBlank()) && (q.getSubject().isURI() || q.getSubject().isBlank())
+ && q.getPredicate().isURI() && (q.getObject().isURI() || q.getObject().isBlank() || q.getObject().isLiteral());
+ }
+
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/ValidTripleFilterMapper.java
----------------------------------------------------------------------
diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/ValidTripleFilterMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/ValidTripleFilterMapper.java
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+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/ValidTripleFilterMapper.java
@@ -0,0 +1,47 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.filter;
+
+import org.apache.jena.hadoop.rdf.types.TripleWritable;
+
+import com.hp.hpl.jena.graph.Triple;
+
+/**
+ * A triple filter mapper which accepts only valid triples, by which we mean they
+ * meet the following criteria:
+ * <ul>
+ * <li>Subject is a URI or Blank Node</li>
+ * <li>Predicate is a URI</li>
+ * <li>Object is a URI, Blank Node or Literal</li>
+ * </ul>
+ *
+ *
+ *
+ * @param <TKey>
+ */
+public final class ValidTripleFilterMapper<TKey> extends AbstractTripleFilterMapper<TKey> {
+
+ @Override
+ protected final boolean accepts(TKey key, TripleWritable tuple) {
+ Triple t = tuple.get();
+ return (t.getSubject().isURI() || t.getSubject().isBlank()) && t.getPredicate().isURI()
+ && (t.getObject().isURI() || t.getObject().isBlank() || t.getObject().isLiteral());
+ }
+
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/AbstractQuadFilterByPositionMapper.java
----------------------------------------------------------------------
diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/AbstractQuadFilterByPositionMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/AbstractQuadFilterByPositionMapper.java
new file mode 100644
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--- /dev/null
+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/AbstractQuadFilterByPositionMapper.java
@@ -0,0 +1,171 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.filter.positional;
+
+import org.apache.jena.hadoop.rdf.mapreduce.filter.AbstractQuadFilterMapper;
+import org.apache.jena.hadoop.rdf.types.QuadWritable;
+
+import com.hp.hpl.jena.graph.Node;
+import com.hp.hpl.jena.sparql.core.Quad;
+
+/**
+ * An abstract triple filter that filters quads based on different criteria for
+ * each position (graph, subject, predicate and object) within the quad.
+ * <p>
+ * By default this implementation eliminates all quads it sees, derived
+ * implementations need to override one or more of the specific accept methods
+ * in order to actually accept some triples. See
+ * {@link QuadFilterByPredicateMapper} for an example implementation.
+ * </p>
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public abstract class AbstractQuadFilterByPositionMapper<TKey> extends AbstractQuadFilterMapper<TKey> {
+
+ @Override
+ protected final boolean accepts(Object key, QuadWritable tuple) {
+ Quad q = tuple.get();
+ if (!this.acceptsAllGraphs()) {
+ Node g = q.getGraph();
+ if (!this.acceptsGraph(g))
+ return false;
+ }
+ if (!this.acceptsAllSubjects()) {
+ Node s = q.getSubject();
+ if (!this.acceptsSubject(s))
+ return false;
+ }
+ if (!this.acceptsAllPredicates()) {
+ Node p = q.getPredicate();
+ if (!this.acceptsPredicate(p))
+ return false;
+ }
+ if (!this.acceptsAllObjects()) {
+ Node o = q.getObject();
+ if (!this.acceptsObject(o))
+ return false;
+ }
+
+ return true;
+ }
+
+ /**
+ * Gets whether this filter accepts all graphs, if false then the
+ * {@link #acceptsGraph(Node)} method will be called to determine if a
+ * specific graph is acceptable
+ * <p>
+ * Default behaviour if not overridden is to return {@code false}
+ * </p>
+ *
+ * @return True if all graphs are accepted, false otherwise
+ */
+ protected boolean acceptsAllGraphs() {
+ return false;
+ }
+
+ /**
+ * Gets whether a specific graph is acceptable
+ *
+ * @param graph
+ * Graph
+ * @return True if accepted, false otherwise
+ */
+ protected boolean acceptsGraph(Node graph) {
+ return false;
+ }
+
+ /**
+ * Gets whether this filter accepts all subjects, if false then the
+ * {@link #acceptsSubject(Node)} method will be called to determine if a
+ * specific subject is acceptable
+ * <p>
+ * Default behaviour if not overridden is to return {@code false}
+ * </p>
+ *
+ * @return True if all subjects are accepted, false otherwise
+ */
+ protected boolean acceptsAllSubjects() {
+ return false;
+ }
+
+ /**
+ * Gets whether a specific subject is acceptable
+ *
+ * @param subject
+ * Subject
+ * @return True if accepted, false otherwise
+ */
+ protected boolean acceptsSubject(Node subject) {
+ return false;
+ }
+
+ /**
+ * Gets whether this filter accepts all predicate, if false then the
+ * {@link #acceptsPredicate(Node)} method will be called to determine if a
+ * specific predicate is acceptable
+ * <p>
+ * Default behaviour if not overridden is to return {@code false}
+ * </p>
+ *
+ * @return True if all predicates are accepted, false otherwise
+ */
+ protected boolean acceptsAllPredicates() {
+ return false;
+ }
+
+ /**
+ * Gets whether a specific predicate is acceptable
+ *
+ * @param predicate
+ * Predicate
+ * @return True if accepted, false otherwise
+ */
+ protected boolean acceptsPredicate(Node predicate) {
+ return false;
+ }
+
+ /**
+ * Gets whether this filter accepts all objects, if false then the
+ * {@link #acceptsObject(Node)} method will be called to determine if a
+ * specific object is acceptable
+ * <p>
+ * Default behaviour if not overridden is to return {@code false}
+ * </p>
+ *
+ * @return True if all objects are accepted, false otherwise
+ */
+ protected boolean acceptsAllObjects() {
+ return false;
+ }
+
+ /**
+ * Gets whether a specific object is acceptable
+ *
+ * @param object
+ * Object
+ * @return True if accepted, false otherwise
+ */
+ protected boolean acceptsObject(Node object) {
+ return false;
+ }
+
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/AbstractTripleFilterByPositionMapper.java
----------------------------------------------------------------------
diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/AbstractTripleFilterByPositionMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/AbstractTripleFilterByPositionMapper.java
new file mode 100644
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--- /dev/null
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@@ -0,0 +1,141 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.filter.positional;
+
+import org.apache.jena.hadoop.rdf.mapreduce.filter.AbstractTripleFilterMapper;
+import org.apache.jena.hadoop.rdf.types.TripleWritable;
+
+import com.hp.hpl.jena.graph.Node;
+import com.hp.hpl.jena.graph.Triple;
+
+/**
+ * An abstract triple filter that filters triples based on different criteria
+ * for each position (subject, predicate and object) within the triple.
+ * <p>
+ * By default this implementation eliminates all triples it sees, derived
+ * implementations need to override one or more of the specific accept methods
+ * in order to actually accept some triples. See
+ * {@link TripleFilterByPredicateUriMapper} for an example implementation.
+ * </p>
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public abstract class AbstractTripleFilterByPositionMapper<TKey> extends AbstractTripleFilterMapper<TKey> {
+
+ @Override
+ protected final boolean accepts(Object key, TripleWritable tuple) {
+ Triple t = tuple.get();
+ if (!this.acceptsAllSubjects()) {
+ Node s = t.getSubject();
+ if (!this.acceptsSubject(s))
+ return false;
+ }
+ if (!this.acceptsAllPredicates()) {
+ Node p = t.getPredicate();
+ if (!this.acceptsPredicate(p))
+ return false;
+ }
+ if (!this.acceptsAllObjects()) {
+ Node o = t.getObject();
+ if (!this.acceptsObject(o))
+ return false;
+ }
+
+ return true;
+ }
+
+ /**
+ * Gets whether this filter accepts all subjects, if false then the
+ * {@link #acceptsSubject(Node)} method will be called to determine if a
+ * specific subject is acceptable
+ * <p>
+ * Default behaviour if not overridden is to return {@code false}
+ * </p>
+ *
+ * @return True if all subjects are accepted, false otherwise
+ */
+ protected boolean acceptsAllSubjects() {
+ return false;
+ }
+
+ /**
+ * Gets whether a specific subject is acceptable
+ *
+ * @param subject
+ * Subject
+ * @return True if accepted, false otherwise
+ */
+ protected boolean acceptsSubject(Node subject) {
+ return false;
+ }
+
+ /**
+ * Gets whether this filter accepts all predicate, if false then the
+ * {@link #acceptsPredicate(Node)} method will be called to determine if a
+ * specific predicate is acceptable
+ * <p>
+ * Default behaviour if not overridden is to return {@code false}
+ * </p>
+ *
+ * @return True if all predicates are accepted, false otherwise
+ */
+ protected boolean acceptsAllPredicates() {
+ return false;
+ }
+
+ /**
+ * Gets whether a specific predicate is acceptable
+ *
+ * @param predicate
+ * Predicate
+ * @return True if accepted, false otherwise
+ */
+ protected boolean acceptsPredicate(Node predicate) {
+ return false;
+ }
+
+ /**
+ * Gets whether this filter accepts all objects, if false then the
+ * {@link #acceptsObject(Node)} method will be called to determine if a
+ * specific object is acceptable
+ * <p>
+ * Default behaviour if not overridden is to return {@code false}
+ * </p>
+ *
+ * @return True if all objects are accepted, false otherwise
+ */
+ protected boolean acceptsAllObjects() {
+ return false;
+ }
+
+ /**
+ * Gets whether a specific object is acceptable
+ *
+ * @param object
+ * Object
+ * @return True if accepted, false otherwise
+ */
+ protected boolean acceptsObject(Node object) {
+ return false;
+ }
+
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/QuadFilterByGraphUriMapper.java
----------------------------------------------------------------------
diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/QuadFilterByGraphUriMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/QuadFilterByGraphUriMapper.java
new file mode 100644
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@@ -0,0 +1,76 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.filter.positional;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.jena.hadoop.rdf.mapreduce.RdfMapReduceConstants;
+
+import com.hp.hpl.jena.graph.Node;
+import com.hp.hpl.jena.graph.NodeFactory;
+
+/**
+ * A quad filter which selects quads which have matching subjects
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public class QuadFilterByGraphUriMapper<TKey> extends AbstractQuadFilterByPositionMapper<TKey> {
+
+ private List<Node> graphs = new ArrayList<Node>();
+
+ @Override
+ protected void setup(Context context) throws IOException, InterruptedException {
+ super.setup(context);
+
+ // Get the subject URIs we are filtering on
+ String[] graphUris = context.getConfiguration().getStrings(RdfMapReduceConstants.FILTER_GRAPH_URIS);
+ if (graphUris != null) {
+ for (String graphUri : graphUris) {
+ this.graphs.add(NodeFactory.createURI(graphUri));
+ }
+ }
+ }
+
+ @Override
+ protected boolean acceptsAllSubjects() {
+ return true;
+ }
+
+ @Override
+ protected boolean acceptsGraph(Node graph) {
+ if (this.graphs.size() == 0)
+ return false;
+ return this.graphs.contains(graph);
+ }
+
+ @Override
+ protected boolean acceptsAllPredicates() {
+ return true;
+ }
+
+ @Override
+ protected boolean acceptsAllObjects() {
+ return true;
+ }
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/QuadFilterByObjectUriMapper.java
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diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/QuadFilterByObjectUriMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/QuadFilterByObjectUriMapper.java
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+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/QuadFilterByObjectUriMapper.java
@@ -0,0 +1,76 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.filter.positional;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.jena.hadoop.rdf.mapreduce.RdfMapReduceConstants;
+
+import com.hp.hpl.jena.graph.Node;
+import com.hp.hpl.jena.graph.NodeFactory;
+
+/**
+ * A quad filter which selects quads which have matching objects
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public class QuadFilterByObjectUriMapper<TKey> extends AbstractQuadFilterByPositionMapper<TKey> {
+
+ private List<Node> objects = new ArrayList<Node>();
+
+ @Override
+ protected void setup(Context context) throws IOException, InterruptedException {
+ super.setup(context);
+
+ // Get the subject URIs we are filtering on
+ String[] objectUris = context.getConfiguration().getStrings(RdfMapReduceConstants.FILTER_OBJECT_URIS);
+ if (objectUris != null) {
+ for (String objectUri : objectUris) {
+ this.objects.add(NodeFactory.createURI(objectUri));
+ }
+ }
+ }
+
+ @Override
+ protected boolean acceptsAllGraphs() {
+ return true;
+ }
+
+ @Override
+ protected boolean acceptsObject(Node object) {
+ if (this.objects.size() == 0)
+ return false;
+ return this.objects.contains(object);
+ }
+
+ @Override
+ protected boolean acceptsAllPredicates() {
+ return true;
+ }
+
+ @Override
+ protected boolean acceptsAllSubjects() {
+ return true;
+ }
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/QuadFilterByPredicateMapper.java
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diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/QuadFilterByPredicateMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/QuadFilterByPredicateMapper.java
new file mode 100644
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--- /dev/null
+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/QuadFilterByPredicateMapper.java
@@ -0,0 +1,76 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.filter.positional;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.jena.hadoop.rdf.mapreduce.RdfMapReduceConstants;
+
+import com.hp.hpl.jena.graph.Node;
+import com.hp.hpl.jena.graph.NodeFactory;
+
+/**
+ * A quad filter which selects quads which have matching predicates
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public class QuadFilterByPredicateMapper<TKey> extends AbstractQuadFilterByPositionMapper<TKey> {
+
+ private List<Node> predicates = new ArrayList<Node>();
+
+ @Override
+ protected void setup(Context context) throws IOException, InterruptedException {
+ super.setup(context);
+
+ // Get the predicate URIs we are filtering on
+ String[] predicateUris = context.getConfiguration().getStrings(RdfMapReduceConstants.FILTER_PREDICATE_URIS);
+ if (predicateUris != null) {
+ for (String predicateUri : predicateUris) {
+ this.predicates.add(NodeFactory.createURI(predicateUri));
+ }
+ }
+ }
+
+ @Override
+ protected boolean acceptsAllGraphs() {
+ return true;
+ }
+
+ @Override
+ protected boolean acceptsAllSubjects() {
+ return true;
+ }
+
+ @Override
+ protected boolean acceptsPredicate(Node predicate) {
+ if (this.predicates.size() == 0)
+ return false;
+ return this.predicates.contains(predicate);
+ }
+
+ @Override
+ protected boolean acceptsAllObjects() {
+ return true;
+ }
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/QuadFilterBySubjectUriMapper.java
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diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/QuadFilterBySubjectUriMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/QuadFilterBySubjectUriMapper.java
new file mode 100644
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+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/QuadFilterBySubjectUriMapper.java
@@ -0,0 +1,76 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.filter.positional;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.jena.hadoop.rdf.mapreduce.RdfMapReduceConstants;
+
+import com.hp.hpl.jena.graph.Node;
+import com.hp.hpl.jena.graph.NodeFactory;
+
+/**
+ * A quad filter which selects quads which have matching subjects
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public class QuadFilterBySubjectUriMapper<TKey> extends AbstractQuadFilterByPositionMapper<TKey> {
+
+ private List<Node> subjects = new ArrayList<Node>();
+
+ @Override
+ protected void setup(Context context) throws IOException, InterruptedException {
+ super.setup(context);
+
+ // Get the subject URIs we are filtering on
+ String[] subjectUris = context.getConfiguration().getStrings(RdfMapReduceConstants.FILTER_SUBJECT_URIS);
+ if (subjectUris != null) {
+ for (String subjectUri : subjectUris) {
+ this.subjects.add(NodeFactory.createURI(subjectUri));
+ }
+ }
+ }
+
+ @Override
+ protected boolean acceptsAllGraphs() {
+ return true;
+ }
+
+ @Override
+ protected boolean acceptsSubject(Node subject) {
+ if (this.subjects.size() == 0)
+ return false;
+ return this.subjects.contains(subject);
+ }
+
+ @Override
+ protected boolean acceptsAllPredicates() {
+ return true;
+ }
+
+ @Override
+ protected boolean acceptsAllObjects() {
+ return true;
+ }
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/TripleFilterByObjectUriMapper.java
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diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/TripleFilterByObjectUriMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/TripleFilterByObjectUriMapper.java
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@@ -0,0 +1,71 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.filter.positional;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.jena.hadoop.rdf.mapreduce.RdfMapReduceConstants;
+
+import com.hp.hpl.jena.graph.Node;
+import com.hp.hpl.jena.graph.NodeFactory;
+
+/**
+ * A triple filter which selects triples which have matching objects
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public class TripleFilterByObjectUriMapper<TKey> extends AbstractTripleFilterByPositionMapper<TKey> {
+
+ private List<Node> objects = new ArrayList<Node>();
+
+ @Override
+ protected void setup(Context context) throws IOException, InterruptedException {
+ super.setup(context);
+
+ // Get the subject URIs we are filtering on
+ String[] objectUris = context.getConfiguration().getStrings(RdfMapReduceConstants.FILTER_OBJECT_URIS);
+ if (objectUris != null) {
+ for (String objectUri : objectUris) {
+ this.objects.add(NodeFactory.createURI(objectUri));
+ }
+ }
+ }
+
+ @Override
+ protected boolean acceptsObject(Node object) {
+ if (this.objects.size() == 0)
+ return false;
+ return this.objects.contains(object);
+ }
+
+ @Override
+ protected boolean acceptsAllPredicates() {
+ return true;
+ }
+
+ @Override
+ protected boolean acceptsAllSubjects() {
+ return true;
+ }
+}
http://git-wip-us.apache.org/repos/asf/jena/blob/49c4cffe/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/TripleFilterByPredicateUriMapper.java
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diff --git a/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/TripleFilterByPredicateUriMapper.java b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/TripleFilterByPredicateUriMapper.java
new file mode 100644
index 0000000..061a3e7
--- /dev/null
+++ b/jena-elephas/jena-elephas-mapreduce/src/main/java/org/apache/jena/hadoop/rdf/mapreduce/filter/positional/TripleFilterByPredicateUriMapper.java
@@ -0,0 +1,71 @@
+/*
+ * 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.jena.hadoop.rdf.mapreduce.filter.positional;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.apache.jena.hadoop.rdf.mapreduce.RdfMapReduceConstants;
+
+import com.hp.hpl.jena.graph.Node;
+import com.hp.hpl.jena.graph.NodeFactory;
+
+/**
+ * A triple filter which selects triples which have matching predicates
+ *
+ *
+ *
+ * @param <TKey>
+ * Key type
+ */
+public class TripleFilterByPredicateUriMapper<TKey> extends AbstractTripleFilterByPositionMapper<TKey> {
+
+ private List<Node> predicates = new ArrayList<Node>();
+
+ @Override
+ protected void setup(Context context) throws IOException, InterruptedException {
+ super.setup(context);
+
+ // Get the predicate URIs we are filtering on
+ String[] predicateUris = context.getConfiguration().getStrings(RdfMapReduceConstants.FILTER_PREDICATE_URIS);
+ if (predicateUris != null) {
+ for (String predicateUri : predicateUris) {
+ this.predicates.add(NodeFactory.createURI(predicateUri));
+ }
+ }
+ }
+
+ @Override
+ protected boolean acceptsAllSubjects() {
+ return true;
+ }
+
+ @Override
+ protected boolean acceptsPredicate(Node predicate) {
+ if (this.predicates.size() == 0)
+ return false;
+ return this.predicates.contains(predicate);
+ }
+
+ @Override
+ protected boolean acceptsAllObjects() {
+ return true;
+ }
+}