| package org.apache.rya.reasoning.mr; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| import org.apache.hadoop.io.WritableComparable; |
| import org.apache.hadoop.io.WritableComparator; |
| import org.eclipse.rdf4j.model.Resource; |
| import org.eclipse.rdf4j.model.impl.SimpleValueFactory; |
| |
| /** |
| * Allows us to use an IRI or bnode for a key. |
| */ |
| public class ResourceWritable implements WritableComparable<ResourceWritable> { |
| private Resource val; |
| private int key = 0; // Allows for secondary sort |
| |
| public Resource get() { |
| return val; |
| } |
| |
| public void set(Resource val) { |
| this.val = val; |
| } |
| |
| public void set(Resource val, int sortKey) { |
| this.val = val; |
| this.key = sortKey; |
| } |
| |
| public void setSortKey(int key) { |
| this.key = key; |
| } |
| |
| @Override |
| public void write(DataOutput out) throws IOException { |
| if (val == null) { |
| out.writeUTF(""); |
| } |
| else { |
| out.writeUTF(val.toString()); |
| } |
| out.writeInt(key); |
| } |
| |
| @Override |
| public void readFields(DataInput in) throws IOException { |
| String s = in.readUTF(); |
| if (s.length() > 0) { |
| if (s.startsWith("_")) { |
| val = SimpleValueFactory.getInstance().createBNode(s.substring(2)); |
| } |
| else { |
| val = SimpleValueFactory.getInstance().createIRI(s); |
| } |
| } |
| key = in.readInt(); |
| } |
| |
| @Override |
| public int compareTo(ResourceWritable other) { |
| return val.stringValue().compareTo(other.val.stringValue()); |
| } |
| |
| @Override |
| public String toString() { |
| return "<" + val.stringValue() + ">"; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| else if (o == null || this.getClass() != o.getClass()) { |
| return false; |
| } |
| ResourceWritable other = (ResourceWritable) o; |
| if (this.val == null) { |
| return other.val == null; |
| } |
| else if (other.val == null) { |
| return false; |
| } |
| else if (this.val.stringValue() == null) { |
| return other.val.stringValue() == null; |
| } |
| else { |
| return this.val.stringValue().equals(other.val.stringValue()); |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| return val != null ? val.stringValue().hashCode() : 0; |
| } |
| |
| public static class PrimaryComparator extends WritableComparator { |
| PrimaryComparator() { |
| super(ResourceWritable.class, true); |
| } |
| @Override |
| public int compare(WritableComparable wc1, WritableComparable wc2) { |
| ResourceWritable node1 = (ResourceWritable) wc1; |
| ResourceWritable node2 = (ResourceWritable) wc2; |
| return node1.compareTo(node2); |
| } |
| } |
| |
| public static class SecondaryComparator extends WritableComparator { |
| SecondaryComparator() { |
| super(ResourceWritable.class, true); |
| } |
| @Override |
| public int compare(WritableComparable wc1, WritableComparable wc2) { |
| ResourceWritable node1 = (ResourceWritable) wc1; |
| ResourceWritable node2 = (ResourceWritable) wc2; |
| int result = node1.compareTo(node2); |
| if (result == 0) { |
| result = node1.key - node2.key; |
| } |
| return result; |
| } |
| } |
| } |