| /* |
| * 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.tinkerpop.gremlin.hadoop.structure.util; |
| |
| import org.apache.commons.configuration.BaseConfiguration; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.io.NullWritable; |
| import org.apache.hadoop.mapreduce.InputFormat; |
| import org.apache.tinkerpop.gremlin.hadoop.Constants; |
| import org.apache.tinkerpop.gremlin.hadoop.structure.io.VertexWritable; |
| |
| /** |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public final class ConfUtil { |
| |
| private ConfUtil() { |
| } |
| |
| public static org.apache.commons.configuration.Configuration makeApacheConfiguration(final Configuration hadoopConfiguration) { |
| final BaseConfiguration apacheConfiguration = new BaseConfiguration(); |
| apacheConfiguration.setDelimiterParsingDisabled(true); |
| hadoopConfiguration.iterator().forEachRemaining(e -> apacheConfiguration.setProperty(e.getKey(), e.getValue())); |
| return apacheConfiguration; |
| } |
| |
| public static Configuration makeHadoopConfiguration(final org.apache.commons.configuration.Configuration apacheConfiguration) { |
| final Configuration hadoopConfiguration = new Configuration(); |
| apacheConfiguration.getKeys().forEachRemaining(key -> { |
| final Object object = apacheConfiguration.getProperty(key); |
| hadoopConfiguration.set(key, object.toString()); |
| }); |
| return hadoopConfiguration; |
| } |
| |
| public static void mergeApacheIntoHadoopConfiguration(final org.apache.commons.configuration.Configuration apacheConfiguration, final Configuration hadoopConfiguration) { |
| apacheConfiguration.getKeys().forEachRemaining(key -> { |
| final Object object = apacheConfiguration.getProperty(key); |
| hadoopConfiguration.set(key, object.toString()); |
| }); |
| } |
| |
| public static InputFormat<NullWritable, VertexWritable> getReaderAsInputFormat(final Configuration hadoopConfiguration) { |
| final Class<?> readerClass = hadoopConfiguration.getClass(Constants.GREMLIN_HADOOP_GRAPH_READER, Object.class); |
| try { |
| return InputFormat.class.isAssignableFrom(readerClass) ? |
| (InputFormat<NullWritable, VertexWritable>) readerClass.newInstance() : |
| (InputFormat<NullWritable, VertexWritable>) Class.forName("org.apache.tinkerpop.gremlin.spark.structure.io.InputRDDFormat").newInstance(); |
| } catch (final Exception e) { |
| throw new IllegalStateException(e.getMessage(), e); |
| } |
| } |
| } |