| /* |
| * 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. |
| */ |
| /** |
| * Class defines a single partition corresponding to a directory in a DFS table. |
| */ |
| package org.apache.drill.exec.planner; |
| |
| |
| import org.apache.drill.exec.util.DrillFileSystemUtil; |
| import com.google.common.collect.Lists; |
| import org.apache.hadoop.fs.Path; |
| |
| import java.util.Collection; |
| import java.util.List; |
| |
| /** |
| * Composite partition location corresponds to a directory in the file system. |
| * */ |
| public class DFSDirPartitionLocation implements PartitionLocation { |
| // Similar to directory / file structures, subPartitions could be either a DFSDirPartitionLocation or DFSFilePartitionLocation |
| private final Collection<PartitionLocation> subPartitions; |
| private final String[] dirs; |
| |
| public DFSDirPartitionLocation(String[] dirs, Collection<PartitionLocation> subPartitions) { |
| this.subPartitions = subPartitions; |
| this.dirs = dirs; |
| } |
| |
| @Override |
| public String getPartitionValue(int index) { |
| assert index < dirs.length; |
| return dirs[index]; |
| } |
| |
| @Override |
| public Path getEntirePartitionLocation() { |
| throw new UnsupportedOperationException("Should not call getEntirePartitionLocation for composite partition location!"); |
| } |
| |
| @Override |
| public List<SimplePartitionLocation> getPartitionLocationRecursive() { |
| List<SimplePartitionLocation> results = Lists.newArrayList(); |
| |
| for (final PartitionLocation partitionLocation : subPartitions) { |
| results.addAll(partitionLocation.getPartitionLocationRecursive()); |
| } |
| |
| return results; |
| } |
| |
| @Override |
| public boolean isCompositePartition() { |
| return true; |
| } |
| |
| @Override |
| public Path getCompositePartitionPath() { |
| StringBuilder path = new StringBuilder(); |
| for (String dir : dirs) { |
| if (dir == null) { // get the prefix |
| break; |
| } |
| path.append("/") |
| .append(dir); |
| } |
| |
| return DrillFileSystemUtil.createPathSafe(path.toString()); |
| } |
| } |