| /* |
| * 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.drill.exec.store.delta; |
| |
| import org.apache.drill.exec.metastore.MetadataProviderManager; |
| import org.apache.drill.exec.store.delta.format.DeltaFormatPlugin; |
| import org.apache.drill.exec.store.dfs.ReadEntryWithPath; |
| import org.apache.drill.exec.store.parquet.BaseParquetMetadataProvider; |
| import org.apache.drill.exec.store.parquet.metadata.Metadata; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| |
| import java.io.IOException; |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| |
| /** |
| * This is Metadata provider for Delta tables, which are read by Drill native Parquet reader |
| */ |
| public class DeltaParquetTableMetadataProvider extends BaseParquetMetadataProvider { |
| |
| private final DeltaFormatPlugin deltaFormatPlugin; |
| |
| private DeltaParquetTableMetadataProvider(Builder builder) throws IOException { |
| super(builder); |
| |
| this.deltaFormatPlugin = builder.formatPlugin; |
| |
| init((BaseParquetMetadataProvider) builder.metadataProviderManager().getTableMetadataProvider()); |
| } |
| |
| @Override |
| protected void initInternal() throws IOException { |
| Map<FileStatus, FileSystem> fileStatusConfMap = new LinkedHashMap<>(); |
| for (ReadEntryWithPath entry : entries) { |
| Path path = entry.getPath(); |
| FileSystem fs = path.getFileSystem(deltaFormatPlugin.getFsConf()); |
| fileStatusConfMap.put(fs.getFileStatus(Path.getPathWithoutSchemeAndAuthority(path)), fs); |
| } |
| parquetTableMetadata = Metadata.getParquetTableMetadata(fileStatusConfMap, readerConfig); |
| } |
| |
| public static class Builder extends BaseParquetMetadataProvider.Builder<Builder> { |
| private DeltaFormatPlugin formatPlugin; |
| |
| public Builder(MetadataProviderManager source) { |
| super(source); |
| } |
| |
| protected Builder withFormatPlugin(DeltaFormatPlugin formatPlugin) { |
| this.formatPlugin = formatPlugin; |
| return self(); |
| } |
| |
| @Override |
| protected Builder self() { |
| return this; |
| } |
| |
| @Override |
| public DeltaParquetTableMetadataProvider build() throws IOException { |
| return new DeltaParquetTableMetadataProvider(this); |
| } |
| } |
| } |