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/*
* 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.image;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import org.apache.drill.common.exceptions.ExecutionSetupException;
import org.apache.drill.common.expression.SchemaPath;
import org.apache.drill.common.logical.StoragePluginConfig;
import org.apache.drill.exec.ops.FragmentContext;
import org.apache.drill.exec.planner.common.DrillStatsTable;
import org.apache.drill.exec.proto.UserBitShared.CoreOperatorType;
import org.apache.drill.exec.server.DrillbitContext;
import org.apache.drill.exec.store.RecordReader;
import org.apache.drill.exec.store.RecordWriter;
import org.apache.drill.exec.store.dfs.DrillFileSystem;
import org.apache.drill.exec.store.dfs.easy.EasyFormatPlugin;
import org.apache.drill.exec.store.dfs.easy.EasyWriter;
import org.apache.drill.exec.store.dfs.easy.FileWork;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
public class ImageFormatPlugin extends EasyFormatPlugin<ImageFormatConfig> {
private final static String DEFAULT_NAME = "image";
public ImageFormatPlugin(String name, DrillbitContext context, Configuration fsConf,
StoragePluginConfig storageConfig) {
super(name, context, fsConf, storageConfig, new ImageFormatConfig(), true, false, false, false,
Collections.<String>emptyList(), DEFAULT_NAME);
}
public ImageFormatPlugin(String name, DrillbitContext context, Configuration fsConf,
StoragePluginConfig storageConfig, ImageFormatConfig formatConfig) {
super(name, context, fsConf, storageConfig, formatConfig, true, false, false, false,
formatConfig.getExtensions(), DEFAULT_NAME);
}
@Override
public RecordReader getRecordReader(FragmentContext context, DrillFileSystem dfs, FileWork fileWork,
List<SchemaPath> columns, String userName) throws ExecutionSetupException {
return new ImageRecordReader(context, dfs, fileWork.getPath(),
((ImageFormatConfig)formatConfig).hasFileSystemMetadata(),
((ImageFormatConfig)formatConfig).isDescriptive(),
((ImageFormatConfig)formatConfig).getTimeZone());
}
@Override
public RecordWriter getRecordWriter(FragmentContext context, EasyWriter writer) throws IOException {
throw new UnsupportedOperationException("Drill doesn't currently support writing to image files.");
}
@Override
public int getReaderOperatorType() {
return CoreOperatorType.IMAGE_SUB_SCAN_VALUE;
}
@Override
public int getWriterOperatorType() {
throw new UnsupportedOperationException("Drill doesn't currently support writing to image files.");
}
@Override
public boolean supportsPushDown() {
return true;
}
@Override
public boolean supportsStatistics() {
return false;
}
@Override
public DrillStatsTable.TableStatistics readStatistics(FileSystem fs, Path statsTablePath) throws IOException {
return null;
}
@Override
public void writeStatistics(DrillStatsTable.TableStatistics statistics, FileSystem fs, Path statsTablePath) throws IOException {
}
}
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