/**
* 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.easy.json;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import org.apache.drill.common.exceptions.ExecutionSetupException;
import org.apache.drill.common.expression.FieldReference;
import org.apache.drill.common.expression.SchemaPath;
import org.apache.drill.common.logical.FormatPluginConfig;
import org.apache.drill.common.logical.StoragePluginConfig;
import org.apache.drill.exec.ops.FragmentContext;
import org.apache.drill.exec.proto.ExecProtos.FragmentHandle;
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.FileSystemConfig;
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.drill.exec.store.dfs.shim.DrillFileSystem;
import org.apache.drill.exec.store.easy.json.JSONFormatPlugin.JSONFormatConfig;
import com.fasterxml.jackson.annotation.JsonTypeName;
import org.apache.drill.exec.store.text.DrillTextRecordWriter;
import org.apache.hadoop.fs.FileSystem;
public class JSONFormatPlugin extends EasyFormatPlugin<JSONFormatConfig> {
public JSONFormatPlugin(String name, DrillbitContext context, DrillFileSystem fs, StoragePluginConfig storageConfig) {
this(name, context, fs, storageConfig, new JSONFormatConfig());
}
public JSONFormatPlugin(String name, DrillbitContext context, DrillFileSystem fs, StoragePluginConfig config, JSONFormatConfig formatPluginConfig) {
super(name, context, fs, config, formatPluginConfig, true, false, false, false, Lists.newArrayList("json"), "json");
}
@Override
public RecordReader getRecordReader(FragmentContext context, FileWork fileWork,
List<SchemaPath> columns) throws ExecutionSetupException {
return new JSONRecordReader2(context, fileWork.getPath(), this.getFileSystem().getUnderlying(), columns);
}
@Override
public RecordWriter getRecordWriter(FragmentContext context, EasyWriter writer) throws IOException {
Map<String, String> options = Maps.newHashMap();
options.put("location", writer.getLocation());
FragmentHandle handle = context.getHandle();
String fragmentId = String.format("%d_%d", handle.getMajorFragmentId(), handle.getMinorFragmentId());
options.put("prefix", fragmentId);
options.put("separator", " ");
options.put(FileSystem.FS_DEFAULT_NAME_KEY, ((FileSystemConfig)writer.getStorageConfig()).connection);
options.put("extension", "json");
RecordWriter recordWriter = new JsonRecordWriter();
recordWriter.init(options);
return recordWriter;
}
@JsonTypeName("json")
public static class JSONFormatConfig implements FormatPluginConfig {
@Override
public int hashCode() {
return 31;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() == obj.getClass())
return true;
return false;
}
}
@Override
public int getReaderOperatorType() {
return CoreOperatorType.JSON_SUB_SCAN_VALUE;
}
@Override
public int getWriterOperatorType() {
throw new UnsupportedOperationException();
}
@Override
public boolean supportsPushDown() {
return true;
}
}