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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.easy.json;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import org.apache.drill.common.exceptions.ExecutionSetupException;
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.ExecConstants;
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.DrillFileSystem;
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.easy.json.JSONFormatPlugin.JSONFormatConfig;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonTypeName;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Maps;
public class JSONFormatPlugin extends EasyFormatPlugin<JSONFormatConfig> {
private static final boolean IS_COMPRESSIBLE = true;
private static final String DEFAULT_NAME = "json";
public JSONFormatPlugin(String name, DrillbitContext context, Configuration fsConf, StoragePluginConfig storageConfig) {
this(name, context, fsConf, storageConfig, new JSONFormatConfig());
}
public JSONFormatPlugin(String name, DrillbitContext context, Configuration fsConf, StoragePluginConfig config, JSONFormatConfig formatPluginConfig) {
super(name, context, fsConf, config, formatPluginConfig, true, false, false, IS_COMPRESSIBLE, formatPluginConfig.getExtensions(), DEFAULT_NAME);
}
@Override
public RecordReader getRecordReader(FragmentContext context, DrillFileSystem dfs, FileWork fileWork,
List<SchemaPath> columns, String userName) throws ExecutionSetupException {
return new JSONRecordReader(context, fileWork.getPath(), dfs, 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");
options.put("extended", Boolean.toString(context.getOptions().getOption(ExecConstants.JSON_EXTENDED_TYPES)));
options.put("uglify", Boolean.toString(context.getOptions().getOption(ExecConstants.JSON_WRITER_UGLIFY)));
RecordWriter recordWriter = new JsonRecordWriter();
recordWriter.init(options);
return recordWriter;
}
@JsonTypeName("json")
public static class JSONFormatConfig implements FormatPluginConfig {
public List<String> extensions = ImmutableList.of("json");
private static final List<String> DEFAULT_EXTS = ImmutableList.of("json");
@JsonInclude(JsonInclude.Include.NON_DEFAULT)
public List<String> getExtensions() {
if (extensions == null) {
// when loading an old JSONFormatConfig that doesn't contain an "extensions" attribute
return DEFAULT_EXTS;
}
return extensions;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((extensions == null) ? 0 : extensions.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
JSONFormatConfig other = (JSONFormatConfig) obj;
if (extensions == null) {
if (other.extensions != null) {
return false;
}
} else if (!extensions.equals(other.extensions)) {
return false;
}
return true;
}
}
@Override
public int getReaderOperatorType() {
return CoreOperatorType.JSON_SUB_SCAN_VALUE;
}
@Override
public int getWriterOperatorType() {
throw new UnsupportedOperationException();
}
@Override
public boolean supportsPushDown() {
return true;
}
}
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