/*
* 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 gobblin.test;
import java.lang.reflect.Type;
import java.util.Map;
import org.apache.avro.Schema;
import org.apache.avro.generic.GenericData;
import org.apache.avro.generic.GenericRecord;
import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.reflect.TypeToken;
import gobblin.configuration.WorkUnitState;
import gobblin.converter.SingleRecordIterable;
import gobblin.converter.ToAvroConverterBase;
/**
* An extension to {@link ToAvroConverterBase} for integration test.
*
* @author Yinan Li
*/
public class TestConverter extends ToAvroConverterBase<String, String> {
private static final Gson GSON = new Gson();
// Expect the input JSON string to be key-value pairs
private static final Type FIELD_ENTRY_TYPE = new TypeToken<Map<String, Object>>() {}.getType();
@Override
public Schema convertSchema(String schema, WorkUnitState workUnit) {
return new Schema.Parser().parse(schema);
}
@Override
public Iterable<GenericRecord> convertRecord(Schema schema, String inputRecord, WorkUnitState workUnit) {
JsonElement element = GSON.fromJson(inputRecord, JsonElement.class);
Map<String, Object> fields = GSON.fromJson(element, FIELD_ENTRY_TYPE);
GenericRecord record = new GenericData.Record(schema);
for (Map.Entry<String, Object> entry : fields.entrySet()) {
record.put(entry.getKey(), entry.getValue());
}
return new SingleRecordIterable<GenericRecord>(record);
}
}