/*
* Copyright 2015 Collective, Inc.
*
* Licensed 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 com.collective.celos.ci.testing.fixtures.convert;
import com.collective.celos.ci.mode.test.TestRun;
import com.collective.celos.ci.testing.fixtures.create.FixObjectCreator;
import com.collective.celos.ci.testing.structure.fixobject.AbstractFixObjectConverter;
import com.collective.celos.ci.testing.structure.fixobject.FixFile;
import org.apache.avro.Schema;
import org.apache.avro.file.DataFileWriter;
import org.apache.avro.generic.GenericDatumReader;
import org.apache.avro.generic.GenericDatumWriter;
import org.apache.avro.io.DatumReader;
import org.apache.avro.io.Decoder;
import org.apache.avro.io.DecoderFactory;
import java.io.*;
/**
* Created by akonopko on 9/29/14.
*/
public class JsonToAvroConverter extends AbstractFixObjectConverter<FixFile, FixFile> {
private final FixObjectCreator<FixFile> schemaCreator;
public JsonToAvroConverter(FixObjectCreator<FixFile> schemaCreator) {
this.schemaCreator = schemaCreator;
}
@Override
public FixFile convert(TestRun tr, FixFile ff) throws Exception {
Schema schema = new Schema.Parser().parse(schemaCreator.create(tr).getContent());
ByteArrayOutputStream baos = new ByteArrayOutputStream();
InputStream input = ff.getContent();
DataFileWriter<Object> writer;;
try {
DatumReader<Object> reader = new GenericDatumReader<>(schema);
DataInputStream din = new DataInputStream(input);
writer = new DataFileWriter<>(new GenericDatumWriter<>());
writer.create(schema, baos);
Decoder decoder = DecoderFactory.get().jsonDecoder(schema, din);
Object datum;
while (true) {
try {
datum = reader.read(null, decoder);
} catch (EOFException eofe) {
break;
}
writer.append(datum);
}
writer.flush();
} finally {
input.close();
}
return new FixFile(new ByteArrayInputStream(baos.toByteArray()));
}
}