/*
* 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.structure.fixobject.AbstractFixObjectConverter;
import com.collective.celos.ci.testing.structure.fixobject.FixFile;
import org.apache.avro.Schema;
import org.apache.avro.file.DataFileReader;
import org.apache.avro.file.FileReader;
import org.apache.avro.file.SeekableByteArrayInput;
import org.apache.avro.generic.GenericDatumReader;
import org.apache.avro.generic.GenericDatumWriter;
import org.apache.avro.io.DatumWriter;
import org.apache.avro.io.EncoderFactory;
import org.apache.avro.io.JsonEncoder;
import org.apache.commons.io.IOUtils;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
/**
* Created by akonopko on 9/29/14.
*/
public class AvroToJsonConverter extends AbstractFixObjectConverter<FixFile, FixFile> {
@Override
public FixFile convert(TestRun testRun, FixFile ff) throws IOException {
byte[] bytes = IOUtils.toByteArray(ff.getContent());
if (bytes.length == 0) {
return ff;
}
ByteArrayOutputStream os = new ByteArrayOutputStream();
GenericDatumReader<Object> reader = new GenericDatumReader<>();
FileReader<Object> fileReader = DataFileReader.openReader(new SeekableByteArrayInput(bytes), reader);
try {
Schema schema = fileReader.getSchema();
DatumWriter<Object> writer = new GenericDatumWriter<>(schema);
JsonEncoder encoder = EncoderFactory.get().jsonEncoder(schema, os);
for (Object datum : fileReader) {
writer.write(datum, encoder);
}
encoder.flush();
} finally {
fileReader.close();
}
return new FixFile(new ByteArrayInputStream(os.toByteArray()));
}
}