/*
* Copyright 2015-2016 OpenCB
*
* 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 org.opencb.opencga.storage.core.variant.io.json;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.opencb.biodata.models.variant.avro.VariantAnnotation;
import org.opencb.commons.io.DataReader;
import org.opencb.opencga.storage.core.variant.io.json.mixin.VariantAnnotationMixin;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.GZIPInputStream;
/**
* Created on 09/11/15.
*
* @author Jacobo Coll <jacobo167@gmail.com>
*/
public class VariantAnnotationJsonDataReader implements DataReader<VariantAnnotation> {
private InputStream inputStream = null;
private JsonParser parser;
private int readsCounter;
private File file;
protected Logger logger = LoggerFactory.getLogger(this.getClass().toString());
public VariantAnnotationJsonDataReader(File file) {
readsCounter = 0;
this.file = file;
}
public VariantAnnotationJsonDataReader(InputStream inputStream) {
this.inputStream = inputStream;
readsCounter = 0;
}
@Override
public boolean open() {
/** Open input stream **/
if (inputStream == null) {
try {
inputStream = new FileInputStream(file);
inputStream = new GZIPInputStream(inputStream);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
/** Innitialice Json parse**/
JsonFactory factory = new JsonFactory();
ObjectMapper jsonObjectMapper = new ObjectMapper(factory);
jsonObjectMapper.addMixIn(VariantAnnotation.class, VariantAnnotationMixin.class);
jsonObjectMapper.configure(MapperFeature.REQUIRE_SETTERS_FOR_GETTERS, true);
try {
parser = factory.createParser(inputStream);
} catch (IOException e) {
throw new RuntimeException(e);
}
return true;
}
@Override
public List<VariantAnnotation> read(int batchSize) {
List<VariantAnnotation> batch = new ArrayList<>(batchSize);
try {
for (int i = 0; i < batchSize && parser.nextToken() != null; i++) {
batch.add(parser.readValueAs(VariantAnnotation.class));
readsCounter++;
if (readsCounter % 1000 == 0) {
logger.debug("Element {}", readsCounter);
}
}
} catch (IOException e) {
throw new RuntimeException(e);
}
return batch;
}
@Override
public boolean close() {
try {
inputStream.close();
} catch (IOException e) {
throw new RuntimeException(e);
}
return true;
}
}