edu.pitt.dbmi.data.reader.metadata.MetadataFileWriter Maven / Gradle / Ivy
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/*
* Copyright (C) 2018 University of Pittsburgh.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
package edu.pitt.dbmi.data.reader.metadata;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectWriter;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;
/**
* Dec 18, 2018 2:39:25 PM
*
* @author Kevin V. Bui ([email protected])
* @version $Id: $Id
*/
public class MetadataFileWriter implements MetadataWriter {
/**
* Default constructor.
*/
public MetadataFileWriter() {
}
/**
* Writes the metadata as a string.
*
* @param metadata The metadata.
* @return The metadata as a string.
* @throws JsonProcessingException if an error occurs while processing the JSON.
*/
@Override
public String writeAsString(Metadata metadata) throws JsonProcessingException {
return new ObjectMapper()
.writer()
.withDefaultPrettyPrinter()
.writeValueAsString(metadata);
}
/**
* Writes the metadata to the specified output file.
*
* @param metadata The metadata to write.
* @param outputFile The output file to write the metadata to.
* @throws IOException If an error occurs while writing the metadata to the output file.
*/
@Override
public void write(Metadata metadata, Path outputFile) throws IOException {
ObjectWriter writer = new ObjectMapper().writer().withDefaultPrettyPrinter();
if (Files.exists(outputFile)) {
if (Files.deleteIfExists(outputFile)) {
Files.write(outputFile, writer.writeValueAsBytes(metadata), StandardOpenOption.CREATE);
}
} else {
Files.write(outputFile, writer.writeValueAsBytes(metadata), StandardOpenOption.CREATE);
}
}
}