src/main/java/design/persistence/importexport/XMLHandler.java


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package design.persistence.importexport;
import java.io.File;
import java.io.IOException;
import java.time.LocalDateTime;

import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.dataformat.xml.XmlMapper;
import design.persistence.Serializers;

public class XMLHandler implements DataHandler {

    private final DataSource dataSource;
    private final XmlMapper xmlMapper = new XmlMapper();

    public XMLHandler(DataSource dataSource) {
        this.dataSource = dataSource;

        Serializers.configureMapper(xmlMapper);
        SimpleModule module = dataSource.getJacksonModule();
        module.addSerializer(LocalDateTime.class, new Serializers.DateTimeStringSerializer());
        xmlMapper.registerModule(module);
    }

    @Override
    public void importData(File file) throws IOException {
        Object data = xmlMapper.readValue(file, dataSource.getTargetClass());
        dataSource.importData(data);
    }

    @Override
    public void exportData(File file) throws IOException {
        Object data = dataSource.exportData();
        xmlMapper.writerWithDefaultPrettyPrinter()
                .writeValue(file, data);
    }
}