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 com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.fasterxml.jackson.dataformat.xml.XmlMapper;

public class XMLHandler implements DataHandler {

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

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

    @Override
    public void importData(File file) throws IOException {
        JsonNode tree = xmlMapper.readTree(file);
        JsonNode unwrapped = tree.get("items");
        dataSource.importData(unwrapped);
    }

    @Override
    public void exportData(File file) throws IOException {
        JsonNode tree = dataSource.exportData();
        ObjectNode wrapper = xmlMapper.createObjectNode();
        wrapper.set("items", tree);
        xmlMapper.writerWithDefaultPrettyPrinter().withRootName("export").writeValue(file, wrapper);
    }
}