package eu.dnetlib.parthenos.registry;

import java.io.IOException;
import java.io.StringWriter;
import java.util.UUID;

import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonGenerator;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/**
 * Created by Alessia Bardi on 02/10/2017.
 *
 * @author Alessia Bardi
 */
@RunWith(JUnit4.class)
public class JacksonTest {

	@Test
	public void testJackson() throws IOException {
		JsonFactory jsonFactory = new JsonFactory();
		StringWriter sw = new StringWriter();
		JsonGenerator jgen = jsonFactory.createGenerator(sw);
		jgen.writeStartObject();
		jgen.writeNumberField("id", 1);
		jgen.writeArrayFieldStart("array");
		jgen.writeStartObject();
		jgen.writeStringField("itemName", "theName");
		jgen.writeNumberField("owner", 3);
		jgen.writeEndObject();
		jgen.writeStartObject();
		jgen.writeStringField("itemName", "theName2");
		jgen.writeNumberField("owner", 8);
		jgen.writeEndObject();
		jgen.writeEndArray();
		jgen.writeEndObject();

		jgen.close();
		//sw.flush();
		System.out.println(sw.getBuffer().toString());
	}

	@Test
	public void testJacksonEmbeddedObject() throws IOException {
		JsonFactory jsonFactory = new JsonFactory();
		StringWriter sw = new StringWriter();
		JsonGenerator jgen = jsonFactory.createGenerator(sw);
		jgen.writeStartObject();
		jgen.writeNumberField("id", 1);
		jgen.writeObjectFieldStart("embeddedObj");
		jgen.writeStringField("itemName", "theName");
		jgen.writeNumberField("owner", 3);
		jgen.writeEndObject();
		jgen.writeEndObject();

		jgen.close();
		System.out.println(sw.getBuffer().toString());
	}

	@Test
	public void testHeader() throws IOException {
		JsonFactory jsonFactory = new JsonFactory();
		StringWriter sw = new StringWriter();
		JsonGenerator jgen = jsonFactory.createGenerator(sw);
		jgen.writeStartObject();
		jgen.writeObjectFieldStart("header");
		jgen.writeStringField("uuid", UUID.randomUUID().toString());
		jgen.writeEndObject();
		jgen.writeStringField("@class", "specificType");
		jgen.writeArrayFieldStart("consistsOf");
		jgen.writeEndArray();
		jgen.writeEndObject();

		jgen.close();
		System.out.println(sw.getBuffer().toString());
	}
}