MarshallTest.java

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 * This file is part of OpenNMS(R).
 *
 * Copyright (C) 2009-2011 The OpenNMS Group, Inc.
 * OpenNMS(R) is Copyright (C) 1999-2011 The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 *
 * OpenNMS(R) 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with OpenNMS(R).  If not, see:
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 *
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package org.opennms.netmgt.ncs.northbounder.transfer;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;

import org.junit.Before;
import org.junit.Test;
import org.xml.sax.SAXException;

/**
 * Tests Marshaling of North bound Alarm
 * 
 * FIXME: This is just a stub for getting started.  Needs lots of work.
 * 
 * @author <a mailto:brozow@opennms.org>Matt Brozowski</a>
 * @author <a mailto:david@opennms.org>David Hustace</a>
 */
public class MarshallTest {
	
    private Marshaller m_marshaller;
	private Unmarshaller m_unmarshaller;


    @Before
    public void setUp() throws JAXBException {
    	
		// Create a Marshaller
		JAXBContext context = JAXBContext.newInstance(ServiceAlarmNotification.class);
		m_marshaller = context.createMarshaller();
		m_marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

    
		m_unmarshaller = context.createUnmarshaller();

    }
    
    private <T> byte[] marshallToUTF8(T t) throws JAXBException {
    	
		ByteArrayOutputStream out = new ByteArrayOutputStream();

		// marshall the output
		m_marshaller.marshal(t, out);

		// verify its matches the expected results
		byte[] utf8 = out.toByteArray();
		
		return utf8;
    }
    
    private <T> T unmarshallFromUTF8(byte[] utf8, Class<T> expected) throws JAXBException {
		Source source = new StreamSource(new ByteArrayInputStream(utf8));
		return m_unmarshaller.unmarshal(source, expected).getValue();
    }

	@Test
	public void testMarshall() throws JAXBException, UnsupportedEncodingException, SAXException {
		
		String expectedXML = "" +
				"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n" + 
				"<ServiceAlarmNotification xmlns=\"http://junosspace.juniper.net/monitoring\">\n" + 
				"    <ServiceAlarm>\n" + 
				"        <Id>Id</Id>\n" + 
				"        <Name>Name</Name>\n" + 
				"        <Status>Status</Status>\n" + 
				"    </ServiceAlarm>\n" + 
				"    <ServiceAlarm>\n" + 
				"        <Id>Id</Id>\n" + 
				"        <Name>Name</Name>\n" + 
				"        <Status>Status</Status>\n" + 
				"    </ServiceAlarm>\n" + 
				"    <ServiceAlarm>\n" + 
				"        <Id>Id</Id>\n" + 
				"        <Name>Name</Name>\n" + 
				"        <Status>Status</Status>\n" + 
				"    </ServiceAlarm>\n" + 
				"    <ServiceAlarm>\n" + 
				"        <Id>Id</Id>\n" + 
				"        <Name>Name</Name>\n" + 
				"        <Status>Status</Status>\n" + 
				"    </ServiceAlarm>\n" + 
				"</ServiceAlarmNotification>\n" + 
				"";	
		

		List<ServiceAlarm> svcAlarms = new ArrayList<ServiceAlarm>();
		for(int i = 0; i < 4; i++) {
			svcAlarms.add(new ServiceAlarm("Id", "Name", "Status"));
		}

		ServiceAlarmNotification notification = new ServiceAlarmNotification();
		notification.setServiceAlarms(svcAlarms);
		
		byte[] utf8 = marshallToUTF8(notification);
		
		
		String result = new String(utf8, "UTF-8");
		assertEquals(expectedXML, result);
		
		System.err.println(result);
		
		ServiceAlarmNotification read = unmarshallFromUTF8(utf8, ServiceAlarmNotification.class);
		assertNotNull(read);
		
		String roundTrip = new String(marshallToUTF8(read));
		assertEquals(expectedXML, roundTrip);
	}

}