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/*******************************************************************************
* Copyright (c) 2013-2016 LAAS-CNRS (www.laas.fr)
* 7 Colonel Roche 31077 Toulouse - France
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Initial Contributors:
* Thierry Monteil : Project manager, technical co-manager
* Mahdi Ben Alaya : Technical co-manager
* Samir Medjiah : Technical co-manager
* Khalil Drira : Strategy expert
* Guillaume Garzone : Developer
* François Aïssaoui : Developer
*
* New contributors :
*******************************************************************************/
package org.eclipse.om2m.datamapping.jaxb;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.StringReader;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.Unmarshaller.Listener;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.eclipse.om2m.commons.constants.MimeMediaType;
import org.eclipse.om2m.commons.resource.AbstractFlexContainer;
import org.eclipse.om2m.commons.resource.URIList;
import org.eclipse.om2m.datamapping.service.DataMapperService;
import org.eclipse.persistence.jaxb.JAXBContextProperties;
import org.eclipse.persistence.jaxb.MarshallerProperties;
import org.eclipse.persistence.jaxb.UnmarshallerProperties;
/**
* Datamapper (JAXB) implementing DataMapper service
*/
public class Mapper implements DataMapperService {
/** XML Mapper logger */
private static Log LOGGER = LogFactory.getLog(Mapper.class);
/** JAXB Context, entry point to the JAXB API */
private JAXBContext context;
/** Resource package name used for JAXBContext instantiation */
// org.eclipse.om2m.commons.resource:
private String resourcePackage = "org.eclipse.om2m.commons.resource:org.eclipse.om2m.commons.resource.flexcontainerspec";
private String mediaType;
/**
* Private constructor that will create the JAXB context.
*/
public Mapper(String mediaType) {
this.mediaType=mediaType;
try {
if(context==null){
if(mediaType.equals(MimeMediaType.JSON)){
// JSON
ClassLoader classLoader = Mapper.class.getClassLoader();
InputStream iStreamJsonBinding = classLoader.getResourceAsStream("json-binding.json");
InputStream iStreamJsonBindingFlexcontainer = classLoader.getResourceAsStream("json-binding-flexcontainer.json");
List<Object> iStreamList = new ArrayList<>();
iStreamList.add(iStreamJsonBinding);
iStreamList.add(iStreamJsonBindingFlexcontainer);
Map<String, Object> properties = new HashMap<String, Object>();
properties.put("eclipselink-oxm-xml", iStreamList);
properties.put("eclipselink.media-type", "application/json");;
context = JAXBContext.newInstance(resourcePackage, classLoader , properties);
} else if (mediaType.equals(MimeMediaType.XML)) {
// XML
ClassLoader classLoader = Mapper.class.getClassLoader();
InputStream iStream = classLoader.getResourceAsStream("xml-binding.xml");
Map<String, Object> properties = new HashMap<String, Object>();
properties.put(JAXBContextProperties.OXM_METADATA_SOURCE, iStream);
context = JAXBContext.newInstance(resourcePackage, classLoader , properties);
} else {
// other
context = JAXBContext.newInstance(resourcePackage, Mapper.class.getClassLoader());
}
}
} catch (Throwable e) {
LOGGER.error("Create JAXBContext error", e);
}
}
/**
* Converts a resource Java object into resource XML representation.
*
* @param object
* - resource Java object
* @return resource XML representation
*/
@Override
public String objToString(Object obj) {
try {
Marshaller marshaller = context.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8");
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
marshaller.setProperty(MarshallerProperties.MEDIA_TYPE,mediaType);
if (obj instanceof URIList) {
marshaller.setProperty(MarshallerProperties.JSON_INCLUDE_ROOT, false);
marshaller.setProperty(MarshallerProperties.JSON_MARSHAL_EMPTY_COLLECTIONS, true);
marshaller.setProperty(MarshallerProperties.JSON_REDUCE_ANY_ARRAYS, false);
} else {
marshaller.setProperty(MarshallerProperties.JSON_INCLUDE_ROOT, true);
marshaller.setProperty(MarshallerProperties.JSON_MARSHAL_EMPTY_COLLECTIONS, false);
marshaller.setProperty(MarshallerProperties.JSON_REDUCE_ANY_ARRAYS, true);
}
marshaller.setProperty(MarshallerProperties.JSON_VALUE_WRAPPER, "val");
Map<String, String> namespaces = new HashMap<String, String>();
namespaces.put("http://www.onem2m.org/xml/protocols/homedomain", "hd");
namespaces.put("http://www.onem2m.org/xml/protocols", "m2m");
marshaller.setProperty(MarshallerProperties.NAMESPACE_PREFIX_MAPPER, namespaces);
marshaller.setProperty(MarshallerProperties.JSON_NAMESPACE_SEPARATOR, ':');
marshaller.marshal(obj, outputStream);
return outputStream.toString("UTF-8");
} catch (JAXBException e) {
LOGGER.error("JAXB marshalling error!", e);
} catch (UnsupportedEncodingException e) {
LOGGER.error("JAXB marshalling error!", e);
}
return null;
}
/**
* Converts a resource XML representation data into resource Java object.
*
* @param representation
* - resource XML representation
* @return resource Java object
*/
@Override
public Object stringToObj(String representation) {
if(representation.isEmpty()){
return null;
}
StringReader stringReader = new StringReader(representation);
try {
Unmarshaller unmarshaller = context.createUnmarshaller();
unmarshaller.setProperty(UnmarshallerProperties.MEDIA_TYPE, mediaType);
if (representation.contains("m2m:uril")) {
unmarshaller.setProperty(UnmarshallerProperties.JSON_INCLUDE_ROOT, true);
unmarshaller.setProperty(UnmarshallerProperties.JSON_WRAPPER_AS_ARRAY_NAME , true);
} else {
unmarshaller.setProperty(UnmarshallerProperties.JSON_INCLUDE_ROOT, true);
unmarshaller.setProperty(UnmarshallerProperties.JSON_WRAPPER_AS_ARRAY_NAME , false);
}
unmarshaller.setProperty(UnmarshallerProperties.JSON_VALUE_WRAPPER , "val");
Map<String, String> namespaces = new HashMap<String, String>();
namespaces.put("http://www.onem2m.org/xml/protocols/homedomain", "hd");
namespaces.put("http://www.onem2m.org/xml/protocols", "m2m");
unmarshaller.setProperty(MarshallerProperties.NAMESPACE_PREFIX_MAPPER, namespaces);
unmarshaller.setProperty(MarshallerProperties.JSON_NAMESPACE_SEPARATOR, ':');
unmarshaller.setListener(new Listener() {
@Override
public void afterUnmarshal(Object target, Object parent) {
LOGGER.debug("afterUnmarshal (target=" + target + ", parent=" + parent + ")");
super.afterUnmarshal(target, parent);
if (target instanceof AbstractFlexContainer) {
((AbstractFlexContainer) target).finalizeDeserialization();
}
}
});
Object unmarshaledObject = unmarshaller.unmarshal(stringReader);
Object toBeReturned = null;
toBeReturned = unmarshaledObject;
return toBeReturned;
} catch (JAXBException e) {
LOGGER.error("JAXB unmarshalling error!", e);
}
return null;
}
@Override
public String getServiceDataType() {
return mediaType;
}
}
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