package sample.jersey.providers;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.emfjson.jackson.module.EMFModule;
import javax.inject.Inject;
import javax.ws.rs.Consumes;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.Provider;
import java.io.IOException;
import java.io.InputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
@Provider
@Consumes("application/json")
public class JsonResourceBodyReader implements MessageBodyReader<Resource> {
@Inject
ResourceSet resourceSet;
@Override
public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return type == Resource.class || Resource.class.isAssignableFrom(type);
}
@Override
public Resource readFrom(Class<Resource> type, Type genericType,
Annotation[] annotations, MediaType mediaType,
MultivaluedMap<String, String> httpHeaders, InputStream entityStream)
throws IOException, WebApplicationException {
ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(new EMFModule(resourceSet));
Resource resource;
try {
resource = mapper.readValue(entityStream, Resource.class);
} catch (IOException e) {
return null;
}
return resource;
}
}