package org.jboss.resteasy.plugins.providers.multipart;
import org.jboss.resteasy.annotations.providers.multipart.MultipartForm;
import org.jboss.resteasy.annotations.providers.multipart.PartType;
import org.jboss.resteasy.spi.WriterException;
import org.jboss.resteasy.util.FindAnnotation;
import javax.ws.rs.FormParam;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Provider;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.security.AccessController;
/**
* @author <a href="mailto:bill@burkecentral.com">Bill Burke</a>
* @version $Revision: 1 $
*/
@Provider
@Produces("multipart/form-data")
public class MultipartFormAnnotationWriter extends AbstractMultipartFormDataWriter implements MessageBodyWriter<Object>
{
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
{
return FindAnnotation.findAnnotation(annotations, MultipartForm.class) != null || type.isAnnotationPresent(MultipartForm.class);
}
public long getSize(Object o, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
{
return -1;
}
public void writeTo(Object obj, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream) throws IOException, WebApplicationException
{
MultipartFormDataOutput multipart = new MultipartFormDataOutput();
Class<?> theType = type;
while (theType != null && !theType.equals(Object.class))
{
getFields(theType, multipart, obj);
theType = theType.getSuperclass();
}
for (Method method : type.getMethods())
{
if (method.isAnnotationPresent(FormParam.class) && method.getName().startsWith("get") && method.getParameterTypes().length == 0
&& method.isAnnotationPresent(PartType.class))
{
FormParam param = method.getAnnotation(FormParam.class);
Object value = null;
try
{
value = method.invoke(obj);
}
catch (IllegalAccessException e)
{
throw new WriterException(e);
}
catch (InvocationTargetException e)
{
throw new WriterException(e.getCause());
}
PartType partType = method.getAnnotation(PartType.class);
multipart.addFormData(param.value(), value, method.getReturnType(), method.getGenericReturnType(), MediaType.valueOf(partType.value()));
}
}
write(multipart, mediaType, httpHeaders, entityStream);
}
protected void getFields(Class<?> type, MultipartFormDataOutput output, Object obj)
throws IOException
{
for (Field field : type.getDeclaredFields())
{
if (field.isAnnotationPresent(FormParam.class) && field.isAnnotationPresent(PartType.class))
{
AccessController.doPrivileged(new FieldEnablerPrivilegedAction(field));
FormParam param = field.getAnnotation(FormParam.class);
Object value = null;
try
{
value = field.get(obj);
}
catch (IllegalAccessException e)
{
throw new WriterException(e);
}
PartType partType = field.getAnnotation(PartType.class);
output.addFormData(param.value(), value, field.getType(), field.getGenericType(), MediaType.valueOf(partType.value()));
}
}
}
}