package org.cruxframework.crux.core.server.rest.util;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import org.cruxframework.crux.core.server.rest.core.dispatch.CacheInfo;
import org.cruxframework.crux.core.shared.rest.annotation.GET;
import org.cruxframework.crux.core.shared.rest.annotation.HttpMethod;
import org.cruxframework.crux.core.shared.rest.annotation.POST;
import org.cruxframework.crux.core.shared.rest.annotation.PUT;
import org.cruxframework.crux.core.shared.rest.annotation.StateValidationModel;
/**
*
* @author Thiago da Rosa de Bustamante
*
*/
public class HttpMethodHelper
{
/**
*
* @param method
* @return
* @throws InvalidRestMethod
*/
public static String getHttpMethod(Annotation[] annotations) throws InvalidRestMethod
{
return getHttpMethod(annotations, true);
}
public static String getHttpMethod(Annotation[] annotations, boolean allowNull) throws InvalidRestMethod
{
String httpMethod = null;
for (Annotation annotation : annotations)
{
HttpMethod http = annotation.annotationType().getAnnotation(HttpMethod.class);
if (http != null)
{
if (httpMethod != null)
{
throw new InvalidRestMethod("Crux REST methods can not be bound to more than one HTTP Method");
}
httpMethod = http.value();
}
}
if (!allowNull && httpMethod == null)
{
throw new InvalidRestMethod("Crux REST methods must be bound to one HTTP Method");
}
return httpMethod;
}
/**
*
* @param method
* @return
*/
public static CacheInfo getCacheInfoForGET(Method method)
{
GET get = method.getAnnotation(GET.class);
if (get != null)
{
return CacheInfo.parseCacheInfo(get);
}
return null;
}
public static StateValidationModel getStateValidationModel(Method method)
{
PUT put = method.getAnnotation(PUT.class);
if (put != null)
{
return put.validatePreviousState();
}
POST post = method.getAnnotation(POST.class);
if (post != null)
{
return post.validatePreviousState();
}
return null;
}
}