framework/application/kernel/core/src/main/java/org/ldp4j/application/kernel/endpoint/EndpointManagementService.java
private Date getModificationDate(Endpoint endpoint, Date modificationDate) {
		Date result=endpoint.lastModified();
		if(modificationDate.after(result)) {
			result=modificationDate;
		}
		return result;
	}
private Date getModificationDate(Endpoint endpoint, Date modificationDate) {
		Date result=endpoint.lastModified();
		if(modificationDate.after(result)) {
			result=modificationDate;
		}
		return result;
	}
Enforce http://tools.ietf.org/html/rfc7232#section-2.2:
if the clock in the request is ahead of the clock of the origin
server (e.g., I request from Spain the update of a resource held in USA)
the last-modified data should be changed to that of the request and not
a generated date from the origin server