cas/src/main/java/org/springframework/security/cas/web/CasAuthenticationFilter.java
private boolean proxyTicketRequest(final boolean serviceTicketRequest,
			final HttpServletRequest request) {
		if (serviceTicketRequest) {
			return false;
		}
		final boolean result = authenticateAllArtifacts
				&& obtainArtifact(request) != null && !authenticated();
		if (logger.isDebugEnabled()) {
			logger.debug("proxyTicketRequest = " + result);
		}
		return result;
	}
private boolean proxyTicketRequest(final boolean serviceTicketRequest,
			final HttpServletRequest request) {
		if (serviceTicketRequest) {
			return false;
		}
		final boolean result = authenticateAllArtifacts
				&& obtainArtifact(request) != null && !authenticated();
		if (logger.isDebugEnabled()) {
			logger.debug("proxyTicketRequest = " + result);
		}
		return result;
	}
Indicates if the request is elgible to process a proxy ticket.
@param request
@return