gistfile1.java

public class UriBuilder {

	private UriComponents builder;

	private UriBuilder(UriComponentsBuilder builder) {
		this.builder = builder.build();
	}

	public static UriBuilder uriFor(Class<?> controller) {

		RequestMapping annotation = controller.getAnnotation(RequestMapping.class);
		String[] mapping = (String[]) AnnotationUtils.getValue(annotation);

		if (mapping.length > 1) {
			throw new IllegalStateException("Multiple controller mappings defined! Unable to build URI!");
		}

		UriBuilder builder = new UriBuilder(ServletUriComponentsBuilder.fromCurrentServletMapping());
		return mapping.length == 0 ? builder : builder.slash(mapping[0]);
	}

	public UriBuilder slash(Object object) {

		String resource = StringUtils.trimLeadingCharacter(object.toString(), '/');
		resource = StringUtils.trimTrailingCharacter(resource, '/');

		return new UriBuilder(UriComponentsBuilder.fromUri(builder.toUri()).pathSegment(resource.split("/")));
	}


	@Override
	public String toString() {
		return builder.encode().toUriString();
	}

	public URI toUri() {
		return builder.encode().toUri();
	}
}