/**
* Handles a call by first verifying the optional request conditions and continue the processing
* if possible. Note that in order to evaluate those conditions, {@link #getInfo()} or {@link
* #getInfo(Variant)} methods might be invoked.
*
* @return The response entity.
* @throws ResourceException
*/
protected Representation doConditionalHandle() throws ResourceException {
Representation result = null;
if (getConditions().hasSome()) {
RepresentationInfo resultInfo = null;
if (existing) {
if (isNegotiated()) {
resultInfo = doGetInfo(getPreferredVariant(getVariants(Method.GET)));
} else {
resultInfo = doGetInfo();
}
if (resultInfo == null) {
if ((getStatus() == null)
|| (getStatus().isSuccess() && !Status.SUCCESS_NO_CONTENT.equals(getStatus()))) {
setStatus(Status.CLIENT_ERROR_NOT_FOUND);
} else {
// Keep the current status as the developer might prefer
// a special status like 'method not authorized'.
}
} else {
Status status = getConditions().getStatus(getMethod(), resultInfo);
if (status != null) {
setStatus(status);
}
}
} else {
Status status = getConditions().getStatus(getMethod(), resultInfo);
if (status != null) {
setStatus(status);
}
}
if ((Method.GET.equals(getMethod()) || Method.HEAD.equals(getMethod()))
&& resultInfo instanceof Representation) {
result = (Representation) resultInfo;
} else if ((getStatus() != null) && getStatus().isSuccess()) {
// Conditions were passed successfully, continue the normal
// processing.
if (isNegotiated()) {
// Reset the list of variants, as the method differs.
getVariants().clear();
result = doNegotiatedHandle();
} else {
result = doHandle();
}
}
} else {
if (isNegotiated()) {
result = doNegotiatedHandle();
} else {
result = doHandle();
}
}
return result;
}
/**
* Handles a call for a local entity. By default, only GET and HEAD methods are implemented.
*
* @param request The request to handle.
* @param response The response to update.
* @param decodedPath The URL decoded entity path.
*/
@Override
protected void handleLocal(Request request, Response response, String decodedPath) {
int spi = decodedPath.indexOf("!/");
String fileUri;
String entryName;
if (spi != -1) {
fileUri = decodedPath.substring(0, spi);
entryName = decodedPath.substring(spi + 2);
} else {
fileUri = decodedPath;
entryName = "";
}
LocalReference fileRef = new LocalReference(fileUri);
if (Protocol.FILE.equals(fileRef.getSchemeProtocol())) {
final File file = fileRef.getFile();
if (Method.GET.equals(request.getMethod()) || Method.HEAD.equals(request.getMethod())) {
handleGet(request, response, file, entryName, getMetadataService());
} else if (Method.PUT.equals(request.getMethod())) {
handlePut(request, response, file, entryName);
} else {
response.setStatus(Status.CLIENT_ERROR_METHOD_NOT_ALLOWED);
response.getAllowedMethods().add(Method.GET);
response.getAllowedMethods().add(Method.HEAD);
response.getAllowedMethods().add(Method.PUT);
}
} else {
response.setStatus(Status.SERVER_ERROR_NOT_IMPLEMENTED, "Only works on local files.");
}
}
