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package com.sun.jersey.samples.atomserver.resources;
import com.sun.syndication.feed.atom.Entry;
import com.sun.syndication.feed.atom.Feed;
import com.sun.syndication.io.FeedException;
import com.sun.jersey.api.ConflictException;
import com.sun.jersey.spi.MessageBodyWorkers;
import javax.ws.rs.core.UriBuilder;
import javax.ws.rs.core.UriInfo;
/**
*
* @author Paul.Sandoz@Sun.Com
*/
public class EditOptimisiticEntryResource extends EditEntryResource {
private final UriBuilder editUriBuilder;
public EditOptimisiticEntryResource(String entryId, int version,
UriInfo uriInfo, MessageBodyWorkers bodyContext) throws FeedException {
super(entryId, uriInfo, bodyContext);
// Get the edit link in the entry
Feed f = AtomStore.getFeedDocument();
Entry e = AtomStore.findEntry(entryId, f);
String editLink = AtomStore.getLink(e, "edit");
// Compare against the requested link
String editUri = uriInfo.getAbsolutePath().toString();
if (!editUri.startsWith(editLink)) {
// Response with 409 Conflict
throw new ConflictException();
}
// Increment the version and update the edit URI
int newVersion = version + 1;
editUri = editUri.replaceFirst("/" + version + "/",
"/" + newVersion + "/");
editUriBuilder = UriBuilder.fromUri(editUri);
}
protected UriBuilder getUriBuilder() {
return editUriBuilder;
}
}