org.glassfish.jersey.server.internal.routing.PatternRouter Maven / Gradle / Ivy
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package org.glassfish.jersey.server.internal.routing;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.inject.Inject;
import javax.inject.Provider;
import org.glassfish.jersey.server.ContainerRequest;
/**
* Matches the un-matched right-hand request path to a configured {@link Pattern pattern}.
*
* @author Paul Sandoz
* @author Marek Potociar (marek.potociar at oracle.com)
*/
class PatternRouter implements Router {
/**
* "Assisted injection" factory interface for {@link PatternRouter}.
*
* See also
* assisted injection in Guice.
*/
public static class Builder {
@Inject
private Provider contextProvider;
/**
* Build a pattern request router.
*
* @param routes next-level request pre-processing stages to be returned in case the request
* matching in the built router is successful.
* @return a pattern request router.
*/
public PatternRouter build(List> routes) {
return new PatternRouter(contextProvider, routes);
}
}
private final Provider contextProvider;
private final List> acceptedRoutes;
private PatternRouter(Provider contextProvider,
List> routes) {
this.contextProvider = contextProvider;
this.acceptedRoutes = routes;
}
@Override
public Continuation apply(final ContainerRequest request) {
final RoutingContext rc = contextProvider.get();
// Peek at matching information to obtain the remaining path to match
String path = rc.getFinalMatchingGroup();
/**
* For hierarchical matching Jersey modifies the regular
* expressions generated from @Path as follows:
* 1) prefix a '/' if one is not present.
* 2) remove any '/' if present from end, and postfix with a
* '(/.*)?' or '(/)?' matching group
* This "normalization" simplifies the matching algorithm
* and enables the support of automatic redirection.
*/
if (path.startsWith("/")) {
path = path.substring(1);
}
for (final Route acceptedRoute : acceptedRoutes) {
final Matcher m = acceptedRoute.routingPattern().matcher(path);
if (m.matches()) {
// Push match result information and rest of path to match
rc.pushMatchResult(m.toMatchResult());
return Continuation.of(request, acceptedRoute.next());
}
}
// No match
return Continuation.of(request);
}
}