| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.sling.api.resource.external; |
| |
| import java.net.URI; |
| import java.util.Optional; |
| |
| import org.apache.sling.api.resource.Resource; |
| import org.jetbrains.annotations.NotNull; |
| import org.osgi.annotation.versioning.ProviderType; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Provides a URI representing the given Resource. |
| * Implementations of this interface must ensure that the underlying security model is delegated |
| * securely and not circumvented. Typically resource provider bundles should implement this provider as in most cases |
| * internal implementation details of the resource will be required to achieve the implementation. Ideally |
| * implementations should be carefully reviewed by peers. |
| * @since 1.0.0 (Sling API Bundle 2.16.4) |
| */ |
| @ProviderType |
| public interface URIProvider { |
| |
| static final Logger LOG = LoggerFactory.getLogger(URIProvider.class); |
| |
| /** |
| * Defines which operation the URI may be used to perform. |
| */ |
| enum Operation { |
| /** |
| * The URI may be used to create resources at the resource identified by the Resource. |
| */ |
| CREATE, |
| /** |
| * The URI may be used to read the resource. |
| */ |
| READ, |
| /** |
| * The URI may be used to update the resource. |
| */ |
| UPDATE, |
| /** |
| * The URI may be used to delete the resource. |
| */ |
| DELETE |
| } |
| |
| /** |
| * Defines the scope in which the URI may be used. |
| * Implementations should pay close attention to the scope requested and not emit URIs inappropriate for the scope requested. |
| */ |
| enum Scope { |
| /** |
| * A External URI safe to be used by the requesting client in a external context. |
| * This does not imply it can be stored, shared between clients or published, only that the client may be on the public |
| * internet as opposed to an internal network. |
| */ |
| EXTERNAL, |
| /** |
| * Internal URI only to be used by a client on an internal network and never leaked onto a public network. |
| */ |
| INTERNAL, |
| /** |
| * A URI that may be published to many client in public context. Implementations should only issue URIs with this scope |
| * if the URI can safely be shared between multiple clients, and therefore by definition public to anonymous clients anywhere |
| * on the internet. |
| */ |
| PUBLIC |
| } |
| |
| /** |
| * Return a URI applicable to the defined scope. |
| * @param resource the resource to convert from. |
| * @param scope the required scope. |
| * @param operation the required operation. |
| * @return a URI if the resource has a URI suitable for the requested scope and operation, otherwise the implementation should throw an {@link IllegalArgumentException}. |
| * @throws IllegalArgumentException if a URI for the requested scope and operation cannot be provided to the caller. |
| * @deprecated Use {@link #toOptionalUri(Resource, Scope, Operation)} instead. |
| */ |
| @Deprecated |
| @NotNull URI toURI(@NotNull Resource resource, @NotNull Scope scope, @NotNull Operation operation); |
| |
| /** |
| * Return a URI applicable to the defined scope. |
| * @param resource the resource to convert from. |
| * @param scope the required scope. |
| * @param operation the required operation. |
| * @return a URI if the resource has a URI suitable for the requested scope and operation, otherwise {@link Optional#empty()}. |
| * @since 1.1.0 (Sling API Bundle 2.25.0) |
| */ |
| default @NotNull Optional<URI> toOptionalUri(@NotNull Resource resource, @NotNull Scope scope, @NotNull Operation operation) { |
| try { |
| return Optional.of(toURI(resource, scope, operation)); |
| } catch (IllegalArgumentException e) { |
| LOG.debug("{} declined toURI() for resource '{}' (scope {}, operation {})", this.getClass(), resource.getPath(), scope, operation, e); |
| return Optional.empty(); |
| } |
| } |
| |
| } |