/*
* Copyright 2014 the original author or authors.
*
* Licensed 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.springframework.data.rest.webmvc.alps;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.rest.core.config.RepositoryRestConfiguration;
import org.springframework.data.rest.webmvc.BaseUri;
import org.springframework.data.rest.webmvc.RepositoryLinksResource;
import org.springframework.hateoas.Link;
import org.springframework.hateoas.ResourceProcessor;
import org.springframework.util.Assert;
/**
* {@link ResourceProcessor} to add a {@code profile} link to the root resource to point to the ALPS resources in case
* the support for ALPS is activated.
*
* @author Oliver Gierke
*/
public class AlpsResourceProcessor implements ResourceProcessor<RepositoryLinksResource> {
private static final String PROFILE_REL = "profile";
private final RepositoryRestConfiguration configuration;
/**
* Creates a new {@link AlpsResourceProcessor} with the given {@link RepositoryRestConfiguration}.
*
* @param configuration must not be {@literal null}.
*/
@Autowired
public AlpsResourceProcessor(RepositoryRestConfiguration configuration) {
Assert.notNull(configuration, "RepositoryRestConfiguration must not be null!");
this.configuration = configuration;
}
/*
* (non-Javadoc)
* @see org.springframework.hateoas.ResourceProcessor#process(org.springframework.hateoas.ResourceSupport)
*/
@Override
public RepositoryLinksResource process(RepositoryLinksResource resource) {
if (configuration.metadataConfiguration().alpsEnabled()) {
BaseUri baseUri = new BaseUri(configuration.getBaseUri());
String href = baseUri.getUriComponentsBuilder().path(AlpsController.ALPS_ROOT_MAPPING).build().toString();
resource.add(new Link(href, PROFILE_REL));
}
return resource;
}
}