/*
* Copyright 2012-2014 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.config;
import static org.springframework.util.ClassUtils.*;
import static org.springframework.util.StringUtils.*;
import org.springframework.core.MethodParameter;
import org.springframework.data.repository.core.RepositoryInformation;
import org.springframework.data.repository.support.Repositories;
import org.springframework.data.rest.core.mapping.ResourceMappings;
import org.springframework.data.rest.core.mapping.ResourceMetadata;
import org.springframework.data.rest.webmvc.BaseUri;
import org.springframework.data.rest.webmvc.util.UriUtils;
import org.springframework.util.Assert;
import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.method.support.ModelAndViewContainer;
/**
* {@link HandlerMethodArgumentResolver} to create {@link ResourceMetadata} instances.
*
* @author Jon Brisbin
* @author Oliver Gierke
*/
public class ResourceMetadataHandlerMethodArgumentResolver implements HandlerMethodArgumentResolver {
private final Repositories repositories;
private final ResourceMappings mappings;
private final BaseUri baseUri;
/**
* Creates a new {@link ResourceMetadataHandlerMethodArgumentResolver} for the given {@link Repositories} and
* {@link ResourceMappings}.
*
* @param repositories must not be {@literal null}.
* @param mappings must not be {@literal null}.
* @param baseUri must not be {@literal null}.
*/
public ResourceMetadataHandlerMethodArgumentResolver(Repositories repositories, ResourceMappings mappings,
BaseUri baseUri) {
Assert.notNull(repositories, "Repositories must not be null!");
Assert.notNull(mappings, "ResourceMappings must not be null!");
Assert.notNull(baseUri, "BaseUri must not be null!");
this.repositories = repositories;
this.mappings = mappings;
this.baseUri = baseUri;
}
/*
* (non-Javadoc)
* @see org.springframework.web.method.support.HandlerMethodArgumentResolver#supportsParameter(org.springframework.core.MethodParameter)
*/
@Override
public boolean supportsParameter(MethodParameter parameter) {
return isAssignable(parameter.getParameterType(), RepositoryInformation.class);
}
/*
* (non-Javadoc)
* @see org.springframework.web.method.support.HandlerMethodArgumentResolver#resolveArgument(org.springframework.core.MethodParameter, org.springframework.web.method.support.ModelAndViewContainer, org.springframework.web.context.request.NativeWebRequest, org.springframework.web.bind.support.WebDataBinderFactory)
*/
@Override
public ResourceMetadata resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
String lookupPath = baseUri.getRepositoryLookupPath(webRequest);
String repositoryKey = UriUtils.findMappingVariable("repository", parameter.getMethod(), lookupPath);
if (!hasText(repositoryKey)) {
return null;
}
for (Class<?> domainType : repositories) {
ResourceMetadata mapping = mappings.getMetadataFor(domainType);
if (mapping.getPath().matches(repositoryKey) && mapping.isExported()) {
return mapping;
}
}
throw new IllegalArgumentException(String.format("Could not resolve repository metadata for %s.", repositoryKey));
}
}