/*
* 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.support;
import org.springframework.core.MethodParameter;
import org.springframework.data.domain.Pageable;
import org.springframework.data.web.PageableHandlerMethodArgumentResolver;
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 resolve {@link DefaultedPageable} if requested. Allows to find out whether
* the resolved {@link Pageable} is logically identical to the fallback on configured on the delegate
* {@link PageableHandlerMethodArgumentResolver}.
*
* @author Oliver Gierke
*/
public class DefaultedPageableHandlerMethodArgumentResolver implements HandlerMethodArgumentResolver {
private final PageableHandlerMethodArgumentResolver resolver;
/**
* Creates a new {@link DefaultedPageableHandlerMethodArgumentResolver} delegating to the given
* {@link PageableHandlerMethodArgumentResolver}.
*
* @param resolver must not be {@literal null}.
*/
public DefaultedPageableHandlerMethodArgumentResolver(PageableHandlerMethodArgumentResolver resolver) {
Assert.notNull(resolver, "PageableHandlerMethodArgumentResolver must not be null!");
this.resolver = resolver;
}
/*
* (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 Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
Pageable pageable = resolver.resolveArgument(parameter, mavContainer, webRequest, binderFactory);
return new DefaultedPageable(pageable, resolver.isFallbackPageable(pageable));
}
/*
* (non-Javadoc)
* @see org.springframework.web.method.support.HandlerMethodArgumentResolver#supportsParameter(org.springframework.core.MethodParameter)
*/
@Override
public boolean supportsParameter(MethodParameter parameter) {
return DefaultedPageable.class.isAssignableFrom(parameter.getParameterType());
}
}