net.eusashead.hateoas.response.impl.PageWebConfig.java Source code

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Here is the source code for net.eusashead.hateoas.response.impl.PageWebConfig.java

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package net.eusashead.hateoas.response.impl;

/*
 * #[license]
 * spring-halbuilder
 * %%
 * Copyright (C) 2013 Eusa's Head
 * %%
 * 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.
 * %[license]
 */

import java.util.List;

import net.eusashead.hateoas.hal.http.converter.HalHttpMessageConverter;
import net.eusashead.hateoas.hal.response.impl.HalPageResponseBuilderHandlerMethodArgumentResolver;
import net.eusashead.hateoas.response.argumentresolver.ResponseBuilderMethodArgumentResolver;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.web.PageableHandlerMethodArgumentResolver;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import com.theoryinpractise.halbuilder.DefaultRepresentationFactory;
import com.theoryinpractise.halbuilder.api.RepresentationFactory;
import com.theoryinpractise.halbuilder.standard.StandardRepresentationFactory;

@Configuration
@ComponentScan(basePackageClasses = HalPageResponseBuilderController.class)
public class PageWebConfig extends WebMvcConfigurationSupport {

    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        // Add the HAL converter
        converters.add(halConverter());
    }

    /**
     * Create a {@link HalHttpMessageConverter}
     * using the {@link DefaultRepresentationFactory}
     * @return
     */
    @Bean
    public HttpMessageConverter<Object> halConverter() {
        RepresentationFactory factory = representationFactory();
        HalHttpMessageConverter converter = new HalHttpMessageConverter(factory);
        return converter;
    }

    @Bean
    public RepresentationFactory representationFactory() {
        return new StandardRepresentationFactory();
    }

    /**
     * Set up a {@link PageableHandlerMethodArgumentResolver}
     * to automatically extract paging parameters from a
     * request
     * @return
     */
    @Bean
    public PageableHandlerMethodArgumentResolver pageableResolver() {
        PageableHandlerMethodArgumentResolver pageArgResolver = new PageableHandlerMethodArgumentResolver();
        Pageable fallback = new PageRequest(0, 20);
        pageArgResolver.setFallbackPageable(fallback);
        return pageArgResolver;
    }

    @Override
    protected void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
        argumentResolvers.add(new ResponseBuilderMethodArgumentResolver());
        argumentResolvers
                .add(new HalPageResponseBuilderHandlerMethodArgumentResolver(representationFactory(), "page"));
        argumentResolvers.add(pageableResolver());
        super.addArgumentResolvers(argumentResolvers);
    }
}