com.asual.summer.core.spring.ViewResolverConfiguration.java Source code

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Here is the source code for com.asual.summer.core.spring.ViewResolverConfiguration.java

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/*
 * 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 com.asual.summer.core.spring;

import java.util.Collection;
import java.util.List;
import java.util.Locale;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.http.MediaType;
import org.springframework.web.HttpMediaTypeNotAcceptableException;
import org.springframework.web.accept.ContentNegotiationManager;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.servlet.View;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.view.AbstractView;
import org.springframework.web.servlet.view.ContentNegotiatingViewResolver;

import com.asual.summer.core.ViewNotFoundException;

/**
 * 
 * @author Rostislav Hristov
 *
 */
public class ViewResolverConfiguration extends ContentNegotiatingViewResolver {

    private Log logger = LogFactory.getLog(ViewResolverConfiguration.class);

    private ContentNegotiationManager contentNegotiationManager;

    private List<ViewResolver> viewResolvers;

    public void setContentNegotiationManager(ContentNegotiationManager contentNegotiationManager) {
        this.contentNegotiationManager = contentNegotiationManager;
        super.setContentNegotiationManager(contentNegotiationManager);
    }

    public List<ViewResolver> getViewResolvers() {
        return viewResolvers;
    }

    public void setViewResolvers(List<ViewResolver> viewResolvers) {
        this.viewResolvers = viewResolvers;
        super.setViewResolvers(viewResolvers);
    }

    public View resolveViewName(String viewName, Locale locale) throws Exception {
        View view = super.resolveViewName(viewName, locale);
        if (view == null) {
            throw new ViewNotFoundException();
        }
        return view;
    }

    public AbstractView handleViews(Collection<AbstractView> views, NativeWebRequest request) {
        List<MediaType> requestedMediaTypes;
        try {
            requestedMediaTypes = contentNegotiationManager.resolveMediaTypes(request);
            for (MediaType requestedMediaType : requestedMediaTypes) {
                for (AbstractView view : views) {
                    MediaType producableMediaType = MediaType.parseMediaType(view.getContentType());
                    if (requestedMediaType.isCompatibleWith(producableMediaType)
                            && !requestedMediaType.isWildcardType() && requestedMediaType.getQualityValue() > 0.9) {
                        return view;
                    }
                }

            }
        } catch (HttpMediaTypeNotAcceptableException e) {
            logger.debug(e.getMessage(), e);
        }
        return null;
    }

}