facesviewresolver.java

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/*
 * Copyright 2002-2004 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 de.mindmatters.faces.spring.context.servlet;

import java.util.Locale;

import javax.faces.context.FacesContext;

import org.springframework.util.Assert;
import org.springframework.web.servlet.View;
import org.springframework.web.servlet.view.UrlBasedViewResolver;

/**
 * Convenience subclass of UrlBasedViewResolver that supports {@link FacesView}.
 * 
 * @author Andreas Kuhrwahl
 * 
 * @see org.springframework.web.servlet.view.UrlBasedViewResolver
 *      #createView(java.lang.String, java.util.Locale)
 * @see #setViewClass
 * 
 */
public class FacesViewResolver extends UrlBasedViewResolver {

    /**
     * Sets default viewClass to AbstractFacesView.
     * 
     * @see #setViewClass
     */
    public FacesViewResolver() {
        super();
        setViewClass(requiredViewClass());
    }

    /**
     * {@inheritDoc}
     */
    protected final Class requiredViewClass() {
        return FacesView.class;
    }

    /**
     * {@inheritDoc}
     */
    protected final View createView(final String viewName, final Locale locale)
            throws Exception {
        View createdView = super.createView(viewName, locale);
        if (!requiredViewClass().isAssignableFrom(createdView.getClass())) {
            FacesContext context = FacesContext.getCurrentInstance();
            Assert.notNull(context);
            context.renderResponse();
        }
        return createdView;
    }

}