com.nominanuda.springmvc.HandlerAdapterWrapper.java Source code

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Here is the source code for com.nominanuda.springmvc.HandlerAdapterWrapper.java

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/*
 * Copyright 2008-2011 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 com.nominanuda.springmvc;

import java.io.IOException;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.http.HttpEntity;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.springframework.web.servlet.ModelAndView;

import com.nominanuda.dataobject.DataObject;
import com.nominanuda.dataobject.DataObjectImpl;
import com.nominanuda.dataobject.DataStruct;
import com.nominanuda.dataobject.MapsAndListsObjectDecorator;
import com.nominanuda.lang.Check;
import com.nominanuda.web.http.ServletHelper;
import com.nominanuda.web.mvc.HandlerAdapter;
import com.nominanuda.web.mvc.PathAndJsonViewSpec;

public class HandlerAdapterWrapper implements org.springframework.web.servlet.HandlerAdapter {
    private static final ServletHelper servletHelper = new ServletHelper();
    private HandlerAdapter handlerAdapter;

    public boolean supports(Object handler) {
        return handlerAdapter.supports(handler);
    }

    public ModelAndView handle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        HttpRequest httpReq = servletHelper.getOrCreateRequest(request, true);
        DataStruct command = Check.ifNull(servletHelper.getCommand(request), new DataObjectImpl());
        Object result = handlerAdapter.invoke(handler, httpReq, command);
        servletHelper.storeHandlerOutput(request, result);
        //TODO delegate to DispatcherServletHelper ??
        if (result instanceof HttpResponse) {
            servletHelper.copyResponse((HttpResponse) result, response);
            return null;
        } else {
            return makeModelAndView(response, result);
        }
    }

    private ModelAndView makeModelAndView(HttpServletResponse response, Object result) throws IOException {
        //      if(result instanceof HttpResponse) {
        //         servletHelper.copyResponse((HttpResponse)result, response);
        //         return null;
        //      } else 
        if (result instanceof HttpEntity) {
            return new ModelAndView(new HttpEntityView((HttpEntity) result));
        } else if (result instanceof PathAndJsonViewSpec) {
            PathAndJsonViewSpec viewSpec = (PathAndJsonViewSpec) result;
            Map<String, ?> model = new MapsAndListsObjectDecorator((DataObject) viewSpec.getModel());
            return new ModelAndView(viewSpec.getPath(), model);
        } else {
            throw new IllegalStateException();
        }
    }

    public long getLastModified(HttpServletRequest request, Object handler) {
        return 0;
    }

    public void setHandlerAdapter(HandlerAdapter handlerAdapter) {
        this.handlerAdapter = handlerAdapter;
    }

}