EDIT

// $Id$

/**

* Copyright (C) 2007 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.remote.service;

import io.swagger.annotations.Api;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.WebDataBinder;

import org.springframework.web.bind.annotation.InitBinder;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.servlet.ModelAndView;

import com.ibm.lsid.LSIDException;

import com.ibm.lsid.server.LSIDServerException;

import eu.etaxonomy.cdm.api.service.lsid.LSIDDataService;

import eu.etaxonomy.cdm.model.common.LSID;

import eu.etaxonomy.cdm.remote.editor.LSIDPropertyEditor;

/**

 * Controller which accepts requests for the data representation of an object

 * with a given lsid. The response is written directly into the request, rather

 * than being passed as part of the ModelAndView since data is supposed to be

 * byte-identical and thus cannot be transformed by the view layer.

 *

 * @author ben

 * @author Ben Szekely (<a href="mailto:bhszekel@us.ibm.com">bhszekel@us.ibm.com</a>)

 * @see com.ibm.lsid.server.servlet.DataServlet

 */

@Controller

@Api(value="lsid_authority_data",

description="Controller which accepts incoming requests to the LSIDDataService.")

public class DataController {

    private LSIDDataService lsidDataService;

    @Autowired

    public void setLsidDataService(LSIDDataService lsidDataService) {

        this.lsidDataService = lsidDataService;

    }

    @InitBinder

    public void initBinder(WebDataBinder binder) {

        binder.registerCustomEditor(LSID.class, new LSIDPropertyEditor());

    }

    /**

     * Handle requests for the data representation of an object with a given lsid. Can return only part of the

     * data if the length and offset are specified in the request as per the specification.

     *

     * @param LSID lsid the lsid to retrieve data for

     * @param Integer start the offset in bytes to read from

     * @param Integer length the number of bytes to return

     * @return ModelAndView (null)

     * @throws LSIDServerException

     * @throws IOException

     */

    @RequestMapping(value = "/authority/data.do",params = {"lsid","start","length"}, method = RequestMethod.GET)

    public ModelAndView getData(@RequestParam("lsid") LSID lsid,

                                @RequestParam("start") Integer start,

                                @RequestParam("length") Integer length,

                                HttpServletResponse response) throws LSIDServerException, IOException  {

        //FIXME #3811 fix null pointer access of "out" reference

//		OutputStream out = null;

//		InputStream data = null;

//		try {

//			data = lsidDataService.getDataByRange(lsid,start,length);

//		    if(data != null) {

//		    	response.setContentType("application/octet-stream");

//		    	byte[] bytes = new byte[1024];

//		    	int numbytes = data.read(bytes);

//		    	while (numbytes != -1) {

//		    		out.write(bytes,0,numbytes);

//		    		numbytes = data.read(bytes);

//		    	}

//		    	out.flush();

//		    }

//		} finally {

//			if (out != null) {

//				out.close();

//			}

//

//			if (data != null) {

//				data.close();

//			}

//		}

        return null;

    }

    /**

     * Handle requests for the data representation of an object with a given lsid.

     *

     * @param LSID lsid the lsid to retrieve data for

     * @return ModelAndView (null)

     * @throws LSIDServerException

     * @throws IOException

     */

    @RequestMapping(value = "/authority/data.do",params = {"lsid"}, method = RequestMethod.GET)

    public ModelAndView getData(@RequestParam("lsid")LSID lsid,

                                HttpServletResponse response) throws LSIDServerException, IOException  {

        OutputStream out = null;

        InputStream data = null;

        try {

            data = lsidDataService.getData(lsid);

            if(data != null) {

                response.setContentType("application/octet-stream");

                out = response.getOutputStream();

                byte[] bytes = new byte[1024];

                int numbytes = data.read(bytes);

                while (numbytes != -1) {

                    out.write(bytes,0,numbytes);

                    numbytes = data.read(bytes);

                }

                out.flush();

            }

        } finally {

            if (out != null) {

                out.close();

            }

            if (data != null) {

                data.close();

            }

        }

        return null;

    }

    /**

     * Handle requests for the data representation of an object without an lsid.

     *

     * @throws LSIDServerException

     */

    @RequestMapping(value = "/authority/data.do", method = RequestMethod.GET)

    public ModelAndView getData() throws LSIDException {

        throw new LSIDException(LSIDException.INVALID_METHOD_CALL, "Must specify HTTP Parameter 'lsid'");

    }

}