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.util.StringTokenizer;

import java.util.Vector;

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.MetadataResponse;

import com.ibm.lsid.server.LSIDServerException;

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

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

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

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

/**

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

 * with a given lsid.

 *

 * @author ben

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

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

 */

@Controller

@Api(value="lsid_authority_metadata",

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

public class MetadataController {

    private LSIDMetadataService lsidMetadataService;

    @Autowired

    public void setLsidMetadataService(LSIDMetadataService lsidMetadataService) {

        this.lsidMetadataService = lsidMetadataService;

    }

    @InitBinder

    public void initBinder(WebDataBinder binder) {

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

    }

    /**

     * Handle requests for the metadata representation of an object with a given lsid. Will return metadata in any format supported

     * from a list of formats if specified.

     *

     * @param lsid the lsid to get metadata for

     * @param formats a comma separated list of acceptable formats to the client

     * @return ModelAndView containing the metadata response as an object with key 'metadataResponse', view name 'Metadata.rdf'

     * @throws LSIDServerException

     */

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

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

                                    @RequestParam(value = "acceptedFormats", required = false) String formats) throws LSIDServerException  {

        String[] acceptedFormats = null;

        if (formats != null) {

            StringTokenizer st = new StringTokenizer(formats,",",false);

            Vector<String> v = new Vector<String>();

            while (st.hasMoreTokens()) {

                v.add(st.nextToken());

            }

            acceptedFormats = new String[v.size()];

            v.toArray(acceptedFormats);

        }

        if (acceptedFormats != null) {

            boolean found = false;

            for (int i=0;i<acceptedFormats.length;i++) {

                    if (acceptedFormats[i].equals(MetadataResponse.RDF_FORMAT )) {

                        found = true;

                    }

                    break;

            }

            if (!found) {

                    throw new LSIDServerException(LSIDServerException.NO_METADATA_AVAILABLE_FOR_FORMATS,"No metadata found for given format");

            }

        }

        IIdentifiableEntity identifiableEntity = lsidMetadataService.getMetadata(lsid);

        ModelAndView modelAndView = new ModelAndView("Metadata.rdf");

        modelAndView.addObject(identifiableEntity);

        return modelAndView;

    }

    @RequestMapping(value = "/authority/metadata.do", params = "!lsid", method = RequestMethod.GET)

    public ModelAndView getMetadata() throws LSIDException {

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

    }

}