nl.dtls.fairdatapoint.api.controller.MetadataController.java Source code

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Here is the source code for nl.dtls.fairdatapoint.api.controller.MetadataController.java

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package nl.dtls.fairdatapoint.api.controller;

import nl.dtls.fairdatapoint.service.FairMetadataServiceException;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import nl.dtls.fairdatapoint.api.controller.utils.HttpHeadersUtils;
import nl.dtls.fairdatapoint.api.controller.utils.LoggerUtils;
import nl.dtls.fairdatapoint.service.FairMetaDataService;
import org.apache.http.HttpHeaders;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.openrdf.rio.RDFFormat;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.beans.factory.annotation.Autowired;

@RestController
@Api(description = "FDP metadata")
@RequestMapping(value = "/")
public class MetadataController {
    private final static Logger LOGGER = LogManager.getLogger(MetadataController.class);
    @Autowired
    private FairMetaDataService fairMetaDataService;

    /**
     * To hander GET fdp metadata request.
     * (Note:) The first value in the produces annotation is used as a fallback
     * value, for the request with the accept header value (* / *),
     * manually setting the contentType of the response is not working.
     * 
     * @param request   Http request
     * @param response  Http response   
     * @return  On success return FDP metadata
     */
    @ApiOperation(value = "FDP metadata")
    @RequestMapping(method = RequestMethod.GET, produces = { "text/turtle", "application/ld+json",
            "application/rdf+xml", "text/n3" })
    public String getFDAMetaData(final HttpServletRequest request, HttpServletResponse response) {
        String responseBody;
        LOGGER.info("Request to get FDP metadata");
        LOGGER.info("GET : " + request.getRequestURL());
        String contentType = request.getHeader(HttpHeaders.ACCEPT);
        RDFFormat requesetedContentType = HttpHeadersUtils.getRequestedAcceptHeader(contentType);
        try {
            responseBody = fairMetaDataService.retrieveFDPMetaData(requesetedContentType);
            HttpHeadersUtils.set200ResponseHeaders(responseBody, response, requesetedContentType);
        } catch (FairMetadataServiceException ex) {
            responseBody = HttpHeadersUtils.set500ResponseHeaders(response, ex);
        }
        LoggerUtils.logRequest(LOGGER, request, response);
        return responseBody;
    }

    @ApiOperation(value = "Catalog metadata")
    @RequestMapping(value = "/{catalogID:[^.]+}", method = RequestMethod.GET, produces = { "text/turtle",
            "application/ld+json", "application/rdf+xml", "text/n3" })
    public String getCatalogMetaData(@PathVariable final String catalogID, HttpServletRequest request,
            HttpServletResponse response) {
        LOGGER.info("Request to get CATALOG metadata {}", catalogID);
        LOGGER.info("GET : " + request.getRequestURL());
        String responseBody;
        String contentType = request.getHeader(HttpHeaders.ACCEPT);
        RDFFormat requesetedContentType = HttpHeadersUtils.getRequestedAcceptHeader(contentType);
        try {
            responseBody = fairMetaDataService.retrieveCatalogMetaData(catalogID, requesetedContentType);
            HttpHeadersUtils.set200ResponseHeaders(responseBody, response, requesetedContentType);
        } catch (FairMetadataServiceException ex) {
            responseBody = HttpHeadersUtils.set500ResponseHeaders(response, ex);
        }
        LoggerUtils.logRequest(LOGGER, request, response);
        return responseBody;
    }

    @ApiOperation(value = "Dataset metadata")
    @RequestMapping(value = "/{catalogID}/{datasetID}", method = RequestMethod.GET, produces = { "text/turtle",
            "application/ld+json", "application/rdf+xml", "text/n3" })
    public String getDatasetMetaData(@PathVariable final String catalogID, @PathVariable final String datasetID,
            HttpServletRequest request, HttpServletResponse response) {
        LOGGER.info("Request to get DATASET metadata {}", catalogID);
        LOGGER.info("GET : " + request.getRequestURL());
        String responseBody;
        String contentType = request.getHeader(HttpHeaders.ACCEPT);
        RDFFormat requesetedContentType = HttpHeadersUtils.getRequestedAcceptHeader(contentType);
        try {
            responseBody = fairMetaDataService.retrieveDatasetMetaData(catalogID, datasetID, requesetedContentType);
            HttpHeadersUtils.set200ResponseHeaders(responseBody, response, requesetedContentType);
        } catch (FairMetadataServiceException ex) {
            responseBody = HttpHeadersUtils.set500ResponseHeaders(response, ex);
        }
        LoggerUtils.logRequest(LOGGER, request, response);
        return responseBody;
    }

}