Examples with ListIdentifiersType org.openarchives.oai._2.ListIdentifiersType used on opensource projects

Example 1 with ListIdentifiersType

use of org.openarchives.oai._2.ListIdentifiersType in project mod-oai-pmh by folio-org.

the class GetOaiIdentifiersHelper method buildListIdentifiers.

/**
 * Builds {@link ListIdentifiersType} with headers if there is any item or {@code null}
 *
 * @param request           request
 * @param srsRecords the response from the storage which contains items
 * @return {@link ListIdentifiersType} with headers if there is any or {@code null}
 */
private OAIPMH buildListIdentifiers(Request request, JsonObject srsRecords) {
    ResponseHelper responseHelper = getResponseHelper();
    JsonArray instances = storageHelper.getItems(srsRecords);
    Integer totalRecords = storageHelper.getTotalRecords(srsRecords);
    if (request.isRestored() && !canResumeRequestSequence(request, totalRecords, instances)) {
        return responseHelper.buildOaipmhResponseWithErrors(request, BAD_RESUMPTION_TOKEN, RESUMPTION_TOKEN_FLOW_ERROR);
    }
    if (instances != null && !instances.isEmpty()) {
        logger.debug("{} entries retrieved out of {}.", instances.size(), totalRecords);
        ListIdentifiersType identifiers = new ListIdentifiersType().withResumptionToken(buildResumptionToken(request, instances, totalRecords));
        String identifierPrefix = request.getIdentifierPrefix();
        instances.stream().map(object -> (JsonObject) object).filter(instance -> StringUtils.isNotEmpty(storageHelper.getIdentifierId(instance))).filter(instance -> filterInstance(request, instance)).map(instance -> addHeader(identifierPrefix, request, instance)).forEach(identifiers::withHeaders);
        if (identifiers.getHeaders().isEmpty()) {
            OAIPMH oaipmh = responseHelper.buildBaseOaipmhResponse(request);
            return oaipmh.withErrors(createNoRecordsFoundError());
        }
        ResumptionTokenType resumptionToken = buildResumptionToken(request, instances, totalRecords);
        OAIPMH oaipmh = responseHelper.buildBaseOaipmhResponse(request).withListIdentifiers(identifiers);
        addResumptionTokenToOaiResponse(oaipmh, resumptionToken);
        return oaipmh;
    }
    return responseHelper.buildOaipmhResponseWithErrors(request, createNoRecordsFoundError());
}