How to use

getFacetOffset

method

in

org.dspace.discovery.DiscoverQuery

private String getNextPageURL(Request request) {
  Map<String, String> parameters = new HashMap<String, String>();
  parameters.put(FACET_FIELD, request.getParameter(FACET_FIELD));
  if (queryArgs.getFacetOffset() != -1)
  {
    parameters.put(OFFSET, String.valueOf(queryArgs.getFacetOffset() + DEFAULT_PAGE_SIZE));
  }
  // Add the filter queries
  String url = generateURL("browse-discovery", parameters);
  String[] fqs = getParameterFacetQueries();
  if (fqs != null) {
    StringBuilder urlBuilder = new StringBuilder(url);
    for (String fq : fqs) {
      urlBuilder.append("&fq=").append(fq);
    }
    url = urlBuilder.toString();
  }
  return url;
}

private String getPreviousPageURL(Request request) {
  //If our offset should be 0 then we shouldn't be able to view a previous page url
  if (0 == queryArgs.getFacetOffset())
  {
    return null;
  }
  Map<String, String> parameters = new HashMap<String, String>();
  parameters.put(FACET_FIELD, request.getParameter(FACET_FIELD));
  if (queryArgs.getFacetOffset() != -1)
  {
    parameters.put(OFFSET, String.valueOf(queryArgs.getFacetOffset() - DEFAULT_PAGE_SIZE));
  }
  // Add the filter queries
  String url = generateURL("browse-discovery", parameters);
  String[] fqs = getParameterFacetQueries();
  if (fqs != null) {
    StringBuilder urlBuilder = new StringBuilder(url);
    for (String fq : fqs) {
      urlBuilder.append("&fq=").append(fq);
    }
    url = urlBuilder.toString();
  }
  return url;
}

private String getPreviousPageURL(SearchFilterParam browseParams, Request request) {
  //If our offset should be 0 then we shouldn't be able to view a previous page url
  if (0 == queryArgs.getFacetOffset() && Util.getIntParameter(request, "offset") == -1)
  {
    return null;
  }
  int offset = Util.getIntParameter(request, SearchFilterParam.OFFSET);
  if(offset == -1 || offset == 0)
  {
    return null;
  }
  Map<String, String> parameters = new HashMap<String, String>();
  parameters.putAll(browseParams.getCommonBrowseParams());
  parameters.putAll(browseParams.getControlParameters());
  parameters.put(SearchFilterParam.OFFSET, String.valueOf(offset - DEFAULT_PAGE_SIZE));
  //TODO: correct  comm/collection url
  // Add the filter queries
  String url = generateURL("search-filter", parameters);
  url = addFilterQueriesToUrl(url);
  return url;
}

int offSet = queryArgs.getFacetOffset();
if(offSet == -1){
  offSet = 0;

int offSet = queryArgs.getFacetOffset();
if(offSet == -1){
  offSet = 0;

solrQuery.setParam(FacetParams.FACET_OFFSET, String.valueOf(discoveryQuery.getFacetOffset()));

solrQuery.setParam(FacetParams.FACET_OFFSET, String.valueOf(discoveryQuery.getFacetOffset()));