Ejemplo n.º 1
0
  /**
   * Setup the basic query arguments: the main query and all the filters (default + user). Return
   * the list of user filter
   *
   * @param context
   * @param request
   * @param queryArgs the query object to populate
   * @return the list of user filer (as filter query)
   */
  private static List<String> setupBasicQuery(
      Context context,
      DiscoveryConfiguration discoveryConfiguration,
      HttpServletRequest request,
      DiscoverQuery queryArgs) {
    // Get the query
    String query = request.getParameter("query");
    if (StringUtils.isNotBlank(query)) {
      queryArgs.setQuery(query);
    }

    List<String> defaultFilterQueries = discoveryConfiguration.getDefaultFilterQueries();
    if (defaultFilterQueries != null) {
      for (String f : defaultFilterQueries) {
        queryArgs.addFacetQuery(f);
      }
    }
    List<String[]> filters = getFilters(request);
    List<String> userFilters = new ArrayList<String>();
    for (String[] f : filters) {
      try {
        String newFilterQuery =
            SearchUtils.getSearchService()
                .toFilterQuery(context, f[0], f[1], f[2])
                .getFilterQuery();
        if (newFilterQuery != null) {
          queryArgs.addFilterQueries(newFilterQuery);
          userFilters.add(newFilterQuery);
        }
      } catch (SQLException e) {
        log.error(
            LogManager.getHeader(
                context,
                "Error in discovery while setting up user facet query",
                "filter_field: " + f[0] + ",filter_type:" + f[1] + ",filer_value:" + f[2]),
            e);
      }
    }

    return userFilters;
  }
Ejemplo n.º 2
0
  private static void setFacet(
      Context context,
      HttpServletRequest request,
      DSpaceObject scope,
      DiscoverQuery queryArgs,
      DiscoveryConfiguration discoveryConfiguration,
      List<String> userFilters) {
    List<DiscoverySearchFilterFacet> facets = discoveryConfiguration.getSidebarFacets();

    log.info("facets for scope, " + scope + ": " + (facets != null ? facets.size() : null));
    if (facets != null) {
      queryArgs.setFacetMinCount(1);
    }

    /** enable faceting of search results */
    if (facets != null) {
      queryArgs.setFacetMinCount(1);
      for (DiscoverySearchFilterFacet facet : facets) {
        if (facet.getType().equals(DiscoveryConfigurationParameters.TYPE_DATE)) {
          String dateFacet = facet.getIndexFieldName() + ".year";
          List<String> filterQueriesList = queryArgs.getFilterQueries();
          String[] filterQueries = new String[0];
          if (filterQueriesList != null) {
            filterQueries = new String[filterQueries.length];
            filterQueries = filterQueriesList.toArray(filterQueries);
          }
          try {
            // Get a range query so we can create facet
            // queries
            // ranging from out first to our last date
            // Attempt to determine our oldest & newest year
            // by
            // checking for previously selected filters
            int oldestYear = -1;
            int newestYear = -1;

            for (String filterQuery : filterQueries) {
              if (filterQuery.startsWith(dateFacet + ":")) {
                // Check for a range
                Pattern pattern = Pattern.compile("\\[(.*? TO .*?)\\]");
                Matcher matcher = pattern.matcher(filterQuery);
                boolean hasPattern = matcher.find();
                if (hasPattern) {
                  filterQuery = matcher.group(0);
                  // We have a range
                  // Resolve our range to a first &
                  // endyear
                  int tempOldYear =
                      Integer.parseInt(filterQuery.split(" TO ")[0].replace("[", "").trim());
                  int tempNewYear =
                      Integer.parseInt(filterQuery.split(" TO ")[1].replace("]", "").trim());

                  // Check if we have a further filter
                  // (or
                  // a first one found)
                  if (tempNewYear < newestYear || oldestYear < tempOldYear || newestYear == -1) {
                    oldestYear = tempOldYear;
                    newestYear = tempNewYear;
                  }

                } else {
                  if (filterQuery.indexOf(" OR ") != -1) {
                    // Should always be the case
                    filterQuery = filterQuery.split(" OR ")[0];
                  }
                  // We should have a single date
                  oldestYear = Integer.parseInt(filterQuery.split(":")[1].trim());
                  newestYear = oldestYear;
                  // No need to look further
                  break;
                }
              }
            }
            // Check if we have found a range, if not then
            // retrieve our first & last year by using solr
            if (oldestYear == -1 && newestYear == -1) {

              DiscoverQuery yearRangeQuery = new DiscoverQuery();
              yearRangeQuery.setFacetMinCount(1);
              yearRangeQuery.setMaxResults(1);
              // Set our query to anything that has this
              // value
              yearRangeQuery.addFieldPresentQueries(dateFacet);
              // Set sorting so our last value will appear
              // on
              // top
              yearRangeQuery.setSortField(dateFacet + "_sort", DiscoverQuery.SORT_ORDER.asc);
              yearRangeQuery.addFilterQueries(filterQueries);
              yearRangeQuery.addSearchField(dateFacet);
              DiscoverResult lastYearResult =
                  SearchUtils.getSearchService().search(context, scope, yearRangeQuery);

              if (0 < lastYearResult.getDspaceObjects().size()) {
                java.util.List<DiscoverResult.SearchDocument> searchDocuments =
                    lastYearResult.getSearchDocument(lastYearResult.getDspaceObjects().get(0));
                if (0 < searchDocuments.size()
                    && 0 < searchDocuments.get(0).getSearchFieldValues(dateFacet).size()) {
                  oldestYear =
                      Integer.parseInt(
                          searchDocuments.get(0).getSearchFieldValues(dateFacet).get(0));
                }
              }
              // Now get the first year
              yearRangeQuery.setSortField(dateFacet + "_sort", DiscoverQuery.SORT_ORDER.desc);
              DiscoverResult firstYearResult =
                  SearchUtils.getSearchService().search(context, scope, yearRangeQuery);
              if (0 < firstYearResult.getDspaceObjects().size()) {
                java.util.List<DiscoverResult.SearchDocument> searchDocuments =
                    firstYearResult.getSearchDocument(firstYearResult.getDspaceObjects().get(0));
                if (0 < searchDocuments.size()
                    && 0 < searchDocuments.get(0).getSearchFieldValues(dateFacet).size()) {
                  newestYear =
                      Integer.parseInt(
                          searchDocuments.get(0).getSearchFieldValues(dateFacet).get(0));
                }
              }
              // No values found!
              if (newestYear == -1 || oldestYear == -1) {
                continue;
              }
            }

            int gap = 1;
            // Attempt to retrieve our gap by the algorithm
            // below
            int yearDifference = newestYear - oldestYear;
            if (yearDifference != 0) {
              while (10 < ((double) yearDifference / gap)) {
                gap *= 10;
              }
            }
            // We need to determine our top year so we can
            // start
            // our count from a clean year
            // Example: 2001 and a gap from 10 we need the
            // following result: 2010 - 2000 ; 2000 - 1990
            // hence
            // the top year
            int topYear = (int) (Math.ceil((float) (newestYear) / gap) * gap);

            if (gap == 1) {
              // We need a list of our years
              // We have a date range add faceting for our
              // field
              // The faceting will automatically be
              // limited to
              // the 10 years in our span due to our
              // filterquery
              queryArgs.addFacetField(
                  new DiscoverFacetField(
                      facet.getIndexFieldName(), facet.getType(), 10, facet.getSortOrder()));
            } else {
              java.util.List<String> facetQueries = new ArrayList<String>();
              // Create facet queries but limit then to 11
              // (11
              // == when we need to show a show more url)
              for (int year = topYear - gap;
                  year > oldestYear && (facetQueries.size() < 11);
                  year -= gap) {
                // Add a filter to remove the last year
                // only
                // if we aren't the last year
                int bottomYear = year - gap;
                // Make sure we don't go below our last
                // year
                // found
                if (bottomYear < oldestYear) {
                  bottomYear = oldestYear;
                }

                // Also make sure we don't go above our
                // newest year
                int currentTop = year;
                if ((year == topYear)) {
                  currentTop = newestYear;
                } else {
                  // We need to do -1 on this one to
                  // get a
                  // better result
                  currentTop--;
                }
                facetQueries.add(dateFacet + ":[" + bottomYear + " TO " + currentTop + "]");
              }
              for (String facetQuery : facetQueries) {
                queryArgs.addFacetQuery(facetQuery);
              }
            }
          } catch (Exception e) {
            log.error(
                LogManager.getHeader(
                    context,
                    "Error in discovery while setting up date facet range",
                    "date facet: " + dateFacet),
                e);
          }
        } else {
          int facetLimit = facet.getFacetLimit();

          int facetPage = UIUtil.getIntParameter(request, facet.getIndexFieldName() + "_page");
          if (facetPage < 0) {
            facetPage = 0;
          }
          // at most all the user filters belong to this facet
          int alreadySelected = userFilters.size();

          // Add one to our facet limit to make sure that if
          // we
          // have more then the shown facets that we show our
          // show
          // more url
          // add the already selected facet so to have a full
          // top list
          // if possible
          queryArgs.addFacetField(
              new DiscoverFacetField(
                  facet.getIndexFieldName(),
                  DiscoveryConfigurationParameters.TYPE_TEXT,
                  facetLimit + 1 + alreadySelected,
                  facet.getSortOrder(),
                  facetPage * facetLimit));
        }
      }
    }
  }
Ejemplo n.º 3
0
  private static void setPagination(
      HttpServletRequest request,
      DiscoverQuery queryArgs,
      DiscoveryConfiguration discoveryConfiguration) {
    int start = UIUtil.getIntParameter(request, "start");
    // can't start earlier than 0 in the results!
    if (start < 0) {
      start = 0;
    }

    String sortBy = request.getParameter("sort_by");
    String sortOrder = request.getParameter("order");

    DiscoverySortConfiguration searchSortConfiguration =
        discoveryConfiguration.getSearchSortConfiguration();
    if (sortBy == null) {
      // Attempt to find the default one, if none found we use SCORE
      sortBy = "score";
      if (searchSortConfiguration != null) {
        for (DiscoverySortFieldConfiguration sortFieldConfiguration :
            searchSortConfiguration.getSortFields()) {
          if (sortFieldConfiguration.equals(searchSortConfiguration.getDefaultSort())) {
            sortBy =
                SearchUtils.getSearchService()
                    .toSortFieldIndex(
                        sortFieldConfiguration.getMetadataField(),
                        sortFieldConfiguration.getType());
          }
        }
      }
    }

    if (sortOrder == null && searchSortConfiguration != null) {
      sortOrder = searchSortConfiguration.getDefaultSortOrder().toString();
    }
    if (sortBy != null) {
      if ("asc".equalsIgnoreCase(sortOrder)) {
        queryArgs.setSortField(sortBy, SORT_ORDER.asc);
      } else {
        queryArgs.setSortField(sortBy, SORT_ORDER.desc);
      }
    }

    int rpp = UIUtil.getIntParameter(request, "rpp");
    // Override the page setting if exporting metadata
    if ("submit_export_metadata".equals(UIUtil.getSubmitButton(request, "submit"))) {
      queryArgs.setStart(0);
      queryArgs.setMaxResults(Integer.MAX_VALUE);
      // search only for items other objects are not exported
      queryArgs.addFilterQueries("search.resourcetype:2");
    } else {
      // String groupBy = request.getParameter("group_by");
      //
      // // Enable groupBy collapsing if designated
      // if (groupBy != null && !groupBy.equalsIgnoreCase("none")) {
      // /** Construct a Collapse Field Query */
      // queryArgs.addProperty("collapse.field", groupBy);
      // queryArgs.addProperty("collapse.threshold", "1");
      // queryArgs.addProperty("collapse.includeCollapsedDocs.fl",
      // "handle");
      // queryArgs.addProperty("collapse.facet", "before");
      //
      // //queryArgs.a type:Article^2
      //
      // // TODO: This is a hack to get Publications (Articles) to always
      // be at the top of Groups.
      // // TODO: I think the can be more transparently done in the solr
      // solrconfig.xml with DISMAX and boosting
      // /** sort in groups to get publications to top */
      // queryArgs.setSortField("dc.type", DiscoverQuery.SORT_ORDER.asc);
      //
      // }

      if (rpp > 0) {
        queryArgs.setMaxResults(rpp);
      } else {
        queryArgs.setMaxResults(discoveryConfiguration.getDefaultRpp());
      }
      queryArgs.setStart(start);
    }
  }