--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/facetapi/query_type_numeric_range.inc	Mon Jun 08 10:21:54 2015 +0200
@@ -0,0 +1,102 @@
+<?php
+
+/**
+ * @file
+ * Numeric range query type plugin for the Apache Solr adapter.
+ */
+
+/**
+ * Plugin for "numeric_range" query types.
+ */
+class solrsearchFacetapiNumericRange extends FacetapiQueryType implements FacetapiQueryTypeInterface {
+
+  private $single_key;
+  /**
+   * Returns the query type associated with the plugin.
+   *
+   * @return string
+   *   The query type.
+   */
+  static public function getType() {
+    return 'numeric_range';
+  }
+
+  /**
+   * Adds the filter to the query object.
+   *
+   * @param DrupalSolrQueryInterface $query
+   *   An object containing the query in the backend's native API.
+   * @todo Cache the values based on the filter query or any other way?
+   */
+  public function execute($query) {
+    // Check if we have a cache of this field
+    //
+    $settings = $this->adapter->getFacet($this->facet)->getSettings();
+    $active = $this->adapter->getActiveItems($this->facet);
+
+    $singular_field_info = $this->facet['map options'];
+    $singular_field_info['multiple'] = FALSE;
+
+    $this->single_key = solrsearch_index_key($singular_field_info);
+    // See:  http://wiki.apache.org/solr/StatsComponent
+    $query->addParam('stats', 'true');
+    $query->addParam('stats.field', $this->single_key);
+    $query->addParam('stats.facet', $this->single_key);
+    // Range filters don't support OR operator.
+    foreach ($active as $value => $item) {
+      $query->addFilter($this->single_key, $value);
+    }
+  }
+
+  /**
+   * Initializes the facet's build array.
+   *
+   * Any calls to this method need to be wrapped in a try-catch block.
+   *
+   * @return array
+   *   The initialized render array.
+   */
+  public function build() {
+    $build = array();
+    if (!isset($this->single_key)) {
+      return $build;
+    }
+
+    // Per key we save our statistics result
+    $cache = cache_get('stats_' . $this->single_key, 'cache_solrsearch');
+    $stats_minmax = array();
+
+    if (!isset($cache->data)) {
+      // we need an additional query for the statistics of the field
+      // We can optionally specify a Solr object.
+      $solr = solrsearch_get_solr();
+
+      // We possibly need some caching for this query
+      $query_stats = solrsearch_drupal_query('solrsearch_stats', array(), '', '', $solr);
+      $query_stats->addParam('stats', 'true');
+      $query_stats->addParam('stats.field', $this->single_key);
+      $query_stats->addParam('stats.facet', $this->single_key);
+      $response_stats = $query_stats->search();
+
+      if ($response_stats->response) {
+        $stats_minmax = $response_stats->stats->stats_fields->{$this->single_key};
+        cache_set('stats_' . $this->single_key, $stats_minmax, 'cache_solrsearch');
+      }
+    }
+    else {
+      // Set our statistics from the cache
+      $stats_minmax = $cache->data;
+    }
+
+    if ($response = solrsearch_static_response_cache($this->adapter->getSearcher())) {
+      if (isset($response->stats->stats_fields->{$this->single_key})) {
+        $stats = (array) $response->stats->stats_fields->{$this->single_key};
+        foreach ($stats as $key => $val) {
+          $build[$this->facet['field']]['#range_' . $key] = $val;
+          $build[$this->facet['field']]['#global_range_' . $key] = $stats_minmax->$key;
+        }
+      }
+    }
+    return $build;
+  }
+}