Method getFiterFeatures

src/openlayers/mapping/WebMap.js:3161–3183

* @private * @function WebMap.prototype.getFiterFeatures * @description 通过过滤条件查询满足的feature * @param {string} filterCondition - 过滤条件 * @param {Array} allFeatures - 图层上的feature集合

(filterCondition, allFeatures)

   * @param {Array} allFeatures - 图层上的feature集合
   */
  getFiterFeatures(filterCondition, allFeatures) {
    let condition = this.parseFilterCondition(filterCondition);
    let filterFeatures = [];
    for (let i = 0; i < allFeatures.length; i++) {
      let feature = allFeatures[i];
      let filterResult = false;
      try {
        const properties = feature.get('attributes');
        const conditions = parseCondition(condition, Object.keys(properties));
        const filterFeature = parseConditionFeature(properties);
        const sql = 'select * from json where (' + conditions + ')';
        filterResult = window.jsonsql.query(sql, { attributes: filterFeature });
      } catch (err) {
        //必须把要过滤得内容封装成一个对象,主要是处理jsonsql(line : 62)中由于with语句遍历对象造成的问题
        continue;
      }
      if (filterResult && filterResult.length > 0) {
        //afterFilterFeatureIdx.push(i);
        filterFeatures.push(feature);
      }
    }
    return filterFeatures;
  }

  /**
   * @private