com.joyfulmongo.db.QueryConditionFilterGeoQuery.java Source code

Introduction

Here is the source code for com.joyfulmongo.db.QueryConditionFilterGeoQuery.java

Source

/*
 * Copyright 2014 Weifeng Bao
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
*/
package com.joyfulmongo.db;

import java.util.Iterator;

import org.json.JSONArray;
import org.json.JSONObject;

public class QueryConditionFilterGeoQuery implements QueryConditionFilter {
    public static final String S_KEY = "$nearSphere";

    public static void adjustConstraints(JSONObject constraints) {
        String geoPointKey = null;
        ContainerObjectGeoPoint geoPoint = null;

        Iterator<String> iter = constraints.keys();
        while (iter.hasNext()) {
            String constraintKey = iter.next();
            Object o = constraints.get(constraintKey);
            if (o instanceof JSONObject) {
                Object nearSphere = ((JSONObject) o).opt(S_KEY);
                if (nearSphere != null && nearSphere instanceof JSONObject) {
                    ContainerObject childObj = ContainerObjectFactory.getChildObject(S_KEY,
                            (JSONObject) nearSphere);
                    if (childObj instanceof ContainerObjectGeoPoint) {
                        geoPointKey = constraintKey;
                        geoPoint = (ContainerObjectGeoPoint) childObj;
                        break;
                    }
                }
            }
        }

        if (geoPointKey != null && geoPoint != null) {
            constraints.remove(geoPointKey);
            JSONArray geoArray = geoPoint.to2DArray();
            JSONObject nearSphereCondition = new JSONObject();
            nearSphereCondition.put(S_KEY, geoArray);
            constraints.put(ContainerObjectGeoPoint.S_GEO_POINT, nearSphereCondition);
        }
    }
}