com.joyfulmongo.db.javadriver.JFDBUtil.java Source code

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Here is the source code for com.joyfulmongo.db.javadriver.JFDBUtil.java

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/*
 * 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.javadriver;

import java.text.DateFormat;
import java.util.Date;
import java.util.Iterator;
import java.util.logging.Logger;
import java.util.logging.Level;

import org.bson.types.ObjectId;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import com.joyfulmongo.db.Utils;
import com.mongodb.BasicDBList;
import com.mongodb.BasicDBObject;
import com.mongodb.DBObject;

public class JFDBUtil {
    private static Logger LOGGER = Logger.getLogger(JFDBUtil.class.getName());

    public static DBObject toDBObject(JSONArray a) {
        BasicDBList result = new BasicDBList();
        try {
            for (int i = 0; i < a.length(); ++i) {
                Object o = a.get(i);
                if (o instanceof JSONObject) {
                    result.add(toDBObject((JSONObject) o));
                } else if (o instanceof JSONArray) {
                    result.add(toDBObject((JSONArray) o));
                } else {
                    result.add(o);
                }
            }
            return result;
        } catch (JSONException je) {
            throw new IllegalArgumentException("Failed to pass the income JSONArray to DBObject" + a, je);
        }
    }

    public static DBObject toDBObject(JSONObject o) {
        BasicDBObject result = new BasicDBObject();
        try {
            Iterator<String> i = o.keys();
            while (i.hasNext()) {
                String k = (String) i.next();
                Object v = o.get(k);
                if (v instanceof JSONArray) {
                    result.put(k, toDBObject((JSONArray) v));
                } else if (v instanceof JSONObject) {
                    result.put(k, toDBObject((JSONObject) v));
                } else {
                    result.put(k, v);
                }
            }
            return result;
        } catch (JSONException je) {
            throw new IllegalArgumentException("Failed to pass the income jsonObject to DBObject" + o, je);
        }
    }

    public static JSONObject toJSONObject(DBObject o) {
        JSONObject result = new JSONObject();

        try {
            Iterator<String> i = o.keySet().iterator();
            while (i.hasNext()) {
                String k = (String) i.next();
                Object v = o.get(k);
                if (LOGGER.isLoggable(Level.FINE)) {
                    LOGGER.log(Level.FINE, "toJSON Key=[" + k + "]=[" + v + "] " + v.getClass());
                }

                if (v instanceof BasicDBList) {
                    result.put(k, toJSONArray((BasicDBList) v));
                } else if (v instanceof DBObject) {
                    DBObject dv = (DBObject) v;
                    String op = (String) dv.get("__op");
                    if (op != null) {
                        Object objs = dv.get("objects");
                        if (objs == null) {
                            // ignore
                        } else if (objs instanceof BasicDBList) {
                            JSONArray jarray = toJSONArray((BasicDBList) objs);
                            result.put(k, jarray);
                        } else {
                            result.put(k, toJSONObject((DBObject) objs));
                        }
                    } else {
                        result.put(k, toJSONObject((DBObject) v));
                    }
                } else if (v instanceof ObjectId) {
                    // ignore the mongo objectId;
                } else if (v instanceof Date) {
                    DateFormat format = Utils.getParseDateFormat();
                    result.put(k, format.format((Date) v));
                } else {
                    result.put(k, v);
                }
            }
            return result;
        } catch (JSONException je) {
            return null;
        }
    }

    public static JSONArray toJSONArray(BasicDBList list) {
        JSONArray array = new JSONArray();

        for (int i = 0; i < list.size(); i++) {
            Object o = list.get(i);
            if (o instanceof BasicDBList) {
                JSONArray subarray = toJSONArray((BasicDBList) o);
                array.put(subarray);
            } else if (o instanceof DBObject) {
                JSONObject json = toJSONObject((DBObject) o);
                array.put(json);
            } else {
                array.put(o);
            }
        }

        return array;
    }
}