appmonk.tricks.JsonTricks.java Source code

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Here is the source code for appmonk.tricks.JsonTricks.java

Source

package appmonk.tricks;

/*
 * Copyright (C) 2009, 2010 Sebastian Delmont <sd@notso.net>
 * 
 * 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 andlimitations under the License.
 * 
 */

import java.util.Calendar;

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

public class JsonTricks {
    public static String getString(JSONObject json, String... path) {
        if (path.length > 1) {
            json = getJSONObject(json, path, 0, path.length - 1);
        }
        if (json != null) {
            return json.optString(path[path.length - 1]);
        }
        return null;
    }

    public static long getLong(JSONObject json, long defaultValue, String... path) {
        if (path.length > 1) {
            json = getJSONObject(json, path, 0, path.length - 1);
        }
        if (json != null) {
            return json.optLong(path[path.length - 1], defaultValue);
        }
        return defaultValue;
    }

    public static boolean getBoolean(JSONObject json, String... path) {
        return getBoolean(json, false, path);
    }

    public static boolean getBoolean(JSONObject json, boolean defaultValue, String... path) {
        if (path.length > 1) {
            json = getJSONObject(json, path, 0, path.length - 1);
        }
        if (json != null) {
            return json.optBoolean(path[path.length - 1], defaultValue);
        }
        return defaultValue;
    }

    public static Calendar getTime(JSONObject json, String... path) {
        String timeString = getString(json, path);
        if (timeString != null) {
            return TimeTricks.isoStringToCalendar(timeString, null);
        }

        return null;
    }

    public static Calendar getIsoTime(JSONObject json, String... path) {
        String timeString = getString(json, path);
        if (timeString != null) {
            return TimeTricks.isoStringToCalendar(timeString, null);
        }

        return null;
    }

    public static long getIsoTimeInMillis(JSONObject json, String... path) {
        String timeString = getString(json, path);
        if (timeString != null) {
            Calendar cal = TimeTricks.isoStringToCalendar(timeString, null);
            if (cal != null) {
                return cal.getTimeInMillis();
            }
        }

        return -1;
    }

    public static JSONArray getJSONArray(JSONObject json, String... path) {
        if (path.length > 1) {
            json = getJSONObject(json, path, 0, path.length - 1);
        }
        if (json != null) {
            return json.optJSONArray(path[path.length - 1]);
        }
        return null;
    }

    public static JSONObject getJSONObject(JSONObject json, String... path) {
        return getJSONObject(json, path, 0, path.length);
    }

    protected static JSONObject getJSONObject(JSONObject json, String[] path, int start, int length) {
        if (start >= length)
            return json;

        while (start < length) {
            if (json == null)
                break;
            else
                json = json.optJSONObject(path[start]);
            start++;
        }
        return json;
    }
}