001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.wicket.ajax.json;
018
019import java.util.List;
020import java.util.Map;
021
022import com.github.openjson.JSONArray;
023import com.github.openjson.JSONException;
024import com.github.openjson.JSONObject;
025
026/**
027 * @since 6.0.0
028 */
029public final class JsonUtils
030{
031        private JsonUtils()
032        {}
033
034        /**
035         * Converts a Map to JSONArray suitable for jQuery#param().
036         *
037         * @param map
038         *      the map with key/value(s)
039         * @return a JSONArray that contains JSONObject's with name/value pairs
040         * @throws JSONException
041         */
042        public static JSONArray asArray(Map<String, Object> map) throws JSONException
043        {
044                JSONArray jsonArray = new JSONArray();
045
046                if (map != null)
047                {
048                        for (Map.Entry<String, Object> entry : map.entrySet())
049                        {
050                                String name = entry.getKey();
051                                Object value = entry.getValue();
052                                if (value instanceof List) {
053                                        List<?> values = (List<?>) value;
054                                        for (Object v : values)
055                                        {
056                                                if (v != null)
057                                                {
058                                                        JSONObject object = new JSONObject();
059                                                        object.put("name", name);
060                                                        object.put("value", v);
061                                                        jsonArray.put(object);
062                                                }
063                                        }
064                                }
065                                else if (value != null)
066                                {
067                                        if (value.getClass().isArray())
068                                        {
069                                                Object[] array = (Object[]) value;
070                                                for (Object v : array)
071                                                {
072                                                        if (v != null)
073                                                        {
074                                                                JSONObject object = new JSONObject();
075                                                                object.put("name", name);
076                                                                object.put("value", v);
077                                                                jsonArray.put(object);
078                                                        }
079                                                }
080                                        }
081                                        else
082                                        {
083                                                JSONObject object = new JSONObject();
084                                                object.put("name", name);
085                                                object.put("value", value);
086                                                jsonArray.put(object);
087                                        }
088                                }
089                        }
090                }
091
092                return jsonArray;
093        }
094}