Added JsonHelper class to convert Java/JSON

com.eclipsesource.json/src/main/java/com/eclipsesource/json/JsonHelper.java

@@ -0,0 +1,105 @@
+/*******************************************************************************
+ * Copyright (c) 2013, 2015 EclipseSource.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ ******************************************************************************/
+package com.eclipsesource.json;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.Map.Entry;
+
+import com.eclipsesource.json.Json;
+import com.eclipsesource.json.JsonArray;
+import com.eclipsesource.json.JsonObject;
+import com.eclipsesource.json.JsonValue;
+
+public class JsonHelper {
+ public static Object jsonValueAsObject(JsonValue value) {
+ if(value.isBoolean())
+ return value.asBoolean();
+ else if(value.isNumber())
+ return value.asInt();
+ else if(value.isString())
+ return value.asString();
+ else if(value.isArray())
+ return jsonArrayAsList(value.asArray());
+ else if(value.isObject())
+ return jsonObjectAsMap(value.asObject());
+ else return null;
+ }
+ public static Set<Object> jsonArrayAsSet(JsonArray array) {
+ Set<Object> set = new HashSet<Object>();
+ for(JsonValue value:array)
+ set.add(jsonValueAsObject(value));
+ return set;
+ }
+ public static List<Object> jsonArrayAsList(JsonArray array) {
+ List<Object> list = new ArrayList<Object>(array.size());
+ for(JsonValue element:array)
+ list.add(jsonValueAsObject(element));
+ return list;
+ }
+ public static Map<String,Object> jsonObjectAsMap(JsonObject object) {
+ Map<String,Object> map = new HashMap<String,Object>(object.size(), 1.f);
+ for(JsonObject.Member member:object)
+ map.put(member.getName(), jsonValueAsObject(member.getValue()));
+ return map; 
+ }
+
+ public static JsonValue objectAsJsonValue(Object object) {
+ if(object==null)
+ return Json.NULL;
+ else if(object instanceof Boolean)
+ return Json.value((Boolean)object);
+ else if(object instanceof Integer)
+ return Json.value((Integer)object);
+ else if(object instanceof Long)
+ return Json.value((Long)object);
+ else if(object instanceof Float)
+ return Json.value((Float)object);
+ else if(object instanceof Double)
+ return Json.value((Double)object);
+ else if(object instanceof String)
+ return Json.value((String)object);
+ else if(object instanceof Collection)
+ return collectionAsJsonArray((Collection<?>)object);
+ else if(object instanceof Map)
+ return mapAsJsonObject((Map<?,?>)object);
+ else return null;
+ }
+ public static JsonArray collectionAsJsonArray(Collection<?> collection) {
+ JsonArray array = new JsonArray();
+ for(Object element:collection)
+ array.add(objectAsJsonValue(element));
+ return array;
+ }
+ public static JsonObject mapAsJsonObject(Map<?,?> map) {
+ JsonObject object = new JsonObject();
+ for(Entry<?,?> entry:map.entrySet())
+ object.add(String.valueOf(entry.getKey()),
+ objectAsJsonValue(entry.getValue()));
+ return object;
+ }
+}