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Diffstat (limited to 'src/org/traccar/web/JsonConverter.java')
| -rw-r--r-- | src/org/traccar/web/JsonConverter.java | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/src/org/traccar/web/JsonConverter.java b/src/org/traccar/web/JsonConverter.java new file mode 100644 index 000000000..7962ac8ab --- /dev/null +++ b/src/org/traccar/web/JsonConverter.java @@ -0,0 +1,155 @@ +/* + * Copyright 2015 Anton Tananaev (anton.tananaev@gmail.com) + * + * 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 org.traccar.web; + +import java.beans.Introspector; +import java.io.Reader; +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; +import java.text.DateFormat; +import java.text.ParseException; +import java.text.SimpleDateFormat; +import java.util.Collection; +import java.util.Date; +import java.util.Map; +import javax.json.Json; +import javax.json.JsonArray; +import javax.json.JsonArrayBuilder; +import javax.json.JsonObject; +import javax.json.JsonObjectBuilder; +import javax.json.JsonValue; +import org.traccar.model.Factory; +import org.traccar.model.MiscFormatter; + +public class JsonConverter { + + private static final DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss"); + + public static Date parseDate(String value) throws ParseException { + return dateFormat.parse(value); + } + + public static <T extends Factory> T objectFromJson(Reader reader, T prototype) throws ParseException { + return objectFromJson(Json.createReader(reader).readObject(), prototype); + } + + public static <T> T enumObjectFromJson(Reader reader, EnumFactory<? extends Enum<?>> factory) throws ParseException { + JsonObject json = Json.createReader(reader).readObject(); + T object = factory.<T>create(json); + populateObject(json, object); + return object; + } + + public static <T extends Factory> T objectFromJson(JsonObject json, T prototype) throws ParseException { + T object = (T) prototype.create(); + populateObject(json, object); + return object; + } + + private static void populateObject(JsonObject json, Object object) throws ParseException { + Method[] methods = object.getClass().getMethods(); + + for (final Method method : methods) { + if (method.getName().startsWith("set") && method.getParameterTypes().length == 1) { + + final String name = Introspector.decapitalize(method.getName().substring(3)); + Class<?> parameterType = method.getParameterTypes()[0]; + + if (json.containsKey(name)) try { + if (parameterType.equals(boolean.class)) { + method.invoke(object, json.getBoolean(name)); + } else if (parameterType.equals(int.class)) { + method.invoke(object, json.getJsonNumber(name).intValue()); + } else if (parameterType.equals(long.class)) { + if (json.get(name).getValueType() == JsonValue.ValueType.NUMBER) { + method.invoke(object, json.getJsonNumber(name).longValue()); + } + } else if (parameterType.equals(double.class)) { + method.invoke(object, json.getJsonNumber(name).doubleValue()); + } else if (parameterType.equals(String.class)) { + method.invoke(object, json.getString(name)); + } else if (parameterType.equals(Date.class)) { + method.invoke(object, dateFormat.parse(json.getString(name))); + } else if (parameterType.isEnum()) { + method.invoke(object, Enum.valueOf((Class<? extends Enum>) parameterType, json.getString(name))); + } else if (parameterType.equals(Map.class)) { + //method.invoke(object, json.getString(name)); + } else { + Object nestedObject = parameterType.newInstance(); + populateObject(json.getJsonObject(name), nestedObject); + method.invoke(object, nestedObject); + } + } catch (IllegalAccessException | InvocationTargetException | InstantiationException error) { + } + } + } + + } + + public static <T> JsonObject objectToJson(T object) { + + JsonObjectBuilder json = Json.createObjectBuilder(); + + Method[] methods = object.getClass().getMethods(); + + for (Method method : methods) { + if(method.isAnnotationPresent(JsonIgnore.class)) { + continue; + } + if (method.getName().startsWith("get") && method.getParameterTypes().length == 0) { + String name = Introspector.decapitalize(method.getName().substring(3)); + try { + if (method.getReturnType().equals(boolean.class)) { + json.add(name, (Boolean) method.invoke(object)); + } else if (method.getReturnType().equals(int.class)) { + json.add(name, (Integer) method.invoke(object)); + } else if (method.getReturnType().equals(long.class)) { + json.add(name, (Long) method.invoke(object)); + } else if (method.getReturnType().equals(double.class)) { + json.add(name, (Double) method.invoke(object)); + } else if (method.getReturnType().equals(String.class)) { + String value = (String) method.invoke(object); + if (value != null) { + json.add(name, value); + } + } else if (method.getReturnType().equals(Date.class)) { + Date value = (Date) method.invoke(object); + if (value != null) { + json.add(name, dateFormat.format(value)); + } + } else if (method.getReturnType().equals(Map.class)) { + json.add(name, MiscFormatter.toJson((Map) method.invoke(object))); + } + } catch (IllegalAccessException | InvocationTargetException error) { + } + } + } + + return json.build(); + } + + public static JsonArray arrayToJson(Collection<?> array) { + + JsonArrayBuilder json = Json.createArrayBuilder(); + + for (Object object : array) { + json.add(objectToJson(object)); + } + + return json.build(); + } + +} |