| /* |
| * Copyright 2012 Google Inc. |
| * |
| * 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.google.gwt.user.client.rpc.core.java.util; |
| |
| import com.google.gwt.core.client.GwtScriptOnly; |
| import com.google.gwt.user.client.rpc.CustomFieldSerializer; |
| import com.google.gwt.user.client.rpc.SerializationException; |
| import com.google.gwt.user.client.rpc.SerializationStreamReader; |
| import com.google.gwt.user.client.rpc.SerializationStreamWriter; |
| |
| import java.util.EnumMap; |
| |
| /** |
| * Custom field serializer for {@link java.util.EnumMap}. |
| */ |
| @GwtScriptOnly |
| @SuppressWarnings({"unchecked", "rawtypes"}) |
| public final class EnumMap_CustomFieldSerializer extends CustomFieldSerializer<EnumMap> { |
| |
| public static void deserialize(SerializationStreamReader streamReader, EnumMap instance) |
| throws SerializationException { |
| Map_CustomFieldSerializerBase.deserialize(streamReader, instance); |
| } |
| |
| /** |
| * EnumMap has no empty constructor; you must provide the class literal to the constructor. |
| * However GWT doesn't emulate java.lang.Class.forName() nor is java.util.Class GWT-RPC |
| * serializable. In order to get the type across the wire, one enum of the appropriate class is |
| * serialized at the beginning of the stream. Upon deserialization this enum's type is |
| * introspected and used in the constructor for the new EnumMap. |
| */ |
| public static EnumMap instantiate(SerializationStreamReader streamReader) |
| throws SerializationException { |
| Object exemplar = streamReader.readObject(); |
| Class clazz = exemplar.getClass(); |
| return new EnumMap(clazz); |
| } |
| |
| public static native <E> E[] getKeyUniverse(EnumMap<?, ?> map) /*-{ |
| return map.@java.util.EnumMap::keySet.@java.util.EnumSet$EnumSetImpl::all; |
| }-*/; |
| |
| /** |
| * A jsni method is used to access the private keySet field of the EnumMap instance. |
| * This EnumSet field is filled with the universe of allowed enums even if the instance is empty. |
| * The first enum is pulled from the set and serialized to the stream in order to allow the other |
| * side to instantiate the correct type of EnumMap. |
| */ |
| public static void serialize(SerializationStreamWriter streamWriter, EnumMap instance) |
| throws SerializationException { |
| Object exemplar; |
| Object [] keyUniverse = getKeyUniverse(instance); |
| exemplar = keyUniverse[0]; |
| streamWriter.writeObject(exemplar); |
| Map_CustomFieldSerializerBase.serialize(streamWriter, instance); |
| } |
| |
| @Override |
| public void deserializeInstance(SerializationStreamReader streamReader, EnumMap instance) |
| throws SerializationException { |
| deserialize(streamReader, instance); |
| } |
| |
| @Override |
| public boolean hasCustomInstantiateInstance() { |
| return true; |
| } |
| |
| @Override |
| public EnumMap instantiateInstance(SerializationStreamReader streamReader) |
| throws SerializationException { |
| return instantiate(streamReader); |
| } |
| |
| @Override |
| public void serializeInstance(SerializationStreamWriter streamWriter, EnumMap instance) |
| throws SerializationException { |
| serialize(streamWriter, instance); |
| } |
| } |