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/*
* 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.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.lang.reflect.Array;
import java.lang.reflect.Field;
import java.util.EnumMap;
/**
* The super source version is used in web mode. This is only called in hosted mode.
* Custom field serializer for {@link java.util.EnumMap}.
*/
@SuppressWarnings({"unchecked", "rawtypes"})
public final class EnumMap_CustomFieldSerializer extends CustomFieldSerializer {
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);
}
/**
* Since this code is only run in hosted mode, reflection can be used.
*/
public static void serialize(SerializationStreamWriter streamWriter, EnumMap instance)
throws SerializationException {
Class c = instance.getClass();
Field keyUniverseField;
Object keyUniverse = null;
try {
keyUniverseField = c.getDeclaredField("keyUniverse");
keyUniverseField.setAccessible(true);
keyUniverse = keyUniverseField.get(instance);
} catch (IllegalArgumentException e) {
throw new SerializationException(e);
} catch (IllegalAccessException e) {
throw new SerializationException(e);
} catch (SecurityException e) {
throw new SerializationException(e);
} catch (NoSuchFieldException e) {
throw new SerializationException(e);
}
Object exemplar = Array.get(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);
}
}