/*
* Copyright 2014 Jeanfrancois Arcand
*
* 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.
*/
/*
* Copyright 2009 Richard Zschech.
*
* 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.atmosphere.gwt20.client;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.rpc.SerializationException;
import com.google.gwt.user.client.rpc.impl.ClientSerializationStreamReader;
import com.google.gwt.user.client.rpc.impl.ClientSerializationStreamWriter;
import com.google.gwt.user.client.rpc.impl.Serializer;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Logger;
/**
* The base class for serializers. To instantiate this class follow this example:
* <pre><code>
* <p/>
* {@literal @SerialTypes({ MyType1.class, MyType2.class })}
* public abstract class MyCometSerializer extends AtmosphereGWTSerializer {}
* <p/>
* AtmosphereGWTSerializer serializer = GWT.create(MyCometSerializer.class);
* AtmosphereClient client = new AtmosphereClient(url, serializer, listener);
* </code></pre>
* <p/>
* Where MyType1 and MyType2 are the types that your expecting to receive from the server.
* If you have a class hierarchy of messages that you want to send you only need to supply the base class here.
* <p/>
* For instance:
* <pre><code>
* public class Message {}
* <p/>
* public class MessageA extends Message {}
* <p/>
* public class MessageB extends Message {}
* <p/>
* {@literal @SerialTypes( Message.class )}
* public abstract class MyCometSerializer extends AtmosphereGWTSerializer {}
* <p/>
* </code></pre>
*/
public abstract class GwtRpcClientSerializer implements ClientSerializer {
private static final Logger logger = Logger.getLogger(GwtRpcClientSerializer.class.getName());
// buffer in order to capture split messages
private StringBuffer buffer = new StringBuffer(16100);
@Override
public Object deserialize(String raw) throws SerializationException {
List<String> messages = new ArrayList<String>();
messages.add(raw);
// create the objects
List<Object> objects = new ArrayList<Object>(messages.size());
for (String message : messages) {
try {
Serializer serializer = getRPCSerializer();
ClientSerializationStreamReader reader = new ClientSerializationStreamReader(serializer);
reader.prepareToRead(message);
objects.add(reader.readObject());
} catch (RuntimeException e) {
throw new SerializationException(e);
}
}
return objects;
}
@Override
public String serialize(Object message) throws SerializationException {
try {
Serializer serializer = getRPCSerializer();
ClientSerializationStreamWriter writer = new ClientSerializationStreamWriter(serializer, GWT.getModuleBaseURL(), GWT.getPermutationStrongName());
writer.prepareToWrite();
writer.writeObject(message);
return writer.toString();
} catch (RuntimeException e) {
throw new SerializationException(e);
}
}
protected abstract Serializer getRPCSerializer();
}