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 // Copyright 2009 The Apache Software Foundation
 //
 // 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.apache.tapestry5.services;
A service used when a component or service needs to encode some amount of data on the client as a string. The string may be a query parameter, hidden form field, or a portion of a URL. The default implementation converts the object output stream into a Base64 string.

Since:
5.1.0.1
public interface ClientDataEncoder
{
    
Creates a sink for client data. The sink provides an output stream and ultimately, a string representation of the data sent to the stream.

Returns:
a new sink
    ClientDataSink createSink();

    
Decodes data previously obtained from ClientDataSink.getClientData().

Parameters:
clientData encoded client data
Returns:
stream of decoded data
    ObjectInputStream decodeClientData(String clientDatathrows IOException;

    
Decoes client data obtained via ClientDataSink.getEncodedClientData().

Parameters:
clientData URLEncoded client data
Returns:
stream of objects
Throws:
java.io.IOException
Since:
5.1.0.4
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