/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements. See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership. The ASF licenses this file

  * to you 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.johnzon.websocket.internal.jsr;

 import java.io.IOException;

 import java.io.Reader;

 import javax.json.JsonReader;

 import javax.json.JsonReaderFactory;

 import javax.websocket.DecodeException;

 import javax.websocket.Decoder;

 import javax.websocket.EndpointConfig;

 public abstract class JsrDecoder<T> implements Decoder.TextStream<T> {

     private JsonReaderFactory factory;

     protected abstract T doRead(JsonReader jsonReader);

     @Override

     public void init(final EndpointConfig endpointConfig) {

         factory = FactoryLocator.readerLocate();

     }

     @Override

     public T decode(final Reader reader) throws DecodeException, IOException {

         final JsonReader jsonReader = factory.createReader(reader);

         try {

             return doRead(jsonReader);

         } finally {

             jsonReader.close();

         }

     }

     @Override

     public void destroy() {

         // no-op

     }

 }