/*

  * #%L

  * LambdaCallbackAdapter.java - mongodb-async-driver - Allanbank Consulting, Inc.

  * %%

  * Copyright (C) 2011 - 2014 Allanbank Consulting, 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.

  * #L%

  */

 package com.allanbank.mongodb.client;

 import com.allanbank.mongodb.Callback;

 import com.allanbank.mongodb.LambdaCallback;

 import com.allanbank.mongodb.StreamCallback;

 /**

  * LambdaCallbackAdapter provides an adapter for the {@link LambdaCallback} to a

  * {@link Callback} or {@link StreamCallback}.

  * 

  * @param <V>

  *            The type of the operation's result.

  * 

  * @api.no This class is <b>NOT</b> part of the drivers API. This class may be

  *         mutated in incompatible ways between any two releases of the driver.

  * @copyright 2013, Allanbank Consulting, Inc., All Rights Reserved

  */

 public final class LambdaCallbackAdapter<V> implements StreamCallback<V> {

     /** The {@link LambdaCallback} to trigger. */

     private final LambdaCallback<V> myLambda;

     /**

      * Creates a new LambdaCallbackAdapter.

      * 

      * @param lambda

      *            The {@link LambdaCallback} to trigger.

      */

     public LambdaCallbackAdapter(final LambdaCallback<V> lambda) {

         myLambda = lambda;

     }

     /**

      * {@inheritDoc}

      * <p>

      * Overridden to call {@link LambdaCallback#accept(Throwable, Object)

      * accept(null, result)} on the wrapped {@link LambdaCallback}.

      * </p>

      */

     @Override

     public void callback(final V result) {

         myLambda.accept(null, result);

     }

     /**

      * {@inheritDoc}

      * <p>

      * Overridden to call {@link LambdaCallback#accept(Throwable, Object)

      * accept(null, null)} on the wrapped {@link LambdaCallback}.

      * </p>

      */

     @Override

     public void done() {

         myLambda.accept(null, null);

     }

     /**

      * {@inheritDoc}

      * <p>

      * Overridden to call {@link LambdaCallback#accept(Throwable, Object)

      * accept(thrown, null)} on the wrapped {@link LambdaCallback}.

      * </p>

      */

     @Override

     public void exception(final Throwable thrown) {

         myLambda.accept(thrown, null);

     }

 }