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jclouds components to access OAuth

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/**
 * Licensed to jclouds, Inc. (jclouds) under one or more
 * contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  jclouds 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.jclouds.oauth.v2.config;

import static org.jclouds.rest.config.BinderUtils.bindHttpApi;

import java.net.URI;

import javax.inject.Named;
import javax.inject.Singleton;

import org.jclouds.oauth.v2.OAuthApi;

import com.google.common.base.Supplier;
import com.google.common.base.Suppliers;
import com.google.inject.AbstractModule;
import com.google.inject.Provides;

/**
 * An OAuth module to be used form other providers.
 * 
 * @author David Alves
 */
public class OAuthAuthenticationModule extends AbstractModule {

   @Override
   protected void configure() {
      bindHttpApi(binder(), OAuthApi.class);
   }

   /**
    * When oauth is used as a module the oauth endpoint is a normal property
    */
   @Provides
   @Singleton
   @Authentication
   protected Supplier provideAuthenticationEndpoint(@Named("oauth.endpoint") String endpoint) {
      return Suppliers.ofInstance(URI.create(endpoint));
   }
}