Package org.springframework.social.facebook.config.support

Source Code of org.springframework.social.facebook.config.support.FacebookApiHelper

/*
* Copyright 2014 the original author or authors.
*
* 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.springframework.social.facebook.config.support;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.social.UserIdSource;
import org.springframework.social.config.xml.ApiHelper;
import org.springframework.social.connect.Connection;
import org.springframework.social.connect.UsersConnectionRepository;
import org.springframework.social.facebook.api.Facebook;
import org.springframework.social.facebook.api.impl.FacebookTemplate;

/**
* Support class for JavaConfig and XML configuration support.
* Creates an API binding instance for the current user's connection.
* @author Craig Walls
*/
public class FacebookApiHelper implements ApiHelper<Facebook> {

  private final UsersConnectionRepository usersConnectionRepository;

  private final UserIdSource userIdSource;

  private FacebookApiHelper(UsersConnectionRepository usersConnectionRepository, UserIdSource userIdSource) {
    this.usersConnectionRepository = usersConnectionRepository;
    this.userIdSource = userIdSource;   
  }

  public Facebook getApi() {
    if (logger.isDebugEnabled()) {
      logger.debug("Getting API binding instance for Facebook");
    }
   
    Connection<Facebook> connection = usersConnectionRepository.createConnectionRepository(userIdSource.getUserId()).findPrimaryConnection(Facebook.class);
    if (logger.isDebugEnabled() && connection == null) {
      logger.debug("No current connection; Returning default FacebookTemplate instance.");
    }
    return connection != null ? connection.getApi() : new FacebookTemplate();
  }

  private final static Log logger = LogFactory.getLog(FacebookApiHelper.class);

}
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