ar.com.zauber.commons.social.facebook.security.FacebookAuthenticationProvider.java Source code

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Here is the source code for ar.com.zauber.commons.social.facebook.security.FacebookAuthenticationProvider.java

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/**
 * Copyright (c) 2005-2011 Zauber S.A. <http://www.zaubersoftware.com/>
 *
 * 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 ar.com.zauber.commons.social.facebook.security;

import org.apache.commons.lang.Validate;
import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.userdetails.UserDetails;

/**
 * {@link AuthenticationProvider} para Facebook
 * 
 * @author Francisco J. Gonzlez Costanz
 * @since Feb 4, 2010
 */
public class FacebookAuthenticationProvider implements AuthenticationProvider {

    private final FacebookUserDetailsService userDetailsService;

    /**
     * Creates the FacebookAuthenticationProvider.
     */
    public FacebookAuthenticationProvider(final FacebookUserDetailsService userDetailsService) {
        Validate.notNull(userDetailsService);
        this.userDetailsService = userDetailsService;
    }

    /** @see AuthenticationProvider#authenticate(Authentication) */
    public final Authentication authenticate(final Authentication authentication) throws AuthenticationException {
        Validate.notNull(authentication);

        Long fbUID = (Long) authentication.getCredentials();
        UserDetails userDetails = this.userDetailsService.loadUserByFacebookUID(fbUID);
        return new FacebookAuthenticationToken(fbUID, userDetails, userDetails.getAuthorities());
    }

    /** @see AuthenticationProvider#supports(java.lang.Class) */
    public final boolean supports(final Class<? extends Object> authentication) {
        return (FacebookAuthenticationToken.class.isAssignableFrom(authentication));
    }

}