org.meruvian.yama.webapi.config.oauth.UserTokenConverter.java Source code

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Here is the source code for org.meruvian.yama.webapi.config.oauth.UserTokenConverter.java

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/**
 * Copyright 2014 Meruvian
 *
 * 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.meruvian.yama.webapi.config.oauth;

import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.Map;

import org.meruvian.yama.core.user.User;
import org.meruvian.yama.web.security.DefaultUserDetails;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.AuthorityUtils;
import org.springframework.security.oauth2.provider.token.DefaultUserAuthenticationConverter;
import org.springframework.util.StringUtils;

/**
 * @author Dian Aditya
 *
 */
public class UserTokenConverter extends DefaultUserAuthenticationConverter {
    protected static final String USER_ID = "user_id";

    public Map<String, ?> convertUserAuthentication(Authentication authentication) {
        Map<String, Object> response = new LinkedHashMap<String, Object>();
        response.put(USERNAME, authentication.getName());

        if (authentication.getPrincipal() instanceof DefaultUserDetails) {
            DefaultUserDetails details = (DefaultUserDetails) authentication.getPrincipal();
            response.put(USER_ID, details.getId());
        }

        if (authentication.getAuthorities() != null && !authentication.getAuthorities().isEmpty()) {
            response.put(AUTHORITIES, AuthorityUtils.authorityListToSet(authentication.getAuthorities()));
        }

        return response;
    }

    public Authentication extractAuthentication(Map<String, ?> map) {
        if (map.containsKey(USERNAME) && map.containsKey(USER_ID)) {
            DefaultUserDetails details = new DefaultUserDetails((String) map.get(USERNAME), "N/A",
                    getAuthorities(map));
            details.setId((String) map.get(USER_ID));

            User user = new User();
            user.setId(details.getId());
            user.setUsername(details.getUsername());
            details.setUser(user);

            return new UsernamePasswordAuthenticationToken(details, details.getPassword(),
                    details.getAuthorities());
        }

        return null;
    }

    private Collection<? extends GrantedAuthority> getAuthorities(Map<String, ?> map) {
        Object authorities = map.get(AUTHORITIES);

        if (authorities instanceof String) {
            AuthorityUtils.commaSeparatedStringToAuthorityList((String) authorities);
        }

        if (authorities instanceof Collection) {
            return AuthorityUtils.commaSeparatedStringToAuthorityList(
                    StringUtils.collectionToCommaDelimitedString((Collection<?>) authorities));
        }

        return AuthorityUtils.commaSeparatedStringToAuthorityList("");
    }
}