org.pentaho.proxy.creators.userdetailsservice.ProxyUserDetailsService.java Source code

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Here is the source code for org.pentaho.proxy.creators.userdetailsservice.ProxyUserDetailsService.java

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/*
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 * or from the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * Copyright 2016 Pentaho Corporation. All rights reserved.
 */

package org.pentaho.proxy.creators.userdetailsservice;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.dao.DataAccessException;
import org.springframework.security.userdetails.UserDetails;
import org.springframework.security.userdetails.UserDetailsService;
import org.springframework.security.userdetails.UsernameNotFoundException;
import org.springframework.util.ReflectionUtils;

import java.lang.reflect.Method;

/**
 * Created by tkafalas on 8/24/15.
 */
public class ProxyUserDetailsService implements UserDetailsService {
    private Logger logger = LoggerFactory.getLogger(getClass());

    private String FULL_NAME_SS4_USERNOTFOUNDEXCEPTION = "org.springframework.security.core.userdetails.UsernameNotFoundException";

    private Object sourceObject; // Hold the object so it is not garbage collected
    Method loadUserByNameMethod;
    Class<?> loadUserByNameReturnType;

    public ProxyUserDetailsService(Object sourceObject) {
        this.sourceObject = sourceObject;
        Class<? extends Object> clazz = sourceObject.getClass();
        loadUserByNameMethod = ReflectionUtils.findMethod(clazz, "loadUserByUsername",
                new Class[] { String.class });
        loadUserByNameReturnType = loadUserByNameMethod.getReturnType();
    }

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException, DataAccessException {
        try {
            Object result = ReflectionUtils.invokeMethod(loadUserByNameMethod, sourceObject,
                    new Object[] { username });
            if (result != null) {
                return new ProxyUserDetails(result);
            } else {
                logger.warn(
                        "Got a null from calling the method loadUserByUsername( String username ) of UserDetailsService: "
                                + sourceObject
                                + ". This is an interface violation beacuse it is specified that loadUserByUsername method should never return null. Throwing a UsernameNotFoundException.");
            }
        } catch (Exception e) {
            if (e.getClass().getName().equals(FULL_NAME_SS4_USERNOTFOUNDEXCEPTION)) {
                throw new UsernameNotFoundException(username + " not found", e);
            } else {
                logger.error(e.getMessage(), e);
            }
        }
        throw new UsernameNotFoundException(username);
    }
}