com.springsource.greenhouse.account.AccountUtils.java Source code

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Here is the source code for com.springsource.greenhouse.account.AccountUtils.java

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/*
 * Copyright 2010 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 com.springsource.greenhouse.account;

import java.util.Collection;

import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.context.SecurityContextHolder;

/**
 * Some static helper methods related to Accounts.
 * @author Keith Donald
 */
public final class AccountUtils {

    /**
     * Programmatically sign-in the member holding the provided Account.
     * Sets the Account in the SecurityContext, which will associate this Account with the user Session.
     */
    public static void signin(Account account) {
        SecurityContextHolder.getContext().setAuthentication(authenticationTokenFor(account));
    }

    /**
     * Construct a Spring Security Authentication token from an Account object.
     * Useful for treating the Account as a Principal in Spring Security.
     */
    public static Authentication authenticationTokenFor(Account account) {
        return new UsernamePasswordAuthenticationToken(account, null, (Collection<GrantedAuthority>) null);
    }

    /**
     * Get the currently authenticated Account principal.
     */
    public static Account getCurrentAccount() {
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        if (authentication == null) {
            return null;
        }
        Object principal = authentication.getPrincipal();
        return principal instanceof Account ? (Account) principal : null;
    }

    private AccountUtils() {
    }
}