com.rosy.bill.security.SpringSecurityUtils.java Source code

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Here is the source code for com.rosy.bill.security.SpringSecurityUtils.java

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/**
 * Copyright (c) 2005-2009 springside.org.cn
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * 
 * $Id: SpringSecurityUtils.java,v 1.1 2011/03/28 08:01:24 zwm Exp $
 */
package com.rosy.bill.security;

import java.util.Collection;

import javax.servlet.http.HttpServletRequest;

import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.context.SecurityContext;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.web.authentication.WebAuthenticationDetails;
import org.springframework.security.web.authentication.preauth.PreAuthenticatedAuthenticationToken;

/**
 * SpringSecurity.
 * 
 * ?. ??SpringSecurity 3.0.x.
 * 
 * @author calvin 
 */
public class SpringSecurityUtils {
    /**
     * ??, SpringSecurityUser?, ?null.
     */
    @SuppressWarnings("unchecked")
    public static <T extends User> T getCurrentUser() {
        Authentication authentication = getAuthentication();

        if (authentication == null) {
            return null;
        }

        Object principal = authentication.getPrincipal();
        if (!(principal instanceof User)) {
            return null;
        }

        return (T) principal;
    }

    /**
     * ????, ?.
     */
    public static String getCurrentUserName() {
        Authentication authentication = getAuthentication();

        if (authentication == null || authentication.getPrincipal() == null) {
            return "";
        }

        return authentication.getName();
    }

    /**
     * ????, ?.
     */
    public static String getCurrentAccountName() {
        Authentication authentication = getAuthentication();

        if (authentication == null || authentication.getPrincipal() == null) {
            return "";
        }

        return authentication.getName();
    }

    /**
     * ??IP, ?.
     */
    public static String getCurrentUserIp() {
        Authentication authentication = getAuthentication();

        if (authentication == null) {
            return "";
        }

        Object details = authentication.getDetails();
        if (!(details instanceof WebAuthenticationDetails)) {
            return "";
        }

        WebAuthenticationDetails webDetails = (WebAuthenticationDetails) details;
        return webDetails.getRemoteAddress();
    }

    /**
     * ?, ??true.
     */
    public static boolean hasAnyRole(String... roles) {
        Authentication authentication = getAuthentication();

        if (authentication == null) {
            return false;
        }

        Collection<GrantedAuthority> grantedAuthorityList = authentication.getAuthorities();
        for (String role : roles) {
            for (GrantedAuthority authority : grantedAuthorityList) {
                if (role.equals(authority.getAuthority())) {
                    return true;
                }
            }
        }

        return false;
    }

    /**
     * UserDetails?Security Context.
     * 
     * @param userDetails ??.
     * @param request ?IP??,?Null.
     */
    public static void saveUserDetailsToContext(UserDetails userDetails, HttpServletRequest request) {
        PreAuthenticatedAuthenticationToken authentication = new PreAuthenticatedAuthenticationToken(userDetails,
                userDetails.getPassword(), userDetails.getAuthorities());

        if (request != null) {
            authentication.setDetails(new WebAuthenticationDetails(request));
        }

        SecurityContextHolder.getContext().setAuthentication(authentication);
    }

    /**
     * ?Authentication, ?SecurityContextnull.
     */
    private static Authentication getAuthentication() {
        SecurityContext context = SecurityContextHolder.getContext();

        if (context == null) {
            return null;
        }

        return context.getAuthentication();
    }
}