UserContext.java

/*
 * (c) Copyright 2005-2012 JAXIO, www.jaxio.com
 * Source code generated by Celerio, a Jaxio product
 * Want to use Celerio within your company? email us at info@jaxio.com
 * Follow us on twitter: @springfuse
 * Template pack-backend-sd:src/main/java/project/security/UserContext.p.vm.java
 */
package com.company.demo.security;

import static com.google.common.collect.Lists.newArrayList;

import java.util.Collections;
import java.util.List;
import java.util.Locale;

import org.springframework.context.i18n.LocaleContextHolder;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;

/**
 * Get Spring security context to access user data security infos
 */
public class UserContext {
    /**
     * Get the current username. Note that it may not correspond to a username that
     * currently exists in your accounts' repository; it could be a spring security
     * 'anonymous user'.
     *
     * @return the current user's username, or null if none.
     */
    public static String getUsername() {
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();

        if (auth != null) {
            Object principal = auth.getPrincipal();

            if (principal instanceof UserDetails) {
                return ((UserDetails) principal).getUsername();
            }

            return (String) principal.toString();
        }

        return null;
    }

    /**
     * return the current locale
     */
    public static Locale getLocale() {
        return LocaleContextHolder.getLocale();
    }

    /**
     * Retrieve the current UserDetails bound to the current thread by Spring Security, if any.
     */
    public static UserDetails getUserDetails() {
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();

        if (auth != null && auth.getPrincipal() instanceof UserDetails) {
            return ((UserDetails) auth.getPrincipal());
        }

        return null;
    }

    /**
     * Return the current roles bound to the current thread by Spring Security.
     */
    public static List<String> getRoles() {
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();

        if (auth != null) {
            return toStringList(auth.getAuthorities());
        }

        return Collections.emptyList();
    }

    // ---------------------------------------
    // Conversion utils
    // ---------------------------------------

    public static List<String> toStringList(Iterable<GrantedAuthority> grantedAuthorities) {
        List<String> result = newArrayList();

        for (GrantedAuthority grantedAuthority : grantedAuthorities) {
            result.add(grantedAuthority.getAuthority());
        }

        return result;
    }
}