content: /*
   * Copyright 2010-2025 Hyland Software, Inc. and its affiliates.
   *
   * 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.activiti.examples;
  
  import java.util.Collection;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.security.core.Authentication;
  import org.springframework.security.core.GrantedAuthority;
  import org.springframework.security.core.context.SecurityContextHolder;
  import org.springframework.security.core.context.SecurityContextImpl;
  import org.springframework.security.core.userdetails.UserDetails;
  import org.springframework.security.core.userdetails.UserDetailsService;
  import org.springframework.stereotype.Component;
  
  @Component
  public class SecurityUtil {
  
      @Autowired
      private UserDetailsService userDetailsService;
  
      public void logInAs(String username) {
          UserDetails user = userDetailsService.loadUserByUsername(username);
          if (user == null) {
              throw new IllegalStateException("User " + username + " doesn't exist, please provide a valid user");
          }
  
          SecurityContextHolder.setContext(
              new SecurityContextImpl(
                  new Authentication() {
                      @Override
                      public Collection<? extends GrantedAuthority> getAuthorities() {
                          return user.getAuthorities();
                      }
  
                      @Override
                      public Object getCredentials() {
                          return user.getPassword();
                      }
  
                      @Override
                      public Object getDetails() {
                          return user;
                      }
  
                      @Override
                      public Object getPrincipal() {
                          return user;
                      }
  
                      @Override
                      public boolean isAuthenticated() {
                          return true;
                      }
  
                      @Override
                      public void setAuthenticated(boolean isAuthenticated) throws IllegalArgumentException {}
  
                      @Override
                      public String getName() {
                          return user.getUsername();
                      }
                  }
              )
          );
          org.activiti.engine.impl.identity.Authentication.setAuthenticatedUserId(username);
      }
  }
  