code: /* LanguageTool, a natural language style checker
   * Copyright (C) 2012 Daniel Naber (http://www.danielnaber.de)
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library 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.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
   * USA
   */
  package org.languagetool.rules.patterns;
  
  import org.junit.AfterClass;
  import org.junit.BeforeClass;
  import org.junit.Ignore;
  import org.junit.Test;
  
  import java.io.ByteArrayInputStream;
  import java.io.FilePermission;
  import java.security.CodeSource;
  import java.security.Permission;
  import java.security.PermissionCollection;
  import java.security.Policy;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.Enumeration;
  import java.util.List;
  
  public class PatternRuleLoaderPermissionTest {
  
    private static final SecurityManager secManager = System.getSecurityManager();
  
    @BeforeClass
    public static void startup() throws Exception {
      Policy.setPolicy(new MyPolicy());
      System.setSecurityManager(new SecurityManager());
    }
  
    @Ignore("doesn't work with Gradle, see http://stackoverflow.com/questions/32584997/;" +
      " also caused seemingly random exceptions after PR #1443 was merged")
    @Test
    public void testPermissionManager() throws Exception {
      try {
        PatternRuleLoader loader = new PatternRuleLoader();
        // do not crash if Authenticator.setDefault() is forbidden,
        // see https://github.com/languagetool-org/languagetool/issues/255
        loader.getRules(new ByteArrayInputStream("<rules lang='xx'></rules>".getBytes("utf-8")), "fakeName", null);
      } finally {
        System.setSecurityManager(null);
      }
    }
  
    @AfterClass
    public static void shutdown(){
      System.setSecurityManager(secManager);
    }
    
    static class MyPolicy extends Policy {
      @Override
      public PermissionCollection getPermissions(CodeSource codesource) {
        PermissionCollection perms = new MyPermissionCollection();
        perms.add(new RuntimePermission("setIO"));
        perms.add(new RuntimePermission("setSecurityManager"));
        perms.add(new FilePermission("<<ALL FILES>>", "read"));
        return perms;
      }
    }
  
    static class MyPermissionCollection extends PermissionCollection {
      private final List<Permission> perms = new ArrayList<>();
      @Override
      public void add(Permission p) {
        perms.add(p);
      }
      @Override
      public boolean implies(Permission p) {
        for (Permission perm : perms) {
          if (perm.implies(p)) {
            return true;
          }
        }
        return false;
      }
      @Override
      public Enumeration<Permission> elements() {
        return Collections.enumeration(perms);
      }
      @Override
      public boolean isReadOnly() {
        return false;
      }
    }
  
  }
  