new SecurityManager() {
          @Override
          public void checkPermission(Permission p) {
            if (readClassPathFiles.implies(p)) {
              throw new SecurityException("Disallowed: " + p);
            }
          }
        };
    System.setSecurityManager(disallowFilesSecurityManager);
    try {
      file.exists();
      fail("Did not get expected SecurityException");

        new SecurityManager() {
          @Override
          public void checkPermission(Permission p) {
            if (readSystemProperty.equals(p)) {
              throw new SecurityException("Disallowed: " + p);
            }
          }
        };
    System.setSecurityManager(disallowPropertySecurityManager);

    settableFutureClass = classReloader.loadClass(SettableFuture.class.getName());

    /*

        new SecurityManager() {
          @Override
          public void checkPermission(Permission p) {
            if (readClassPathFiles.implies(p)) {
              throw new SecurityException("Disallowed: " + p);
            }
          }
        };
    System.setSecurityManager(disallowFilesSecurityManager);
    try {
      file.exists();
      fail("Did not get expected SecurityException");

 * test methods in these degenerate classloaders.
 */

public class AggregateFutureStateFallbackAtomicHelperTest extends TestCase {

  /**
   * This classloader disallows AtomicReferenceFieldUpdater and AtomicIntegerFieldUpdate which will
   * prevent us from selecting our {@code SafeAtomicHelper} strategy.
   *

   * contains(null)} or {@code remove(null)}, but instead must return a simple {@code false}.
   */
  ALLOWS_NULL_QUERIES,
  ALLOWS_NULL_VALUES(ALLOWS_NULL_QUERIES),

  /**
   * Indicates that a collection disallows certain elements (other than {@code null}, whose validity
   * as an element is indicated by the presence or absence of {@link #ALLOWS_NULL_VALUES}). From the
   * documentation for {@link Collection}:
   *
   * <blockquote>

   * contains(null)} or {@code remove(null)}, but instead must return a simple {@code false}.
   */
  ALLOWS_NULL_QUERIES,
  ALLOWS_NULL_VALUES(ALLOWS_NULL_QUERIES),

  /**
   * Indicates that a collection disallows certain elements (other than {@code null}, whose validity
   * as an element is indicated by the presence or absence of {@link #ALLOWS_NULL_VALUES}). From the
   * documentation for {@link Collection}:
   *
   * <blockquote>

  // execution significantly)

  /**
   * This classloader disallows {@link sun.misc.Unsafe}, which will prevent us from selecting our
   * preferred strategy {@code UnsafeAtomicHelper}.
   */
  private static final ClassLoader NO_UNSAFE =
      getClassLoader(ImmutableSet.of(sun.misc.Unsafe.class.getName()));

  /**
   * This classloader disallows {@link sun.misc.Unsafe} and {@link AtomicReferenceFieldUpdater},

    // contain non-decimal characters.
    int length = end - start;
    if (length <= 0 || length > 3) {
      throw new NumberFormatException();
    }
    // Disallow leading zeroes, because no clear standard exists on
    // whether these should be interpreted as decimal or octal.
    if (length > 1 && ipString.charAt(start) == '0') {
      throw new NumberFormatException();
    }

   *
   * <p>URI formatting requires that IPv6 literals be surrounded by brackets, like "[2001:db8::1]".
   * Chain this call after {@link #fromString(String)} to increase the strictness of the parser, and
   * disallow IPv6 literals that don't contain these brackets.
   *
   * <p>Note that this parser identifies IPv6 literals solely based on the presence of a colon. To

    /*
     * Note that we allow (in contravention of a strict interpretation of the relevant RFCs) domain
     * parts other than the last may begin with a digit (for example, "3com.com"). It's important to
     * disallow an initial digit in the last part; it's the only thing that stops an IPv4 numeric
     * address like 127.0.0.1 from looking like a valid domain name.
     */

    if (isFinalPart && DIGIT_MATCHER.matches(part.charAt(0))) {