*             if the host cannot be resolved to find out.
     */
    boolean isActive(CIFSContext tc) throws UnknownHostException;

    /**
     * Determines if this address is set to be permanent.
     *
     * @param tc
     *            context to use
     * @return whether this address is permanent
     *
     * @throws UnknownHostException
     *             if the host cannot be resolved to find out.
     */

    public static String requireNonEmpty(String value, String fieldName) {
        if (value == null) {
            throw new IllegalArgumentException(fieldName + " cannot be null");
        }
        if (value.trim().isEmpty()) {
            throw new IllegalArgumentException(fieldName + " cannot be empty");
        }
        return value;
    }

    /**
     * Validates array is not null and has expected length
     *

        return builder()
                .session(requireNonNull(session, "session cannot be null"))
                .artifactCoordinates(requireNonNull(artifactCoordinates, "artifactCoordinates cannot be null"))
                .build();
    }

    @Nonnull
    static VersionResolverRequest build(
            @Nonnull Session session,

    static ArtifactInstallerRequest build(Session session, Collection<ProducedArtifact> artifacts) {
        return builder()
                .session(requireNonNull(session, "session cannot be null"))
                .artifacts(requireNonNull(artifacts, "artifacts cannot be null"))
                .build();
    }

    @NotThreadSafe
    class ArtifactInstallerRequestBuilder {
        Session session;
        RequestTrace trace;

  static final String REUSING_EDGE =
      "Edge %s already exists between the following nodes: %s, "
          + "so it cannot be reused to connect the following nodes: %s.";
  static final String MULTIPLE_EDGES_CONNECTING =
      "Cannot call edgeConnecting() when parallel edges exist between %s and %s. Consider calling "
          + "edgesConnecting() instead.";

     * host with the same IP address.
     *
     * @param addr
     *            the address to query
     * @return resolved addresses
     * @throws UnknownHostException
     *             if address cannot be resolved
     */
    NetbiosAddress[] getNbtAllByAddress(NetbiosAddress addr) throws UnknownHostException;

    /**
     * Retrieve all addresses of a host by it's address. NetBIOS hosts can

            } catch (final UnknownHostException uhe) {
                /* Java cannot determine the localhost. This is basically a config
                 * issue on the host. There's not much we can do about it. Just
                 * to suppress NPEs that would result we can create a possibly bogus
                 * address. Pretty sure the below cannot actually thrown a UHE tho.
                 */
                try {

    else
      JAVACMD="$JAVA_HOME/bin/java"
      JAVACCMD="$JAVA_HOME/bin/javac"

      if [ ! -x "$JAVACMD" ] || [ ! -x "$JAVACCMD" ]; then
        echo "The JAVA_HOME environment variable is not defined correctly, so mvnw cannot run." >&2
        echo "JAVA_HOME is set to \"$JAVA_HOME\", but \"\$JAVA_HOME/bin/java\" or \"\$JAVA_HOME/bin/javac\" does not exist." >&2
        return 1
      fi
    fi
  else
    JAVACMD="$(
      'set' +e

    }

    /**
     * Retrieve an <code>int</code>. If the key does not exist or
     * cannot be converted to an <code>int</code>, the provided default
     * argument will be returned.
     *
     * @param key the property key to look up
     * @param def the default value to return if the property is not found or cannot be parsed
     * @return the property value as an int, or the default value
     */

   * null will be returned.
   *
   * @throws ParameterNotInstantiableException if the static methods cannot be invoked because the
   *     default value of a parameter cannot be determined.
   * @throws IllegalAccessException if the class isn't public or is nested inside a non-public
   *     class, preventing its methods from being accessible.