How to use

RegexValidator

in

co.elastic.apm.agent.configuration.validation

/**
 * Constructs a {@link RegexValidator} which validates a string based on a {@link Pattern}
 *
 * @param regex the regular expression which should be used to validate an input string
 * @return a {@link RegexValidator} which validates a string based on a {@link Pattern}
 */
public static RegexValidator of(String regex) {
  return new RegexValidator(regex, "Value \"{0}\" does not match regex {1}");
}

  @Test
  void testRegexValidator() {
    SoftAssertions.assertSoftly(softly -> {
      softly.assertThatCode(() -> RegexValidator.of("foo").assertValid("foo")).doesNotThrowAnyException();
      // checking for nullness is not the responsibility of the validator, but it must be null safe
      softly.assertThatCode(() -> RegexValidator.of("foo").assertValid(null)).doesNotThrowAnyException();
      softly.assertThatCode(() -> RegexValidator.of("foo").assertValid("bar"))
        .isInstanceOf(IllegalArgumentException.class)
        .hasMessage("Value \"bar\" does not match regex foo");
      softly.assertThatCode(() -> RegexValidator.of("foo", "{0} is not {1}").assertValid("bar"))
        .isInstanceOf(IllegalArgumentException.class)
        .hasMessage("bar is not foo");
    });
  }
}

/**
 * Constructs a {@link RegexValidator} which validates a string based on a {@link Pattern}
 *
 * @param regex               the regular expression which should be used to validate an input string
 * @param errorMessagePattern a error message format pattern. The placeholder {@code {0}} contains the actual value,
 *                            while the placeholder {@code {1}} represents the regex.
 * @return a {@link RegexValidator} which validates a string based on a {@link Pattern}
 */
public static RegexValidator of(String regex, String errorMessagePattern) {
  return new RegexValidator(regex, errorMessagePattern);
}