166e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilsonimport java.lang.annotation.Documented; 266e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilsonimport java.lang.annotation.Retention; 366e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilsonimport java.lang.annotation.RetentionPolicy; 466e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson 566e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilsonimport javax.annotation.meta.TypeQualifier; 666e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilsonimport javax.annotation.meta.TypeQualifierValidator; 766e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilsonimport javax.annotation.meta.When; 866e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson 966e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson@Documented 1066e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson@TypeQualifier(applicableTo=String.class) 1166e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson@Retention(RetentionPolicy.RUNTIME) 1266e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilsonpublic @interface FixedLengthString { 1366e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson int value(); 1466e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson 1566e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson class Checker implements TypeQualifierValidator<FixedLengthString> { 1666e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson 1766e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson public When forConstantValue(FixedLengthString annotation, Object v) { 1866e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson if (!(v instanceof String)) 1966e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson return When.NEVER; 2066e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson String s = (String) v; 2166e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson if (s.length() == annotation.value()) 2266e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson return When.ALWAYS; 2366e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson return When.NEVER; 2466e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson } 2566e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson } 2666e84b9ff30de7c75b510cb9117205368cf5bd25Jesse Wilson}