EaglerForge/sources/main/java/javax/annotation/MatchesPattern.java

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package javax.annotation;
import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.regex.Pattern;
import javax.annotation.meta.TypeQualifier;
import javax.annotation.meta.TypeQualifierValidator;
import javax.annotation.meta.When;
/**
* This annotation is used to denote String values that should always match
* given pattern.
* <p>
* When this annotation is applied to a method it applies to the method return
* value.
*/
@Documented
@TypeQualifier(applicableTo = String.class)
@Retention(RetentionPolicy.RUNTIME)
public @interface MatchesPattern {
@RegEx
String value();
int flags() default 0;
static class Checker implements TypeQualifierValidator<MatchesPattern> {
public When forConstantValue(MatchesPattern annotation, Object value) {
Pattern p = Pattern.compile(annotation.value(), annotation.flags());
if (p.matcher(((String) value)).matches())
return When.ALWAYS;
return When.NEVER;
}
}
}