http://findbugs.sourceforge.net/: JSR305 Annotations for Findbugs 
package javax.annotation;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

import javax.annotation.meta.TypeQualifier;
import javax.annotation.meta.When;


This annotation is used to denote String values that are untainted,
i.e. properly validated.


For example, this annotation should be used on the String value which
represents SQL query to be passed to database engine.


When this annotation is applied to a method it applies to the method return value.

See Also:
  • Tainted
/**
 * This annotation is used to denote String values that are untainted,
 * i.e. properly validated.
 * <p>
 * For example, this annotation should be used on the String value which
 * represents SQL query to be passed to database engine.
 * <p>
 * When this annotation is applied to a method it applies to the method return value.
 *
 * @see Tainted
 */
@Documented
@TypeQualifier
@Retention(RetentionPolicy.RUNTIME)
public @interface Untainted {
    When when() default When.ALWAYS;
}