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package org.junit.validator;
import java.util.concurrent.ConcurrentHashMap;
/**
* Creates instances of Annotation Validators.
*
* @since 4.12
*/
public class AnnotationValidatorFactory {
private static final ConcurrentHashMap VALIDATORS_FOR_ANNOTATION_TYPES =
new ConcurrentHashMap();
/**
* Creates the AnnotationValidator specified by the value in
* {@link org.junit.validator.ValidateWith}. Instances are
* cached.
*
* @return An instance of the AnnotationValidator.
*
* @since 4.12
*/
public AnnotationValidator createAnnotationValidator(ValidateWith validateWithAnnotation) {
AnnotationValidator validator = VALIDATORS_FOR_ANNOTATION_TYPES.get(validateWithAnnotation);
if (validator != null) {
return validator;
}
Class clazz = validateWithAnnotation.value();
if (clazz == null) {
throw new IllegalArgumentException("Can't create validator, value is null in annotation " + validateWithAnnotation.getClass().getName());
}
try {
AnnotationValidator annotationValidator = clazz.newInstance();
VALIDATORS_FOR_ANNOTATION_TYPES.putIfAbsent(validateWithAnnotation, annotationValidator);
return VALIDATORS_FOR_ANNOTATION_TYPES.get(validateWithAnnotation);
} catch (Exception e) {
throw new RuntimeException("Exception received when creating AnnotationValidator class " + clazz.getName(), e);
}
}
}