jakarta.validation.MessageInterpolator Maven / Gradle / Ivy
/*
* Jakarta Validation API
*
* License: Apache License, Version 2.0
* See the license.txt file in the root directory or .
*/
package jakarta.validation;
import java.util.Locale;
import jakarta.validation.metadata.ConstraintDescriptor;
/**
* Interpolates a given constraint violation message.
*
* Implementations should be as tolerant as possible on syntax errors.
* Implementations must be thread-safe.
*
* @author Emmanuel Bernard
* @author Hardy Ferentschik
*/
public interface MessageInterpolator {
/**
* Interpolates the message template based on the constraint validation context.
*
* The locale is defaulted according to the {@code MessageInterpolator}
* implementation. See the implementation documentation for more detail.
*
* @param messageTemplate the message to interpolate
* @param context contextual information related to the interpolation
*
* @return interpolated error message
*/
String interpolate(String messageTemplate, Context context);
/**
* Interpolates the message template based on the constraint validation context.
* The {@code Locale} used is provided as a parameter.
*
* @param messageTemplate the message to interpolate
* @param context contextual information related to the interpolation
* @param locale the locale targeted for the message
*
* @return interpolated error message
*/
String interpolate(String messageTemplate, Context context, Locale locale);
/**
* Information related to the interpolation context.
*/
interface Context {
/**
* @return {@link ConstraintDescriptor} corresponding to the constraint being
* validated
*/
ConstraintDescriptor getConstraintDescriptor();
/**
* @return value being validated
*/
Object getValidatedValue();
/**
* Returns an instance of the specified type allowing access to
* provider-specific APIs. If the Jakarta Validation provider
* implementation does not support the specified class,
* {@link ValidationException} is thrown.
*
* @param type the class of the object to be returned
* @param the type of the object to be returned
* @return an instance of the specified class
* @throws ValidationException if the provider does not support the call
*
* @since 1.1
*/
T unwrap(Class type);
}
}