org.hibernate.validator.internal.engine.constraintvalidation.AbstractConstraintValidatorManagerImpl Maven / Gradle / Ivy
/*
* Hibernate Validator, declare and validate application constraints
*
* License: Apache License, Version 2.0
* See the license.txt file in the root directory or .
*/
package org.hibernate.validator.internal.engine.constraintvalidation;
import static org.hibernate.validator.internal.util.CollectionHelper.newArrayList;
import java.lang.annotation.Annotation;
import java.lang.invoke.MethodHandles;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.validation.ConstraintDeclarationException;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorFactory;
import javax.validation.metadata.ConstraintDescriptor;
import org.hibernate.validator.constraintvalidation.HibernateConstraintValidator;
import org.hibernate.validator.constraintvalidation.HibernateConstraintValidatorInitializationContext;
import org.hibernate.validator.internal.metadata.descriptor.ConstraintDescriptorImpl;
import org.hibernate.validator.internal.util.TypeHelper;
import org.hibernate.validator.internal.util.logging.Log;
import org.hibernate.validator.internal.util.logging.LoggerFactory;
/**
* @author Guillaume Smet
*/
public abstract class AbstractConstraintValidatorManagerImpl implements ConstraintValidatorManager {
private static final Log LOG = LoggerFactory.make( MethodHandles.lookup() );
/**
* The explicit or implicit default constraint validator factory. We always cache {@code ConstraintValidator}
* instances if they are created via the default instance and with the default initialization context. Constraint
* validator instances created via other factory instances (specified eg via {@code ValidatorFactory#usingContext()}
* or initialization context are only cached for the most recently used factory and context.
*/
private final ConstraintValidatorFactory defaultConstraintValidatorFactory;
/**
* The explicit or implicit default constraint validator initialization context. We always cache
* {@code ConstraintValidator} instances if they are created via the default instance and with the default context.
* Constraint validator instances created via other factory instances (specified eg via
* {@code ValidatorFactory#usingContext()} or initialization context are only cached for the most recently used
* factory and context.
*/
private final HibernateConstraintValidatorInitializationContext defaultConstraintValidatorInitializationContext;
/**
* Creates a new {@code ConstraintValidatorManager}.
*
* @param defaultConstraintValidatorFactory the default validator factory
* @param defaultConstraintValidatorInitializationContext the default initialization context
*/
public AbstractConstraintValidatorManagerImpl(ConstraintValidatorFactory defaultConstraintValidatorFactory,
HibernateConstraintValidatorInitializationContext defaultConstraintValidatorInitializationContext) {
this.defaultConstraintValidatorFactory = defaultConstraintValidatorFactory;
this.defaultConstraintValidatorInitializationContext = defaultConstraintValidatorInitializationContext;
}
@Override
public ConstraintValidatorFactory getDefaultConstraintValidatorFactory() {
return defaultConstraintValidatorFactory;
}
@Override
public HibernateConstraintValidatorInitializationContext getDefaultConstraintValidatorInitializationContext() {
return defaultConstraintValidatorInitializationContext;
}
protected ConstraintValidator createAndInitializeValidator(
Type validatedValueType,
ConstraintDescriptorImpl descriptor,
ConstraintValidatorFactory constraintValidatorFactory,
HibernateConstraintValidatorInitializationContext initializationContext) {
ConstraintValidatorDescriptor validatorDescriptor = findMatchingValidatorDescriptor( descriptor, validatedValueType );
ConstraintValidator constraintValidator;
if ( validatorDescriptor == null ) {
return null;
}
constraintValidator = validatorDescriptor.newInstance( constraintValidatorFactory );
initializeValidator( descriptor, constraintValidator, initializationContext );
return constraintValidator;
}
/**
* Runs the validator resolution algorithm.
*
* @param validatedValueType The type of the value to be validated (the type of the member/class the constraint was placed on).
*
* @return The class of a matching validator.
*/
private ConstraintValidatorDescriptor findMatchingValidatorDescriptor(ConstraintDescriptorImpl descriptor, Type validatedValueType) {
Map> availableValidatorDescriptors = TypeHelper.getValidatorTypes(
descriptor.getAnnotationType(),
descriptor.getMatchingConstraintValidatorDescriptors()
);
List discoveredSuitableTypes = findSuitableValidatorTypes( validatedValueType, availableValidatorDescriptors.keySet() );
resolveAssignableTypes( discoveredSuitableTypes );
if ( discoveredSuitableTypes.size() == 0 ) {
return null;
}
if ( discoveredSuitableTypes.size() > 1 ) {
throw LOG.getMoreThanOneValidatorFoundForTypeException( validatedValueType, discoveredSuitableTypes );
}
Type suitableType = discoveredSuitableTypes.get( 0 );
return availableValidatorDescriptors.get( suitableType );
}
private List findSuitableValidatorTypes(Type type, Iterable availableValidatorTypes) {
List determinedSuitableTypes = newArrayList();
for ( Type validatorType : availableValidatorTypes ) {
if ( TypeHelper.isAssignable( validatorType, type )
&& !determinedSuitableTypes.contains( validatorType ) ) {
determinedSuitableTypes.add( validatorType );
}
}
return determinedSuitableTypes;
}
private void initializeValidator(
ConstraintDescriptor descriptor,
ConstraintValidator constraintValidator,
HibernateConstraintValidatorInitializationContext initializationContext) {
try {
if ( constraintValidator instanceof HibernateConstraintValidator ) {
( (HibernateConstraintValidator) constraintValidator ).initialize( descriptor, initializationContext );
}
constraintValidator.initialize( descriptor.getAnnotation() );
}
catch (RuntimeException e) {
if ( e instanceof ConstraintDeclarationException ) {
throw e;
}
throw LOG.getUnableToInitializeConstraintValidatorException( constraintValidator.getClass(), e );
}
}
/**
* Tries to reduce all assignable classes down to a single class.
*
* @param assignableTypes The set of all classes which are assignable to the class of the value to be validated and
* which are handled by at least one of the validators for the specified constraint.
*/
private void resolveAssignableTypes(List assignableTypes) {
if ( assignableTypes.size() == 0 || assignableTypes.size() == 1 ) {
return;
}
List typesToRemove = new ArrayList<>();
do {
typesToRemove.clear();
Type type = assignableTypes.get( 0 );
for ( int i = 1; i < assignableTypes.size(); i++ ) {
if ( TypeHelper.isAssignable( type, assignableTypes.get( i ) ) ) {
typesToRemove.add( type );
}
else if ( TypeHelper.isAssignable( assignableTypes.get( i ), type ) ) {
typesToRemove.add( assignableTypes.get( i ) );
}
}
assignableTypes.removeAll( typesToRemove );
} while ( typesToRemove.size() > 0 );
}
}