org.hibernate.validator.internal.metadata.BeanMetaDataManager 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.metadata;
import static org.hibernate.validator.internal.util.CollectionHelper.newArrayList;
import static org.hibernate.validator.internal.util.ConcurrentReferenceHashMap.Option.IDENTITY_COMPARISONS;
import static org.hibernate.validator.internal.util.ConcurrentReferenceHashMap.ReferenceType.SOFT;
import static org.hibernate.validator.internal.util.logging.Messages.MESSAGES;
import java.util.EnumSet;
import java.util.List;
import javax.validation.valueextraction.ValueExtractor;
import org.hibernate.validator.internal.engine.MethodValidationConfiguration;
import org.hibernate.validator.internal.engine.groups.ValidationOrderGenerator;
import org.hibernate.validator.internal.engine.valueextraction.ValueExtractorManager;
import org.hibernate.validator.internal.metadata.aggregated.BeanMetaData;
import org.hibernate.validator.internal.metadata.aggregated.BeanMetaDataImpl;
import org.hibernate.validator.internal.metadata.aggregated.BeanMetaDataImpl.BeanMetaDataBuilder;
import org.hibernate.validator.internal.metadata.core.AnnotationProcessingOptions;
import org.hibernate.validator.internal.metadata.core.AnnotationProcessingOptionsImpl;
import org.hibernate.validator.internal.metadata.core.ConstraintHelper;
import org.hibernate.validator.internal.metadata.provider.AnnotationMetaDataProvider;
import org.hibernate.validator.internal.metadata.provider.MetaDataProvider;
import org.hibernate.validator.internal.metadata.raw.BeanConfiguration;
import org.hibernate.validator.internal.util.ConcurrentReferenceHashMap;
import org.hibernate.validator.internal.util.Contracts;
import org.hibernate.validator.internal.util.ExecutableHelper;
import org.hibernate.validator.internal.util.ExecutableParameterNameProvider;
import org.hibernate.validator.internal.util.TypeResolutionHelper;
import org.hibernate.validator.internal.util.classhierarchy.ClassHierarchyHelper;
import org.hibernate.validator.metadata.BeanMetaDataClassNormalizer;
/**
* This manager is in charge of providing all constraint related meta data
* required by the validation engine.
*
* Actual retrieval of meta data is delegated to {@link MetaDataProvider}
* implementations which load meta-data based e.g. based on annotations or XML.
*
*
* For performance reasons a cache is used which stores all meta data once
* loaded for repeated retrieval. Upon initialization this cache is populated
* with meta data provided by the given eager providers. If the cache
* doesn't contain the meta data for a requested type it will be retrieved on
* demand using the annotation based provider.
*
*
* @author Gunnar Morling
* @author Chris Beckey <[email protected]>
* @author Guillaume Smet
*/
public class BeanMetaDataManager {
/**
* The default initial capacity for this cache.
*/
private static final int DEFAULT_INITIAL_CAPACITY = 16;
/**
* The default load factor for this cache.
*/
private static final float DEFAULT_LOAD_FACTOR = 0.75f;
/**
* The default concurrency level for this cache.
*/
private static final int DEFAULT_CONCURRENCY_LEVEL = 16;
/**
* Additional metadata providers used for meta data retrieval if
* the XML and/or programmatic configuration is used.
*/
private final List metaDataProviders;
/**
* Helper for builtin constraints and their validator implementations
*/
private final ConstraintHelper constraintHelper;
/**
* Used for resolving generic type information.
*/
private final TypeResolutionHelper typeResolutionHelper;
/**
* The {@link ValueExtractor} manager.
*/
private final ValueExtractorManager valueExtractorManager;
private final ExecutableParameterNameProvider parameterNameProvider;
/**
* Used to cache the constraint meta data for validated entities
*/
private final ConcurrentReferenceHashMap, BeanMetaData> beanMetaDataCache;
/**
* Used for resolving type parameters. Thread-safe.
*/
private final ExecutableHelper executableHelper;
private final BeanMetaDataClassNormalizer beanMetaDataClassNormalizer;
private final ValidationOrderGenerator validationOrderGenerator;
/**
* the three properties in this field affect the invocation of rules associated to section 4.5.5
* of the specification. By default they are all false, if true they allow
* for relaxation of the Liskov Substitution Principal.
*/
private final MethodValidationConfiguration methodValidationConfiguration;
public BeanMetaDataManager(ConstraintHelper constraintHelper,
ExecutableHelper executableHelper,
TypeResolutionHelper typeResolutionHelper,
ExecutableParameterNameProvider parameterNameProvider,
ValueExtractorManager valueExtractorManager,
BeanMetaDataClassNormalizer beanMetaDataClassNormalizer,
ValidationOrderGenerator validationOrderGenerator,
List optionalMetaDataProviders,
MethodValidationConfiguration methodValidationConfiguration) {
this.constraintHelper = constraintHelper;
this.executableHelper = executableHelper;
this.typeResolutionHelper = typeResolutionHelper;
this.valueExtractorManager = valueExtractorManager;
this.parameterNameProvider = parameterNameProvider;
this.beanMetaDataClassNormalizer = beanMetaDataClassNormalizer;
this.validationOrderGenerator = validationOrderGenerator;
this.metaDataProviders = newArrayList();
this.metaDataProviders.addAll( optionalMetaDataProviders );
this.methodValidationConfiguration = methodValidationConfiguration;
this.beanMetaDataCache = new ConcurrentReferenceHashMap<>(
DEFAULT_INITIAL_CAPACITY,
DEFAULT_LOAD_FACTOR,
DEFAULT_CONCURRENCY_LEVEL,
SOFT,
SOFT,
EnumSet.of( IDENTITY_COMPARISONS )
);
AnnotationProcessingOptions annotationProcessingOptions = getAnnotationProcessingOptionsFromNonDefaultProviders();
AnnotationMetaDataProvider defaultProvider = new AnnotationMetaDataProvider(
constraintHelper,
typeResolutionHelper,
valueExtractorManager,
annotationProcessingOptions
);
this.metaDataProviders.add( defaultProvider );
}
// TODO Some of these casts from BeanMetadata to BeanMetadata may not be safe.
// Maybe we should return a wrapper around the BeanMetadata if the normalized class is different from beanClass?
@SuppressWarnings("unchecked")
public BeanMetaData getBeanMetaData(Class beanClass) {
Contracts.assertNotNull( beanClass, MESSAGES.beanTypeCannotBeNull() );
Class normalizedBeanClass = beanMetaDataClassNormalizer.normalize( beanClass );
// First, let's do a simple lookup as it's the default case
BeanMetaData beanMetaData = (BeanMetaData) beanMetaDataCache.get( normalizedBeanClass );
if ( beanMetaData != null ) {
return (BeanMetaData) beanMetaData;
}
beanMetaData = createBeanMetaData( normalizedBeanClass );
BeanMetaData previousBeanMetaData = (BeanMetaData) beanMetaDataCache.putIfAbsent( normalizedBeanClass, beanMetaData );
// we return the previous value if not null
if ( previousBeanMetaData != null ) {
return (BeanMetaData) previousBeanMetaData;
}
return (BeanMetaData) beanMetaData;
}
public void clear() {
beanMetaDataCache.clear();
}
public int numberOfCachedBeanMetaDataInstances() {
return beanMetaDataCache.size();
}
/**
* Creates a {@link org.hibernate.validator.internal.metadata.aggregated.BeanMetaData} containing the meta data from all meta
* data providers for the given type and its hierarchy.
*
* @param The type of interest.
* @param clazz The type's class.
*
* @return A bean meta data object for the given type.
*/
private BeanMetaDataImpl createBeanMetaData(Class clazz) {
BeanMetaDataBuilder builder = BeanMetaDataBuilder.getInstance(
constraintHelper, executableHelper, typeResolutionHelper, valueExtractorManager, parameterNameProvider, validationOrderGenerator, clazz, methodValidationConfiguration );
for ( MetaDataProvider provider : metaDataProviders ) {
for ( BeanConfiguration beanConfiguration : getBeanConfigurationForHierarchy( provider, clazz ) ) {
builder.add( beanConfiguration );
}
}
return builder.build();
}
/**
* @return returns the annotation ignores from the non annotation based meta data providers
*/
private AnnotationProcessingOptions getAnnotationProcessingOptionsFromNonDefaultProviders() {
AnnotationProcessingOptions options = new AnnotationProcessingOptionsImpl();
for ( MetaDataProvider metaDataProvider : metaDataProviders ) {
options.merge( metaDataProvider.getAnnotationProcessingOptions() );
}
return options;
}
/**
* Returns a list with the configurations for all types contained in the given type's hierarchy (including
* implemented interfaces) starting at the specified type.
*
* @param beanClass The type of interest.
* @param The type of the class to get the configurations for.
* @return A set with the configurations for the complete hierarchy of the given type. May be empty, but never
* {@code null}.
*/
private List> getBeanConfigurationForHierarchy(MetaDataProvider provider, Class beanClass) {
List> configurations = newArrayList();
for ( Class clazz : ClassHierarchyHelper.getHierarchy( beanClass ) ) {
BeanConfiguration configuration = provider.getBeanConfiguration( clazz );
if ( configuration != null ) {
configurations.add( configuration );
}
}
return configurations;
}
}