org.hibernate.cfg.PropertyContainer Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
// $Id$
package org.hibernate.cfg;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import javax.persistence.Access;
import javax.persistence.ManyToMany;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.OneToOne;
import javax.persistence.Transient;
import org.jboss.logging.Logger;
import org.hibernate.AnnotationException;
import org.hibernate.MappingException;
import org.hibernate.annotations.ManyToAny;
import org.hibernate.annotations.Target;
import org.hibernate.annotations.Type;
import org.hibernate.annotations.common.reflection.XClass;
import org.hibernate.annotations.common.reflection.XProperty;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.internal.util.StringHelper;
/**
* A helper class to keep the {@code XProperty}s of a class ordered by access type.
*
* @author Hardy Ferentschik
*/
class PropertyContainer {
static {
System.setProperty("jboss.i18n.generate-proxies", "true");
}
private static final CoreMessageLogger LOG = Logger.getMessageLogger(CoreMessageLogger.class, PropertyContainer.class.getName());
private final AccessType explicitClassDefinedAccessType;
/**
* Constains the properties which must be returned in case the class is accessed via {@code AccessType.FIELD}. Note,
* this does not mean that all {@code XProperty}s in this map are fields. Due to JPA access rules single properties
* can have different access type than the overall class access type.
*/
private final TreeMap fieldAccessMap;
/**
* Constains the properties which must be returned in case the class is accessed via {@code AccessType.Property}. Note,
* this does not mean that all {@code XProperty}s in this map are properties/methods. Due to JPA access rules single properties
* can have different access type than the overall class access type.
*/
private final TreeMap propertyAccessMap;
/**
* The class for which this container is created.
*/
private final XClass xClass;
private final XClass entityAtStake;
PropertyContainer(XClass clazz, XClass entityAtStake) {
this.xClass = clazz;
this.entityAtStake = entityAtStake;
explicitClassDefinedAccessType = determineClassDefinedAccessStrategy();
// first add all properties to field and property map
fieldAccessMap = initProperties( AccessType.FIELD );
propertyAccessMap = initProperties( AccessType.PROPERTY );
considerExplicitFieldAndPropertyAccess();
}
public XClass getEntityAtStake() {
return entityAtStake;
}
public XClass getDeclaringClass() {
return xClass;
}
public AccessType getExplicitAccessStrategy() {
return explicitClassDefinedAccessType;
}
public boolean hasExplicitAccessStrategy() {
return !explicitClassDefinedAccessType.equals( AccessType.DEFAULT );
}
public Collection getProperties(AccessType accessType) {
assertTypesAreResolvable( accessType );
if ( AccessType.DEFAULT == accessType || AccessType.PROPERTY == accessType ) {
return Collections.unmodifiableCollection( propertyAccessMap.values() );
}
else {
return Collections.unmodifiableCollection( fieldAccessMap.values() );
}
}
private void assertTypesAreResolvable(AccessType access) {
Map xprops;
if ( AccessType.PROPERTY.equals( access ) || AccessType.DEFAULT.equals( access ) ) {
xprops = propertyAccessMap;
}
else {
xprops = fieldAccessMap;
}
for ( XProperty property : xprops.values() ) {
if ( !property.isTypeResolved() && !discoverTypeWithoutReflection( property ) ) {
String msg = "Property " + StringHelper.qualify( xClass.getName(), property.getName() ) +
" has an unbound type and no explicit target entity. Resolve this Generic usage issue" +
" or set an explicit target attribute (eg @OneToMany(target=) or use an explicit @Type";
throw new AnnotationException( msg );
}
}
}
private void considerExplicitFieldAndPropertyAccess() {
for ( XProperty property : fieldAccessMap.values() ) {
Access access = property.getAnnotation( Access.class );
if ( access == null ) {
continue;
}
// see "2.3.2 Explicit Access Type" of JPA 2 spec
// the access type for this property is explicitly set to AccessType.FIELD, hence we have to
// use field access for this property even if the default access type for the class is AccessType.PROPERTY
AccessType accessType = AccessType.getAccessStrategy( access.value() );
if (accessType == AccessType.FIELD) {
propertyAccessMap.put(property.getName(), property);
}
else {
LOG.debug( "Placing @Access(AccessType.FIELD) on a field does not have any effect." );
}
}
for ( XProperty property : propertyAccessMap.values() ) {
Access access = property.getAnnotation( Access.class );
if ( access == null ) {
continue;
}
AccessType accessType = AccessType.getAccessStrategy( access.value() );
// see "2.3.2 Explicit Access Type" of JPA 2 spec
// the access type for this property is explicitly set to AccessType.PROPERTY, hence we have to
// return use method access even if the default class access type is AccessType.FIELD
if (accessType == AccessType.PROPERTY) {
fieldAccessMap.put(property.getName(), property);
}
else {
LOG.debug( "Placing @Access(AccessType.PROPERTY) on a field does not have any effect." );
}
}
}
/**
* Retrieves all properties from the {@code xClass} with the specified access type. This method does not take
* any jpa access rules/annotations into account yet.
*
* @param access The access type - {@code AccessType.FIELD} or {@code AccessType.Property}
*
* @return A maps of the properties with the given access type keyed against their property name
*/
private TreeMap initProperties(AccessType access) {
if ( !( AccessType.PROPERTY.equals( access ) || AccessType.FIELD.equals( access ) ) ) {
throw new IllegalArgumentException( "Access type has to be AccessType.FIELD or AccessType.Property" );
}
//order so that property are used in the same order when binding native query
TreeMap propertiesMap = new TreeMap();
List properties = xClass.getDeclaredProperties( access.getType() );
for ( XProperty property : properties ) {
if ( mustBeSkipped( property ) ) {
continue;
}
propertiesMap.put( property.getName(), property );
}
return propertiesMap;
}
private AccessType determineClassDefinedAccessStrategy() {
AccessType classDefinedAccessType;
AccessType hibernateDefinedAccessType = AccessType.DEFAULT;
AccessType jpaDefinedAccessType = AccessType.DEFAULT;
org.hibernate.annotations.AccessType accessType = xClass.getAnnotation( org.hibernate.annotations.AccessType.class );
if ( accessType != null ) {
hibernateDefinedAccessType = AccessType.getAccessStrategy( accessType.value() );
}
Access access = xClass.getAnnotation( Access.class );
if ( access != null ) {
jpaDefinedAccessType = AccessType.getAccessStrategy( access.value() );
}
if ( hibernateDefinedAccessType != AccessType.DEFAULT
&& jpaDefinedAccessType != AccessType.DEFAULT
&& hibernateDefinedAccessType != jpaDefinedAccessType ) {
throw new MappingException(
"@AccessType and @Access specified with contradicting values. Use of @Access only is recommended. "
);
}
if ( hibernateDefinedAccessType != AccessType.DEFAULT ) {
classDefinedAccessType = hibernateDefinedAccessType;
}
else {
classDefinedAccessType = jpaDefinedAccessType;
}
return classDefinedAccessType;
}
private static boolean discoverTypeWithoutReflection(XProperty p) {
if ( p.isAnnotationPresent( OneToOne.class ) && !p.getAnnotation( OneToOne.class )
.targetEntity()
.equals( void.class ) ) {
return true;
}
else if ( p.isAnnotationPresent( OneToMany.class ) && !p.getAnnotation( OneToMany.class )
.targetEntity()
.equals( void.class ) ) {
return true;
}
else if ( p.isAnnotationPresent( ManyToOne.class ) && !p.getAnnotation( ManyToOne.class )
.targetEntity()
.equals( void.class ) ) {
return true;
}
else if ( p.isAnnotationPresent( ManyToMany.class ) && !p.getAnnotation( ManyToMany.class )
.targetEntity()
.equals( void.class ) ) {
return true;
}
else if ( p.isAnnotationPresent( org.hibernate.annotations.Any.class ) ) {
return true;
}
else if ( p.isAnnotationPresent( ManyToAny.class ) ) {
if ( !p.isCollection() && !p.isArray() ) {
throw new AnnotationException( "@ManyToAny used on a non collection non array property: " + p.getName() );
}
return true;
}
else if ( p.isAnnotationPresent( Type.class ) ) {
return true;
}
else if ( p.isAnnotationPresent( Target.class ) ) {
return true;
}
return false;
}
private static boolean mustBeSkipped(XProperty property) {
//TODO make those hardcoded tests more portable (through the bytecode provider?)
return property.isAnnotationPresent( Transient.class )
|| "net.sf.cglib.transform.impl.InterceptFieldCallback".equals( property.getType().getName() )
|| "org.hibernate.bytecode.internal.javassist.FieldHandler".equals( property.getType().getName() );
}
}