org.hibernate.metamodel.binding.ManyToOneAttributeBinding 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
*/
package org.hibernate.metamodel.binding;
import java.util.ArrayList;
import java.util.List;
import org.hibernate.AssertionFailure;
import org.hibernate.FetchMode;
import org.hibernate.engine.FetchStyle;
import org.hibernate.engine.FetchTiming;
import org.hibernate.engine.spi.CascadeStyle;
import org.hibernate.metamodel.domain.SingularAttribute;
/**
* TODO : javadoc
*
* @author Gail Badner
* @author Steve Ebersole
*/
public class ManyToOneAttributeBinding extends BasicAttributeBinding implements SingularAssociationAttributeBinding {
private String referencedEntityName;
private String referencedAttributeName;
private AttributeBinding referencedAttributeBinding;
private boolean isLogicalOneToOne;
private String foreignKeyName;
private CascadeStyle cascadeStyle;
private FetchTiming fetchTiming;
private FetchStyle fetchStyle;
ManyToOneAttributeBinding(AttributeBindingContainer container, SingularAttribute attribute) {
super( container, attribute, false, false );
}
@Override
public boolean isAssociation() {
return true;
}
@Override
public final boolean isPropertyReference() {
return referencedAttributeName != null;
}
@Override
public final String getReferencedEntityName() {
return referencedEntityName;
}
@Override
public void setReferencedEntityName(String referencedEntityName) {
this.referencedEntityName = referencedEntityName;
}
@Override
public final String getReferencedAttributeName() {
return referencedAttributeName;
}
@Override
public void setReferencedAttributeName(String referencedEntityAttributeName) {
this.referencedAttributeName = referencedEntityAttributeName;
}
@Override
public CascadeStyle getCascadeStyle() {
return cascadeStyle;
}
@Override
public void setCascadeStyles(Iterable cascadeStyles) {
List cascadeStyleList = new ArrayList();
for ( CascadeStyle style : cascadeStyles ) {
if ( style != CascadeStyle.NONE ) {
cascadeStyleList.add( style );
}
}
if ( cascadeStyleList.isEmpty() ) {
cascadeStyle = CascadeStyle.NONE;
}
else if ( cascadeStyleList.size() == 1 ) {
cascadeStyle = cascadeStyleList.get( 0 );
}
else {
cascadeStyle = new CascadeStyle.MultipleCascadeStyle(
cascadeStyleList.toArray( new CascadeStyle[ cascadeStyleList.size() ] )
);
}
}
@Override
public FetchTiming getFetchTiming() {
return fetchTiming;
}
@Override
public void setFetchTiming(FetchTiming fetchTiming) {
this.fetchTiming = fetchTiming;
}
@Override
public FetchStyle getFetchStyle() {
return fetchStyle;
}
@Override
public void setFetchStyle(FetchStyle fetchStyle) {
if ( fetchStyle == FetchStyle.SUBSELECT ) {
throw new AssertionFailure( "Subselect fetching not yet supported for singular associations" );
}
this.fetchStyle = fetchStyle;
}
@Override
public FetchMode getFetchMode() {
if ( fetchStyle == FetchStyle.JOIN ) {
return FetchMode.JOIN;
}
else if ( fetchStyle == FetchStyle.SELECT ) {
return FetchMode.SELECT;
}
else if ( fetchStyle == FetchStyle.BATCH ) {
// we need the subsequent select...
return FetchMode.SELECT;
}
throw new AssertionFailure( "Unexpected fetch style : " + fetchStyle.name() );
}
@Override
public final boolean isReferenceResolved() {
return referencedAttributeBinding != null;
}
@Override
public final void resolveReference(AttributeBinding referencedAttributeBinding) {
if ( ! EntityBinding.class.isInstance( referencedAttributeBinding.getContainer() ) ) {
throw new AssertionFailure( "Illegal attempt to resolve many-to-one reference based on non-entity attribute" );
}
final EntityBinding entityBinding = (EntityBinding) referencedAttributeBinding.getContainer();
if ( !referencedEntityName.equals( entityBinding.getEntity().getName() ) ) {
throw new IllegalStateException(
"attempt to set EntityBinding with name: [" +
entityBinding.getEntity().getName() +
"; entity name should be: " + referencedEntityName
);
}
if ( referencedAttributeName == null ) {
referencedAttributeName = referencedAttributeBinding.getAttribute().getName();
}
else if ( !referencedAttributeName.equals( referencedAttributeBinding.getAttribute().getName() ) ) {
throw new IllegalStateException(
"Inconsistent attribute name; expected: " + referencedAttributeName +
"actual: " + referencedAttributeBinding.getAttribute().getName()
);
}
this.referencedAttributeBinding = referencedAttributeBinding;
// buildForeignKey();
}
@Override
public AttributeBinding getReferencedAttributeBinding() {
if ( !isReferenceResolved() ) {
throw new IllegalStateException( "Referenced AttributeBiding has not been resolved." );
}
return referencedAttributeBinding;
}
@Override
public final EntityBinding getReferencedEntityBinding() {
return (EntityBinding) referencedAttributeBinding.getContainer();
}
// private void buildForeignKey() {
// // TODO: move this stuff to relational model
// ForeignKey foreignKey = getValue().getTable()
// .createForeignKey( referencedAttributeBinding.getValue().getTable(), foreignKeyName );
// Iterator referencingValueIterator = getSimpleValues().iterator();
// Iterator targetValueIterator = referencedAttributeBinding.getSimpleValues().iterator();
// while ( referencingValueIterator.hasNext() ) {
// if ( !targetValueIterator.hasNext() ) {
// // TODO: improve this message
// throw new MappingException(
// "number of values in many-to-one reference is greater than number of values in target"
// );
// }
// SimpleValue referencingValue = referencingValueIterator.next();
// SimpleValue targetValue = targetValueIterator.next();
// if ( Column.class.isInstance( referencingValue ) ) {
// if ( !Column.class.isInstance( targetValue ) ) {
// // TODO improve this message
// throw new MappingException( "referencing value is a column, but target is not a column" );
// }
// foreignKey.addColumnMapping( Column.class.cast( referencingValue ), Column.class.cast( targetValue ) );
// }
// else if ( Column.class.isInstance( targetValue ) ) {
// // TODO: improve this message
// throw new MappingException( "referencing value is not a column, but target is a column." );
// }
// }
// if ( targetValueIterator.hasNext() ) {
// throw new MappingException( "target value has more simple values than referencing value" );
// }
// }
//
// public void validate() {
// // can't check this until both the domain and relational states are initialized...
// if ( getCascadeTypes().contains( CascadeType.DELETE_ORPHAN ) ) {
// if ( !isLogicalOneToOne ) {
// throw new MappingException(
// "many-to-one attribute [" + locateAttribute().getName() + "] does not support orphan delete as it is not unique"
// );
// }
// }
// //TODO: validate that the entity reference is resolved
// }
}