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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.jpa.graph.internal;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.persistence.AttributeNode;
import javax.persistence.metamodel.Attribute;
import javax.persistence.metamodel.ManagedType;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.graph.spi.AttributeNodeImplementor;
import org.hibernate.graph.spi.GraphNodeImplementor;
import org.hibernate.internal.util.collections.CollectionHelper;
import org.hibernate.jpa.spi.HibernateEntityManagerFactoryAware;
import org.jboss.logging.Logger;
/**
* Base class for EntityGraph and Subgraph implementations.
*
* @author Steve Ebersole
*/
public abstract class AbstractGraphNode implements GraphNodeImplementor, HibernateEntityManagerFactoryAware {
private static final Logger log = Logger.getLogger( AbstractGraphNode.class );
private final SessionFactoryImplementor sessionFactory;
private final boolean mutable;
private Map> attributeNodeMap;
@SuppressWarnings("WeakerAccess")
protected AbstractGraphNode(SessionFactoryImplementor sessionFactory, boolean mutable) {
this.sessionFactory = sessionFactory;
this.mutable = mutable;
}
@SuppressWarnings("WeakerAccess")
protected AbstractGraphNode(AbstractGraphNode original, boolean mutable) {
this.sessionFactory = original.sessionFactory;
this.mutable = mutable;
this.attributeNodeMap = makeSafeMapCopy( original.attributeNodeMap );
}
private static Map> makeSafeMapCopy(Map> attributeNodeMap) {
if ( attributeNodeMap == null ) {
return null;
}
final int properSize = CollectionHelper.determineProperSizing( attributeNodeMap );
final HashMap> copy = new HashMap<>( properSize );
for ( Map.Entry> attributeNodeEntry : attributeNodeMap.entrySet() ) {
copy.put(
attributeNodeEntry.getKey(),
( ( AttributeNodeImpl ) attributeNodeEntry.getValue() ).makeImmutableCopy()
);
}
return copy;
}
@Override
public SessionFactoryImplementor getFactory() {
return sessionFactory;
}
@Override
public List> attributeImplementorNodes() {
if ( attributeNodeMap == null ) {
return Collections.emptyList();
}
else {
return new ArrayList<>( attributeNodeMap.values() );
}
}
@Override
public List> attributeNodes() {
if ( attributeNodeMap == null ) {
return Collections.emptyList();
}
else {
return new ArrayList<>( attributeNodeMap.values() );
}
}
public void addAttributeNodes(String... attributeNames) {
for ( String attributeName : attributeNames ) {
addAttribute( attributeName );
}
}
public AttributeNodeImpl addAttribute(String attributeName) {
return addAttributeNode( buildAttributeNode( attributeName ) );
}
@SuppressWarnings("unchecked")
private AttributeNodeImpl buildAttributeNode(String attributeName) {
return buildAttributeNode( resolveAttribute( attributeName ) );
}
protected abstract Attribute resolveAttribute(String attributeName);
@SuppressWarnings("WeakerAccess")
protected AttributeNodeImpl buildAttributeNode(Attribute attribute) {
return new AttributeNodeImpl<>( sessionFactory, getManagedType(), attribute );
}
@SuppressWarnings("WeakerAccess")
protected AttributeNodeImpl addAttributeNode(AttributeNodeImpl attributeNode) {
if ( ! mutable ) {
throw new IllegalStateException( "Entity/sub graph is not mutable" );
}
if ( attributeNodeMap == null ) {
attributeNodeMap = new HashMap<>();
}
else {
final AttributeNode old = attributeNodeMap.get( attributeNode.getRegistrationName() );
if ( old != null ) {
log.debugf(
"Encountered request to add entity graph node [%s] using a name [%s] under which another " +
"node is already registered [%s]",
old.getClass().getName(),
attributeNode.getRegistrationName(),
attributeNode.getClass().getName()
);
}
}
attributeNodeMap.put( attributeNode.getRegistrationName(), attributeNode );
return attributeNode;
}
@SuppressWarnings("unchecked")
protected void addAttributeNodes(Attribute... attributes) {
for ( Attribute attribute : attributes ) {
addAttribute( attribute );
}
}
@SuppressWarnings("unchecked")
protected AttributeNodeImpl addAttribute(Attribute attribute) {
return addAttributeNode( buildAttributeNode( attribute ) );
}
@SuppressWarnings("unchecked")
public SubgraphImpl addSubgraph(Attribute attribute) {
return addAttribute( attribute ).makeSubgraph();
}
@SuppressWarnings("unchecked")
public SubgraphImpl addSubgraph(Attribute attribute, Class type) {
return addAttribute( attribute ).makeSubgraph( type );
}
@SuppressWarnings("unchecked")
public SubgraphImpl addSubgraph(String attributeName) {
return addAttribute( attributeName ).makeSubgraph();
}
@SuppressWarnings("unchecked")
public SubgraphImpl addSubgraph(String attributeName, Class type) {
return addAttribute( attributeName ).makeSubgraph( type );
}
@SuppressWarnings("unchecked")
public SubgraphImpl addKeySubgraph(Attribute attribute) {
return addAttribute( attribute ).makeKeySubgraph();
}
@SuppressWarnings("unchecked")
public SubgraphImpl addKeySubgraph(Attribute attribute, Class type) {
return addAttribute( attribute ).makeKeySubgraph( type );
}
@SuppressWarnings("unchecked")
public SubgraphImpl addKeySubgraph(String attributeName) {
return addAttribute( attributeName ).makeKeySubgraph();
}
@SuppressWarnings("unchecked")
public SubgraphImpl addKeySubgraph(String attributeName, Class type) {
return addAttribute( attributeName ).makeKeySubgraph( type );
}
@Override
public boolean containsAttribute(String name) {
return attributeNodeMap != null && attributeNodeMap.containsKey( name );
}
abstract ManagedType getManagedType();
}