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org.hibernate.query.criteria.internal.path.MapAttributeJoin Maven / Gradle / Ivy
/*
* 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.query.criteria.internal.path;
import java.io.Serializable;
import java.util.Map;
import javax.persistence.criteria.Expression;
import javax.persistence.criteria.JoinType;
import javax.persistence.criteria.Path;
import javax.persistence.criteria.Predicate;
import javax.persistence.metamodel.ManagedType;
import javax.persistence.metamodel.MapAttribute;
import org.hibernate.query.criteria.internal.CriteriaBuilderImpl;
import org.hibernate.query.criteria.internal.CriteriaSubqueryImpl;
import org.hibernate.query.criteria.internal.FromImplementor;
import org.hibernate.query.criteria.internal.MapJoinImplementor;
import org.hibernate.query.criteria.internal.PathImplementor;
import org.hibernate.query.criteria.internal.PathSource;
import org.hibernate.query.criteria.internal.compile.RenderingContext;
import org.hibernate.query.criteria.internal.expression.MapEntryExpression;
/**
* Models a join based on a map-style plural association attribute.
*
* @author Steve Ebersole
*/
public class MapAttributeJoin
extends PluralAttributeJoinSupport, V>
implements MapJoinImplementor, Serializable {
public MapAttributeJoin(
CriteriaBuilderImpl criteriaBuilder,
Class javaType,
PathSource pathSource,
MapAttribute joinAttribute,
JoinType joinType) {
super( criteriaBuilder, javaType, pathSource, joinAttribute, joinType );
}
@Override
public MapAttribute getAttribute() {
return (MapAttribute) super.getAttribute();
}
@Override
public MapAttribute getModel() {
return getAttribute();
}
@Override
public final MapAttributeJoin correlateTo(CriteriaSubqueryImpl subquery) {
return (MapAttributeJoin) super.correlateTo( subquery );
}
@Override
protected FromImplementor createCorrelationDelegate() {
return new MapAttributeJoin(
criteriaBuilder(),
getJavaType(),
(PathImplementor) getParentPath(),
getAttribute(),
getJoinType()
);
}
@Override
public Path value() {
return this;
}
@Override
@SuppressWarnings({ "unchecked" })
public Expression> entry() {
return new MapEntryExpression( criteriaBuilder(), Map.Entry.class, this, getAttribute() );
}
@Override
@SuppressWarnings({ "unchecked" })
public Path key() {
final MapKeyHelpers.MapKeySource mapKeySource = new MapKeyHelpers.MapKeySource(
criteriaBuilder(),
getAttribute().getJavaType(),
this,
getAttribute()
);
final MapKeyHelpers.MapKeyAttribute mapKeyAttribute = new MapKeyHelpers.MapKeyAttribute( criteriaBuilder(), getAttribute() );
return new MapKeyHelpers.MapKeyPath( criteriaBuilder(), mapKeySource, mapKeyAttribute );
}
@Override
public MapJoinImplementor on(Predicate... restrictions) {
return (MapJoinImplementor) super.on( restrictions );
}
@Override
public MapJoinImplementor on(Expression restriction) {
return (MapJoinImplementor) super.on( restriction );
}
@Override
public MapAttributeJoin treatAs(Class treatAsType) {
return new TreatedMapAttributeJoin( this, treatAsType );
}
public static class TreatedMapAttributeJoin extends MapAttributeJoin {
private final MapAttributeJoin original;
protected final Class treatAsType;
@SuppressWarnings("unchecked")
public TreatedMapAttributeJoin(MapAttributeJoin original, Class treatAsType) {
super(
original.criteriaBuilder(),
treatAsType,
original.getPathSource(),
(MapAttribute) original.getAttribute(),
original.getJoinType()
);
this.original = original;
this.treatAsType = treatAsType;
}
@Override
public String getAlias() {
return isCorrelated() ? getCorrelationParent().getAlias() : super.getAlias();
}
@Override
public void prepareAlias(RenderingContext renderingContext) {
if ( getAlias() == null ) {
if ( isCorrelated() ) {
setAlias( getCorrelationParent().getAlias() );
}
else {
setAlias( renderingContext.generateAlias() );
}
}
}
@Override
protected void setAlias(String alias) {
super.setAlias( alias );
original.setAlias( alias );
}
@Override
public String render(RenderingContext renderingContext) {
return "treat(" + original.render( renderingContext ) + " as " + treatAsType.getName() + ")";
}
@Override
protected ManagedType locateManagedType() {
return criteriaBuilder().getEntityManagerFactory().getMetamodel().managedType( treatAsType );
}
@Override
public String getPathIdentifier() {
return "treat(" + getAlias() + " as " + treatAsType.getName() + ")";
}
@Override
protected PathSource getPathSourceForSubPaths() {
return this;
}
}
}