org.hibernate.query.criteria.internal.expression.MapEntryExpression Maven / Gradle / Ivy
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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.query.criteria.internal.expression;
import java.io.Serializable;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import javax.persistence.criteria.CompoundSelection;
import javax.persistence.criteria.Selection;
import org.hibernate.query.criteria.internal.CriteriaBuilderImpl;
import org.hibernate.query.criteria.internal.ParameterRegistry;
import org.hibernate.query.criteria.internal.compile.RenderingContext;
import org.hibernate.query.criteria.internal.path.MapAttributeJoin;
import org.hibernate.sql.ast.Clause;
/**
* TODO : javadoc
*
* @author Steve Ebersole
*/
public class MapEntryExpression
extends ExpressionImpl>
implements CompoundSelection>, Serializable {
private final MapAttributeJoin original;
public MapEntryExpression(
CriteriaBuilderImpl criteriaBuilder,
Class> javaType,
MapAttributeJoin original) {
super( criteriaBuilder, javaType );
this.original = original;
}
@Override
public void registerParameters(ParameterRegistry registry) {
// none to register
}
@Override
public String render(RenderingContext renderingContext) {
if ( renderingContext.getClauseStack().getCurrent() == Clause.SELECT ) {
return "entry(" + original.render( renderingContext ) + ")";
}
// don't think this is valid outside of select clause...
throw new IllegalStateException( "illegal reference to map entry outside of select clause." );
}
@Override
public boolean isCompoundSelection() {
return true;
}
@Override
public List> getCompoundSelectionItems() {
return Arrays.asList( original.key(), original.value() );
}
}