org.hibernate.query.criteria.internal.expression.ConcatExpression 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.expression;
import java.io.Serializable;
import javax.persistence.criteria.Expression;
import org.hibernate.query.criteria.internal.CriteriaBuilderImpl;
import org.hibernate.query.criteria.internal.ParameterRegistry;
import org.hibernate.query.criteria.internal.Renderable;
import org.hibernate.query.criteria.internal.compile.RenderingContext;
/**
* A string concatenation.
*
* @author Steve Ebersole
*/
public class ConcatExpression extends ExpressionImpl implements Serializable {
private Expression string1;
private Expression string2;
public ConcatExpression(
CriteriaBuilderImpl criteriaBuilder,
Expression expression1,
Expression expression2) {
super( criteriaBuilder, String.class );
this.string1 = expression1;
this.string2 = expression2;
}
public ConcatExpression(
CriteriaBuilderImpl criteriaBuilder,
Expression string1,
String string2) {
this( criteriaBuilder, string1, wrap( criteriaBuilder, string2) );
}
private static Expression wrap(CriteriaBuilderImpl criteriaBuilder, String string) {
return new LiteralExpression( criteriaBuilder, string );
}
public ConcatExpression(
CriteriaBuilderImpl criteriaBuilder,
String string1,
Expression string2) {
this( criteriaBuilder, wrap( criteriaBuilder, string1), string2 );
}
public Expression getString1() {
return string1;
}
public Expression getString2() {
return string2;
}
public void registerParameters(ParameterRegistry registry) {
Helper.possibleParameter( getString1(), registry );
Helper.possibleParameter( getString2(), registry );
}
public String render(RenderingContext renderingContext) {
return '(' + ((Renderable) getString1() ).render( renderingContext )
+ " || "
+ ( (Renderable) getString2() ).render( renderingContext ) + ')' ;
}
public String renderProjection(RenderingContext renderingContext) {
return render( renderingContext );
}
}