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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.predicate;
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;
import org.hibernate.query.criteria.internal.expression.LiteralExpression;
/**
* Models a SQL LIKE expression.
*
* @author Steve Ebersole
*/
public class LikePredicate extends AbstractSimplePredicate implements Serializable {
private final Expression matchExpression;
private final Expression pattern;
private final Expression escapeCharacter;
public LikePredicate(
CriteriaBuilderImpl criteriaBuilder,
Expression matchExpression,
Expression pattern) {
this( criteriaBuilder, matchExpression, pattern, null );
}
public LikePredicate(
CriteriaBuilderImpl criteriaBuilder,
Expression matchExpression,
String pattern) {
this( criteriaBuilder, matchExpression, new LiteralExpression( criteriaBuilder, pattern) );
}
public LikePredicate(
CriteriaBuilderImpl criteriaBuilder,
Expression matchExpression,
Expression pattern,
Expression escapeCharacter) {
super( criteriaBuilder );
this.matchExpression = matchExpression;
this.pattern = pattern;
this.escapeCharacter = escapeCharacter;
}
public LikePredicate(
CriteriaBuilderImpl criteriaBuilder,
Expression matchExpression,
Expression pattern,
char escapeCharacter) {
this(
criteriaBuilder,
matchExpression,
pattern,
new LiteralExpression( criteriaBuilder, escapeCharacter )
);
}
public LikePredicate(
CriteriaBuilderImpl criteriaBuilder,
Expression matchExpression,
String pattern,
char escapeCharacter) {
this(
criteriaBuilder,
matchExpression,
new LiteralExpression( criteriaBuilder, pattern ),
new LiteralExpression( criteriaBuilder, escapeCharacter )
);
}
public LikePredicate(
CriteriaBuilderImpl criteriaBuilder,
Expression matchExpression,
String pattern,
Expression escapeCharacter) {
this(
criteriaBuilder,
matchExpression,
new LiteralExpression( criteriaBuilder, pattern ),
escapeCharacter
);
}
public Expression getEscapeCharacter() {
return escapeCharacter;
}
public Expression getMatchExpression() {
return matchExpression;
}
public Expression getPattern() {
return pattern;
}
public void registerParameters(ParameterRegistry registry) {
Helper.possibleParameter( getEscapeCharacter(), registry );
Helper.possibleParameter( getMatchExpression(), registry );
Helper.possibleParameter( getPattern(), registry );
}
@Override
public String render(boolean isNegated, RenderingContext renderingContext) {
final String operator = isNegated ? " not like " : " like ";
StringBuilder buffer = new StringBuilder();
buffer.append( ( (Renderable) getMatchExpression() ).render( renderingContext ) )
.append( operator )
.append( ( (Renderable) getPattern() ).render( renderingContext ) );
if ( escapeCharacter != null ) {
buffer.append( " escape " )
.append( ( (Renderable) getEscapeCharacter() ).render( renderingContext ) );
}
return buffer.toString();
}
}