/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2009 by Red Hat Inc and/or its affiliates or by
* third-party contributors as indicated by either @author tags or express
* copyright attribution statements applied by the authors. All
* third-party contributions are distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.ejb.criteria.predicate;
import java.io.Serializable;
import javax.persistence.criteria.Expression;
import org.hibernate.ejb.criteria.CriteriaBuilderImpl;
import org.hibernate.ejb.criteria.CriteriaQueryCompiler;
import org.hibernate.ejb.criteria.ParameterRegistry;
import org.hibernate.ejb.criteria.Renderable;
import org.hibernate.ejb.criteria.expression.LiteralExpression;
/**
* Models a SQL <tt>LIKE</tt> expression.
*
* @author Steve Ebersole
*/
public class LikePredicate extends AbstractSimplePredicate implements Serializable {
private final Expression<String> matchExpression;
private final Expression<String> pattern;
private final Expression<Character> escapeCharacter;
public LikePredicate(
CriteriaBuilderImpl criteriaBuilder,
Expression<String> matchExpression,
Expression<String> pattern) {
this( criteriaBuilder, matchExpression, pattern, null );
}
public LikePredicate(
CriteriaBuilderImpl criteriaBuilder,
Expression<String> matchExpression,
String pattern) {
this( criteriaBuilder, matchExpression, new LiteralExpression<String>( criteriaBuilder, pattern) );
}
public LikePredicate(
CriteriaBuilderImpl criteriaBuilder,
Expression<String> matchExpression,
Expression<String> pattern,
Expression<Character> escapeCharacter) {
super( criteriaBuilder );
this.matchExpression = matchExpression;
this.pattern = pattern;
this.escapeCharacter = escapeCharacter;
}
public LikePredicate(
CriteriaBuilderImpl criteriaBuilder,
Expression<String> matchExpression,
Expression<String> pattern,
char escapeCharacter) {
this(
criteriaBuilder,
matchExpression,
pattern,
new LiteralExpression<Character>( criteriaBuilder, escapeCharacter )
);
}
public LikePredicate(
CriteriaBuilderImpl criteriaBuilder,
Expression<String> matchExpression,
String pattern,
char escapeCharacter) {
this(
criteriaBuilder,
matchExpression,
new LiteralExpression<String>( criteriaBuilder, pattern ),
new LiteralExpression<Character>( criteriaBuilder, escapeCharacter )
);
}
public LikePredicate(
CriteriaBuilderImpl criteriaBuilder,
Expression<String> matchExpression,
String pattern,
Expression<Character> escapeCharacter) {
this(
criteriaBuilder,
matchExpression,
new LiteralExpression<String>( criteriaBuilder, pattern ),
escapeCharacter
);
}
public Expression<Character> getEscapeCharacter() {
return escapeCharacter;
}
public Expression<String> getMatchExpression() {
return matchExpression;
}
public Expression<String> getPattern() {
return pattern;
}
public void registerParameters(ParameterRegistry registry) {
Helper.possibleParameter( getEscapeCharacter(), registry );
Helper.possibleParameter( getMatchExpression(), registry );
Helper.possibleParameter( getPattern(), registry );
}
public String render(CriteriaQueryCompiler.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();
}
public String renderProjection(CriteriaQueryCompiler.RenderingContext renderingContext) {
return render( renderingContext );
}
}