/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, 2012, Red Hat Inc. or third-party contributors as
* indicated by the @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.criterion;
import java.sql.Types;
import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.engine.spi.TypedValue;
import org.hibernate.type.Type;
/**
* superclass for "simple" comparisons (with SQL binary operators)
*
* @author Gavin King
*/
public class SimpleExpression implements Criterion {
private final String propertyName;
private final Object value;
private boolean ignoreCase;
private final String op;
protected SimpleExpression(String propertyName, Object value, String op) {
this.propertyName = propertyName;
this.value = value;
this.op = op;
}
protected SimpleExpression(String propertyName, Object value, String op, boolean ignoreCase) {
this.propertyName = propertyName;
this.value = value;
this.ignoreCase = ignoreCase;
this.op = op;
}
protected final String getOp() {
return op;
}
public String getPropertyName() {
return propertyName;
}
public Object getValue() {
return value;
}
/**
* Make case insensitive. No effect for non-String values
*
* @return {@code this}, for method chaining
*/
public SimpleExpression ignoreCase() {
ignoreCase = true;
return this;
}
@Override
public String toSqlString(Criteria criteria, CriteriaQuery criteriaQuery) throws HibernateException {
final String[] columns = criteriaQuery.findColumns( propertyName, criteria );
final Type type = criteriaQuery.getTypeUsingProjection( criteria, propertyName );
final StringBuilder fragment = new StringBuilder();
if ( columns.length > 1 ) {
fragment.append( '(' );
}
final SessionFactoryImplementor factory = criteriaQuery.getFactory();
final int[] sqlTypes = type.sqlTypes( factory );
for ( int i = 0; i < columns.length; i++ ) {
final boolean lower = ignoreCase && (sqlTypes[i] == Types.VARCHAR || sqlTypes[i] == Types.CHAR);
if ( lower ) {
fragment.append( factory.getDialect().getLowercaseFunction() ).append( '(' );
}
fragment.append( columns[i] );
if ( lower ) {
fragment.append( ')' );
}
fragment.append( getOp() ).append( "?" );
if ( i < columns.length - 1 ) {
fragment.append( " and " );
}
}
if ( columns.length > 1 ) {
fragment.append( ')' );
}
return fragment.toString();
}
@Override
public TypedValue[] getTypedValues(Criteria criteria, CriteriaQuery criteriaQuery) throws HibernateException {
final Object casedValue = ignoreCase ? value.toString().toLowerCase() : value;
return new TypedValue[] { criteriaQuery.getTypedValue( criteria, propertyName, casedValue ) };
}
@Override
public String toString() {
return propertyName + getOp() + value;
}
}