//$Id: SimpleExpression.java 7641 2005-07-25 04:57:05Z oneovthafew $
package org.hibernate.criterion;
import java.sql.Types;
import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.engine.SessionFactoryImplementor;
import org.hibernate.engine.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;
}
public SimpleExpression ignoreCase() {
ignoreCase = true;
return this;
}
public String toSqlString(Criteria criteria, CriteriaQuery criteriaQuery)
throws HibernateException {
String[] columns = criteriaQuery.getColumnsUsingProjection(criteria, propertyName);
Type type = criteriaQuery.getTypeUsingProjection(criteria, propertyName);
StringBuffer fragment = new StringBuffer();
if (columns.length>1) fragment.append('(');
SessionFactoryImplementor factory = criteriaQuery.getFactory();
int[] sqlTypes = type.sqlTypes( factory );
for ( int i=0; i<columns.length; i++ ) {
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();
}
public TypedValue[] getTypedValues(Criteria criteria, CriteriaQuery criteriaQuery)
throws HibernateException {
Object icvalue = ignoreCase ? value.toString().toLowerCase() : value;
return new TypedValue[] { criteriaQuery.getTypedValue(criteria, propertyName, icvalue) };
}
public String toString() {
return propertyName + getOp() + value;
}
protected final String getOp() {
return op;
}
}