*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ---------------
* ExpressionFunctionSign.java
* ---------------
* Author: Volker Berlin
*
* Created on 21.06.2004
*/
package smallsql.database;
final class ExpressionFunctionSign extends ExpressionFunctionReturnInt {
final int getFunction() {
return SQLTokenizer.SIGN;
}
final int getInt() throws Exception {
if(param1.isNull()) return 0;
switch(ExpressionArithmetic.getBestNumberDataType(param1.getDataType())){
case SQLTokenizer.INT:
int intValue = param1.getInt();
if(intValue < 0)
return -1;
if(intValue > 0)
return 1;
return 0;
case SQLTokenizer.BIGINT:
long longValue = param1.getLong();
if(longValue < 0)
return -1;
if(longValue > 0)
return 1;
return 0;
case SQLTokenizer.MONEY:
longValue = param1.getMoney();
if(longValue < 0)
return -1;
if(longValue > 0)
return 1;
return 0;
case SQLTokenizer.DECIMAL:
return param1.getNumeric().signum;
case SQLTokenizer.DOUBLE:
double doubleValue = param1.getDouble();
if(doubleValue < 0)
return -1;
if(doubleValue > 0)
return 1;
return 0;
default:
throw new Error();
}
}
}