//$Id: MaxValidator.java 15133 2008-08-20 10:05:57Z hardy.ferentschik $
package org.hibernate.validator;
import java.io.Serializable;
import java.math.BigDecimal;
import java.math.BigInteger;
import org.hibernate.mapping.Column;
import org.hibernate.mapping.Property;
/**
* Do check a max restriction on a numeric (whether and actual number or its string representation,
* and apply expected contraints on hibernate metadata.
*
* @author Gavin King
*/
public class MaxValidator implements Validator<Max>, PropertyConstraint, Serializable {
private long max;
public void initialize(Max parameters) {
max = parameters.value();
}
public boolean isValid(Object value) {
if ( value == null ) return true;
if ( value instanceof String ) {
try {
return new BigDecimal( (String) value ).compareTo( BigDecimal.valueOf( max ) ) <= 0;
}
catch (NumberFormatException nfe) {
return false;
}
}
else if ( ( value instanceof Double ) || ( value instanceof Float ) ) {
double dv = ( (Number) value ).doubleValue();
return dv <= max;
}
else if ( value instanceof BigInteger ) {
return ( (BigInteger) value ).compareTo( BigInteger.valueOf( max ) ) <= 0;
}
else if ( value instanceof BigDecimal ) {
return ( (BigDecimal) value ).compareTo( BigDecimal.valueOf( max ) ) <= 0;
}
else if ( value instanceof Number ) {
long lv = ( (Number) value ).longValue();
return lv <= max;
}
else {
return false;
}
}
public void apply(Property property) {
Column col = (Column) property.getColumnIterator().next();
col.setCheckConstraint( col.getName() + "<=" + max );
}
}