//$Id: RangeValidator.java 15133 2008-08-20 10:05:57Z hardy.ferentschik $
package org.hibernate.validator;
import java.io.Serializable;
import java.math.BigDecimal;
import org.hibernate.mapping.Column;
import org.hibernate.mapping.Property;
/**
* The value has to be in a defined range, the constraint is also applied on DB
*
* @author Gavin King
*/
public class RangeValidator implements Validator<Range>, PropertyConstraint, Serializable {
private long max;
private long min;
public void initialize(Range parameters) {
max = parameters.max();
min = parameters.min();
}
public boolean isValid(Object value) {
if ( value == null ) return true;
if ( value instanceof String ) {
try {
BigDecimal dv = new BigDecimal( (String) value );
return dv.compareTo( BigDecimal.valueOf( min ) ) >= 0 && dv.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 >= min && dv <= max;
}
else if ( value instanceof Number ) {
long lv = ( (Number) value ).longValue();
return lv >= min && lv <= max;
}
else {
return false;
}
}
public void apply(Property property) {
Column col = (Column) property.getColumnIterator().next();
String check = "";
if ( min != Long.MIN_VALUE ) check += col.getName() + ">=" + min;
if ( max != Long.MAX_VALUE && min != Long.MIN_VALUE ) check += " and ";
if ( max != Long.MAX_VALUE ) check += col.getName() + "<=" + max;
col.setCheckConstraint( check );
}
}