//$Id: $
package org.hibernate.validator;
import java.math.BigDecimal;
import java.math.BigInteger;
import org.hibernate.mapping.Property;
import org.hibernate.mapping.Column;
/**
* Validate a Digit to check if it matches the according pattern
*
* @author Norman Richards
* @author Emmanuel Bernard
*/
public class DigitsValidator implements Validator<Digits>, PropertyConstraint {
int integerDigits;
int fractionalDigits;
public void initialize(Digits configuration) {
integerDigits = configuration.integerDigits();
fractionalDigits = configuration.fractionalDigits();
}
public boolean isValid(Object value) {
if ( value == null ) {
return true;
}
String stringValue = null;
if ( value instanceof String ) {
try {
stringValue = stringValue( new BigDecimal( (String) value ) );
}
catch (NumberFormatException nfe) {
return false;
}
}
else if ( value instanceof BigDecimal ) {
stringValue = stringValue( (BigDecimal) value );
}
else if ( value instanceof BigInteger ) {
stringValue = stringValue( (BigInteger) value );
}
else if ( value instanceof Number ) {
//yukky
stringValue = stringValue( new BigDecimal( ( (Number) value ).toString() ) );
}
else {
return false;
}
int pos = stringValue.indexOf( "." );
int left = ( pos == -1 ) ?
stringValue.length() :
pos;
int right = ( pos == -1 ) ?
0 :
stringValue.length() - pos - 1;
if ( left == 1 && stringValue.charAt( 0 ) == '0' ) {
left--;
}
return !( left > integerDigits || right > fractionalDigits );
}
private String stringValue(BigDecimal number) {
return number.abs().stripTrailingZeros().toPlainString();
}
private String stringValue(BigInteger number) {
return number.abs().toString();
}
public void apply(Property property) {
Column col = (Column) property.getColumnIterator().next();
col.setPrecision( integerDigits + fractionalDigits );
col.setScale( fractionalDigits );
}
}