Performance improvement for MinValidatorForString ------------------------------------------------- Key: HV-515 URL: http://opensource.atlassian.com/projects/hibernate/browse/HV-515 Project: Hibernate Validator Issue Type: Improvement Components: validators Affects Versions: 4.2.0.Final Reporter: Henri Tremblay Assignee: Kevin Pollet Priority: Minor Labels: hibernate, validation Fix For: 4.3.0.next For a minor performance improvement, MinValidatorForString minValue can be precalculated to prevent the valueOf like it's done in DecimalMinValidatorForString (even if the JVM will probably eventually optimize it). {code:java} public class MinValidatorForString implements ConstraintValidator<Min, String> { private BigDecimal{color} minValue; // Modified: type in BigDecimal public void initialize(Min minValue) { this.minValue = BigDecimal.valueOf(minValue.value(); // Modified: Convert to BigDecimal } public boolean isValid(String value, ConstraintValidatorContext constraintValidatorContext) { //null values are valid if ( value == null ) { return true; } try { return new BigDecimal( ( String ) value ).compareTo( {color:blue}minValue{color} ) != -1; // Modified: Compare the BigDecimal directly } catch ( NumberFormatException nfe ) { return false; } } } {code} The same things applies to MaxValidatorForString.