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Bench support.

There is a newer version: 0.2.1

package cdc.bench.support.checks;

public class IntegerChecker implements Checker {
   private final int min;
   private final int max;

   public static final IntegerChecker INT_INSTANCE = new IntegerChecker();
   public static final IntegerChecker NAT_INSTANCE = new IntegerChecker(0, Integer.MAX_VALUE);
   public static final IntegerChecker POS_INSTANCE = new IntegerChecker(1, Integer.MAX_VALUE);

   public IntegerChecker() {
      this.min = Integer.MIN_VALUE;
      this.max = Integer.MAX_VALUE;
   }

   public IntegerChecker(int min,
                         int max) {
      this.min = min;
      this.max = max;
   }

   @Override
   public CheckResult check(String value) {
      try {
         final int x = Integer.parseInt(value);
         if (x < min) {
            return new CheckResult(CheckResult.Status.ERROR, "Too small integer: " + x);
         } else if (x > max) {
            return new CheckResult(CheckResult.Status.ERROR, "Too large integer: " + x);
         } else {
            return new CheckResult(CheckResult.Status.OK, value);
         }
      } catch (final NumberFormatException e) {
         return new CheckResult(CheckResult.Status.ERROR, "Invalid integer literal: " + value);
      }
   }
}