PositiveInteger.java

/**
 * Copyright (C) 2011 the original author or authors.
 * See the notice.md file distributed with this work for additional
 * information regarding copyright ownership.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.beust.jcommander.validators;

import com.beust.jcommander.IParameterValidator;
import com.beust.jcommander.ParameterException;

/**
 * A validator that makes sure the value of the parameter is a positive integer.
 *
 * @author Cedric Beust <cedric@beust.com>
 */
public class PositiveInteger implements IParameterValidator {

  public void validate(String name, String value)
      throws ParameterException {
    int n = Integer.parseInt(value);
    if (n < 0) {
      throw new ParameterException("Parameter " + name
          + " should be positive (found " + value +")");
    }
  }

}