/*
 * Copyright (c) 2015 TextGlass
 *
 * 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.
 *
 */

public class TransformerIsNumber implements Transformer {
  @Override
  public String transform(String input) throws Exception {
    try {
      Double.parseDouble(input);
    } catch(NumberFormatException nfe) {
      throw new Exception(nfe.toString());
    }
    
    return input;
  }

  @Override
  public String toString() {
    return "TransformerIsNumber";
  }
}
