/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.cocoon.components.elementprocessor.types;
import java.io.IOException;
/**
* This interface allows a client of NumericConverter to apply more
* restrictive rules to the number that the NumericConverter obtained.
*
* @author Marc Johnson (marc_johnson27591@hotmail.com)
* @version CVS $Id$
*/
public interface Validator
{
/**
* Is this number valid? If so, return a null
* IOException. Otherwise, return an IOException whose message
* explains why the number is not valid.
*
* @param number the Number holding the value. Guaranteed non-null
*
* @return a null IOException if the value is ok, else a real
* IOException
*/
public IOException validate(final Number number);
} // end public interface Validator