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Java > Open Source Codes > org > apache > cocoon > components > elementprocessor > types > Validator


1 /*
2  * Copyright 1999-2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */

16
17 package org.apache.cocoon.components.elementprocessor.types;
18
19 import java.io.IOException JavaDoc;
20
21 /**
22  * This interface allows a client of NumericConverter to apply more
23  * restrictive rules to the number that the NumericConverter obtained.
24  *
25  * @author Marc Johnson (marc_johnson27591@hotmail.com)
26  * @version CVS $Id: Validator.java 30932 2004-07-29 17:35:38Z vgritsenko $
27  */

28 public interface Validator
29 {
30
31     /**
32      * Is this number valid? If so, return a null
33      * IOException. Otherwise, return an IOException whose message
34      * explains why the number is not valid.
35      *
36      * @param number the Number holding the value. Guaranteed non-null
37      *
38      * @return a null IOException if the value is ok, else a real
39      * IOException
40      */

41
42     public IOException JavaDoc validate(final Number JavaDoc number);
43 } // end public interface Validator
44
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