1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * https://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.validator.routines.checkdigit;
19
20 /**
21 * Abstracts {@link CheckDigit} for implementations.
22 */
23 abstract class AbstractCheckDigit implements CheckDigit {
24
25 /**
26 * Result from {@code Character.getNumericValue('Z')}.
27 */
28 static final int MAX_ALPHANUMERIC_VALUE = 35;
29
30 boolean isAsciiAlpha(final char ch) {
31 return ch >= 'A' && ch <= 'Z' || ch >= 'a' && ch <= 'z'; // CHECKSTYLE IGNORE MagicNumber
32 }
33
34 boolean isAsciiAlphaNum(final char ch) {
35 return isAsciiDigit(ch) || isAsciiAlpha(ch);
36 }
37
38 boolean isAsciiDigit(final char ch) {
39 return ch >= '0' && ch <= '9'; // CHECKSTYLE IGNORE MagicNumber
40 }
41
42 boolean isAsciiDigit(final int ch) {
43 return ch >= 0 && ch <= 9; // CHECKSTYLE IGNORE MagicNumber
44 }
45 }