1 /*
2 * Copyright 2006-2007 the original author or authors.
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.springframework.batch.item.file.transform;
18
19 import org.springframework.util.Assert;
20
21 /**
22 * A class to represent ranges. A Range can have minimum/maximum values from
23 * interval <1,Integer.MAX_VALUE-1> A Range can be unbounded at maximum
24 * side. This can be specified by passing {@link Range#UPPER_BORDER_NOT_DEFINED}} as max
25 * value or using constructor {@link #Range(int)}.
26 *
27 * @author peter.zozom
28 */
29 public class Range {
30
31 public final static int UPPER_BORDER_NOT_DEFINED = Integer.MAX_VALUE;
32
33 final private int min;
34 final private int max;
35
36 public Range(int min) {
37 this(min,UPPER_BORDER_NOT_DEFINED);
38 }
39
40 public Range(int min, int max) {
41 checkMinMaxValues(min, max);
42 this.min = min;
43 this.max = max;
44 }
45
46 public int getMax() {
47 return max;
48 }
49
50 public int getMin() {
51 return min;
52 }
53
54 public boolean hasMaxValue() {
55 return max != UPPER_BORDER_NOT_DEFINED;
56 }
57
58 public String toString() {
59 return hasMaxValue() ? min + "-" + max : String.valueOf(min);
60 }
61
62 private void checkMinMaxValues(int min, int max) {
63 Assert.isTrue(min>0, "Min value must be higher than zero");
64 Assert.isTrue(min<=max, "Min value should be lower or equal to max value");
65 }
66 }