| 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 | } |