001/* 002 * Copyright 2006-2007 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.batch.item.file.transform; 018 019import org.springframework.util.Assert; 020 021/** 022 * A class to represent ranges. A Range can have minimum/maximum values from 023 * interval <1,Integer.MAX_VALUE-1> A Range can be unbounded at maximum 024 * side. This can be specified by passing {@link Range#UPPER_BORDER_NOT_DEFINED}} as max 025 * value or using constructor {@link #Range(int)}. 026 * 027 * @author peter.zozom 028 */ 029public class Range { 030 031 public final static int UPPER_BORDER_NOT_DEFINED = Integer.MAX_VALUE; 032 033 final private int min; 034 final private int max; 035 036 public Range(int min) { 037 this(min,UPPER_BORDER_NOT_DEFINED); 038 } 039 040 public Range(int min, int max) { 041 checkMinMaxValues(min, max); 042 this.min = min; 043 this.max = max; 044 } 045 046 public int getMax() { 047 return max; 048 } 049 050 public int getMin() { 051 return min; 052 } 053 054 public boolean hasMaxValue() { 055 return max != UPPER_BORDER_NOT_DEFINED; 056 } 057 058 @Override 059 public String toString() { 060 return hasMaxValue() ? min + "-" + max : String.valueOf(min); 061 } 062 063 private void checkMinMaxValues(int min, int max) { 064 Assert.isTrue(min>0, "Min value must be higher than zero"); 065 Assert.isTrue(min<=max, "Min value should be lower or equal to max value"); 066 } 067}