spring-batch Range 源码
spring-batch Range 代码
文件路径：/spring-batch-infrastructure/src/main/java/org/springframework/batch/item/file/transform/Range.java
/*
* Copyright 2006-2007 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.batch.item.file.transform;
import org.springframework.util.Assert;
/**
* A class to represent ranges. A Range can have minimum/maximum values from interval
* <1,Integer.MAX_VALUE-1> A Range can be unbounded at maximum side. This can be
* specified by passing {@link Range#UPPER_BORDER_NOT_DEFINED}} as max value or using
* constructor {@link #Range(int)}.
*
* @author peter.zozom
*/
public class Range {
public final static int UPPER_BORDER_NOT_DEFINED = Integer.MAX_VALUE;
final private int min;
final private int max;
public Range(int min) {
this(min, UPPER_BORDER_NOT_DEFINED);
}
public Range(int min, int max) {
checkMinMaxValues(min, max);
this.min = min;
this.max = max;
}
public int getMax() {
return max;
}
public int getMin() {
return min;
}
public boolean hasMaxValue() {
return max != UPPER_BORDER_NOT_DEFINED;
}
@Override
public String toString() {
return hasMaxValue() ? min + "-" + max : String.valueOf(min);
}
private void checkMinMaxValues(int min, int max) {
Assert.isTrue(min > 0, "Min value must be higher than zero");
Assert.isTrue(min <= max, "Min value should be lower or equal to max value");
}
}
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