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Cayenne Object Persistence Framework
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* to you under the Apache License, Version 2.0 (the
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*
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package org.apache.cayenne.dba;
/**
* Represents data structure to maintain a range of cached
* primary keys.
*
* @author Andrei Adamchik
*/
public final class PkRange {
private int curValue;
private int maxValue;
public PkRange(int curValue, int maxValue) {
reset(curValue, maxValue);
}
public void reset(int curValue, int maxValue) {
this.curValue = curValue;
this.maxValue = maxValue;
}
public boolean isExhausted() {
return curValue > maxValue;
}
public Integer getNextPrimaryKey() {
// do bound checking
if (isExhausted()) {
throw new RuntimeException("PkRange is exhausted and can not be used anymore.");
}
return new Integer(curValue++);
}
}
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