?? keygenerator.java
字號:
package com.javapatterns.keygen.ver4;
import java.util.HashMap;
public class KeyGenerator
{
/**
* @label creates
*/
private static KeyGenerator keygen =
new KeyGenerator();
private static final int POOL_SIZE = 20;
private HashMap keyList = new HashMap(10);
/** @link dependency */
/*# KeyInfo lnkKeyInfo; */
private KeyGenerator()
{
}
public static KeyGenerator getInstance()
{
return keygen;
}
public int getNextKey(String keyName)
{
KeyInfo keyinfo ;
if ( keyList.containsKey(keyName) )
{
keyinfo = (KeyInfo) keyList.get(keyName);
System.out.println("key found");
}
else
{
keyinfo = new KeyInfo(POOL_SIZE, keyName);
keyList.put(keyName, keyinfo);
System.out.println("new key created");
}
return keyinfo.getNextKey();
}
}
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