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package org.postgresql;
import java.util.Hashtable;
/**
* Just a factory class for creating and reusing
* ObjectPool arrays of different sizes.
*/
public class ObjectPoolFactory {
private static Hashtable instances = new Hashtable();
ObjectPool pool = new ObjectPool();
int maxsize;
public static ObjectPoolFactory getInstance(int size){
Integer s = new Integer(size);
ObjectPoolFactory poolFactory = (ObjectPoolFactory) instances.get(s);
if(poolFactory == null){
synchronized(instances) {
poolFactory = (ObjectPoolFactory) instances.get(s);
if(poolFactory == null){
poolFactory = new ObjectPoolFactory(size);
instances.put(s, poolFactory);
}
}
}
return poolFactory;
}
private ObjectPoolFactory(int maxsize){
this.maxsize = maxsize;
}
public ObjectPool[] getObjectPoolArr(){
ObjectPool p[] = null;
synchronized(pool){
if(pool.size() > 0)
p = (ObjectPool []) pool.remove();
}
if(p == null) {
p = new ObjectPool[maxsize];
for(int i = 0; i < maxsize; i++){
p[i] = new ObjectPool();
}
}
return p;
}
public void releaseObjectPoolArr(ObjectPool p[]){
synchronized(pool){
pool.add(p);
for(int i = 0; i < maxsize; i++){
p[i].clear();
}
}
}
}
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