package org.apache.solr.core;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.lucene.index.IndexFileNameFilter;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;
public class RefCntRamDirectory extends RAMDirectory {
private final AtomicInteger refCount = new AtomicInteger();
public RefCntRamDirectory() {
super();
refCount.set(1);
}
public RefCntRamDirectory(Directory dir) throws IOException {
this();
for (String file : dir.listAll()) {
dir.copy(this, file, file);
}
}
public void incRef() {
ensureOpen();
refCount.incrementAndGet();
}
public void decRef() {
ensureOpen();
if (refCount.getAndDecrement() == 1) {
super.close();
}
}
public final synchronized void close() {
decRef();
}
public boolean isOpen() {
return isOpen;
}
}