package com.alimama.mdrill.buffer;
import java.util.zip.CRC32;
import org.apache.lucene.index.IndexReader;
public class LuceneUtils {
public static String crcKey(IndexReader r)
{
String key= r.getStringCacheKey();
CRC32 crc32 = new CRC32();
crc32.update(new String(key).getBytes());
long crcvalue = crc32.getValue();
StringBuffer buff=new StringBuffer();
buff.append(abs(key.hashCode()));
buff.append("_");
buff.append(abs(crcvalue));
buff.append("_");
buff.append(key.length());
return buff.toString();
}
public static long abs(long num)
{
if(num<0)
{
return num*-1;
}
return num;
}
}