// $Id: ColumnNameCache.java 5811 2005-02-20 23:02:37Z oneovthafew $
package org.hibernate.jdbc;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
/**
* Implementation of ColumnNameCache.
*
* @author Steve Ebersole
*/
public class ColumnNameCache {
private final Map columnNameToIndexCache;
public ColumnNameCache(int columnCount) {
// should *not* need to grow beyond the size of the total number of columns in the rs
this.columnNameToIndexCache = new HashMap( columnCount );
}
public int getIndexForColumnName(String columnName, ResultSetWrapper rs)throws SQLException {
Integer cached = ( Integer ) columnNameToIndexCache.get( columnName );
if ( cached != null ) {
return cached.intValue();
}
else {
int index = rs.getTarget().findColumn( columnName );
columnNameToIndexCache.put( columnName, new Integer(index) );
return index;
}
}
}
|