org.knowm.yank.handlers.LongColumnListHandler Maven / Gradle / Ivy
package org.knowm.yank.handlers;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.apache.commons.dbutils.handlers.ColumnListHandler;
public class LongColumnListHandler extends ColumnListHandler {
/** The column number to retrieve. */
private final int columnIndex;
/** The column name to retrieve. Either columnName or columnIndex will be used but never both. */
private final String columnName;
/**
* Creates a new instance of ColumnListHandler. The first column of each row will be returned from
* handle().
*/
public LongColumnListHandler() {
this(1, null);
}
/**
* Creates a new instance of ColumnListHandler.
*
* @param columnIndex The index of the column to retrieve from the ResultSet.
*/
public LongColumnListHandler(int columnIndex) {
this(columnIndex, null);
}
/**
* Creates a new instance of ColumnListHandler.
*
* @param columnName The name of the column to retrieve from the ResultSet.
*/
public LongColumnListHandler(String columnName) {
this(1, columnName);
}
/**
* Private Helper
*
* @param columnIndex The index of the column to retrieve from the ResultSet.
* @param columnName The name of the column to retrieve from the ResultSet.
*/
private LongColumnListHandler(int columnIndex, String columnName) {
super();
this.columnIndex = columnIndex;
this.columnName = columnName;
}
/**
* Returns one ResultSet column value as Object.
*
* @param rs ResultSet to process.
* @return Object, never null.
* @throws SQLException if a database access error occurs
* @throws ClassCastException if the class datatype does not match the column type
* @see org.apache.commons.dbutils.handlers.AbstractListHandler#handle(ResultSet)
*/
@Override
protected Long handleRow(ResultSet rs) throws SQLException {
if (this.columnName == null) {
return rs.getLong(this.columnIndex);
}
return rs.getLong(this.columnName);
}
}