/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.empire.struts2.actionsupport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.empire.db.DBCommandExpr;
import org.apache.empire.db.DBReader;
/**
* ReaderListActionSupport
* <p>
* This class provides functions for handling list output from a database query through a DBReader object.
* </p>
* @author Rainer
*/
public class ReaderListActionSupport extends ListActionSupport
{
@SuppressWarnings("hiding")
protected static Logger log = LoggerFactory.getLogger(RecordActionSupport.class);
protected DBReader reader;
public ReaderListActionSupport(ActionBase action, String propertyName)
{
super(action, propertyName);
}
public DBReader getReader()
{
return reader;
}
public void initReader(DBCommandExpr cmd, boolean scrollable)
{
// Make sure previous reader is closed
if (reader!=null)
reader.close();
// Create a new reader
reader = new DBReader();
reader.open(cmd, scrollable, action.getConnection() );
// Move to desired Position
int first = this.getFirstItemIndex();
if (first>0 && !reader.skipRows(first))
{ // Page is not valid. Try again from beginning
reader.close();
setFirstItem(0);
initReader(cmd);
}
}
public void initReader(DBCommandExpr cmd)
{
initReader(cmd, false);
}
}