package demo29;
import org.openswing.swing.table.client.GridController;
import java.util.*;
import org.openswing.swing.message.receive.java.*;
import java.sql.*;
import org.openswing.swing.message.send.java.FilterWhereClause;
import org.openswing.swing.table.java.GridDataLocator;
import org.openswing.swing.mdi.client.MDIFrame;
import java.awt.Color;
import org.openswing.swing.server.QueryUtil;
import org.openswing.swing.message.send.java.GridParams;
/**
* <p>Title: OpenSwing Framework</p>
* <p>Description: Grid controller for employees.</p>
* <p>Copyright: Copyright (C) 2006 Mauro Carniel</p>
* <p> </p>
* @author Mauro Carniel
* @version 1.0
*/
public class EmpGridController extends GridController implements GridDataLocator {
private EmpDetailFrame frame = null;
private Connection conn = null;
public EmpGridController(Connection conn,EmpDetailFrame frame) {
this.conn = conn;
this.frame = frame;
}
/**
* Callback method invoked to load data on the grid.
* @param action fetching versus: PREVIOUS_BLOCK_ACTION, NEXT_BLOCK_ACTION or LAST_BLOCK_ACTION
* @param startPos start position of data fetching in result set
* @param filteredColumns filtered columns
* @param currentSortedColumns sorted columns
* @param currentSortedVersusColumns ordering versus of sorted columns
* @param valueObjectType v.o. type
* @param otherGridParams other grid parameters
* @return response from the server: an object of type VOListResponse if data loading was successfully completed, or an ErrorResponse onject if some error occours
*/
public Response loadData(
int action,
int startIndex,
Map filteredColumns,
ArrayList currentSortedColumns,
ArrayList currentSortedVersusColumns,
Class valueObjectType,
Map otherGridParams) {
try {
String sql = "select EMP.EMP_CODE,EMP.FIRST_NAME,EMP.LAST_NAME,EMP.DEPT_CODE,DEPT.DESCRIPTION from EMP,DEPT where EMP.DEPT_CODE=DEPT.DEPT_CODE";
// mapping between attributes and database fields...
Map attribute2dbField = new HashMap();
attribute2dbField.put("empCode","EMP.EMP_CODE");
attribute2dbField.put("firstName","EMP.FIRST_NAME");
attribute2dbField.put("lastName","EMP.LAST_NAME");
attribute2dbField.put("deptCode","EMP.DEPT_CODE");
attribute2dbField.put("deptDescription","DEPT.DESCRIPTION");
return QueryUtil.getQuery(
conn,
sql,
new ArrayList(), // list of values linked to "?" parameters in sql
attribute2dbField,
GridEmpVO.class, // v.o. to dinamically create for each row...
"Y",
"N",
new GridParams(
action,
startIndex,
filteredColumns,
currentSortedColumns,
currentSortedVersusColumns,
new HashMap() // other params...
),
50, // pagination size...
true // log query...
);
}
catch (Exception ex) {
ex.printStackTrace();
return new ErrorResponse(ex.getMessage());
}
/*
// an alternative way: you can define your own business logic to retrieve data and adding filtering/sorting conditions at hand...
PreparedStatement stmt = null;
try {
String sql = "select EMP.EMP_CODE,EMP.FIRST_NAME, EMP.LAST_NAME,EMP.DEPT_CODE,DEPT.DESCRIPTION from EMP,DEPT where EMP.DEPT_CODE=DEPT.DEPT_CODE";
Vector vals = new Vector();
if (filteredColumns.size()>0) {
FilterWhereClause[] filter = (FilterWhereClause[])filteredColumns.get("deptCode");
sql += " and EMP.DEPT_CODE "+ filter[0].getOperator()+"?";
vals.add(filter[0].getValue());
if (filter[1]!=null) {
sql += " and EMP.DEPT_CODE "+ filter[1].getOperator()+"?";
vals.add(filter[1].getValue());
}
}
if (currentSortedColumns.size()>0) {
sql += " ORDER BY EMP.FIRST_NAME "+currentSortedVersusColumns.get(0);
}
stmt = conn.prepareStatement(sql);
for(int i=0;i<vals.size();i++)
stmt.setObject(i+1,vals.get(i));
ResultSet rset = stmt.executeQuery();
ArrayList list = new ArrayList();
GridEmpVO vo = null;
while (rset.next()) {
vo = new GridEmpVO();
vo.setEmpCode(rset.getString(1));
vo.setFirstName(rset.getString(2));
vo.setLastName(rset.getString(3));
vo.setDeptCode(rset.getString(4));
vo.setDeptDescription(rset.getString(5));
list.add(vo);
}
return new VOListResponse(list,false,list.size());
}
catch (SQLException ex) {
ex.printStackTrace();
return new ErrorResponse(ex.getMessage());
}
finally {
try {
stmt.close();
}
catch (SQLException ex1) {
}
}
*/
}
/**
* Method invoked when the user has clicked on delete button and the grid is in READONLY mode.
* @param persistentObjects value objects to delete (related to the currently selected rows)
* @return an ErrorResponse value object in case of errors, VOResponse if the operation is successfully completed
*/
public Response deleteRecords(ArrayList persistentObjects) throws Exception {
PreparedStatement stmt = null;
try {
stmt = conn.prepareStatement("delete from EMP where EMP_CODE=?");
GridEmpVO vo = null;
for(int i=0;i<persistentObjects.size();i++) {
vo = (GridEmpVO)persistentObjects.get(i);
stmt.setString(1,vo.getEmpCode());
stmt.execute();
}
return new VOResponse(new Boolean(true));
}
catch (SQLException ex) {
ex.printStackTrace();
return new ErrorResponse(ex.getMessage());
}
finally {
try {
stmt.close();
conn.commit();
}
catch (SQLException ex1) {
}
}
}
/**
* Method used to define the background color for each cell of the grid.
* @param rowNumber selected row index
* @param attributedName attribute name related to the column currently selected
* @param value object contained in the selected cell
* @return background color of the selected cell
*/
public Color getBackgroundColor(int row,String attributedName,Object value) {
if (attributedName.equals("deptCode")) {
if (value.equals("SF"))
return new Color(255,100,100);
else if (value.equals("S"))
return new Color(210,100,100);
else if (value.equals("P"))
return new Color(170,100,100);
}
return super.getBackgroundColor(row,attributedName,value);
}
/**
* Callback method invoked when the data loading is completed.
* @param error <code>true</code> if data loading has terminated with errors, <code>false</code> otherwise
*/
public void loadDataCompleted(boolean error) {
frame.getMainPanel().reload();
}
}