package demo43;
import org.openswing.swing.table.client.GridController;
import java.util.*;
import org.openswing.swing.message.receive.java.*;
import java.io.*;
import org.openswing.swing.util.client.ClientUtils;
import org.openswing.swing.util.java.Consts;
import org.openswing.swing.table.java.GridDataLocator;
/**
* <p>Title: OpenSwing Framework</p>
* <p>Description: Grid controller of file frame.
* It read/write an image gif/jpg file from file system.</p>
* @author Mauro Carniel
* @version 1.0
*/
public class FileGridFrameController extends GridController implements GridDataLocator {
private FileGridFrame frame = null;
public FileGridFrameController() {
frame = new FileGridFrame(this);
ClientUtils.centerFrame(frame);
frame.setVisible(true);
}
/**
* Method invoked when the user has clicked on save button and the grid is in INSERT mode.
* @param rowNumbers row indexes related to the new rows to save
* @param newValueObjects list of new value objects to save
* @return an ErrorResponse value object in case of errors, VOListResponse if the operation is successfully completed
*/
public Response insertRecords(int[] rowNumbers, ArrayList newValueObjects) throws Exception {
try {
FileVO vo = (FileVO)newValueObjects.get(0);
FileOutputStream out = new FileOutputStream(System.getProperty("user.home")+vo.getFileName());
byte[] bb = vo.getFile();
out.write(bb);
out.close();
return new VOListResponse(newValueObjects,false,newValueObjects.size());
}
catch (Exception ex) {
return new ErrorResponse("Error on creating the demo value object:\n"+ex.toString());
}
}
/**
* Method invoked when the user has clicked on save button and the grid is in EDIT mode.
* @param rowNumbers row indexes related to the changed rows
* @param oldPersistentObjects old value objects, previous the changes
* @param persistentObjects value objects relatied to the changed rows
* @return an ErrorResponse value object in case of errors, VOListResponse if the operation is successfully completed
*/
public Response updateRecords(int[] rowNumbers,ArrayList oldPersistentObjects,ArrayList persistentObjects) throws Exception {
try {
FileVO vo = null;
FileVO oldVO = null;
FileOutputStream out = null;
byte[] bb = null;
for(int i=0;i<persistentObjects.size();i++) {
vo = (FileVO)persistentObjects.get(i);
oldVO = (FileVO)oldPersistentObjects.get(i);
if (oldVO.getFileName()!=null && oldVO.getFileName().equals(vo.getFileName()))
new File(System.getProperty("user.home")+oldVO.getFileName()).delete();
out = new FileOutputStream(System.getProperty("user.home")+vo.getFileName());
bb = vo.getFile();
out.write(bb);
out.close();
if (oldVO.getFileName()!=null)
new File(oldVO.getFileName()).delete();
}
return new VOListResponse(persistentObjects,false,persistentObjects.size());
}
catch (Exception ex) {
return new ErrorResponse("Error on updaing the demo value objects list:\n"+ex.toString());
}
}
/**
* 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 {
try {
FileVO vo = null;
for(int i=0;i<persistentObjects.size();i++) {
vo = (FileVO)persistentObjects.get(i);
new File(System.getProperty("user.home")+vo.getFileName()).delete();
}
return new VOResponse(Boolean.TRUE);
}
catch (Exception ex) {
return new ErrorResponse("Error on deleting the demo value objects list:\n"+ex.toString());
}
}
/**
* Method invoked by the grid to load a block or rows.
* @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 {
ArrayList list = new ArrayList();
FileVO vo = null;
File f = new File(System.getProperty("user.home"));
File[] ff = f.listFiles(new FilenameFilter() {
public boolean accept(File dir, String name) {
return new File(dir.getAbsoluteFile()+"/"+name).isFile();
}
});
BufferedInputStream in = null;
for(int i=0;i<ff.length;i++) {
try {
vo = new FileVO();
in = new BufferedInputStream(new FileInputStream(ff[i]));
byte[] bb = new byte[ (int) ff[i].length()];
in.read(bb);
in.close();
vo.setFile(bb);
vo.setFileName(ff[i].getName());
vo.setUploadDate(new Date(ff[i].lastModified()));
list.add(vo);
}
catch (Exception ex1) {
}
}
return new VOListResponse(list,false,list.size());
}
catch (Exception ex) {
return new ErrorResponse("Error on creating the demo value objecst list:\n"+ex.toString());
}
}
/**
* Callback method invoked each time a cell is edited: this method define if the new value is valid.
* This method is invoked ONLY if:
* - the edited value is not equals to the old value OR it has exmplicitely called setCellAt or setValueAt
* - the cell is editable
* Default behaviour: cell value is valid.
* @param rowNumber selected row index
* @param attributeName attribute name related to the column currently selected
* @param oldValue old cell value (before cell editing)
* @param newValue new cell value (just edited)
* @return <code>true</code> if cell value is valid, <code>false</code> otherwise
*/
public boolean validateCell(int rowNumber,String attributeName,Object oldValue,Object newValue) {
if (attributeName.equals("file") && newValue!=null)
frame.getGrid().getVOListTableModel().setField(rowNumber,"uploadDate",new Date());
return true;
}
}