fileloader.java

eq跨平台查询工具源码 eq跨平台查询工具源码

/*
 * FileLoader.java
 *
 * Copyright (C) 2002, 2003, 2004, 2005, 2006 Takis Diakoumis
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */


package org.executequery.util;

import java.io.File;
import java.io.IOException;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import org.executequery.GUIUtilities;
import org.executequery.gui.editor.QueryEditor;
import org.executequery.gui.ScratchPadPanel;
import org.executequery.gui.erd.ErdSaveFileFormat;
import org.executequery.gui.erd.ErdViewerPanel;
import org.executequery.components.OpenFileDialog;
import org.underworldlabs.swing.util.SwingWorker;
import org.underworldlabs.util.FileUtils;

/* ----------------------------------------------------------
 * CVS NOTE: Changes to the CVS repository prior to the 
 *           release of version 3.0.0beta1 has meant a 
 *           resetting of CVS revision numbers.
 * ----------------------------------------------------------
 */

/**
 *
 * @author   Takis Diakoumis
 * @version  $Revision: 1.5 $
 * @date     $Date: 2006/05/20 02:59:49 $
 */
public class FileLoader {
    
    /** Creates a new instance of FileLoader */
    public FileLoader() {}

    public void openFile(String file, int openWith) {
        openFile(new File(file), openWith);
    }

    public void openFile(final File file, final int openWith) {
        SwingWorker worker = new SwingWorker() {
            public Object construct() {
                GUIUtilities.getStatusBar().setSecondLabelText(
                        "Loading file: " + file.getName());
                GUIUtilities.showWaitCursor();
                load(file, openWith);
                return "done";
            }
            public void finished() {
                GUIUtilities.getStatusBar().
                        setSecondLabelText("I/O process complete");
                GUIUtilities.showNormalCursor();
            }
        };
        worker.start();
    }
    
    private void load(File file, int openWith) {
        
        if (file == null || !file.exists()) {
            GUIUtilities.displayErrorMessage("Invalid file name");
            return;
        }
        
        try {
            String fileName = file.getName();

            if (openWith == -1) {
                if (fileName.endsWith(".sql")) {
                    openWith = OpenFileDialog.NEW_EDITOR;
                }
                else {
                    openWith = OpenFileDialog.SCRATCH_PAD;
                }
            }

            if (fileName.endsWith(".eqd")) {

                Object object = FileUtils.readObject(file);
                if (!(object instanceof ErdSaveFileFormat)) {
                    GUIUtilities.displayErrorMessage("Invalid file format");
                    return;
                }

                ErdSaveFileFormat erd = (ErdSaveFileFormat)object;                
                JPanel panel = GUIUtilities.getOpenFrame(ErdViewerPanel.TITLE);

                if (panel != null && panel instanceof ErdViewerPanel) {
                    ErdViewerPanel erdPanel = (ErdViewerPanel)panel;
                    erdPanel.setSavedErd(erd, file.getAbsolutePath());
                }                 
                else {
                    ErdViewerPanel erdPanel = new ErdViewerPanel(erd, file.getAbsolutePath());
                    GUIUtilities.addCentralPane(ErdViewerPanel.TITLE,
                                                ErdViewerPanel.FRAME_ICON, 
                                                erdPanel,
                                                null,
                                                true);
                    erdPanel.setSavedErd(erd, file.getAbsolutePath());
                }
                GUIUtilities.addNewRecentFileToMenu(file);
                return;
            }
            
            String contents = FileUtils.loadFile(file);

            if (openWith == OpenFileDialog.NEW_EDITOR) {
                openNewEditor(file, contents);
            }            
            else if (openWith == OpenFileDialog.OPEN_EDITOR) {
                JPanel panel = GUIUtilities.getSelectedCentralPane();

                if (panel != null && panel instanceof QueryEditor) {
                    QueryEditor editor = ((QueryEditor)panel);
                    //editor.setEditorText(contents, true);
                    editor.loadText(contents);
                    editor.setAbsoluteFile(file.getAbsolutePath());
                    GUIUtilities.setTabTitleForComponent(
                                    panel, editor.getDisplayName());
                } 
                else {
                    openNewEditor(file, contents);
                }

            } 
            else if (openWith == OpenFileDialog.SCRATCH_PAD) {
                JPanel panel = GUIUtilities.getSelectedCentralPane();

                if (panel != null && panel instanceof ScratchPadPanel) {
                    ((ScratchPadPanel)panel).setEditorText(contents);
                }
                else {
                    openNewScratchPad(file, contents);
                }

            }
            GUIUtilities.addNewRecentFileToMenu(file);

        }
        catch(IOException ioExc) {
            ioExc.printStackTrace();
            GUIUtilities.displayErrorMessage(
                    "I/O error opening selected file.\n" + ioExc.getMessage());
        } 

    }
    
    private void openNewScratchPad(File file, String contents) {
        GUIUtilities.addCentralPane(ScratchPadPanel.TITLE,
                                    ScratchPadPanel.FRAME_ICON, 
                                    new ScratchPadPanel(contents),
                                    null,
                                    true);
    }

    private void openNewEditor(File file, String contents) {
        QueryEditor editor = new QueryEditor(contents, file.getAbsolutePath());
        GUIUtilities.addCentralPane(QueryEditor.TITLE,
                                    QueryEditor.FRAME_ICON, 
                                    editor,
                                    null,
                                    true);
    }

}