/*
 * Copyright (c) 2000, 2017 Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2021 Contributors to the Eclipse Foundation
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

/*
 * @(#)ObjStoreDialog.java	1.31 06/27/07
 */

package com.sun.messaging.jmq.admin.apps.console;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Frame;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.io.File;
import java.net.URI;
import java.util.Enumeration;
import java.util.Properties;

import javax.naming.Context;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.JPanel;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JSeparator;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.ListSelectionModel;
import javax.swing.ScrollPaneConstants;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.event.TableModelEvent;
import javax.swing.table.AbstractTableModel;

import com.sun.messaging.jmq.admin.util.Globals;
import com.sun.messaging.jmq.admin.resources.AdminConsoleResources;
import com.sun.messaging.jmq.admin.objstore.ObjStoreManager;
import com.sun.messaging.jmq.admin.apps.console.util.LabelledComponent;
import com.sun.messaging.jmq.admin.apps.console.util.LabelValuePanel;

/**
 * This dialog is used for object store attributes. It can be used to Add an object store to the list or to modify
 * (update) an existing object store.
 *
 */
public class ObjStoreDialog extends AdminDialog implements ListSelectionListener {

    /**
     * 
     */
    private static final long serialVersionUID = 1800350885238627037L;
    protected JTextField osText;
    protected LabelValuePanel lvp;
    protected ObjStoreManager osMgr = null;
    protected Properties jndiProps = new Properties();
    protected JComboBox comboBox;
    protected JCheckBox checkBox;
    protected PropsTableModel model;
    protected JButton addButton, delButton, chgButton;
    protected boolean dirty = false;
    protected JTextField valueText;
    protected JTable table;
    protected JTextArea ta;

    private boolean editable;
    private static AdminConsoleResources acr = Globals.getAdminConsoleResources();
    private static String close[] = { acr.getString(acr.I_DIALOG_CLOSE) };

    /**
     * Creates a non-modal dialog using the specified frame as parent and string as title. By default, will contain the
     * following buttons:
     * <UL>
     * <LI>OK
     * <LI>CANCEL
     * <LI>CLOSE
     * <LI>HELP
     * </UL>
     *
     * @param parent the Frame from which the dialog is displayed
     * @param title the String to display in the dialog's title bar
     */
    public ObjStoreDialog(Frame parent, String title, ObjStoreListCObj oslCObj) {
        super(parent, title, (OK | CANCEL | HELP));
        if (oslCObj != null) {
            osMgr = oslCObj.getObjStoreManager();
        }
    }

    public ObjStoreDialog(Frame parent, String title, int whichButtons, ObjStoreListCObj oslCObj) {
        super(parent, title, whichButtons);
        if (oslCObj != null) {
            osMgr = oslCObj.getObjStoreManager();
        }
    }

    @Override
    public JPanel createWorkPanel() {
        String[] jndiPropNames = { Context.INITIAL_CONTEXT_FACTORY, Context.OBJECT_FACTORIES, Context.STATE_FACTORIES, Context.URL_PKG_PREFIXES,
                Context.PROVIDER_URL, Context.DNS_URL, Context.AUTHORITATIVE, Context.BATCHSIZE, Context.REFERRAL, Context.SECURITY_PROTOCOL,
                Context.SECURITY_AUTHENTICATION, Context.SECURITY_PRINCIPAL, Context.SECURITY_CREDENTIALS, Context.LANGUAGE, Context.APPLET };

        boolean propsDlg = false;
        if (getTitle().equals(acr.getString(acr.I_OBJSTORE_PROPS))) {
            propsDlg = true;
        }

        JPanel workPanel = new JPanel();
        workPanel.setLayout(new BorderLayout());

        JPanel panel1 = new JPanel();
        GridBagLayout gridbag = new GridBagLayout();
        panel1.setLayout(gridbag);
        GridBagConstraints c = new GridBagConstraints();

        JPanel osPanel = new JPanel();
        GridBagLayout gb = new GridBagLayout();
        osPanel.setLayout(gb);
        GridBagConstraints c1 = new GridBagConstraints();

        JLabel storeLabel = new JLabel(acr.getString(acr.I_OBJSTORE_NAME) + ":");
        c1.gridx = 0;
        c1.gridy = 0;
        c1.anchor = GridBagConstraints.NORTHEAST;
        gridbag.setConstraints(storeLabel, c1);
        osPanel.add(storeLabel);

        osText = new JTextField(25);
        DocumentListener docListener = new ObjStoreDocumentListener();
        osText.getDocument().addDocumentListener(docListener);
        c1.gridx = 1;
        c1.gridy = 0;
        c1.anchor = GridBagConstraints.WEST;
        c1.insets = new Insets(0, 5, 0, 0);
        gb.setConstraints(osText, c1);
        osPanel.add(osText);

        c.gridx = 0;
        c.gridy = 0;
        c1.anchor = GridBagConstraints.WEST;
        panel1.add(osPanel);

        if (propsDlg) {
            checkBox = new JCheckBox(acr.getString(acr.I_CONNECT_AFTER_UPDATES), true);
        } else {
            checkBox = new JCheckBox(acr.getString(acr.I_CONNECT_UPON_ADDING), true);
        }
        checkBox.addActionListener(this);
        c.gridx = 0;
        c.gridy = 1;
        c.gridwidth = 3;
        c.insets = new Insets(0, 0, 0, 0); // reset
        c.anchor = GridBagConstraints.WEST;
        gridbag.setConstraints(checkBox, c);
        /*
         * panel1.add(checkBox);
         */

        JSeparator separator = new JSeparator();
        c.gridx = 0;
        c.gridy = 2;
        c.anchor = GridBagConstraints.CENTER;
        c.fill = GridBagConstraints.HORIZONTAL;
        c.insets = new Insets(5, 0, 5, 0);
        gridbag.setConstraints(separator, c);
        panel1.add(separator);

        JLabel jndiLabel = new JLabel(acr.getString(acr.I_OBJSTORE_JNDI_PROPS));
        c.gridx = 0;
        c.gridy = 3;
        c.gridwidth = 3;
        c.anchor = GridBagConstraints.WEST; // reset
        c.insets = new Insets(0, 0, 0, 0); // reset
        c.fill = GridBagConstraints.NONE; // reset c.anchor = GridBagConstraints.WEST;
        gridbag.setConstraints(jndiLabel, c);
        panel1.add(jndiLabel);

        LabelledComponent items[] = new LabelledComponent[3];
        comboBox = new JComboBox(jndiPropNames);
        comboBox.addActionListener(this);
        items[0] = new LabelledComponent(acr.getString(acr.I_NAME) + ":", comboBox);
        valueText = new JTextField(40);
        valueText.getDocument().addDocumentListener(docListener);
        items[1] = new LabelledComponent(acr.getString(acr.I_VALUE) + ":", valueText);

        model = new PropsTableModel();
        table = new JTable(model);
        table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        ListSelectionModel lsm = table.getSelectionModel();
        lsm.addListSelectionListener(this);
        JScrollPane scrollPane = new JScrollPane(table);
        scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);

        items[2] = new LabelledComponent(" ", scrollPane);

        lvp = new LabelValuePanel(items, 5, 5);
        c.gridx = 0;
        c.gridy = 4;
        c.gridwidth = 2;
        c.anchor = GridBagConstraints.CENTER;
        gridbag.setConstraints(lvp, c);
        panel1.add(lvp);

        //
        // Make width of list the same as width of text field and
        // 8 rows in height.
        //
        int width = valueText.getPreferredSize().width;
        // Dimension dim = scrollPane.getPreferredSize();
        // scrollPane.setPreferredSize(new Dimension(width, dim.height));
        table.getRowHeight();
        table.setPreferredScrollableViewportSize(new Dimension(width, 8 * table.getRowHeight()));

        JPanel buttonPanel = new JPanel();
        addButton = new JButton(acr.getString(acr.I_DIALOG_ADD));
        addButton.addActionListener(this);
        delButton = new JButton(acr.getString(acr.I_DIALOG_DELETE));
        delButton.addActionListener(this);
        delButton.setEnabled(false);
        chgButton = new JButton(acr.getString(acr.I_DIALOG_CHANGE));
        chgButton.addActionListener(this);
        chgButton.setEnabled(false);
        buttonPanel.setLayout(new GridLayout(3, 1, 5, 5));
        buttonPanel.add(addButton);
        buttonPanel.add(delButton);
        buttonPanel.add(chgButton);
        c.gridx = 2;
        c.gridy = 4;
        c.gridwidth = 1;
        c.anchor = GridBagConstraints.NORTHWEST;
        c.insets = new Insets(items[0].getPreferredSize().height + items[1].getPreferredSize().height + 20, 0, 0, 0);
        gridbag.setConstraints(buttonPanel, c);
        panel1.add(buttonPanel);

        String s = acr.getString(acr.W_SAVE_AS_CLEAR_TEXT);
        ta = new JTextArea(s);
        ta.setLineWrap(true);
        ta.setWrapStyleWord(true);
        Color bgColor = panel1.getBackground();
        ta.setBackground(bgColor);
        Color fgColor = jndiLabel.getForeground();
        ta.setForeground(fgColor);
        ta.setFont(jndiLabel.getFont());

        // Find longer length to set length of text area:
        // Either 1) ObjectStoreLabel: ___ OR
        // 2) Width of LabelValuePanel
        int width1 = storeLabel.getPreferredSize().width + 5 + osText.getPreferredSize().width;
        int width2 = lvp.getPreferredSize().width;
        if (width1 >= width2) {
            ta.setSize(width1, 1);
        } else {
            ta.setSize(width2, 1);
        }
        ta.setEditable(false);
        Dimension textSize = ta.getPreferredSize();
        ta.setSize(textSize);

        c.gridx = 0;
        c.gridy = 5;
        c.gridwidth = 3;
        c.anchor = GridBagConstraints.WEST;
        c.insets = new Insets(5, 0, 5, 0);
        gridbag.setConstraints(ta, c);
        panel1.add(ta);

        workPanel.add(panel1, BorderLayout.NORTH);

        return (workPanel);
    }

    @Override
    public void doOK() {
    }

    @Override
    public void doApply() {
    }

    @Override
    public void doReset() {
    }

    @Override
    public void doCancel() {
    }

    @Override
    public void doClose() {
    }

    @Override
    public void doClear() {
        // Clear out all fields.
        jndiProps.clear();
        osText.setText("");
        checkBox.setSelected(true);
        comboBox.setSelectedIndex(0);
        valueText.setText("");

        delButton.setEnabled(false);
        chgButton.setEnabled(false);

        model.fireTableChanged(new TableModelEvent(model));

        osText.requestFocus();

        dirty = false;

    }

    /*
     * BEGIN INTERFACE ActionListener
     */
    @Override
    public void actionPerformed(ActionEvent e) {
        Object source = e.getSource();

        if (source == addButton) {
            doAdd();
        } else if (source == delButton) {
            doDelete();
        } else if (source == chgButton) {
            doChange();
        } else if (source == comboBox) {
            doComboBox();
            dirty = true;
        } else if (source == checkBox) {
            dirty = true;
        } else {
            super.actionPerformed(e);
        }
    }
    /*
     * END INTERFACE ActionListener
     */

    /*
     * BEGIN INTERFACE ListSelectionListener
     */
    @Override
    public void valueChanged(ListSelectionEvent e) {
        ListSelectionModel lsm = (ListSelectionModel) e.getSource();
        boolean isAdjusting = e.getValueIsAdjusting();
        // int firstIndex = e.getFirstIndex();
        // int lastIndex = e.getLastIndex();

        if (isAdjusting == false) {
            /*
             * Query model for selected index and get the object at the index.
             */
            if (lsm.isSelectionEmpty()) {
                delButton.setEnabled(false);
                chgButton.setEnabled(false);
            } else {
                //
                // Selected something in list so
                // change the combo box of properties and display its
                // value.
                //
                int selectedRow = lsm.getMinSelectionIndex();

                String selectedItem = (String) model.getValueAt(selectedRow, 0);
                comboBox.setSelectedItem(selectedItem);
                valueText.setText(jndiProps.getProperty(selectedItem));

                /*
                 * Change state of buttons only if this is an editable dialog by checking a text field. If not editable, then just leave
                 * buttons as is.
                 */
                if (isEditable()) {
                    delButton.setEnabled(true);
                    chgButton.setEnabled(true);
                }

                /*
                 * Dispatch a selection event. SelectionEvent se = new SelectionEvent(this, SelectionEvent.OBJ_SELECTED);
                 * se.setSelectedObj((ConsoleObj)o);
                 *
                 * fireAdminEventDispatched(se);
                 */
            }
        }
    }
    /*
     * END INTERFACE ListSelectionListener
     */

    public void doAdd() {

        //
        // Make sure a value was entered.
        //
        String value = (valueText.getText()).trim();
        if (value == null || value.equals("")) {
            JOptionPane.showOptionDialog(this, acr.getString(acr.E_NO_PROP_VALUE, comboBox.getSelectedItem()),
                    acr.getString(acr.I_OBJSTORE) + ": " + acr.getString(acr.I_ERROR_CODE, AdminConsoleResources.E_NO_PROP_VALUE), JOptionPane.YES_NO_OPTION,
                    JOptionPane.ERROR_MESSAGE, null, close, close[0]);
            valueText.requestFocus();
            return;
        }

        //
        // Check if the value has already been set.
        //
        String checkValue = jndiProps.getProperty((String) comboBox.getSelectedItem());
        if (checkValue != null) {
            JOptionPane.showOptionDialog(this, acr.getString(acr.E_PROP_VALUE_EXISTS, comboBox.getSelectedItem()),
                    acr.getString(acr.I_OBJSTORE) + ": " + acr.getString(acr.I_ERROR_CODE, AdminConsoleResources.E_PROP_VALUE_EXISTS),
                    JOptionPane.YES_NO_OPTION, JOptionPane.ERROR_MESSAGE, null, close, close[0]);
            return;
        }

        /*
         * Verify the value (if possible) if we're adding/changing the provider url.
         */
        if (((String) comboBox.getSelectedItem()).equals(Context.PROVIDER_URL)) {
            verifyProviderURL(value);
        }

        //
        // Add value to jndiProps
        //
        jndiProps.setProperty((String) comboBox.getSelectedItem(), value);

        //
        // Select the item in the list that was just added.
        //
        int index = 0;

        for (Enumeration e = jndiProps.propertyNames(); e.hasMoreElements();) {
            String propName = (String) e.nextElement();
            if (propName.equals(comboBox.getSelectedItem())) {
                break;
            }
            index++;
        }
        model.fireTableRowsInserted(index, index);
        table.setRowSelectionInterval(index, index);

    }

    public void doDelete() {

        //
        // Send table event that a row was deleted.
        //
        int index = 0;

        for (Enumeration e = jndiProps.propertyNames(); e.hasMoreElements();) {
            String propName = (String) e.nextElement();
            if (propName.equals(comboBox.getSelectedItem())) {
                break;
            }
            index++;
        }
        jndiProps.remove(comboBox.getSelectedItem());
        model.fireTableRowsDeleted(index, index);

        // Nothing is selected now so
        // disable these buttons and clear
        // out value field.
        addButton.setEnabled(true);
        delButton.setEnabled(false);
        chgButton.setEnabled(false);
        valueText.setText("");
    }

    public void doChange() {

        //
        // Make sure a value was entered.
        //
        String value = (valueText.getText()).trim();
        if (value == null || value.equals("")) {
            JOptionPane.showOptionDialog(this, acr.getString(acr.E_NO_PROP_VALUE, comboBox.getSelectedItem()),
                    acr.getString(acr.I_OBJSTORE) + ": " + acr.getString(acr.I_ERROR_CODE, AdminConsoleResources.E_NO_PROP_VALUE), JOptionPane.YES_NO_OPTION,
                    JOptionPane.ERROR_MESSAGE, null, close, close[0]);
            valueText.requestFocus();
            return;
        }

        /*
         * Verify the value (if possible) if we're adding/changing the provider url.
         */
        if (((String) comboBox.getSelectedItem()).equals(Context.PROVIDER_URL)) {
            verifyProviderURL(value);
        }

        //
        // Send table event that a row was updated.
        //
        int index = 0;

        for (Enumeration e = jndiProps.propertyNames(); e.hasMoreElements();) {
            String propName = (String) e.nextElement();
            if (propName.equals(comboBox.getSelectedItem())) {
                break;
            }
            index++;
        }
        jndiProps.setProperty((String) comboBox.getSelectedItem(), value);
        model.fireTableRowsUpdated(index, index);

    }

    /*
     * public void doUrlButton() { osText.setEnabled(false); urlLabel.setEnabled(true); }
     *
     * public void doOsTextButton() { osText.setEnabled(true); urlLabel.setEnabled(false); }
     */

    public void doComboBox() {
        String name = (String) comboBox.getSelectedItem();

        if (jndiProps == null) {
            valueText.setText("");
        }

        if (name != null) {
            String value = jndiProps.getProperty(name);
            /*
             * Stuff the value in the text area.
             */
            valueText.setText(jndiProps.getProperty(name));
            if (value != null) {
                //
                // Select the item in the list that was selected in
                // the combox box, if it exists.
                //
                int index = 0;
                for (Enumeration e = jndiProps.propertyNames(); e.hasMoreElements();) {
                    String propName = (String) e.nextElement();
                    if (propName.equals(name)) {
                        break;
                    }
                    index++;
                }
                table.setRowSelectionInterval(index, index);

                // Set the appropriate buttons, if editable
                if (isEditable()) {
                    addButton.setEnabled(false);
                    delButton.setEnabled(true);
                    chgButton.setEnabled(true);
                }
            } else {
                // Set the appropriate buttons, if editable
                if (isEditable()) {
                    addButton.setEnabled(true);
                    delButton.setEnabled(false);
                    chgButton.setEnabled(false);
                }
            }
            // Empty property list, nothing selected so only Add applies.
        } else if (name == null) {
            if (isEditable()) {
                addButton.setEnabled(true);
                delButton.setEnabled(false);
                chgButton.setEnabled(false);
            }
        }
    }

    protected int checkMandatoryProps() {

        //
        // Make sure a current set of mandatory attributes were
        // set.
        //
        String[] mandatoryNames = { Context.INITIAL_CONTEXT_FACTORY, Context.PROVIDER_URL };

        for (int i = 0; i < mandatoryNames.length; i++) {
            String propName = jndiProps.getProperty(mandatoryNames[i]);
            if (propName == null) {
                JOptionPane.showOptionDialog(this, acr.getString(acr.E_NO_JNDI_PROPERTY_VALUE, mandatoryNames[i]),
                        acr.getString(acr.I_ADD_OBJSTORE) + ": " + acr.getString(acr.I_ERROR_CODE, AdminConsoleResources.E_NO_JNDI_PROPERTY_VALUE),
                        JOptionPane.YES_NO_OPTION, JOptionPane.ERROR_MESSAGE, null, close, close[0]);
                // set the combo box to this property name and set cursor at the textfield.
                comboBox.setSelectedItem(mandatoryNames[i]);
                valueText.requestFocus();
                return (0);

            } else if (mandatoryNames[i].equals(Context.INITIAL_CONTEXT_FACTORY)) {
                // Validate the value of initial context provided.
                try {
                    Class.forName(propName);
                } catch (ClassNotFoundException e) {
                    JOptionPane.showOptionDialog(this, acr.getString(acr.E_CANNOT_INSTANTIATE, propName, mandatoryNames[i]),
                            acr.getString(acr.I_ADD_OBJSTORE) + ": " + acr.getString(acr.I_ERROR_CODE, AdminConsoleResources.E_CANNOT_INSTANTIATE),
                            JOptionPane.YES_NO_OPTION, JOptionPane.ERROR_MESSAGE, null, close, close[0]);
                    // Set the combo box this this property name and
                    // set cursor at the textfield.
                    comboBox.setSelectedItem(mandatoryNames[i]);
                    valueText.requestFocus();
                    return 0;
                }

            }
        }
        return 1;
    }

    protected String getDefaultStoreName(String baseName) {
        if (osMgr.getStore(baseName) == null) {
            return (baseName);
        }

        for (int i = 1; i < 1000; ++i) {
            String newStr = baseName + i;
            if (osMgr.getStore(newStr) == null) {
                return (newStr);
            }
        }

        return ("");
    }

    protected boolean isEditable() {
        return editable;
    }

    protected void setEditable(boolean editable) {

        this.editable = editable;

        if (editable) {
            osText.setEditable(true);
            valueText.setEditable(true);
            addButton.setEnabled(true);
            delButton.setEnabled(true);
            chgButton.setEnabled(true);
            ta.setText(acr.getString(acr.W_SAVE_AS_CLEAR_TEXT));
        } else {
            osText.setEditable(false);
            valueText.setEditable(false);
            addButton.setEnabled(false);
            delButton.setEnabled(false);
            chgButton.setEnabled(false);
            ta.setText(acr.getString(acr.W_OS_NOT_EDITABLE_TEXT));
        }
    }

    /*
     * Verify this provider URL value exists if we think they are specifying a file URL. If the file url does not exist,
     * just print a warning.
     */
    private void verifyProviderURL(String value) {

        boolean fileURL = false;
        File file = null;

        // Check if this if a file url by checking the initialContext type.
        String facInit = jndiProps.getProperty(Context.INITIAL_CONTEXT_FACTORY);
        if (facInit != null && !facInit.equals("")) {
            // If InitialContextFactory = RefFSContextFactory,
            // then this is probably a file url.
            if (facInit.equals("com.sun.jndi.fscontext.RefFSContextFactory")) {
                fileURL = true;
            }
        }

        // If we still don't know if this is a file URL, check if
        // the provider url value starts with "file:".
        if (!fileURL && value.startsWith("file:")) {
            fileURL = true;
        }

        // OK, we think they are specifying a file URL,
        // so let's see if this file URL exists.
        // If not, then print a warning.
        if (fileURL) {
            try {
                URI uri = new URI(value);
                file = new File(uri);
            } catch (Exception e) {
                try {
                    file = new File(value); // in case no "file:" specified.
                } catch (Exception ex) {
                    file = null; // do nothing - we tried.
                }
            }
            if (file != null && !file.isDirectory()) {
                JOptionPane.showOptionDialog(this, acr.getString(acr.W_PROVIDER_URL, Context.PROVIDER_URL, value),
                        acr.getString(acr.I_OBJSTORE) + ": " + acr.getString(acr.I_WARNING_CODE, acr.W_PROVIDER_URL), JOptionPane.YES_NO_OPTION,
                        JOptionPane.WARNING_MESSAGE, null, close, close[0]);
            }
        }

    }

    /*
     * TableModel class for Property Table. Note: This model assumes the objects at column = 0 are the ConsoleObj objects.
     */

    private static String[] columnNames = { acr.getString(acr.I_NAME), acr.getString(acr.I_VALUE) };

    class PropsTableModel extends AbstractTableModel {
        /**
         * 
         */
        private static final long serialVersionUID = -6685250332698377866L;

        /**
         * Returns the number of collumns in table.
         *
         * @return The number of collumns in table.
         */
        @Override
        public int getColumnCount() {

            return columnNames.length;
        }

        /**
         * Returns the number of rows in table.
         *
         * @return The number of rows in table.
         */
        @Override
        public int getRowCount() {
            if (jndiProps == null) {
                return 0;
            } else {
                return jndiProps.size();
            }
        }

        /**
         * Returns the collumn name/label for a given collumn.
         *
         * @return the collumn name/label for a given collumn.
         */
        @Override
        public String getColumnName(int col) {
            return columnNames[col];
        }

        /**
         * Return value at a particular table cell location. Calls the TabledInspector.getValueAtCollumn() method.
         */
        @Override
        public Object getValueAt(int row, int col) {

            if (jndiProps == null) {
                return "";
            }

            int i = 0;
            for (Enumeration e = jndiProps.propertyNames(); e.hasMoreElements();) {
                String propName = (String) e.nextElement();
                if (col == 0 && i == row) {
                    return propName;
                } else if (col == 1 && i == row) {
                    return jndiProps.getProperty(propName);
                }
                i++;
            }
            return "";
        }

        /**
         * Don't need to implement this method unless your table's data can change.
         */
        @Override
        public void setValueAt(Object value, int row, int col) {
        }

    }

    class ObjStoreDocumentListener implements DocumentListener {
        @Override
        public void insertUpdate(DocumentEvent e) {
            dirty = true;
        }

        @Override
        public void removeUpdate(DocumentEvent e) {
            dirty = true;
        }

        @Override
        public void changedUpdate(DocumentEvent e) {
            dirty = true;
        }
    }

}
