/*

 * Copyright (c) 2004, 2012, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sun.tools.jconsole.inspector;

import javax.swing.*;

import java.awt.BorderLayout;

import java.awt.GridLayout;

import java.awt.FlowLayout;

import java.awt.Component;

import java.awt.event.*;

import java.util.*;

import javax.management.*;

import sun.tools.jconsole.MBeansTab;

import sun.tools.jconsole.JConsole;

import sun.tools.jconsole.Messages;

public abstract class XOperations extends JPanel implements ActionListener {

    public final static String OPERATION_INVOCATION_EVENT =

            "jam.xoperations.invoke.result";

    private java.util.List<NotificationListener> notificationListenersList;

    private Hashtable<JButton, OperationEntry> operationEntryTable;

    private XMBean mbean;

    private MBeanInfo mbeanInfo;

    private MBeansTab mbeansTab;

    public XOperations(MBeansTab mbeansTab) {

        super(new GridLayout(1, 1));

        this.mbeansTab = mbeansTab;

        operationEntryTable = new Hashtable<JButton, OperationEntry>();

        ArrayList<NotificationListener> l =

                new ArrayList<NotificationListener>(1);

        notificationListenersList =

                Collections.synchronizedList(l);

    }

    // Call on EDT

    public void removeOperations() {

        removeAll();

    }

    // Call on EDT

    public void loadOperations(XMBean mbean, MBeanInfo mbeanInfo) {

        this.mbean = mbean;

        this.mbeanInfo = mbeanInfo;

        // add operations information

        MBeanOperationInfo operations[] = mbeanInfo.getOperations();

        invalidate();

        // remove listeners, if any

        Component listeners[] = getComponents();

        for (int i = 0; i < listeners.length; i++) {

            if (listeners[i] instanceof JButton) {

                ((JButton) listeners[i]).removeActionListener(this);

            }

        }

        removeAll();

        setLayout(new BorderLayout());

        JButton methodButton;

        JLabel methodLabel;

        JPanel innerPanelLeft, innerPanelRight;

        JPanel outerPanelLeft, outerPanelRight;

        outerPanelLeft = new JPanel(new GridLayout(operations.length, 1));

        outerPanelRight = new JPanel(new GridLayout(operations.length, 1));

        for (int i = 0; i < operations.length; i++) {

            innerPanelLeft = new JPanel(new FlowLayout(FlowLayout.RIGHT));

            innerPanelRight = new JPanel(new FlowLayout(FlowLayout.LEFT));

            String returnType = operations[i].getReturnType();

            if (returnType == null) {

                methodLabel = new JLabel("null", JLabel.RIGHT);

                if (JConsole.isDebug()) {

                    System.err.println(

                            "WARNING: The operation's return type " +

                            "shouldn't be \"null\". Check how the " +

                            "MBeanOperationInfo for the \"" +

                            operations[i].getName() + "\" operation has " +

                            "been defined in the MBean's implementation code.");

                }

            } else {

                methodLabel = new JLabel(

                        Utils.getReadableClassName(returnType), JLabel.RIGHT);

            }

            innerPanelLeft.add(methodLabel);

            if (methodLabel.getText().length() > 20) {

                methodLabel.setText(methodLabel.getText().

                        substring(methodLabel.getText().

                        lastIndexOf(".") + 1,

                        methodLabel.getText().length()));

            }

            methodButton = new JButton(operations[i].getName());

            methodButton.setToolTipText(operations[i].getDescription());

            boolean callable = isCallable(operations[i].getSignature());

            if (callable) {

                methodButton.addActionListener(this);

            } else {

                methodButton.setEnabled(false);

            }

            MBeanParameterInfo[] signature = operations[i].getSignature();

            OperationEntry paramEntry = new OperationEntry(operations[i],

                    callable,

                    methodButton,

                    this);

            operationEntryTable.put(methodButton, paramEntry);

            innerPanelRight.add(methodButton);

            if (signature.length == 0) {

                innerPanelRight.add(new JLabel("( )", JLabel.CENTER));

            } else {

                innerPanelRight.add(paramEntry);

            }

            outerPanelLeft.add(innerPanelLeft, BorderLayout.WEST);

            outerPanelRight.add(innerPanelRight, BorderLayout.CENTER);

        }

        add(outerPanelLeft, BorderLayout.WEST);

        add(outerPanelRight, BorderLayout.CENTER);

        validate();

    }

    private boolean isCallable(MBeanParameterInfo[] signature) {

        for (int i = 0; i < signature.length; i++) {

            if (!Utils.isEditableType(signature[i].getType())) {

                return false;

            }

        }

        return true;

    }

    // Call on EDT

    public void actionPerformed(final ActionEvent e) {

        performInvokeRequest((JButton) e.getSource());

    }

    void performInvokeRequest(final JButton button) {

        final OperationEntry entryIf = operationEntryTable.get(button);

        new SwingWorker<Object, Void>() {

            @Override

            public Object doInBackground() throws Exception {

                return mbean.invoke(button.getText(),

                        entryIf.getParameters(), entryIf.getSignature());

            }

            @Override

            protected void done() {

                try {

                    Object result = get();

                    // sends result notification to upper level if

                    // there is a return value

                    if (entryIf.getReturnType() != null &&

                            !entryIf.getReturnType().equals(Void.TYPE.getName()) &&

                            !entryIf.getReturnType().equals(Void.class.getName())) {

                        fireChangedNotification(OPERATION_INVOCATION_EVENT, button, result);

                    } else {

                        new ThreadDialog(

                                button,

                                Messages.METHOD_SUCCESSFULLY_INVOKED,

                                Messages.INFO,

                                JOptionPane.INFORMATION_MESSAGE).run();

                    }

                } catch (Throwable t) {

                    t = Utils.getActualException(t);

                    if (JConsole.isDebug()) {

                        t.printStackTrace();

                    }

                    new ThreadDialog(

                            button,

                            Messages.PROBLEM_INVOKING + " " +

                            button.getText() + " : " + t.toString(),

                            Messages.ERROR,

                            JOptionPane.ERROR_MESSAGE).run();

                }

            }

        }.execute();

    }

    public void addOperationsListener(NotificationListener nl) {

        notificationListenersList.add(nl);

    }

    public void removeOperationsListener(NotificationListener nl) {

        notificationListenersList.remove(nl);

    }

    // Call on EDT

    private void fireChangedNotification(

            String type, Object source, Object handback) {

        Notification n = new Notification(type, source, 0);

        for (NotificationListener nl : notificationListenersList) {

            nl.handleNotification(n, handback);

        }

    }

    protected abstract MBeanOperationInfo[] updateOperations(MBeanOperationInfo[] operations);

}