source: main/trunk/greenstone3/src/java/org/greenstone/admin/guiext/CommandStep.java@ 21919

package org.greenstone.admin.guiext;

import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

import java.util.ArrayList;

import java.awt.BorderLayout;

import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

import javax.swing.JTextArea;
import javax.swing.JButton;
import javax.swing.JPanel;

import java.lang.reflect.Constructor;
import java.lang.reflect.Method;

import java.io.File;
import java.io.BufferedReader;
import java.io.InputStreamReader;

import org.greenstone.admin.GAI;
import org.greenstone.admin.LoggedMessageArea;

public class CommandStep extends Step
{
    protected ArrayList _commandsAndCallbacks = new ArrayList();
    protected LoggedMessageArea _messageArea = new LoggedMessageArea(this.getClass());
    protected int _threadCount = -1;

    /*
    Command[] _commands = null;
    Callback[] _callbacks = null;
    */

    public CommandStep(Element commandStepElement, SequenceList parent)
    {
    super(commandStepElement, parent);
    
    if(commandStepElement != null){
        NodeList commandAndCallbackElements = commandStepElement.getElementsByTagName("*");

        for(int i = 0; i < commandAndCallbackElements.getLength(); i++){
        Element currentChild = (Element)commandAndCallbackElements.item(i);
        if(currentChild.getTagName().equalsIgnoreCase(ExtXMLHelper.COMMAND)){
            _commandsAndCallbacks.add(new Command(currentChild, this));
        }
        else if (currentChild.getTagName().equalsIgnoreCase(ExtXMLHelper.CALLBACK)){
            _commandsAndCallbacks.add(new Callback(currentChild, this));
        }
        else if (currentChild.getTagName().equalsIgnoreCase(ExtXMLHelper.OS)){
        }
        else{
            System.err.println(currentChild.getTagName() + "A child of this command <" + ExtXMLHelper.STEP + "> is not either a <" + ExtXMLHelper.CALLBACK + "> element or a <" + ExtXMLHelper.COMMAND  + "> element");
        }
        }

        if(_commandsAndCallbacks.size() == 0){
        System.err.println("This command step does not have any <" + ExtXMLHelper.COMMAND  + "> or <" + ExtXMLHelper.CALLBACK  +"> elements");
        }

        _button.addActionListener(new CommandButtonListener());

    }
    else{
        System.err.println("This command <" + ExtXMLHelper.STEP + "> element is null");
    }
    }

    public class CommandButtonListener implements ActionListener
    {
    public void actionPerformed(ActionEvent e)
    {
        ExtensionInformation info = _parent.getParent();

        JPanel panel = new JPanel();
        panel.setLayout(new BorderLayout());
        panel.add(_messageArea, BorderLayout.CENTER);
        info.changeExtPane(panel);

        _button.setEnabled(false);
        _button.setText("Running...");

        _threadCount = 0;
        Thread newThread = new Thread((Runnable)_commandsAndCallbacks.get(0));
        newThread.start();
    }
    }

    public JTextArea getMessageArea()
    {
    return _messageArea;
    }

    public void threadError()
    {
    _button.setText(_label);
    _button.setEnabled(true);
    }

    public void startNextThread()
    {
    _threadCount++;

    if(_threadCount < _commandsAndCallbacks.size()){
        Thread newThread = new Thread((Runnable)_commandsAndCallbacks.get(_threadCount));
        newThread.start();
    }
    else{
        _button.setText(_label);
        _button.setEnabled(true);
        _parent.registerStepCompletion(CommandStep.this);
    }
    }
}