source: main/trunk/greenstone3/src/java/org/greenstone/admin/guiext/Command.java@ 21994

package org.greenstone.admin.guiext;

import org.w3c.dom.Element;

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

import java.util.HashMap;

import javax.swing.JFrame;
import javax.swing.JTextArea;
import javax.swing.JOptionPane;

public class Command implements Runnable
{
    HashMap _osCommands = new HashMap();
    CommandStep _parent = null;

    public Command(Element commandElement, CommandStep parent) 
    {
    _parent = parent;                       

    if(commandElement != null){
        Element[] commands = ExtXMLHelper.getMultipleChildElements(commandElement, "os", true);
        for(int i = 0; i < commands.length; i++){
        Element currentCommand = commands[i];
        String os = currentCommand.getAttribute("name");

        if(os.equals("")){
            System.err.println("A <" + ExtXMLHelper.COMMAND + "> element does not have an \"os\" attribute");
        }
        else{
            _osCommands.put(os, ExtXMLHelper.getValueFromSingleElement(currentCommand, true));
        }
        }
    }
    else{
        System.err.println("This <" + ExtXMLHelper.COMMAND + "> element is null");
    }
    }

    public void run()
    {
    JTextArea messageArea = _parent.getMessageArea();
    String command = getCommandForCurrentOS();
    
    if(command == null){
        System.err.println("No commands exist for your current operating system, to avoid seeing this warning please place <os name=\"default\"/> into the set of commands for this step in the extension_project_list.xml file located in your extension directory");
        _parent.threadError();
        return;
    }
    else if(command == ""){
        _parent.threadError();
        return;
    }
        
    File workingDirectory = new File(_parent.getParent().getParent().getExtensionDirectory());
    Process commandLineProc = null;
    try{
        messageArea.append("\nExecuting \"" + command + "\" on the command line\n");
        commandLineProc = Runtime.getRuntime().exec(command, null, workingDirectory);
        
        BufferedReader stdInput = new BufferedReader(new InputStreamReader(commandLineProc.getInputStream()));
        BufferedReader errInput = new BufferedReader(new InputStreamReader(commandLineProc.getErrorStream()));
        String s= "";
        
        while ((s = stdInput.readLine()) != null) {
        messageArea.append(s + "\n");
        messageArea.setSelectionEnd(messageArea.getDocument().getLength());
        }  
        
        boolean error = false;
        while ((s = errInput.readLine()) != null){
        messageArea.append(s + "\n");
        error = true;
        }  
        
        if(error){
        JOptionPane.showMessageDialog(new JFrame(), "There was an error while running the command line process");   
        _parent.threadError();
        return;
        }
        
        int success = commandLineProc.waitFor();
        
        if(success != 0){
        System.err.println("Command line process \"" + command  + "\" returned unsuccessfully with the value \"" + success + "\"");
        _parent.threadError();
        return;
        }
    }
    catch(Exception ex){
        ex.printStackTrace();
        _parent.threadError();
        return;
    } 
    _parent.startNextThread();
    }

    public boolean executeCommand()
    {
    return false;
    }

    public CommandStep getParent()
    {
    return _parent;
    }

    public String getCommandForCurrentOS()
    {
    String currentos = System.getProperty("os.name");

    String command = (String)_osCommands.get(currentos);
    if(command != null){
        return command;
    }
    
    if(currentos.contains("Windows")){
        command = (String)_osCommands.get("Windows");
        
        if(command != null){
        return command;
        }   
    }
    return (String)_osCommands.get("default");
    }
}