// Java class to use instead of FileSystemObject On ASP
// Author: Walter D'Avila Neto 
// Dependencies
// 

package com.util.filesys;

import java.io.File;
import java.util.Vector;

// ---------------------------------------------------------------------------------------
// File System Class
// Obs: It should work very likely a dos linux " Command Prompt Commands " 
// Commands: ls, mkdir, rmdir etc..
// Other Interfaces:
//	 	getFolders , getFiles 	// for further information see on Method Declaration
// ---------------------------------------------------------------------------------------
public class FileSystemViewer {

	// ------------------------------------------------------------------------------------
	// Properies 
	public  File currentDir;				 // this is our Current Directory 

	// -------------------------------------------------------------------------------------
	// Construcotrs !!
	public FileSystemViewer (){
		// Oks Let us  make some conventions here... 
		// if no string is passad to construcotor 
		// We assume that "C:/" is valid at least.
		currentDir = new File("C:");
	}
	public FileSystemViewer (String aDirectory) {

		File testFile = new File (aDirectory);	

		// ok.. so  let's test this string to see if it's a valid dir
		if  ( testFile.exists() && testFile.isDirectory())	// So it's is Valid and it is a Folder
			this.currentDir = new File(aDirectory);  		// For god's sakes I want a pointer !!!
		else 
			this.currentDir = new File("C:");				// Just As Default Contructor
		testFile = null ;									// Let's put some order here !!!	
	}
	// -------------------------------------------------------------------------------------	

	// 
	// Also ..just as chDir or cd ..
	// 
	public boolean  chdir ( String aDir) {

		File tmpDir = new File(currentDir.getPath() + aDir);		// Case realtive path
		if ( tmpDir.exists() && tmpDir.isDirectory() ) {			// Check if This directory Exists and it is here !
			this.currentDir = tmpDir ;								// ok...
			return true;
		}
		else {														//  Case Absolute path
			tmpDir = new File ( aDir ) ;
			if ( tmpDir.exists() && tmpDir.isDirectory() ) {		// Is it a Absolute PAth Value ??
				this.currentDir = tmpDir ;							// ok
				return true;
			}
		}
		return false;												// not Valid Path
	}

	// -------------------------------------------------------------------------------------
	// Get Current Folders
	// -------------------------------------------------------------------------------------
	public File getFolder() {
		return currentDir;
	}

	// -------------------------------------------------------------------------------------
	// get A List of Files on Current Directory
	// -------------------------------------------------------------------------------------
	public File[] getFiles() {

		Vector arrayFiles = new Vector();									// Array of Files 
		File tmpFile = new File(currentDir.getPath());						// get CurrentDir

		String[] allFiles = tmpFile.list();									// Get a list of All "files" or itens on this Directory

		// here we will interate over all Files on current Dir 
		// checkig in each file is it's a File or not.
		for ( int iCounter = 0 ; iCounter < allFiles.length ; iCounter++ ){	
			tmpFile = new File(currentDir.getPath() + "\\" + allFiles[iCounter]);	
			if ( tmpFile.isFile()  )										// Is this a File (or Non Folder..) ?
				arrayFiles.addElement( tmpFile );							// 
		}

		File[] returnFileList = new File[arrayFiles.size()];				// Create New File List to retun the Values!
		arrayFiles.copyInto(returnFileList);								// Copy Values on our Vector To return List
		return returnFileList;												// return the list
	}


	// ---------------------------------------------------------------
	//	Get All Folder from Current Folder (this)
	// ---------------------------------------------------------------
	public File[] getSubFolders (){

		Vector arrayFolders = new Vector();									// Array of Folders
		File tmpFile = new File(currentDir.getPath());						// get CurrentDir

		String[] allFiles = tmpFile.list();									// Get a list of All "files" or itens on this Directory

		// here we will interate over all Files on current Dir 
		// checkig in each file is it's a Folder or not.
		for ( int iCounter = 0 ; iCounter < allFiles.length ; iCounter++ ){
			tmpFile = new File(currentDir.getPath() + "\\" + allFiles[iCounter]);
			if ( tmpFile.isDirectory())	{									// Is this a Folder ?
				arrayFolders.addElement( tmpFile );
			}
		}	

		File[] returnFileList = new File[arrayFolders.size()];				// Create New String List to retun the Values!
		arrayFolders.copyInto(returnFileList);								// Copy Values on our Vector To return List
		return returnFileList;												// return the list

	}

}