Overview | File | Class | Tree | Index | Help
PREV NEXT | FRAMES NO FRAMES

## file.js

#### Summary

General File I/O Class

Class Summary
File | Class implementing basic support for files

    /**
     *  ---------
     * |.##> <##.|  Open Smart Card Development Platform (www.openscdp.org)
     * |#       #|
     * |#       #|  Copyright (c) 1999-2006 CardContact Software & System Consulting
     * |'##> <##'|  Andreas Schwier, 32429 Minden, Germany (www.cardcontact.de)
     *  ---------
     *
     *  This file is part of OpenSCDP.
     *
     *  OpenSCDP is free software; you can redistribute it and/or modify
     *  it under the terms of the GNU General Public License version 2 as
     *  published by the Free Software Foundation.
     *
     *  OpenSCDP 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 for more details.
     *
     *  You should have received a copy of the GNU General Public License
     *  along with OpenSCDP; if not, write to the Free Software
     *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
     *
     * @fileoverview General File I/O Class
     */

    /**
     * Create a reference to a file system object (file or directory)
     *
     * @class Class implementing basic support for files
     * @constructor
     * @param {String} name relative or absolute file path
     */
    function File(name) {
    	this.name = name;
    }

    /**
     * Return absolute path
     *
     * @param{Number} mode one of GPSystem.AUTO, GPSystem.CWD, GPSystem.USR or GPSystem.SYS. See GPSystem.mapFilename() for details
     * @type String
     * @return the absolute path
     */
    File.prototype.getAbsolutePath = function(mode) {
    	if (typeof(mode) == "undefined") {
    		mode = GPSystem.CWD;
    	}
    	if (typeof(this.abspath) == "undefined") {
    		this.abspath = GPSystem.mapFilename(this.name, mode);
    	}
    	return this.abspath;
    }

    /**
     * @private
     * Return a java.io.File object
     */
    File.prototype.getFile = function() {
    	if (typeof(this.file) == "undefined") {
    		this.file = new java.io.File(this.getAbsolutePath(GPSystem.AUTO));
    	}
    	return this.file;
    }

    /**
     * Close streams associated with file
     */
    File.prototype.close = function() {
    	if (typeof(this.os) != "undefined") {
    		this.os.close();
    		delete(this.os);
    	}

    	if (typeof(this.is) != "undefined") {
    		this.is.close();
    		delete(this.is);
    	}
    }

    /**
     * @private
     * Return a java.io.FileInputStream
     */
    File.prototype.getInputStream = function() {
    	if (typeof(this.is) == "undefined") {
    		this.is = new java.io.FileInputStream(this.getAbsolutePath(GPSystem.AUTO));
    	}
    	return this.is;
    }

    /**
     * @private
     * Return a java.io.FileOutputStream
     */
    File.prototype.getOutputStream = function() {
    	if (typeof(this.os) == "undefined") {
    		this.os = new java.io.FileOutputStream(this.getAbsolutePath(GPSystem.CWD));
    	}
    	return this.os;
    }

    /**
     * Read complete file into ByteString object
     *
     * @type ByteString
     * @return the binary content
     */
    File.prototype.readAllAsBinary = function() {
    	var is = this.getInputStream();

    	// Determine file size
    	var flen = is.available();

    	// Allocate native byte array
    	var bs = java.lang.reflect.Array.newInstance(java.lang.Byte.TYPE, flen);

    	// Read into byte array
    	var len = is.read(bs);

    	this.close();

    	// Allocate JavaScript ByteBuffer from native/wrapped byte array
    	var bb = new ByteBuffer(bs);

    	// Convert to JavaScript ByteString
    	var data = bb.toByteString();

    	return data;
    }

    /**
     * Read complete file into String object
     *
     * @type String
     * @return the text content
     */
    File.prototype.readAllAsString = function(encoding) {

    	if (typeof(encoding) == "undefined") {
    		encoding = UTF8;
    	}

    	return this.readAllAsBinary().toString(encoding);
    }

    /**
     * Write the object to file
     *
     * @param{Object} obj to write to file (Using toString() for any other than String and ByteString)
     * @param{Number} one of UTF8 or ASCII (Default is UTF8)
     */
    File.prototype.writeAll = function(obj, encoding) {
    	if ((typeof(obj) != "string") && !(obj instanceof ByteString)) {
    		obj = obj.toString();
    	}
    	if (typeof(obj) == "string") {
    		if (typeof(encoding) == "undefined") {
    			encoding = UTF8;
    		}
    		obj = new ByteString(obj, encoding);
    	}

    	var os = this.getOutputStream();
    	os.write(obj);
    	this.close();
    }

    /**
     * Return list of files contained in the directory referenced by the File object
     *
     * @type String[]
     * @return the list of file names
     */
    File.prototype.list = function() {
    	var list = this.getFile().list();
    	var jslist = [];

    	for (var i = 0; i < list.length; i++) {
    		jslist.push(new String(list[i]));
    	}
    	return jslist;
    }

    /**
     * Return the parent file of this file object
     *
     * @type File
     * @return the parent file object or null
     */
    File.prototype.getParentFile = function() {
    	var file = this.getFile();
    	var parent = file.getParent();
    	if (parent == null) {
    		return null;
    	}
    	return new File(parent);
    }

    File.test = function() {
    	var file = new File("test.bin");
    	var b = new ByteString("Hello World", ASCII);
    	file.writeAll(b);

    	var file = new File("test.bin");
    	var c = file.readAllAsBinary();
    	print(c.toString(ASCII));

    	var file = new File("test.txt");
    	var s = "Hello World";
    	file.writeAll(s);

    	var file = new File("test.txt");
    	var c = file.readAllAsString();
    	print(c);

    	var dir = file.getParentFile();
    	print(dir.getAbsolutePath());
    	print(dir.list());

    }

Overview | File | Class | Tree | Index | Help
PREV NEXT | FRAMES NO FRAMES

Documentation generated by JSDoc on Thu Jun 25 17:01:35 2026