/*
* Copyright (c) 2008, 2010, 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 com.codename1.components;
import com.codename1.io.FileSystemStorage;
import com.codename1.io.Log;
import com.codename1.ui.tree.TreeModel;
import java.util.Vector;
/**
* A tree model representing the file system as a whole, notice that this class returns absolute
* file names which would result in an unreadable tree. To fix this you can create a Tree object
* and override functionality such as the childToDisplayLabel method like this:
* <code>
Tree fileTree = new Tree(new FileTreeModel(true)) {
protected String childToDisplayLabel(Object child) {
if (((String) child).endsWith("/")) {
return ((String) child).substring(((String) child).lastIndexOf('/', ((String) child).length() - 2));
}
return ((String) child).substring(((String) child).lastIndexOf('/'));
}
};
</code>
*
* @author Shai Almog
*/
public class FileTreeModel implements TreeModel {
private boolean showFiles;
private Vector ext;
/**
* Construct a filesystem tree model
*
* @param showFiles indicates whether this is a directory only view or a whole filesystem view
*/
public FileTreeModel(boolean showFiles) {
this.showFiles = showFiles;
}
/**
* Shows only files with the given extension
*
* @param extension the file extension to display
*/
public void addExtensionFilter(String extension){
if(ext == null){
ext = new Vector();
}
ext.addElement(extension);
}
/**
* {@inheritDoc}
*/
public Vector getChildren(Object parent) {
Vector response = new Vector();
try {
if(parent == null) {
String[] roots = FileSystemStorage.getInstance().getRoots();
for(int iter = 0 ; iter < roots.length ; iter++) {
response.addElement(roots[iter]);
}
} else {
String name = (String)parent;
if(!name.endsWith("/")) {
name += "/";
}
String[] res = FileSystemStorage.getInstance().listFiles(name);
if(res != null){
if(showFiles) {
for(int iter = 0 ; iter < res.length ; iter++) {
String f = res[iter];
if(!FileSystemStorage.getInstance().isDirectory(name + f) && ext != null){
int i = f.lastIndexOf('.');
if(i > 0){
String e = f.substring(i + 1, f.length());
if(ext.contains(e)){
response.addElement(name + f);
}
}
}else{
response.addElement(name + f);
}
}
} else {
for(int iter = 0 ; iter < res.length ; iter++) {
if(FileSystemStorage.getInstance().isDirectory(name + res[iter])) {
response.addElement(name + res[iter]);
}
}
}
}
}
} catch(Throwable err) {
Log.e(err);
return new Vector();
}
return response;
}
/**
* {@inheritDoc}
*/
public boolean isLeaf(Object node) {
return !FileSystemStorage.getInstance().isDirectory((String)node);
}
}