/*
* @(#)FolderTreeNode.java 1.8 01/05/23
*
* Copyright 1997-2000 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND
* ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES OR LIABILITIES
* SUFFERED BY LICENSEE AS A RESULT OF OR RELATING TO USE, MODIFICATION
* OR DISTRIBUTION OF THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL
* SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR
* FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS
* BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that Software is not designed, licensed or intended
* for use in the design, construction, operation or maintenance of any
* nuclear facility.
*/
import javax.swing.tree.DefaultMutableTreeNode;
import javax.mail.Store;
import javax.mail.Folder;
import javax.mail.MessagingException;
/**
* Node which represents a Folder in the javax.mail apis.
*
* @version 1.8, 01/05/23
* @author Christopher Cotton
*/
public class FolderTreeNode extends DefaultMutableTreeNode {
protected Folder folder = null;
protected boolean hasLoaded = false;
/**
* creates a tree node that points to the particular Store.
*
* @param what the store for this node
*/
public FolderTreeNode(Folder what) {
super(what);
folder = what;
}
/**
* a Folder is a leaf if it cannot contain sub folders
*/
public boolean isLeaf() {
try {
if ((folder.getType() & Folder.HOLDS_FOLDERS) == 0)
return true;
} catch (MessagingException me) { }
// otherwise it does hold folders, and therefore not
// a leaf
return false;
}
/**
* returns the folder for this node
*/
public Folder getFolder() {
return folder;
}
/**
* return the number of children for this folder node. The first
* time this method is called we load up all of the folders
* under the store's defaultFolder
*/
public int getChildCount() {
if (!hasLoaded) {
loadChildren();
}
return super.getChildCount();
}
protected void loadChildren() {
// if it is a leaf, just say we have loaded them
if (isLeaf()) {
hasLoaded = true;
return;
}
try {
// Folder[] sub = folder.listSubscribed();
Folder[] sub = folder.list();
// add a FolderTreeNode for each Folder
int num = sub.length;
for(int i = 0; i < num; i++) {
FolderTreeNode node = new FolderTreeNode(sub[i]);
// we used insert here, since add() would make
// another recursive call to getChildCount();
insert(node, i);
}
} catch (MessagingException me) {
me.printStackTrace();
}
}
/**
* override toString() since we only want to display a folder's
* name, and not the full path of the folder
*/
public String toString() {
return folder.getName();
}
}
|