/*
* Copyright (C) 2009-2013 Geometer Plus <contact@geometerplus.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
package org.geometerplus.fbreader.library;
import java.util.Collections;
import java.util.List;
import org.geometerplus.fbreader.book.Author;
import org.geometerplus.fbreader.book.Book;
import org.geometerplus.fbreader.book.BookEvent;
public class AuthorListTree extends FirstLevelTree {
AuthorListTree(RootTree root) {
super(root, ROOT_BY_AUTHOR);
}
@Override
public Status getOpeningStatus() {
return Status.ALWAYS_RELOAD_BEFORE_OPENING;
}
@Override
public void waitForOpening() {
clear();
for (Author a : Collection.authors()) {
createAuthorSubTree(a);
}
}
@Override
public boolean onBookEvent(BookEvent event, Book book) {
switch (event) {
case Added:
case Updated:
{
// TODO: remove empty authors tree after update (?)
final List<Author> bookAuthors = book.authors();
boolean changed = false;
if (bookAuthors.isEmpty()) {
changed &= createAuthorSubTree(Author.NULL);
} else for (Author a : bookAuthors) {
changed &= createAuthorSubTree(a);
}
return changed;
}
case Removed:
// TODO: remove empty authors tree (?)
return false;
default:
return false;
}
}
private boolean createAuthorSubTree(Author author) {
final AuthorTree temp = new AuthorTree(Collection, author);
int position = Collections.binarySearch(subTrees(), temp);
if (position >= 0) {
return false;
} else {
new AuthorTree(this, author, - position - 1);
return true;
}
}
}