public void separateIncomeAndExpense() {
CategoryTree<Category> newCategories = new CategoryTree<Category>();
Category income = new Category();
income.id = INCOME_CATEGORY_ID;
income.makeThisCategoryIncome();
income.title = "<INCOME>";
Category expense = new Category();
expense.id = EXPENSE_CATEGORY_ID;
expense.makeThisCategoryExpense();
expense.title = "<EXPENSE>";
for (Category category : categories) {
if (category.id <= 0) {
newCategories.add(category);
} else {
if (category.isIncome()) {
income.addChild(category);
} else {
expense.addChild(category);
}
}
}
if (income.hasChildren()) {
newCategories.add(income);
}
if (expense.hasChildren()) {
newCategories.add(expense);
}
categories = newCategories;
}
