Android Open Source - FastBudget3 Category

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Back to project page FastBudget3.

License

The source code is released under:

GNU General Public License

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Java Source Code

package de.splitstudio.fastbudget3.db;
/*w  w  w .  j  a v a2 s.c om*/
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collections;
import java.util.Date;
import java.util.List;

import com.db4o.config.annotations.Indexed;

import de.splitstudio.utils.DateUtils;
import de.splitstudio.utils.db.UniqueEntity;

public class Category extends UniqueEntity implements Comparable<Category> {

  @Indexed
  public String name;

  public int budget;

  private final List<Expense> expenses = new ArrayList<Expense>();

  public Date date;

  public Category(String name, int budget, Date date) {
    this(name);
    this.budget = budget;
    this.date = date;
  }

  public Category(String name) {
    super();
    this.name = name;
  }

  public Category() {}

  /**
   * start or end may be null. in this case it means endless to this direction.
   */
  public int summarizeExpenses(Date start, Date end) {
    int sum = 0;
    for (Expense expense : expenses) {
      if (DateUtils.isBetween(start, expense.date, end)) {
        sum += expense.amount;
      }
    }
    return sum;
  }

  /**
   * Sorts descending by expenses size.
   */
  @Override
  public int compareTo(Category other) {
    int compareBySize = other.expenses.size() - expenses.size();
    if (compareBySize != 0) {
      return compareBySize;
    }
    return name.compareTo(other.name);
  }

  int calculateGrossBudget() {
    int budget = 0;
    Calendar startedMonth = Calendar.getInstance();
    startedMonth.setTime(date);

    Calendar currentMonth = Calendar.getInstance();
    while (!startedMonth.after(currentMonth)) {
      budget += this.budget;
      currentMonth.add(Calendar.MONTH, -1);
    }

    return budget;
  }

  public int calculateBudget() {
    Calendar lastMonth = DateUtils.createFirstDayOfMonth();
    lastMonth.add(Calendar.MILLISECOND, -1);
    return calculateGrossBudget() - summarizeExpenses(null, lastMonth.getTime());
  }

  public List<Expense> findExpenses(Date start, Date end) {
    List<Expense> expenses = new ArrayList<Expense>(this.expenses.size());
    for (Expense expense : this.expenses) {
      if (DateUtils.isBetween(start, expense.date, end)) {
        expenses.add(expense);
      }
    }
    return expenses;
  }

  public Category add(Expense expense) {
    //TreeSet is buggy with db4o
    if (!expenses.contains(expense)) {
      expenses.add(expense);
      Collections.sort(expenses);
    }
    return this;
  }

  public List<Expense> getExpenses() {
    return expenses;
  }

  public void remove(Expense expense) {
    expenses.remove(expense);
  }

}

Java Source Code List