Account.java

package postingrules;

/*Generated by MPS */

import java.util.List;
import java.util.ArrayList;
import mf.Currency;
import mf.Money;
import mf.MfDate;
import mf.DateRange;

public class Account {
  private List<Entry> myEntries = new ArrayList<Entry>();
  private Currency myCurrency;
  private AccountType myType;
  public Account(Currency currency) {
    this(currency, null);
  }
  public Account(Currency currency, AccountType type) {
    this.myCurrency = currency;
    this.myType = type;
  }
  public void addEntry(Entry arg) {
    ensureSameCurrency(arg.getAmount());
    myEntries.add(arg);
    arg.setAccount(this);
  }
  /*package*/ void addEntry(Money amount, MfDate date) {
    final Entry e = new Entry(amount, date);
    addEntry(e);
  }
  private void ensureSameCurrency(Money arg) {
    if (!(arg.currency().equals(myCurrency))) {
      throw new IllegalArgumentException("New item has incompatable currency");
    }
  }
  public Money balance() {
    return balance(MfDate.today());
  }
  /*package*/ Money balance(DateRange period) {
    Money result = new Money(0, myCurrency);
    for (Entry e : myEntries) {
      if (period.includes(e.getDate())) {
        result = result.add(e.getAmount());
      }
    }
    return result;
  }
  /*package*/ Money balance(MfDate date) {
    return balance(DateRange.upTo(date));
  }
  public Account copy() {
    Account result = new Account(myCurrency, myType);
    for (Entry e : myEntries) {
      result.addEntry(e.copy());
    }
    return result;
  }
  /*package*/ Money deposits(DateRange period) {
    Money result = new Money(0, myCurrency);
    for (Entry each : myEntries) {
      if (period.includes(each.getDate()) && each.getAmount().isPositive()) {
        result = result.add(each.getAmount());
      }
    }
    return result;
  }
  public Entry[] entries() {
    return myEntries.toArray(new Entry[0]);
  }
  /*package*/ boolean isValid() {
    return allMyEntriesReferToMe();
  }
  /*package*/ boolean allMyEntriesReferToMe() {
    for (Entry e : myEntries) {
      if (e.getAccount() != this) {
        return false;
      }
    }
    return true;
  }
  @Override
  public String toString() {
    return "Acc: " + myType;
  }
  /*package*/ AccountType type() {
    return myType;
  }
  /*package*/ void withdraw(Money amount, Account target, MfDate date) {
    new AccountingTransaction(amount, this, target, date);
  }
  /*package*/ Money withdrawels(DateRange period) {
    Money result = new Money(0, myCurrency);
    for (Entry each : myEntries) {
      if (period.includes(each.getDate()) && each.getAmount().isNegative()) {
        result = result.add(each.getAmount());
      }
    }
    return result;
  }
}