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/**
*
*/
package de.fhswf.in.inf.java1.aufgabe05;
import java.math.BigDecimal;
/**
* An implementation of the Konto class which represents a bank account.
*
* @author $Author: $
* @version $Revision: $, $Date: $ UTC
*/
public class Konto
{
private BigDecimal guthaben;
private BigDecimal dispo;
private Person besitzer;
/**
* Creates an account with an owner, a dispo and an initial balance.
*
* @param besitzer
* Owner of the account
* @param dispo
* Dispo of the account
*/
public Konto(Person besitzer, BigDecimal dispo)
{
if (besitzer == null)
{
throw new IllegalArgumentException("Besitzer can't be null");
}
if (dispo == null)
{
throw new IllegalArgumentException("Dispo can't be null");
}
if (dispo.compareTo(BigDecimal.ZERO) < 0)
{
throw new IllegalArgumentException("Dispo can't be negative");
}
this.besitzer = besitzer;
this.dispo = dispo;
this.guthaben = new BigDecimal(0);
this.besitzer.addKonto(this);
}
/**
* Function for withdrawing money from the account.
*
* @param betrag
* Amount of cash to be withdrawn
*/
public void abheben(BigDecimal betrag)
{
if (betrag == null)
{
throw new IllegalArgumentException("Betrag can't be null");
}
if (betrag.compareTo(BigDecimal.ZERO) < 0)
{
throw new IllegalArgumentException("Betrag can't be negative");
}
if (guthaben.add(dispo).compareTo(betrag) < 0)
{
throw new IllegalArgumentException("Betrag surpasses dispo limit");
}
guthaben = guthaben.subtract(betrag);
}
/**
* Function to deposit money into the account.
*
* @param betrag
* Amount of cash to be disposed
*/
public void einzahlen(BigDecimal betrag)
{
if (betrag == null)
{
throw new IllegalArgumentException("Betrag can't be null");
}
if (betrag.compareTo(BigDecimal.ZERO) < 0)
{
throw new IllegalArgumentException("Betrag can't be negative");
}
guthaben = guthaben.add(betrag);
}
/**
* Returns the actual balance.
*
* @return Returns the actual balance.
*/
public BigDecimal getKontostand()
{
return guthaben;
}
/**
* Just to get the owners name.
*
* @return Returns the owners name.
*/
public Person getBesitzer()
{
return besitzer;
}
}
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