OAF中为MessageTextInput添加加事件处理

public Number getUnitPrice() {
return (Number) getAttributeInternal(UNITPRICE);
}

public void setUnitPrice(Number value) {
    Number quantity = this.getQuantity();    
    if("".equals(quantity) || quantity==null){
        quantity=0;
    }
    this.setTotal(value.multiply(quantity))
setAttributeInternal(UNITPRICE, value);
}

public Number getQuantity() {
return (Number) getAttributeInternal(QUANTITY);
}        

public void setQuantity(Number value) {
    Number unitPrice = this.getUnitPrice();    
    if("".equals(unitPrice) || unitPrice==null){
        unitPrice=0;
    }
    this.setTotal(value.multiply(unitPrice))

setAttributeInternal(QUANTITY, value);
}


public Number getTotal() {
return (Number) getAttributeInternal(TOTAL);
}

public void setTotal(Number value) {
setAttributeInternal(TOTAL, value);
}