public BeanAttributeList(BeanElement parent) 
{
        this.parent = parent;
        Object data = parent.getData();
        Class beanClass = (data != null) ? data.getClass() : null;
        this.beanMetaData = BeanMetaData.get(beanClass);
        this.attributes = new BeanAttribute[beanMetaData.attributeCount()];
}

 public BeanAttributeList(BeanElement parent,
    BeanMetaData beanMetaData) 
{
        this.parent = parent;
        this.beanMetaData = beanMetaData;
        this.attributes = new BeanAttribute[beanMetaData.attributeCount()];
}

 public boolean add(Object object) 
{
        throw new UnsupportedOperationException("add(Object) unsupported");
}

 public  void add(int index,
    Object object) 
{
        throw new UnsupportedOperationException("add(int,Object) unsupported");
}

 public Attribute attribute(String name) 
{
        int index = beanMetaData.getIndex(name);
        return attribute(index);
}

 public Attribute attribute(QName qname) 
{
        int index = beanMetaData.getIndex(qname);
        return attribute(index);
}

 public BeanAttribute attribute(int index) 
{
        if ((index  >= 0) && (index < = attributes.length)) {
            BeanAttribute attribute = attributes[index];
            if (attribute == null) {
                attribute = createAttribute(parent, index);
                attributes[index] = attribute;
            }
            return attribute;
        }
        return null;
}

 public  void clear() 
{
        for (int i = 0, size = attributes.length; i <  size; i++) {
            BeanAttribute attribute = attributes[i];
            if (attribute != null) {
                attribute.setValue(null);
            }
        }
}

 protected BeanAttribute createAttribute(BeanElement element,
    int index) 
{
        return new BeanAttribute(this, index);
}

 public Object get(int index) 
{
        BeanAttribute attribute = attributes[index];
        if (attribute == null) {
            attribute = createAttribute(parent, index);
            attributes[index] = attribute;
        }
        return attribute;
}

 public Object getData(int index) 
{
        return beanMetaData.getData(index, parent.getData());
}

 public BeanElement getParent() 
{
        return parent;
}

 public QName getQName(int index) 
{
        return beanMetaData.getQName(index);
}

 public boolean remove(Object object) 
{
        return false;
}

 public Object remove(int index) 
{
        BeanAttribute attribute = (BeanAttribute) get(index);
        Object oldValue = attribute.getValue();
        attribute.setValue(null);
        return oldValue;
}

 public Object set(int index,
    Object object) 
{
        throw new UnsupportedOperationException("set(int,Object) unsupported");
}

 public  void setData(int index,
    Object data) 
{
        beanMetaData.setData(index, parent.getData(), data);
}

 public int size() 
{
        return attributes.length;
}