/**
* Updates the column's inner list elements if the column element already exists or if a new
* column was added.
*
* @param currentColEle
* @param elem
* @param row
* @param col
* @param value
*/
public void updateColumnListElements(
RowColumnElement currentColEle, Element elem, int row, int col, Object value) {
Element temp = elem;
Element currentList = currentColEle.getList();
int elemRowIdx = elem.rowIndex();
while (currentList.getBottom() != null && currentList.getBottom().rowIndex() < elemRowIdx) {
currentList = currentList.getBottom();
}
if (currentList.getBottom() != null && currentList.getBottom().rowIndex() == elemRowIdx) {
currentList.getBottom().value = elem.value;
return;
}
temp.setBottom(currentList.getBottom());
currentList.setBottom(temp);
}
/**
* Updates the row's inner list elements if the row element already exists or if a new row was
* added.
*
* @param currentRowEle
* @param elem
* @param row
* @param col
* @param value
*/
public void updateRowListElements(
RowColumnElement currentRowEle, Element elem, int row, int col, Object value) {
Element temp = elem;
Element currentList = currentRowEle.getList();
int elemColIdx = elem.columnIndex();
while (currentList.getNext() != null && currentList.getNext().columnIndex() < elemColIdx) {
currentList = currentList.getNext();
}
if (currentList.getNext() != null && currentList.getNext().columnIndex() == elemColIdx) {
currentList.getNext().value = elem.value;
return;
}
temp.setNext(currentList.getNext());
currentList.setNext(temp);
}
/**
* Returns the object stored at (row,col), if such an element exists, or the default value, if not
* such an element exists. Utilizing the column elements, it first locates the correct column's
* inner list elements and then traverses through them till it reaches a match with the
* corresponding row index.
*/
@Override
public Object elementAt(int row, int col) {
RowColumnElement currentColumnEle = columnElementHead.getNext();
Element currentList;
while (currentColumnEle != null) {
if (currentColumnEle.getIndex() == col) {
currentList = currentColumnEle.getList();
while (currentList != null) {
if (currentList.rowIndex() == row) {
return currentList.value();
}
currentList = currentList.getBottom();
}
}
currentColumnEle = currentColumnEle.getNext();
}
return defaultEle;
}
private InnerElementIterator(RowColumnElement currentNode, boolean type) {
rowIndex = currentNode.index;
colIndex = currentNode.index;
currentListHead = currentNode.getList();
result = type;
}
