Class QueryNodeReplacer

public void replaceFields(Field[] oldFields,
                          Field[] neoFields,
                          Expression exp)

Replace the references to old field by references to new fields in an expression (Recusrive method).

Parameters:

oldFields - the list of old field to replace

neoFields - the list of new field replacing the old

exp - is the current medor expression to treat.

public QueryTree replaceNode(QueryTree old,
                             QueryTree neo,
                             QueryTree root)

Replace a QueryTree by another. this is doing by replacing the usage of its field in all tree.

Parameters:

old - is the node to replace

neo - is the new node replacing the old

root - is the QueryTree from the search must start.

Returns:

if the root queryTree is the one searched, then the newer is returned, otherwise the root QueryTree is returned.