/**
* Locate each unexpanded Structure|Sequence and: 1. check that none of its fields is referenced
* => do not expand 2. add all of its fields as leaves Note that #2 may end up adding additional
* leaf structs &/or seqs
*/
public void expand() {
// Create a queue of unprocessed leaf compounds
Queue<DapVariable> queue = new ArrayDeque<DapVariable>();
for (int i = 0; i < variables.size(); i++) {
DapVariable var = variables.get(i);
if (!var.isTopLevel()) continue;
// prime the queue
if (var.getSort() == DapSort.STRUCTURE || var.getSort() == DapSort.SEQUENCE) {
DapStructure struct = (DapStructure) var; // remember Sequence subclass Structure
if (expansionCount(struct) == 0) queue.add(var);
}
}
// Process the queue in prefix order
while (queue.size() > 0) {
DapVariable vvstruct = queue.remove();
DapStructure dstruct = (DapStructure) vvstruct;
for (DapVariable field : dstruct.getFields()) {
if (findVariableIndex(field) < 0) {
// Add field as leaf
this.segments.add(new Segment(field));
this.variables.add(field);
}
if (field.getSort() == DapSort.STRUCTURE || field.getSort() == DapSort.SEQUENCE) {
if (expansionCount((DapStructure) field) == 0) queue.add(field);
}
}
}
this.expansion = Expand.EXPANDED;
}
/**
* Locate each Structure|Sequence and: 1. check that all of its fields are referenced recursively
* and not constrained, otherwise ignore 2. contract by removing all of the fields of the
* Structure or Sequence. This is intended to be (not quite) the dual of expand();
*/
public void contract() {
// Create a set of contracted compounds
Set<DapStructure> contracted = new HashSet<>();
for (int i = 0; i < variables.size(); i++) {
DapVariable var = variables.get(i);
if (var.isTopLevel()) {
if (var.getSort() == DapSort.STRUCTURE || var.getSort() == DapSort.SEQUENCE) {
contractR((DapStructure) var, contracted);
}
}
}
this.expansion = Expand.CONTRACTED;
}