/** Creates an initial marking. */
private void createMarking() {
HNSet set = null;
marking = null;
marking = new HashMap[size];
// Building the marking data structure. This structure is an array of
// hashmaps.
// For a given hashmap, we have:
// - Key: Integer = element
// - Value: HashMap = subsets + the number of tokens associated to them
// The idea is to keep track of which tasks fired and the number of
// tokens at their output subsets.
// Initially, the number of tokens is 0.
for (int i = 0; i < size; i++) {
set = hNet.getOutputSet(i);
HashMap map = new HashMap();
for (int j = 0; j < set.size(); j++) {
map.put(set.get(j), new Integer(0));
}
marking[i] = map;
}
auxMapping = new MappingToSubsets(hNet);
this.reset();
}
/**
* Adds tokens to the output places of a given element
*
* @param element element to fire
*/
private void addTokensOutputPlaces(int element) {
/*
* Pseudo-code: 1. Retrieve all elements in the OUT set of 'element' 2.
* Increase the number of tokens for every output element
*/
HNSet set = null;
// update global counter for number of tokens
// note that OR-situations count as a single token.
set = hNet.getOutputSet(element);
if (set.size() == 0) { // element is connected to the end place
numberTokens++;
endPlace++;
} else {
numberTokens += set.size();
}
// update marking...
for (int iSet = 0; iSet < set.size(); iSet++) {
increaseNumberTokens(element, set.get(iSet));
}
}
/**
* Build an initial marking for a given heuristics net.
*
* @param net an enhanced heuristics net to which the initial marking must be built.
* @throws java.lang.NullPointerException whenever the net has disconnected elements. An element
* is disconnected when its INPUT or OUTPUT set is null.
*/
public MarkingHeuristicsNet(HeuristicsNet net, Random generator) throws NullPointerException {
this.generator = generator;
size = net.size();
hNet = net;
// checking if all input and output sets are DIFFERENT from null...
for (int i = 0; i < size; i++) {
if (hNet.getInputSet(i) == null || hNet.getOutputSet(i) == null) {
throw new NullPointerException("Net has disconnected elements!!");
}
}
createMarking();
}
private void buildMapping(HeuristicsNet hn) {
HNSet outputSubsets;
HNSubSet outputSubset;
int taskInSubset;
mapping = new HNSet[hn.size()][hn.size()];
for (int task = 0; task < hn.size(); task++) {
outputSubsets = hn.getOutputSet(task);
for (int iOutputSubsets = 0; iOutputSubsets < outputSubsets.size(); iOutputSubsets++) {
// inserting for every element
outputSubset = outputSubsets.get(iOutputSubsets);
for (int iSubset = 0; iSubset < outputSubset.size(); iSubset++) {
taskInSubset = outputSubset.get(iSubset);
insertInMapping(taskInSubset, task, outputSubset);
}
}
}
}
