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Fix container inefficiency in HeuristicSearch.java #490

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Fix container inefficiency in HeuristicSearch.java #490

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15 changes: 12 additions & 3 deletions src/main/gov/nasa/jpf/search/heuristic/HeuristicSearch.java
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Original file line number Diff line number Diff line change
Expand Up @@ -55,12 +55,18 @@ public abstract class HeuristicSearch extends Search {
*/
protected boolean isBeamSearch;

/*
* allocate childStates on needed (useChildStates == true)
*/
protected boolean useChildStates;


public HeuristicSearch (Config config, VM vm) {
super(config, vm);

useAstar = config.getBoolean("search.heuristic.astar");
isBeamSearch = config.getBoolean("search.heuristic.beam_search");
useChildStates = config.getBoolean("search.heuristic.child_states");
}


Expand Down Expand Up @@ -104,8 +110,9 @@ void backtrackToParent () {
* explicit termination request
*/
protected boolean generateChildren () {

childStates = new ArrayList<HeuristicState>();
if (useChildStates) {
childStates = new ArrayList<HeuristicState>();
}

while (!done) {

Expand Down Expand Up @@ -146,7 +153,9 @@ protected boolean generateChildren () {

HeuristicState newHState = queueCurrentState();
if (newHState != null) {
childStates.add(newHState);
if (useChildStates) {
childStates.add(newHState);
}
notifyStateStored();
}
}
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