import java.util.function.Supplier;

/**
 * Allows recording and querying the input locations of a build.
 */
public class BuildInputHierarchy {
    private volatile ValuedVfsHierarchy<InputDeclaration> root;
    private final SingleFileTreeElementMatcher matcher;

    public BuildInputHierarchy(CaseSensitivity caseSensitivity, Stat stat) {
        this.root = ValuedVfsHierarchy.emptyHierarchy(caseSensitivity);

import java.util.Set;

public class AccumulateBuildInputsListener implements WorkInputListener {

    private final BuildInputHierarchy buildInputHierarchy;

    public AccumulateBuildInputsListener(BuildInputHierarchy buildInputHierarchy) {
        this.buildInputHierarchy = buildInputHierarchy;
    }

    @Override
    public void onExecute(UnitOfWork work, EnumSet<InputBehavior> relevantBehaviors) {

    private final Map<Path, FileWatcherRegistry.Type> aggregatedEvents = new LinkedHashMap<>();
    private final BuildInputHierarchy buildInputs;
    private final Runnable onRelevantChangeAction;
    private int moreChangesCount;
    private boolean errorWhenWatching;

    public FileEventCollector(BuildInputHierarchy buildInputs, Runnable onRelevantChangeAction) {
        this.buildInputs = buildInputs;

        BuildActionRunner.Result lastResult;
        PendingChangesListener pendingChangesListener = listenerManager.getBroadcaster(PendingChangesListener.class);
        while (true) {
            BuildInputHierarchy buildInputs = new BuildInputHierarchy(caseSensitivity, stat);
            ContinuousBuildTriggerHandler continuousBuildTriggerHandler = new ContinuousBuildTriggerHandler(
                cancellationToken,