public void visitOutgoingDependencies(Collection<DependencyEdge> target) {
// If this configuration's version is in conflict, don't do anything
// If not traversed before, add all selected outgoing edges
// If traversed before, and the selected modules have changed, remove previous outgoing edges
// and add outgoing edges again with
// the new selections.
// If traversed before, and the selected modules have not changed, ignore
// If none of the incoming edges are transitive, then the node has no outgoing edges
if (moduleRevision.state != ModuleState.Selected) {
LOGGER.debug("version for {} is not selected. ignoring.", this);
return;
}
List<DependencyEdge> transitiveIncoming = new ArrayList<DependencyEdge>();
for (DependencyEdge edge : incomingEdges) {
if (edge.isTransitive()) {
transitiveIncoming.add(edge);
}
}
if (transitiveIncoming.isEmpty() && this != resolveState.root) {
if (previousTraversal != null) {
removeOutgoingEdges();
}
if (incomingEdges.isEmpty()) {
LOGGER.debug("{} has no incoming edges. ignoring.", this);
} else {
LOGGER.debug("{} has no transitive incoming edges. ignoring outgoing edges.", this);
}
return;
}
ModuleResolutionFilter resolutionFilter = getSelector(transitiveIncoming);
if (previousTraversal != null) {
if (previousTraversal.acceptsSameModulesAs(resolutionFilter)) {
LOGGER.debug(
"Changed edges for {} selects same versions as previous traversal. ignoring", this);
// Don't need to traverse again, but hang on to the new filter as the set of artifact may
// have changed
previousTraversal = resolutionFilter;
return;
}
removeOutgoingEdges();
}
for (DependencyMetaData dependency : metaData.getDependencies()) {
ModuleIdentifier targetModuleId =
DefaultModuleIdentifier.newId(
dependency.getRequested().getGroup(), dependency.getRequested().getName());
if (isExcluded(resolutionFilter, targetModuleId)) {
continue;
}
DependencyEdge dependencyEdge =
new DependencyEdge(this, dependency, resolutionFilter, resolveState);
outgoingEdges.add(dependencyEdge);
target.add(dependencyEdge);
}
previousTraversal = resolutionFilter;
}
/**
* Called when a change is made to a configuration node, such that its dependency graph
* <em>may</em> now be larger than it previously was, and the node should be visited.
*/
public void onMoreSelected(ConfigurationNode configuration) {
// Add to the end of the queue, so that we traverse the graph in breadth-wise order to pick up
// as many conflicts as
// possible before attempting to resolve them
if (queued.add(configuration)) {
queue.addLast(configuration);
}
}
public void addIncomingEdge(DependencyEdge dependencyEdge) {
incomingEdges.add(dependencyEdge);
resolveState.onMoreSelected(this);
}
public void addConfiguration(ConfigurationNode configurationNode) {
configurations.add(configurationNode);
}
public void addSelector(ModuleVersionSelectorResolveState selector) {
selectors.add(selector);
}
public void addUnattachedDependency(DependencyEdge edge) {
unattachedDependencies.add(edge);
}
/**
* Called when a change is made to a configuration node, such that its dependency graph
* <em>may</em> now be smaller than it previously was, and the node should be visited.
*/
public void onFewerSelected(ConfigurationNode configuration) {
// Add to the front of the queue, to flush out configurations that are no longer required.
if (queued.add(configuration)) {
queue.addFirst(configuration);
}
}