Examples with WorkspaceChanges org.eclipse.n4js.xtext.workspace.WorkspaceChanges used on opensource projects

Example 6 with WorkspaceChanges

use of org.eclipse.n4js.xtext.workspace.WorkspaceChanges in project n4js by eclipse.

the class N4JSWorkspaceConfig method recomputeSemanticDependenciesIfNecessary.

/**
 * The list of {@link N4JSProjectConfig#getSemanticDependencies() semantic dependencies} of
 * {@link N4JSProjectConfig}s is tricky for three reasons:
 * <ol>
 * <li>the semantic dependencies do not contain names of non-existing projects (in case of unresolved project
 * references in the package.json),
 * <li>the order of the semantic dependencies depends on the characteristics of the target projects (mainly the
 * {@link ProjectDescription#getDefinesPackage() "defines package"} property),
 * <li>each implicitly added dependency to a definition project PI depends on the characteristics of the target
 * project PT triggering this implicit dependency (i.e. the defined project) <em>and</em> the overall workspace
 * contents (Are definition projects available in the workspace for project PT?).
 * </ol>
 * Therefore, the "semantic dependencies" of a project P can change even without a change in the
 * <code>package.json</code> file of P. To detect and apply these changes is the purpose of this method.
 */
protected WorkspaceChanges recomputeSemanticDependenciesIfNecessary(WorkspaceConfigSnapshot oldWorkspaceConfig, WorkspaceChanges changes) {
    boolean needRecompute = !changes.getAddedProjects().isEmpty() || !changes.getRemovedProjects().isEmpty() || Iterables.any(changes.getChangedProjects(), pc -> affectedByPropertyChanges(pc, oldWorkspaceConfig));
    if (needRecompute) {
        List<ProjectConfigSnapshot> projectsWithChangedSemanticDeps = new ArrayList<>();
        for (XIProjectConfig pc : getProjects()) {
            String projectID = pc.getName();
            N4JSProjectConfigSnapshot oldSnapshot = (N4JSProjectConfigSnapshot) oldWorkspaceConfig.findProjectByID(projectID);
            if (oldSnapshot == null) {
                continue;
            }
            // convert to list in next line, because we want the below #equals() check to also include the order:
            List<String> oldSemanticDeps = new ArrayList<>(oldSnapshot.getDependencies());
            List<String> newSemanticDeps = ((N4JSProjectConfig) pc).getSemanticDependencies().stream().map(ProjectDependency::getPackageName).collect(Collectors.toList());
            if (!newSemanticDeps.equals(oldSemanticDeps)) {
                ProjectConfigSnapshot newSnapshot = configSnapshotFactory.createProjectConfigSnapshot(pc);
                if (!newSnapshot.equals(oldSnapshot)) {
                    projectsWithChangedSemanticDeps.add(newSnapshot);
                }
            }
        }
        if (!projectsWithChangedSemanticDeps.isEmpty()) {
            changes = changes.merge(WorkspaceChanges.createProjectsChanged(projectsWithChangedSemanticDeps));
        }
    }
    return changes;
}