private void uninstall()

in vault-core/src/main/java/org/apache/jackrabbit/vault/packaging/impl/JcrPackageImpl.java [991:1057]
55 lines of code
18 McCabe index (conditional complexity)

    private void uninstall(Set<PackageId> processed, ImportOptions opts) throws RepositoryException, PackageException, IOException {
        getDefinition();
        if (def != null) {
            processed.add(def.getId());
        }
        if (opts.getDependencyHandling() != null && opts.getDependencyHandling() != DependencyHandling.IGNORE) {
            uninstallUsages(processed, opts);
        }

        JcrPackage snap = getSnapshot();
        List<PackageId> subPackages = snap == null
                ? def.getSubPackages()
                : ((JcrPackageDefinitionImpl) snap.getDefinition()).getSubPackages();

        if (snap == null) {
            if (opts.isStrict(mgr.isStrictByDefault())) {
                throw new PackageException("Unable to uninstall package. No snapshot present.");
            }
            log.warn("Unable to revert package content {}. Snapshot missing.", getDefinition().getId());
            if (opts.getListener() != null) {
                opts.getListener().onMessage(ProgressTrackerListener.Mode.TEXT, "Unable to revert package content. Snapshot missing.", "");
            }

        } else {
            Session s = getNode().getSession();
            // check for recursive uninstall
            if (!opts.isNonRecursive() && subPackages.size() > 0) {
                JcrPackageManagerImpl packMgr = new JcrPackageManagerImpl(mgr);
                for (PackageId id : subPackages) {
                    try (JcrPackage pack = packMgr.open(id)) {
                        if (pack != null) {
                            if (pack.getSnapshot() == null) {
                                log.warn("Unable to uninstall sub package {}. Snapshot missing.", id);
                            } else {
                                pack.uninstall(opts);
                            }
                        }
                    }
                }
            }

            if (opts.getListener() != null) {
                opts.getListener().onMessage(ProgressTrackerListener.Mode.TEXT, "Uninstalling package from snapshot " + snap.getDefinition().getId(), "");
            }
            // override import mode
            opts.setImportMode(ImportMode.REPLACE);
            snap.extract(opts);
            snap.getNode().remove();
            s.save();
        }

        // uninstallation always removes the sub-packages, unless non-recursive and snapshot missing
        if (!opts.isNonRecursive() || snap != null) {
            for (PackageId id : subPackages) {
                if (mgr.contains(id)) {
                    mgr.remove(id);
                }
            }
        }

        // revert installed flags on this package
        JcrPackageDefinitionImpl def = (JcrPackageDefinitionImpl) getDefinition();
        def.clearLastUnpacked(true);

        mgr.dispatch(PackageEvent.Type.UNINSTALL, def.getId(), null);

    }