2 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
9 package org.opendaylight.yangtools.yang.model.util;
11 import com.google.common.base.Preconditions;
12 import com.google.common.base.Strings;
13 import com.google.common.collect.Collections2;
14 import com.google.common.collect.ImmutableSet.Builder;
15 import com.google.common.collect.ImmutableSetMultimap;
16 import com.google.common.collect.Lists;
17 import com.google.common.collect.Maps;
18 import com.google.common.collect.Multimap;
19 import com.google.common.collect.Multimaps;
20 import com.google.common.collect.SetMultimap;
21 import com.google.common.collect.TreeMultimap;
23 import java.util.Collection;
24 import java.util.Collections;
25 import java.util.List;
27 import java.util.Optional;
29 import java.util.TreeMap;
30 import java.util.function.Function;
31 import javax.annotation.concurrent.Immutable;
32 import org.opendaylight.yangtools.yang.common.Revision;
33 import org.opendaylight.yangtools.yang.model.api.Module;
34 import org.opendaylight.yangtools.yang.model.api.ModuleImport;
35 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
38 public final class FilteringSchemaContextProxy extends AbstractSchemaContext {
40 //collection to be filled with filtered modules
41 private final Set<Module> filteredModules;
43 //collections to be filled in with filtered data
44 private final SetMultimap<URI, Module> namespaceToModules;
45 private final SetMultimap<String, Module> nameToModules;
48 * Filters SchemaContext for yang modules.
50 * @param delegate original SchemaContext
51 * @param rootModules modules (yang schemas) to be available and all their dependencies (modules importing
52 * rootModule and whole chain of their imports)
53 * @param additionalModuleIds (additional) modules (yang schemas) to be available and whole chain of their imports
55 public FilteringSchemaContextProxy(final SchemaContext delegate, final Collection<ModuleId> rootModules,
56 final Set<ModuleId> additionalModuleIds) {
57 Preconditions.checkNotNull(rootModules, "Base modules cannot be null.");
58 Preconditions.checkNotNull(additionalModuleIds, "Additional modules cannot be null.");
60 final Builder<Module> filteredModulesBuilder = new Builder<>();
61 final SetMultimap<URI, Module> nsMap = Multimaps.newSetMultimap(new TreeMap<>(),
62 AbstractSchemaContext::createModuleSet);
63 final SetMultimap<String, Module> nameMap = Multimaps.newSetMultimap(new TreeMap<>(),
64 AbstractSchemaContext::createModuleSet);
66 // preparing map to get all modules with one name but difference in revision
67 final TreeMultimap<String, Module> nameToModulesAll = getStringModuleTreeMultimap();
69 nameToModulesAll.putAll(getStringModuleMap(delegate));
71 // in case there is a particular dependancy to view filteredModules/yang models dependancy is checked
72 // for module name and imports
73 processForRootModules(delegate, rootModules, filteredModulesBuilder);
75 // adding additional modules
76 processForAdditionalModules(delegate, additionalModuleIds, filteredModulesBuilder);
78 filteredModulesBuilder.addAll(getImportedModules(
79 Maps.uniqueIndex(delegate.getModules(), ModuleId.MODULE_TO_MODULE_ID::apply),
80 filteredModulesBuilder.build(), nameToModulesAll));
83 * Instead of doing this on each invocation of getModules(), pre-compute
84 * it once and keep it around -- better than the set we got in.
86 this.filteredModules = filteredModulesBuilder.build();
88 for (final Module module : filteredModules) {
89 nameMap.put(module.getName(), module);
90 nsMap.put(module.getNamespace(), module);
93 namespaceToModules = ImmutableSetMultimap.copyOf(nsMap);
94 nameToModules = ImmutableSetMultimap.copyOf(nameMap);
97 private static TreeMultimap<String, Module> getStringModuleTreeMultimap() {
98 return TreeMultimap.create(String::compareTo, REVISION_COMPARATOR);
101 private static void processForAdditionalModules(final SchemaContext delegate,
102 final Set<ModuleId> additionalModuleIds, final Builder<Module> filteredModulesBuilder) {
103 filteredModulesBuilder.addAll(Collections2.filter(delegate.getModules(),
104 module -> selectAdditionalModules(module, additionalModuleIds)));
107 private void processForRootModules(final SchemaContext delegate, final Collection<ModuleId> rootModules,
108 final Builder<Module> filteredModulesBuilder) {
109 filteredModulesBuilder.addAll(Collections2.filter(delegate.getModules(),
110 module -> checkModuleDependency(module, rootModules)));
113 private static Multimap<String, Module> getStringModuleMap(final SchemaContext delegate) {
114 return Multimaps.index(delegate.getModules(), Module::getName);
117 //dealing with imported module other than root and directly importing root
118 private static Collection<Module> getImportedModules(final Map<ModuleId, Module> allModules,
119 final Set<Module> baseModules, final TreeMultimap<String, Module> nameToModulesAll) {
121 List<Module> relatedModules = Lists.newLinkedList();
123 for (Module module : baseModules) {
124 for (ModuleImport moduleImport : module.getImports()) {
125 Optional<Revision> revisionDate = moduleImport.getRevision();
126 if (!revisionDate.isPresent()) {
127 revisionDate = nameToModulesAll.get(moduleImport.getModuleName()).last().getRevision();
130 ModuleId key = new ModuleId(moduleImport.getModuleName(), revisionDate);
131 Module importedModule = allModules.get(key);
133 Preconditions.checkArgument(importedModule != null,
134 "Invalid schema, cannot find imported module: %s from module: %s, %s, modules:%s", key,
135 module.getQNameModule(), module.getName(), allModules);
136 relatedModules.add(importedModule);
138 //calling imports recursive
139 relatedModules.addAll(getImportedModules(allModules, Collections.singleton(importedModule),
144 return relatedModules;
148 public Set<Module> getModules() {
149 return filteredModules;
153 protected SetMultimap<URI, Module> getNamespaceToModules() {
154 return namespaceToModules;
158 protected SetMultimap<String, Module> getNameToModules() {
159 return nameToModules;
162 private static boolean selectAdditionalModules(final Module module, final Set<ModuleId> additionalModules) {
163 return additionalModules.contains(new ModuleId(module.getName(), module.getRevision()));
166 //check for any dependency regarding given string
167 private boolean checkModuleDependency(final Module module, final Collection<ModuleId> rootModules) {
169 for (ModuleId rootModule : rootModules) {
171 if (rootModule.equals(new ModuleId(module.getName(), module.getRevision()))) {
175 //handling/checking imports regarding root modules
176 for (ModuleImport moduleImport : module.getImports()) {
178 if (moduleImport.getModuleName().equals(rootModule.getName())) {
180 if (moduleImport.getRevision().isPresent()
181 && !moduleImport.getRevision().equals(rootModule.getRev())) {
189 //submodules handling
190 for (Module moduleSub : module.getSubmodules()) {
191 return checkModuleDependency(moduleSub, rootModules);
199 public String toString() {
200 return String.format("SchemaContextProxyImpl{filteredModules=%s}", filteredModules);
203 public static final class ModuleId {
204 private final String name;
205 private final Revision rev;
207 public ModuleId(final String name, final Optional<Revision> rev) {
208 Preconditions.checkArgument(!Strings.isNullOrEmpty(name),
209 "No module dependency name given. Nothing to do.");
211 Preconditions.checkArgument(rev.isPresent(), "No revision date given. Nothing to do.");
212 this.rev = rev.get();
215 public String getName() {
219 public Optional<Revision> getRev() {
220 return Optional.ofNullable(rev);
223 public static final Function<Module, ModuleId> MODULE_TO_MODULE_ID = input -> new ModuleId(input.getName(),
224 input.getRevision());
227 public boolean equals(final Object obj) {
231 if (!(obj instanceof ModuleId)) {
235 ModuleId moduleId = (ModuleId) obj;
236 if (name != null ? !name.equals(moduleId.name) : moduleId.name != null) {
239 if (rev != null ? !rev.equals(moduleId.rev) : moduleId.rev != null) {
247 public int hashCode() {
248 int result = name != null ? name.hashCode() : 0;
249 result = 31 * result + (rev != null ? rev.hashCode() : 0);
254 public String toString() {
255 return String.format("ModuleId{name='%s', rev=%s}",name,rev);