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
8 package org.opendaylight.yangtools.yang.model.util;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static java.util.Objects.requireNonNull;
13 import com.google.common.base.Preconditions;
14 import com.google.common.base.Strings;
15 import com.google.common.collect.Collections2;
16 import com.google.common.collect.ImmutableMap;
17 import com.google.common.collect.ImmutableSet;
18 import com.google.common.collect.ImmutableSet.Builder;
19 import com.google.common.collect.ImmutableSetMultimap;
20 import com.google.common.collect.Maps;
21 import com.google.common.collect.Multimap;
22 import com.google.common.collect.Multimaps;
23 import com.google.common.collect.SetMultimap;
24 import com.google.common.collect.TreeMultimap;
26 import java.util.ArrayList;
27 import java.util.Collection;
28 import java.util.Collections;
29 import java.util.LinkedList;
30 import java.util.List;
32 import java.util.Optional;
34 import java.util.TreeMap;
35 import java.util.function.Function;
36 import org.opendaylight.yangtools.yang.common.QNameModule;
37 import org.opendaylight.yangtools.yang.common.Revision;
38 import org.opendaylight.yangtools.yang.model.api.Module;
39 import org.opendaylight.yangtools.yang.model.api.ModuleImport;
40 import org.opendaylight.yangtools.yang.model.api.ModuleLike;
41 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
42 import org.opendaylight.yangtools.yang.model.api.Submodule;
44 public final class FilteringSchemaContextProxy extends AbstractSchemaContext {
45 private final ImmutableMap<QNameModule, Module> moduleMap;
47 //collection to be filled with filtered modules
48 private final ImmutableSet<Module> filteredModules;
50 //collections to be filled in with filtered data
51 private final ImmutableSetMultimap<URI, Module> namespaceToModules;
52 private final ImmutableSetMultimap<String, Module> nameToModules;
55 * Filters SchemaContext for yang modules.
57 * @param delegate original SchemaContext
58 * @param rootModules modules (yang schemas) to be available and all their dependencies (modules importing
59 * rootModule and whole chain of their imports)
60 * @param additionalModuleIds (additional) modules (yang schemas) to be available and whole chain of their imports
62 public FilteringSchemaContextProxy(final SchemaContext delegate, final Collection<ModuleId> rootModules,
63 final Set<ModuleId> additionalModuleIds) {
64 requireNonNull(rootModules, "Base modules cannot be null.");
65 requireNonNull(additionalModuleIds, "Additional modules cannot be null.");
67 final Builder<Module> filteredModulesBuilder = new Builder<>();
69 // preparing map to get all modules with one name but difference in revision
70 final TreeMultimap<String, Module> nameToModulesAll = TreeMultimap.create(String::compareTo,
73 nameToModulesAll.putAll(getStringModuleMap(delegate));
75 // in case there is a particular dependency to view filteredModules/YANG models dependency is checked
76 // for module name and imports
77 processForRootModules(delegate, rootModules, filteredModulesBuilder);
79 // adding additional modules
80 processForAdditionalModules(delegate, additionalModuleIds, filteredModulesBuilder);
82 filteredModulesBuilder.addAll(getImportedModules(
83 Maps.uniqueIndex(delegate.getModules(), ModuleId.MODULE_TO_MODULE_ID::apply),
84 filteredModulesBuilder.build(), nameToModulesAll));
87 * Instead of doing this on each invocation of getModules(), pre-compute it once and keep it around.
89 final List<Module> sortedModules = new ArrayList<>(filteredModulesBuilder.build());
90 sortedModules.sort(NAME_REVISION_COMPARATOR);
91 this.filteredModules = ImmutableSet.copyOf(sortedModules);
93 final SetMultimap<URI, Module> nsMap = Multimaps.newSetMultimap(new TreeMap<>(),
94 AbstractSchemaContext::createModuleSet);
95 final SetMultimap<String, Module> nameMap = Multimaps.newSetMultimap(new TreeMap<>(),
96 AbstractSchemaContext::createModuleSet);
97 final ImmutableMap.Builder<QNameModule, Module> moduleMapBuilder = ImmutableMap.builder();
98 for (final Module module : filteredModules) {
99 nameMap.put(module.getName(), module);
100 nsMap.put(module.getNamespace(), module);
101 moduleMapBuilder.put(module.getQNameModule(), module);
104 namespaceToModules = ImmutableSetMultimap.copyOf(nsMap);
105 nameToModules = ImmutableSetMultimap.copyOf(nameMap);
106 moduleMap = moduleMapBuilder.build();
109 private static void processForAdditionalModules(final SchemaContext delegate,
110 final Set<ModuleId> additionalModuleIds, final Builder<Module> filteredModulesBuilder) {
111 filteredModulesBuilder.addAll(Collections2.filter(delegate.getModules(),
112 module -> selectAdditionalModules(module, additionalModuleIds)));
115 private void processForRootModules(final SchemaContext delegate, final Collection<ModuleId> rootModules,
116 final Builder<Module> filteredModulesBuilder) {
117 filteredModulesBuilder.addAll(Collections2.filter(delegate.getModules(),
118 module -> checkModuleDependency(module, rootModules)));
121 private static Multimap<String, ? extends Module> getStringModuleMap(final SchemaContext delegate) {
122 return Multimaps.index(delegate.getModules(), Module::getName);
125 //dealing with imported module other than root and directly importing root
126 private static Collection<Module> getImportedModules(final Map<ModuleId, ? extends Module> allModules,
127 final Collection<? extends Module> baseModules, final TreeMultimap<String, Module> nameToModulesAll) {
129 List<Module> relatedModules = new LinkedList<>();
131 for (Module module : baseModules) {
132 for (ModuleImport moduleImport : module.getImports()) {
133 Optional<Revision> revisionDate = moduleImport.getRevision();
134 if (revisionDate.isEmpty()) {
135 revisionDate = nameToModulesAll.get(moduleImport.getModuleName()).first().getRevision();
138 ModuleId key = new ModuleId(moduleImport.getModuleName(), revisionDate);
139 Module importedModule = allModules.get(key);
141 Preconditions.checkArgument(importedModule != null,
142 "Invalid schema, cannot find imported module: %s from module: %s, %s, modules:%s", key,
143 module.getQNameModule(), module.getName(), allModules);
144 relatedModules.add(importedModule);
146 //calling imports recursive
147 relatedModules.addAll(getImportedModules(allModules, Collections.singleton(importedModule),
152 return relatedModules;
156 public Set<Module> getModules() {
157 return filteredModules;
161 protected Map<QNameModule, Module> getModuleMap() {
166 protected SetMultimap<URI, Module> getNamespaceToModules() {
167 return namespaceToModules;
171 protected SetMultimap<String, Module> getNameToModules() {
172 return nameToModules;
175 private static boolean selectAdditionalModules(final Module module, final Set<ModuleId> additionalModules) {
176 return additionalModules.contains(new ModuleId(module.getName(), module.getRevision()));
179 //check for any dependency regarding given string
180 private boolean checkModuleDependency(final ModuleLike module, final Collection<ModuleId> rootModules) {
181 for (ModuleId rootModule : rootModules) {
182 if (rootModule.equals(new ModuleId(module.getName(), module.getRevision()))) {
186 //handling/checking imports regarding root modules
187 for (ModuleImport moduleImport : module.getImports()) {
188 if (moduleImport.getModuleName().equals(rootModule.getName())) {
189 return moduleImport.getRevision().isEmpty()
190 || moduleImport.getRevision().equals(rootModule.getRev());
194 //submodules handling
195 for (Submodule moduleSub : module.getSubmodules()) {
196 return checkModuleDependency(moduleSub, rootModules);
204 public String toString() {
205 return String.format("SchemaContextProxyImpl{filteredModules=%s}", filteredModules);
208 public static final class ModuleId {
209 private final String name;
210 private final Revision rev;
212 public ModuleId(final String name, final Optional<Revision> rev) {
213 checkArgument(!Strings.isNullOrEmpty(name), "No module dependency name given. Nothing to do.");
215 checkArgument(rev.isPresent(), "No revision date given. Nothing to do.");
216 this.rev = rev.get();
219 public String getName() {
223 public Optional<Revision> getRev() {
224 return Optional.ofNullable(rev);
227 public static final Function<Module, ModuleId> MODULE_TO_MODULE_ID = input -> new ModuleId(input.getName(),
228 input.getRevision());
231 public boolean equals(final Object obj) {
235 if (!(obj instanceof ModuleId)) {
239 ModuleId moduleId = (ModuleId) obj;
240 if (name != null ? !name.equals(moduleId.name) : moduleId.name != null) {
243 if (rev != null ? !rev.equals(moduleId.rev) : moduleId.rev != null) {
251 public int hashCode() {
252 int result = name != null ? name.hashCode() : 0;
253 result = 31 * result + (rev != null ? rev.hashCode() : 0);
258 public String toString() {
259 return String.format("ModuleId{name='%s', rev=%s}",name,rev);