2 * Copyright (c) 2016 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.restconf.nb.rfc8040.utils.parser;
10 import static com.google.common.base.Preconditions.checkState;
11 import static com.google.common.base.Verify.verifyNotNull;
13 import com.google.common.annotations.VisibleForTesting;
14 import com.google.common.base.Splitter;
15 import com.google.common.collect.Iterables;
16 import java.time.format.DateTimeParseException;
17 import java.util.AbstractMap.SimpleImmutableEntry;
18 import java.util.Date;
19 import java.util.Iterator;
20 import java.util.List;
21 import java.util.Locale;
22 import java.util.Map.Entry;
23 import java.util.Optional;
24 import org.eclipse.jdt.annotation.Nullable;
25 import org.opendaylight.mdsal.dom.api.DOMMountPoint;
26 import org.opendaylight.mdsal.dom.api.DOMMountPointService;
27 import org.opendaylight.mdsal.dom.api.DOMSchemaService;
28 import org.opendaylight.mdsal.dom.api.DOMYangTextSourceProvider;
29 import org.opendaylight.restconf.common.context.InstanceIdentifierContext;
30 import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
31 import org.opendaylight.restconf.common.errors.RestconfError.ErrorTag;
32 import org.opendaylight.restconf.common.schema.SchemaExportContext;
33 import org.opendaylight.restconf.nb.rfc8040.utils.RestconfConstants;
34 import org.opendaylight.yangtools.yang.common.ErrorType;
35 import org.opendaylight.yangtools.yang.common.QName;
36 import org.opendaylight.yangtools.yang.common.Revision;
37 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
38 import org.opendaylight.yangtools.yang.data.util.DataSchemaContextNode;
39 import org.opendaylight.yangtools.yang.data.util.DataSchemaContextTree;
40 import org.opendaylight.yangtools.yang.model.api.ActionDefinition;
41 import org.opendaylight.yangtools.yang.model.api.ActionNodeContainer;
42 import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
43 import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
44 import org.opendaylight.yangtools.yang.model.api.Module;
45 import org.opendaylight.yangtools.yang.model.api.RpcDefinition;
46 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
47 import org.opendaylight.yangtools.yang.model.api.SchemaNode;
48 import org.slf4j.Logger;
49 import org.slf4j.LoggerFactory;
52 * Util class for parsing identifier.
54 public final class ParserIdentifier {
55 private static final Logger LOG = LoggerFactory.getLogger(ParserIdentifier.class);
56 private static final Splitter MP_SPLITTER = Splitter.on("/" + RestconfConstants.MOUNT);
58 private ParserIdentifier() {
63 * Make {@link InstanceIdentifierContext} from {@link String} identifier
65 * For identifiers of data NOT behind mount points returned
66 * {@link InstanceIdentifierContext} is prepared with {@code null} reference of {@link DOMMountPoint} and with
67 * controller's {@link SchemaContext}.
69 * For identifiers of data behind mount points returned
70 * {@link InstanceIdentifierContext} is prepared with reference of {@link DOMMountPoint} and its
71 * own {@link SchemaContext}.
75 * @param schemaContext
76 * - controller schema context
77 * @param mountPointService
78 * - mount point service
79 * @return {@link InstanceIdentifierContext}
81 public static InstanceIdentifierContext<?> toInstanceIdentifier(final String identifier,
82 final EffectiveModelContext schemaContext, final Optional<DOMMountPointService> mountPointService) {
83 if (identifier == null || !identifier.contains(RestconfConstants.MOUNT)) {
84 return createIIdContext(schemaContext, identifier, null);
86 if (mountPointService.isEmpty()) {
87 throw new RestconfDocumentedException("Mount point service is not available");
90 final Iterator<String> pathsIt = MP_SPLITTER.split(identifier).iterator();
91 final String mountPointId = pathsIt.next();
92 final YangInstanceIdentifier mountPath = IdentifierCodec.deserialize(mountPointId, schemaContext);
93 final DOMMountPoint mountPoint = mountPointService.get().getMountPoint(mountPath)
94 .orElseThrow(() -> new RestconfDocumentedException("Mount point does not exist.",
95 ErrorType.PROTOCOL, ErrorTag.RESOURCE_DENIED_TRANSPORT));
97 final EffectiveModelContext mountSchemaContext = coerceModelContext(mountPoint);
98 final String pathId = pathsIt.next().replaceFirst("/", "");
99 return createIIdContext(mountSchemaContext, pathId, mountPoint);
103 * Method to create {@link InstanceIdentifierContext} from {@link YangInstanceIdentifier}
104 * and {@link SchemaContext}, {@link DOMMountPoint}.
106 * @param url Invocation URL
107 * @param schemaContext SchemaContext in which the path is to be interpreted in
108 * @param mountPoint A mount point handle, if the URL is being interpreted relative to a mount point
109 * @return {@link InstanceIdentifierContext}
110 * @throws RestconfDocumentedException if the path cannot be resolved
112 private static InstanceIdentifierContext<?> createIIdContext(final EffectiveModelContext schemaContext,
113 final String url, final @Nullable DOMMountPoint mountPoint) {
114 final YangInstanceIdentifier urlPath = IdentifierCodec.deserialize(url, schemaContext);
115 return new InstanceIdentifierContext<>(urlPath, getPathSchema(schemaContext, urlPath), mountPoint,
119 private static SchemaNode getPathSchema(final EffectiveModelContext schemaContext,
120 final YangInstanceIdentifier urlPath) {
121 // First things first: an empty path means data invocation on SchemaContext
122 if (urlPath.isEmpty()) {
123 return schemaContext;
126 // Peel the last component and locate the parent data node, empty path resolves to SchemaContext
127 final DataSchemaContextNode<?> parent = DataSchemaContextTree.from(schemaContext)
128 .findChild(verifyNotNull(urlPath.getParent()))
130 // Parent data node is not present, this is not a valid location.
131 () -> new RestconfDocumentedException("Parent of " + urlPath + " not found",
132 ErrorType.PROTOCOL, ErrorTag.INVALID_VALUE));
134 // Now try to resolve the last component as a data item...
135 final DataSchemaContextNode<?> data = parent.getChild(urlPath.getLastPathArgument());
137 return data.getDataSchemaNode();
140 // ... otherwise this has to be an operation invocation. RPCs cannot be defined anywhere but schema root,
141 // actions can reside everywhere else (and SchemaContext reports them empty)
142 final QName qname = urlPath.getLastPathArgument().getNodeType();
143 final DataSchemaNode parentSchema = parent.getDataSchemaNode();
144 if (parentSchema instanceof SchemaContext) {
145 for (final RpcDefinition rpc : ((SchemaContext) parentSchema).getOperations()) {
146 if (qname.equals(rpc.getQName())) {
151 if (parentSchema instanceof ActionNodeContainer) {
152 for (final ActionDefinition action : ((ActionNodeContainer) parentSchema).getActions()) {
153 if (qname.equals(action.getQName())) {
159 // No luck: even if we found the parent, we did not locate a data, nor RPC, nor action node, hence the URL
161 throw new RestconfDocumentedException("Context for " + urlPath + " not found", ErrorType.PROTOCOL,
162 ErrorTag.INVALID_VALUE);
166 * Make {@link String} from {@link YangInstanceIdentifier}.
168 * @param instanceIdentifier Instance identifier
169 * @param schemaContext Schema context
170 * @return Yang instance identifier serialized to String
172 public static String stringFromYangInstanceIdentifier(final YangInstanceIdentifier instanceIdentifier,
173 final EffectiveModelContext schemaContext) {
174 return IdentifierCodec.serialize(instanceIdentifier, schemaContext);
178 * Make a moduleName/Revision pair from identifier.
182 * @return {@link QName}
184 public static Entry<String, Revision> makeQNameFromIdentifier(final String identifier) {
185 // check if more than one slash is not used as path separator
186 if (identifier.contains("//")) {
187 LOG.debug("URI has bad format. It should be \'moduleName/yyyy-MM-dd\' {}", identifier);
188 throw new RestconfDocumentedException(
189 "URI has bad format. End of URI should be in format \'moduleName/yyyy-MM-dd\'", ErrorType.PROTOCOL,
190 ErrorTag.INVALID_VALUE);
193 final int mountIndex = identifier.indexOf(RestconfConstants.MOUNT);
194 final String moduleNameAndRevision;
195 if (mountIndex >= 0) {
196 moduleNameAndRevision = identifier.substring(mountIndex + RestconfConstants.MOUNT.length())
197 .replaceFirst("/", "");
199 moduleNameAndRevision = identifier;
202 final List<String> pathArgs = RestconfConstants.SLASH_SPLITTER.splitToList(moduleNameAndRevision);
203 if (pathArgs.size() != 2) {
204 LOG.debug("URI has bad format '{}'. It should be 'moduleName/yyyy-MM-dd'", identifier);
205 throw new RestconfDocumentedException(
206 "URI has bad format. End of URI should be in format \'moduleName/yyyy-MM-dd\'", ErrorType.PROTOCOL,
207 ErrorTag.INVALID_VALUE);
210 final Revision moduleRevision;
212 moduleRevision = Revision.of(pathArgs.get(1));
213 } catch (final DateTimeParseException e) {
214 LOG.debug("URI has bad format: '{}'. It should be 'moduleName/yyyy-MM-dd'", identifier);
215 throw new RestconfDocumentedException("URI has bad format. It should be \'moduleName/yyyy-MM-dd\'",
216 ErrorType.PROTOCOL, ErrorTag.INVALID_VALUE, e);
219 return new SimpleImmutableEntry<>(pathArgs.get(0), moduleRevision);
223 * Parsing {@link Module} module by {@link String} module name and
224 * {@link Date} revision and from the parsed module create
225 * {@link SchemaExportContext}.
227 * @param schemaContext
228 * {@link EffectiveModelContext}
231 * @param domMountPointService
232 * {@link DOMMountPointService}
233 * @return {@link SchemaExportContext}
235 public static SchemaExportContext toSchemaExportContextFromIdentifier(final EffectiveModelContext schemaContext,
236 final String identifier, final DOMMountPointService domMountPointService,
237 final DOMYangTextSourceProvider sourceProvider) {
238 final Iterable<String> pathComponents = RestconfConstants.SLASH_SPLITTER.split(identifier);
239 final Iterator<String> componentIter = pathComponents.iterator();
240 if (!Iterables.contains(pathComponents, RestconfConstants.MOUNT)) {
241 final String moduleName = validateAndGetModulName(componentIter);
242 final Revision revision = validateAndGetRevision(componentIter);
243 final Module module = schemaContext.findModule(moduleName, revision).orElse(null);
244 return new SchemaExportContext(schemaContext, module, sourceProvider);
246 final StringBuilder pathBuilder = new StringBuilder();
247 while (componentIter.hasNext()) {
248 final String current = componentIter.next();
250 if (RestconfConstants.MOUNT.equals(current)) {
251 pathBuilder.append('/').append(RestconfConstants.MOUNT);
255 if (pathBuilder.length() != 0) {
256 pathBuilder.append('/');
259 pathBuilder.append(current);
261 final InstanceIdentifierContext<?> point = toInstanceIdentifier(pathBuilder.toString(), schemaContext,
262 Optional.of(domMountPointService));
263 final String moduleName = validateAndGetModulName(componentIter);
264 final Revision revision = validateAndGetRevision(componentIter);
265 final EffectiveModelContext context = coerceModelContext(point.getMountPoint());
266 final Module module = context.findModule(moduleName, revision).orElse(null);
267 return new SchemaExportContext(context, module, sourceProvider);
271 public static YangInstanceIdentifier parserPatchTarget(final InstanceIdentifierContext<?> context,
272 final String target) {
273 final var schemaContext = context.getSchemaContext();
274 final var urlPath = context.getInstanceIdentifier();
275 final String targetUrl;
276 if (urlPath.isEmpty()) {
277 targetUrl = target.startsWith("/") ? target.substring(1) : target;
279 targetUrl = stringFromYangInstanceIdentifier(urlPath, schemaContext) + target;
282 return toInstanceIdentifier(targetUrl, schemaContext, Optional.empty()).getInstanceIdentifier();
286 * Validation and parsing of revision.
288 * @param revisionDate iterator
292 static Revision validateAndGetRevision(final Iterator<String> revisionDate) {
293 RestconfDocumentedException.throwIf(!revisionDate.hasNext(), "Revision date must be supplied.",
294 ErrorType.PROTOCOL, ErrorTag.INVALID_VALUE);
296 return Revision.of(revisionDate.next());
297 } catch (final DateTimeParseException e) {
298 throw new RestconfDocumentedException("Supplied revision is not in expected date format YYYY-mm-dd", e);
303 * Validation of name.
305 * @param moduleName iterator
306 * @return {@link String}
309 static String validateAndGetModulName(final Iterator<String> moduleName) {
310 RestconfDocumentedException.throwIf(!moduleName.hasNext(), "Module name must be supplied.", ErrorType.PROTOCOL,
311 ErrorTag.INVALID_VALUE);
312 final String name = moduleName.next();
314 RestconfDocumentedException.throwIf(
315 name.isEmpty() || !ParserConstants.YANG_IDENTIFIER_START.matches(name.charAt(0)),
316 "Identifier must start with character from set 'a-zA-Z_", ErrorType.PROTOCOL, ErrorTag.INVALID_VALUE);
317 RestconfDocumentedException.throwIf(name.toUpperCase(Locale.ROOT).startsWith("XML"),
318 "Identifier must NOT start with XML ignore case.", ErrorType.PROTOCOL, ErrorTag.INVALID_VALUE);
319 RestconfDocumentedException.throwIf(
320 !ParserConstants.YANG_IDENTIFIER_PART.matchesAllOf(name.substring(1)),
321 "Supplied name has not expected identifier format.", ErrorType.PROTOCOL, ErrorTag.INVALID_VALUE);
326 private static EffectiveModelContext coerceModelContext(final DOMMountPoint mountPoint) {
327 final EffectiveModelContext context = modelContext(mountPoint);
328 checkState(context != null, "Mount point %s does not have a model context", mountPoint);
332 private static EffectiveModelContext modelContext(final DOMMountPoint mountPoint) {
333 return mountPoint.getService(DOMSchemaService.class)
334 .flatMap(svc -> Optional.ofNullable(svc.getGlobalContext()))