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.parser.stmt.rfc6020;
10 import static org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils.firstAttributeOf;
11 import com.google.common.base.CharMatcher;
12 import com.google.common.base.Preconditions;
13 import com.google.common.base.Splitter;
14 import com.google.common.base.Strings;
15 import com.google.common.collect.Iterables;
16 import java.util.ArrayList;
17 import java.util.Arrays;
18 import java.util.Collection;
19 import java.util.Date;
20 import java.util.HashSet;
21 import java.util.List;
22 import java.util.Objects;
24 import java.util.regex.Pattern;
25 import javax.annotation.Nullable;
26 import javax.xml.xpath.XPath;
27 import javax.xml.xpath.XPathExpressionException;
28 import javax.xml.xpath.XPathFactory;
29 import org.antlr.v4.runtime.tree.TerminalNode;
30 import org.opendaylight.yangtools.antlrv4.code.gen.YangStatementParser;
31 import org.opendaylight.yangtools.yang.common.QName;
32 import org.opendaylight.yangtools.yang.common.QNameModule;
33 import org.opendaylight.yangtools.yang.common.SimpleDateFormatUtil;
34 import org.opendaylight.yangtools.yang.model.api.Deviation;
35 import org.opendaylight.yangtools.yang.model.api.ModuleIdentifier;
36 import org.opendaylight.yangtools.yang.model.api.RevisionAwareXPath;
37 import org.opendaylight.yangtools.yang.model.api.Status;
38 import org.opendaylight.yangtools.yang.model.api.stmt.BelongsToStatement;
39 import org.opendaylight.yangtools.yang.model.api.stmt.ModuleStatement;
40 import org.opendaylight.yangtools.yang.model.api.stmt.RevisionStatement;
41 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier;
42 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Relative;
43 import org.opendaylight.yangtools.yang.model.api.stmt.SubmoduleStatement;
44 import org.opendaylight.yangtools.yang.model.util.RevisionAwareXPathImpl;
45 import org.opendaylight.yangtools.yang.parser.spi.meta.QNameCacheNamespace;
46 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
47 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
48 import org.opendaylight.yangtools.yang.parser.spi.source.BelongsToPrefixToModuleName;
49 import org.opendaylight.yangtools.yang.parser.spi.source.ImpPrefixToModuleIdentifier;
50 import org.opendaylight.yangtools.yang.parser.spi.source.ModuleCtxToModuleQName;
51 import org.opendaylight.yangtools.yang.parser.spi.source.ModuleIdentifierToModuleQName;
52 import org.opendaylight.yangtools.yang.parser.spi.source.ModuleNameToModuleQName;
53 import org.opendaylight.yangtools.yang.parser.spi.source.PrefixToModule;
54 import org.opendaylight.yangtools.yang.parser.spi.source.QNameToStatementDefinition;
55 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase;
56 import org.slf4j.Logger;
57 import org.slf4j.LoggerFactory;
59 public final class Utils {
60 private static final Logger LOG = LoggerFactory.getLogger(Utils.class);
61 private static final CharMatcher DOUBLE_QUOTE_MATCHER = CharMatcher.is('"');
62 private static final CharMatcher SINGLE_QUOTE_MATCHER = CharMatcher.is('\'');
63 private static final Splitter SLASH_SPLITTER = Splitter.on('/').omitEmptyStrings().trimResults();
64 private static final Splitter SPACE_SPLITTER = Splitter.on(' ').omitEmptyStrings().trimResults();
65 private static final Pattern PATH_ABS = Pattern.compile("/[^/].*");
67 private static final ThreadLocal<XPathFactory> XPATH_FACTORY = new ThreadLocal<XPathFactory>() {
69 protected XPathFactory initialValue() {
70 return XPathFactory.newInstance();
75 throw new UnsupportedOperationException();
79 * Cleanup any resources attached to the current thread. Threads interacting with this class can cause thread-local
80 * caches to them. Invoke this method if you want to detach those resources.
82 public static void detachFromCurrentThread() {
83 XPATH_FACTORY.remove();
86 public static Collection<SchemaNodeIdentifier.Relative> transformKeysStringToKeyNodes(final StmtContext<?, ?, ?> ctx,
88 List<String> keyTokens = SPACE_SPLITTER.splitToList(value);
90 // to detect if key contains duplicates
91 if ((new HashSet<>(keyTokens)).size() < keyTokens.size()) {
92 // FIXME: report all duplicate keys
93 throw new IllegalArgumentException();
96 Set<SchemaNodeIdentifier.Relative> keyNodes = new HashSet<>();
98 for (String keyToken : keyTokens) {
100 SchemaNodeIdentifier.Relative keyNode = (Relative) SchemaNodeIdentifier.Relative.create(false,
101 Utils.qNameFromArgument(ctx, keyToken));
102 keyNodes.add(keyNode);
108 private static String trimSingleLastSlashFromXPath(final String path) {
109 return path.endsWith("/") ? path.substring(0, path.length() - 1) : path;
112 static RevisionAwareXPath parseXPath(final StmtContext<?, ?, ?> ctx, final String path) {
113 final XPath xPath = XPATH_FACTORY.get().newXPath();
114 xPath.setNamespaceContext(StmtNamespaceContext.create(ctx));
116 final String trimmed = trimSingleLastSlashFromXPath(path);
118 // TODO: we could capture the result and expose its 'evaluate' method
119 xPath.compile(trimmed);
120 } catch (XPathExpressionException e) {
121 LOG.warn("Argument \"{}\" is not valid XPath string at \"{}\"", path, ctx.getStatementSourceReference(), e);
124 return new RevisionAwareXPathImpl(path, PATH_ABS.matcher(path).matches());
127 public static QName trimPrefix(final QName identifier) {
128 String prefixedLocalName = identifier.getLocalName();
129 String[] namesParts = prefixedLocalName.split(":");
131 if (namesParts.length == 2) {
132 String localName = namesParts[1];
133 return QName.create(identifier.getModule(), localName);
141 * Based on identifier read from source and collections of relevant prefixes and statement definitions mappings
142 * provided for actual phase, method resolves and returns valid QName for declared statement to be written.
143 * This applies to any declared statement, including unknown statements.
145 * @param prefixes - collection of all relevant prefix mappings supplied for actual parsing phase
146 * @param stmtDef - collection of all relevant statement definition mappings provided for actual parsing phase
147 * @param identifier - statement to parse from source
148 * @return valid QName for declared statement to be written
151 public static QName getValidStatementDefinition(final PrefixToModule prefixes, final QNameToStatementDefinition
152 stmtDef, final QName identifier) {
153 if (stmtDef.get(identifier) != null) {
154 return stmtDef.get(identifier).getStatementName();
156 String prefixedLocalName = identifier.getLocalName();
157 String[] namesParts = prefixedLocalName.split(":");
159 if (namesParts.length == 2) {
160 String prefix = namesParts[0];
161 String localName = namesParts[1];
162 if (prefixes != null && prefixes.get(prefix) != null
163 && stmtDef.get(QName.create(prefixes.get(prefix), localName)) != null) {
164 return QName.create(prefixes.get(prefix), localName);
171 static SchemaNodeIdentifier nodeIdentifierFromPath(final StmtContext<?, ?, ?> ctx, final String path) {
172 // FIXME: is the path trimming really necessary??
173 final List<QName> qNames = new ArrayList<>();
174 for (String nodeName : SLASH_SPLITTER.split(trimSingleLastSlashFromXPath(path))) {
176 final QName qName = Utils.qNameFromArgument(ctx, nodeName);
178 } catch (Exception e) {
179 throw new IllegalArgumentException(
180 String.format("Failed to parse node '%s' in path '%s'", nodeName, path), e);
184 return SchemaNodeIdentifier.create(qNames, PATH_ABS.matcher(path).matches());
187 public static String stringFromStringContext(final YangStatementParser.ArgumentContext context) {
188 StringBuilder sb = new StringBuilder();
189 List<TerminalNode> strings = context.STRING();
190 if (strings.isEmpty()) {
191 strings = Arrays.asList(context.IDENTIFIER());
193 for (TerminalNode stringNode : strings) {
194 final String str = stringNode.getText();
195 char firstChar = str.charAt(0);
196 final CharMatcher quoteMatcher;
197 if (SINGLE_QUOTE_MATCHER.matches(firstChar)) {
198 quoteMatcher = SINGLE_QUOTE_MATCHER;
199 } else if (DOUBLE_QUOTE_MATCHER.matches(firstChar)) {
200 quoteMatcher = DOUBLE_QUOTE_MATCHER;
205 sb.append(quoteMatcher.removeFrom(str.substring(1, str.length() - 1)));
207 return sb.toString();
210 public static QName qNameFromArgument(StmtContext<?, ?, ?> ctx, final String value) {
211 if (Strings.isNullOrEmpty(value)) {
212 return ctx.getPublicDefinition().getStatementName();
216 QNameModule qNameModule = null;
217 String localName = null;
219 String[] namesParts = value.split(":");
220 switch (namesParts.length) {
222 localName = namesParts[0];
223 qNameModule = getRootModuleQName(ctx);
226 prefix = namesParts[0];
227 localName = namesParts[1];
228 qNameModule = getModuleQNameByPrefix(ctx, prefix);
229 // in case of unknown statement argument, we're not going to parse it
230 if (qNameModule == null
231 && ctx.getPublicDefinition().getDeclaredRepresentationClass()
232 .isAssignableFrom(UnknownStatementImpl.class)) {
234 qNameModule = getRootModuleQName(ctx);
236 if (qNameModule == null
237 && Iterables.getLast(ctx.getCopyHistory()) == StmtContext.TypeOfCopy.ADDED_BY_AUGMENTATION) {
238 ctx = ctx.getOriginalCtx();
239 qNameModule = getModuleQNameByPrefix(ctx, prefix);
244 Preconditions.checkArgument(qNameModule != null, "Error in module '%s': can not resolve QNameModule for '%s'.",
245 ctx.getRoot().rawStatementArgument(), value);
246 final QNameModule resultQNameModule;
247 if (qNameModule.getRevision() == null) {
248 resultQNameModule = QNameModule.create(qNameModule.getNamespace(), SimpleDateFormatUtil.DEFAULT_DATE_REV)
251 resultQNameModule = qNameModule;
254 return ctx.getFromNamespace(QNameCacheNamespace.class, QName.create(resultQNameModule, localName));
257 public static QNameModule getModuleQNameByPrefix(final StmtContext<?, ?, ?> ctx, final String prefix) {
258 final ModuleIdentifier modId = ctx.getRoot().getFromNamespace(ImpPrefixToModuleIdentifier.class, prefix);
259 final QNameModule qNameModule = ctx.getFromNamespace(ModuleIdentifierToModuleQName.class, modId);
261 if (qNameModule == null && StmtContextUtils.producesDeclared(ctx.getRoot(), SubmoduleStatement.class)) {
262 String moduleName = ctx.getRoot().getFromNamespace(BelongsToPrefixToModuleName.class, prefix);
263 return ctx.getFromNamespace(ModuleNameToModuleQName.class, moduleName);
268 public static QNameModule getRootModuleQName(final StmtContext<?, ?, ?> ctx) {
273 final StmtContext<?, ?, ?> rootCtx = ctx.getRoot();
274 final QNameModule qNameModule;
276 if (StmtContextUtils.producesDeclared(rootCtx, ModuleStatement.class)) {
277 qNameModule = rootCtx.getFromNamespace(ModuleCtxToModuleQName.class, rootCtx);
278 } else if (StmtContextUtils.producesDeclared(rootCtx, SubmoduleStatement.class)) {
279 final String belongsToModuleName = firstAttributeOf(rootCtx.substatements(), BelongsToStatement.class);
280 qNameModule = rootCtx.getFromNamespace(ModuleNameToModuleQName.class, belongsToModuleName);
285 Preconditions.checkArgument(qNameModule != null, "Failed to look up root QNameModule for %s", ctx);
286 if (qNameModule.getRevision() != null) {
290 return QNameModule.create(qNameModule.getNamespace(), SimpleDateFormatUtil.DEFAULT_DATE_REV).intern();
294 public static StatementContextBase<?, ?, ?> findNode(final StmtContext<?, ?, ?> rootStmtCtx,
295 final SchemaNodeIdentifier node) {
296 return (StatementContextBase<?, ?, ?>) rootStmtCtx.getFromNamespace(SchemaNodeIdentifierBuildNamespace.class, node);
299 public static boolean isUnknownNode(final StmtContext<?, ?, ?> stmtCtx) {
300 return stmtCtx.getPublicDefinition().getDeclaredRepresentationClass()
301 .isAssignableFrom(UnknownStatementImpl.class);
304 public static Deviation.Deviate parseDeviateFromString(final String deviate) {
306 // Yang constants should be lowercase so we have throw if value does not
308 String deviateUpper = deviate.toUpperCase();
309 Preconditions.checkArgument(!Objects.equals(deviate, deviateUpper),
310 "String %s is not valid deviate argument", deviate);
312 // but Java enum is uppercase so we cannot use lowercase here
314 return Deviation.Deviate.valueOf(deviateUpper);
315 } catch (IllegalArgumentException e) {
316 throw new IllegalArgumentException(String.format("String %s is not valid deviate argument", deviate), e);
320 public static Status parseStatus(final String value) {
323 return Status.CURRENT;
325 return Status.DEPRECATED;
327 return Status.OBSOLETE;
329 LOG.warn("Invalid 'status' statement: {}", value);
334 public static Date getLatestRevision(final Iterable<? extends StmtContext<?, ?, ?>> subStmts) {
335 Date revision = null;
336 for (StmtContext<?, ?, ?> subStmt : subStmts) {
337 if (subStmt.getPublicDefinition().getDeclaredRepresentationClass().isAssignableFrom(RevisionStatement
339 if (revision == null && subStmt.getStatementArgument() != null) {
340 revision = (Date) subStmt.getStatementArgument();
341 } else if (subStmt.getStatementArgument() != null && ((Date) subStmt.getStatementArgument()).compareTo
343 revision = (Date) subStmt.getStatementArgument();
350 public static boolean isModuleIdentifierWithoutSpecifiedRevision(final Object o) {
351 return (o instanceof ModuleIdentifier)
352 && (((ModuleIdentifier) o).getRevision() == SimpleDateFormatUtil.DEFAULT_DATE_IMP ||
353 ((ModuleIdentifier) o).getRevision() == SimpleDateFormatUtil.DEFAULT_BELONGS_TO_DATE);