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.common.YangConstants;
35 import org.opendaylight.yangtools.yang.model.api.Deviation;
36 import org.opendaylight.yangtools.yang.model.api.ModuleIdentifier;
37 import org.opendaylight.yangtools.yang.model.api.RevisionAwareXPath;
38 import org.opendaylight.yangtools.yang.model.api.Status;
39 import org.opendaylight.yangtools.yang.model.api.stmt.BelongsToStatement;
40 import org.opendaylight.yangtools.yang.model.api.stmt.ModuleStatement;
41 import org.opendaylight.yangtools.yang.model.api.stmt.RevisionStatement;
42 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier;
43 import org.opendaylight.yangtools.yang.model.api.stmt.SchemaNodeIdentifier.Relative;
44 import org.opendaylight.yangtools.yang.model.api.stmt.SubmoduleStatement;
45 import org.opendaylight.yangtools.yang.model.util.RevisionAwareXPathImpl;
46 import org.opendaylight.yangtools.yang.parser.spi.meta.QNameCacheNamespace;
47 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContext;
48 import org.opendaylight.yangtools.yang.parser.spi.meta.StmtContextUtils;
49 import org.opendaylight.yangtools.yang.parser.spi.source.BelongsToPrefixToModuleName;
50 import org.opendaylight.yangtools.yang.parser.spi.source.ImpPrefixToModuleIdentifier;
51 import org.opendaylight.yangtools.yang.parser.spi.source.ModuleCtxToModuleQName;
52 import org.opendaylight.yangtools.yang.parser.spi.source.ModuleIdentifierToModuleQName;
53 import org.opendaylight.yangtools.yang.parser.spi.source.ModuleNameToModuleQName;
54 import org.opendaylight.yangtools.yang.parser.spi.source.PrefixToModule;
55 import org.opendaylight.yangtools.yang.parser.spi.source.QNameToStatementDefinition;
56 import org.opendaylight.yangtools.yang.parser.stmt.reactor.RootStatementContext;
57 import org.opendaylight.yangtools.yang.parser.stmt.reactor.StatementContextBase;
58 import org.slf4j.Logger;
59 import org.slf4j.LoggerFactory;
61 public final class Utils {
62 private static final Logger LOG = LoggerFactory.getLogger(Utils.class);
63 private static final CharMatcher DOUBLE_QUOTE_MATCHER = CharMatcher.is('"');
64 private static final CharMatcher SINGLE_QUOTE_MATCHER = CharMatcher.is('\'');
65 private static final Splitter SLASH_SPLITTER = Splitter.on('/').omitEmptyStrings().trimResults();
66 private static final Splitter SPACE_SPLITTER = Splitter.on(' ').omitEmptyStrings().trimResults();
67 private static final Pattern PATH_ABS = Pattern.compile("/[^/].*");
69 private static final ThreadLocal<XPathFactory> XPATH_FACTORY = new ThreadLocal<XPathFactory>() {
71 protected XPathFactory initialValue() {
72 return XPathFactory.newInstance();
77 throw new UnsupportedOperationException();
81 * Cleanup any resources attached to the current thread. Threads interacting with this class can cause thread-local
82 * caches to them. Invoke this method if you want to detach those resources.
84 public static void detachFromCurrentThread() {
85 XPATH_FACTORY.remove();
88 public static Collection<SchemaNodeIdentifier.Relative> transformKeysStringToKeyNodes(final StmtContext<?, ?, ?> ctx,
90 List<String> keyTokens = SPACE_SPLITTER.splitToList(value);
92 // to detect if key contains duplicates
93 if ((new HashSet<>(keyTokens)).size() < keyTokens.size()) {
94 // FIXME: report all duplicate keys
95 throw new IllegalArgumentException();
98 Set<SchemaNodeIdentifier.Relative> keyNodes = new HashSet<>();
100 for (String keyToken : keyTokens) {
102 SchemaNodeIdentifier.Relative keyNode = (Relative) SchemaNodeIdentifier.Relative.create(false,
103 Utils.qNameFromArgument(ctx, keyToken));
104 keyNodes.add(keyNode);
110 private static String trimSingleLastSlashFromXPath(final String path) {
111 return path.endsWith("/") ? path.substring(0, path.length() - 1) : path;
114 static RevisionAwareXPath parseXPath(final StmtContext<?, ?, ?> ctx, final String path) {
115 final XPath xPath = XPATH_FACTORY.get().newXPath();
116 xPath.setNamespaceContext(StmtNamespaceContext.create(ctx));
118 final String trimmed = trimSingleLastSlashFromXPath(path);
120 // TODO: we could capture the result and expose its 'evaluate' method
121 xPath.compile(trimmed);
122 } catch (XPathExpressionException e) {
123 LOG.warn("Argument \"{}\" is not valid XPath string at \"{}\"", path, ctx.getStatementSourceReference(), e);
126 return new RevisionAwareXPathImpl(path, PATH_ABS.matcher(path).matches());
129 public static QName trimPrefix(final QName identifier) {
130 String prefixedLocalName = identifier.getLocalName();
131 String[] namesParts = prefixedLocalName.split(":");
133 if (namesParts.length == 2) {
134 String localName = namesParts[1];
135 return QName.create(identifier.getModule(), localName);
141 public static String getPrefixFromArgument(final String prefixedLocalName) {
142 String[] namesParts = prefixedLocalName.split(":");
143 if (namesParts.length == 2) {
144 return namesParts[0];
149 public static boolean isValidStatementDefinition(final PrefixToModule prefixes, final QNameToStatementDefinition stmtDef,
150 final QName identifier) {
151 if (stmtDef.get(identifier) != null) {
154 String prefixedLocalName = identifier.getLocalName();
155 String[] namesParts = prefixedLocalName.split(":");
157 if (namesParts.length == 2) {
158 String prefix = namesParts[0];
159 String localName = namesParts[1];
160 if (prefixes != null && prefixes.get(prefix) != null
161 && stmtDef.get(QName.create(YangConstants.RFC6020_YIN_MODULE, localName)) != null) {
164 if (stmtDef.get(QName.create(YangConstants.RFC6020_YIN_MODULE, localName)) != null) {
173 static SchemaNodeIdentifier nodeIdentifierFromPath(final StmtContext<?, ?, ?> ctx, final String path) {
174 // FIXME: is the path trimming really necessary??
175 final List<QName> qNames = new ArrayList<>();
176 for (String nodeName : SLASH_SPLITTER.split(trimSingleLastSlashFromXPath(path))) {
178 final QName qName = Utils.qNameFromArgument(ctx, nodeName);
180 } catch (Exception e) {
181 throw new IllegalArgumentException(
182 String.format("Failed to parse node '%s' in path '%s'", nodeName, path), e);
186 return SchemaNodeIdentifier.create(qNames, PATH_ABS.matcher(path).matches());
189 public static String stringFromStringContext(final YangStatementParser.ArgumentContext context) {
190 StringBuilder sb = new StringBuilder();
191 List<TerminalNode> strings = context.STRING();
192 if (strings.isEmpty()) {
193 strings = Arrays.asList(context.IDENTIFIER());
195 for (TerminalNode stringNode : strings) {
196 final String str = stringNode.getText();
197 char firstChar = str.charAt(0);
198 final CharMatcher quoteMatcher;
199 if (SINGLE_QUOTE_MATCHER.matches(firstChar)) {
200 quoteMatcher = SINGLE_QUOTE_MATCHER;
201 } else if (DOUBLE_QUOTE_MATCHER.matches(firstChar)) {
202 quoteMatcher = DOUBLE_QUOTE_MATCHER;
207 sb.append(quoteMatcher.removeFrom(str.substring(1, str.length() - 1)));
209 return sb.toString();
212 public static QName qNameFromArgument(StmtContext<?, ?, ?> ctx, final String value) {
213 if (Strings.isNullOrEmpty(value)) {
214 return ctx.getPublicDefinition().getStatementName();
218 QNameModule qNameModule = null;
219 String localName = null;
221 String[] namesParts = value.split(":");
222 switch (namesParts.length) {
224 localName = namesParts[0];
225 qNameModule = getRootModuleQName(ctx);
228 prefix = namesParts[0];
229 localName = namesParts[1];
230 qNameModule = getModuleQNameByPrefix(ctx, prefix);
231 // in case of unknown statement argument, we're not going to parse it
232 if (qNameModule == null
233 && ctx.getPublicDefinition().getDeclaredRepresentationClass()
234 .isAssignableFrom(UnknownStatementImpl.class)) {
236 qNameModule = getRootModuleQName(ctx);
238 if (qNameModule == null
239 && Iterables.getLast(ctx.getCopyHistory()) == StmtContext.TypeOfCopy.ADDED_BY_AUGMENTATION) {
240 ctx = ctx.getOriginalCtx();
241 qNameModule = getModuleQNameByPrefix(ctx, prefix);
246 Preconditions.checkArgument(qNameModule != null, "Error in module '%s': can not resolve QNameModule for '%s'.",
247 ctx.getRoot().rawStatementArgument(), value);
248 final QNameModule resultQNameModule;
249 if (qNameModule.getRevision() == null) {
250 resultQNameModule = QNameModule.cachedReference(
251 QNameModule.create(qNameModule.getNamespace(), SimpleDateFormatUtil.DEFAULT_DATE_REV));
253 resultQNameModule = qNameModule;
256 return ctx.getFromNamespace(QNameCacheNamespace.class, QName.create(resultQNameModule, localName));
259 public static QNameModule getModuleQNameByPrefix(final StmtContext<?, ?, ?> ctx, final String prefix) {
260 final ModuleIdentifier modId = ctx.getRoot().getFromNamespace(ImpPrefixToModuleIdentifier.class, prefix);
261 final QNameModule qNameModule = ctx.getFromNamespace(ModuleIdentifierToModuleQName.class, modId);
263 if (qNameModule == null && StmtContextUtils.producesDeclared(ctx.getRoot(), SubmoduleStatement.class)) {
264 String moduleName = ctx.getRoot().getFromNamespace(BelongsToPrefixToModuleName.class, prefix);
265 return ctx.getFromNamespace(ModuleNameToModuleQName.class, moduleName);
270 public static QNameModule getRootModuleQName(final StmtContext<?, ?, ?> ctx) {
275 final StmtContext<?, ?, ?> rootCtx = ctx.getRoot();
276 final QNameModule qNameModule;
278 if (StmtContextUtils.producesDeclared(rootCtx, ModuleStatement.class)) {
279 qNameModule = rootCtx.getFromNamespace(ModuleCtxToModuleQName.class, rootCtx);
280 } else if (StmtContextUtils.producesDeclared(rootCtx, SubmoduleStatement.class)) {
281 final String belongsToModuleName = firstAttributeOf(rootCtx.substatements(), BelongsToStatement.class);
282 qNameModule = rootCtx.getFromNamespace(ModuleNameToModuleQName.class, belongsToModuleName);
287 Preconditions.checkArgument(qNameModule != null, "Failed to look up root QNameModule for %s", ctx);
288 if (qNameModule.getRevision() != null) {
292 return QNameModule.cachedReference(
293 QNameModule.create(qNameModule.getNamespace(), SimpleDateFormatUtil.DEFAULT_DATE_REV));
297 public static StatementContextBase<?, ?, ?> findNode(final StmtContext<?, ?, ?> rootStmtCtx,
298 final SchemaNodeIdentifier node) {
299 return (StatementContextBase<?, ?, ?>) rootStmtCtx.getFromNamespace(SchemaNodeIdentifierBuildNamespace.class, node);
302 public static boolean isUnknownNode(final StmtContext<?, ?, ?> stmtCtx) {
303 return stmtCtx.getPublicDefinition().getDeclaredRepresentationClass()
304 .isAssignableFrom(UnknownStatementImpl.class);
307 public static Deviation.Deviate parseDeviateFromString(final String deviate) {
309 // Yang constants should be lowercase so we have throw if value does not
311 String deviateUpper = deviate.toUpperCase();
312 Preconditions.checkArgument(!Objects.equals(deviate, deviateUpper),
313 "String %s is not valid deviate argument", deviate);
315 // but Java enum is uppercase so we cannot use lowercase here
317 return Deviation.Deviate.valueOf(deviateUpper);
318 } catch (IllegalArgumentException e) {
319 throw new IllegalArgumentException(String.format("String %s is not valid deviate argument", deviate), e);
323 public static Status parseStatus(final String value) {
325 Status status = null;
328 status = Status.CURRENT;
331 status = Status.DEPRECATED;
334 status = Status.OBSOLETE;
337 LOG.warn("Invalid 'status' statement: " + value);
343 public static Date getLatestRevision(final RootStatementContext<?, ?, ?> root) {
344 return getLatestRevision(root.declaredSubstatements());
347 public static Date getLatestRevision(final Iterable<? extends StmtContext<?, ?, ?>> subStmts) {
348 Date revision = null;
349 for (StmtContext<?, ?, ?> subStmt : subStmts) {
350 if (subStmt.getPublicDefinition().getDeclaredRepresentationClass().isAssignableFrom(RevisionStatement
352 if (revision == null && subStmt.getStatementArgument() != null) {
353 revision = (Date) subStmt.getStatementArgument();
354 } else if (subStmt.getStatementArgument() != null && ((Date) subStmt.getStatementArgument()).compareTo
356 revision = (Date) subStmt.getStatementArgument();
363 public static boolean isModuleIdentifierWithoutSpecifiedRevision(final Object o) {
364 return (o instanceof ModuleIdentifier)
365 && (((ModuleIdentifier) o).getRevision() == SimpleDateFormatUtil.DEFAULT_DATE_IMP ||
366 ((ModuleIdentifier) o).getRevision() == SimpleDateFormatUtil.DEFAULT_BELONGS_TO_DATE);