2 * Copyright (c) 2013 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.yang2sources.plugin;
10 import static com.google.common.base.Preconditions.checkArgument;
11 import static com.google.common.base.Preconditions.checkState;
12 import static java.util.Objects.requireNonNull;
14 import com.google.common.annotations.VisibleForTesting;
15 import com.google.common.base.Throwables;
16 import com.google.common.collect.ImmutableList;
17 import com.google.common.collect.ImmutableSet;
18 import com.google.common.io.CharStreams;
20 import java.io.IOException;
21 import java.io.Reader;
22 import java.nio.charset.StandardCharsets;
23 import java.nio.file.Files;
24 import java.nio.file.Path;
25 import java.util.AbstractMap.SimpleImmutableEntry;
26 import java.util.ArrayList;
27 import java.util.Collection;
28 import java.util.Comparator;
29 import java.util.HashMap;
30 import java.util.Iterator;
31 import java.util.List;
33 import java.util.Map.Entry;
34 import java.util.Optional;
35 import java.util.ServiceLoader;
37 import java.util.stream.Collectors;
38 import org.apache.maven.plugin.MojoExecutionException;
39 import org.apache.maven.plugin.MojoFailureException;
40 import org.apache.maven.project.MavenProject;
41 import org.opendaylight.yangtools.yang.common.YangConstants;
42 import org.opendaylight.yangtools.yang.model.parser.api.YangParser;
43 import org.opendaylight.yangtools.yang.model.parser.api.YangParserException;
44 import org.opendaylight.yangtools.yang.model.parser.api.YangParserFactory;
45 import org.opendaylight.yangtools.yang.model.repo.api.StatementParserMode;
46 import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
47 import org.opendaylight.yangtools.yang.parser.rfc7950.repo.ASTSchemaSource;
48 import org.opendaylight.yangtools.yang.parser.rfc7950.repo.TextToASTTransformer;
49 import org.opendaylight.yangtools.yang2sources.plugin.ConfigArg.CodeGeneratorArg;
50 import org.opendaylight.yangtools.yang2sources.spi.BasicCodeGenerator;
51 import org.opendaylight.yangtools.yang2sources.spi.BasicCodeGenerator.ImportResolutionMode;
52 import org.opendaylight.yangtools.yang2sources.spi.BuildContextAware;
53 import org.opendaylight.yangtools.yang2sources.spi.MavenProjectAware;
54 import org.slf4j.Logger;
55 import org.slf4j.LoggerFactory;
56 import org.sonatype.plexus.build.incremental.BuildContext;
57 import org.sonatype.plexus.build.incremental.DefaultBuildContext;
59 class YangToSourcesProcessor {
60 private static final Logger LOG = LoggerFactory.getLogger(YangToSourcesProcessor.class);
61 private static final YangParserFactory DEFAULT_PARSER_FACTORY;
64 final Iterator<YangParserFactory> it = ServiceLoader.load(YangParserFactory.class).iterator();
65 checkState(it.hasNext(), "Failed to find a YangParserFactory implementation");
66 DEFAULT_PARSER_FACTORY = it.next();
69 static final String LOG_PREFIX = "yang-to-sources:";
70 private static final String META_INF_STR = "META-INF";
71 private static final String YANG_STR = "yang";
73 static final String META_INF_YANG_STRING = META_INF_STR + File.separator + YANG_STR;
74 static final String META_INF_YANG_STRING_JAR = META_INF_STR + "/" + YANG_STR;
75 static final String META_INF_YANG_SERVICES_STRING_JAR = META_INF_STR + "/" + "services";
77 private final YangParserFactory parserFactory;
78 private final File yangFilesRootDir;
79 private final Set<File> excludedFiles;
80 private final List<CodeGeneratorArg> codeGeneratorArgs;
81 private final MavenProject project;
82 private final boolean inspectDependencies;
83 private final BuildContext buildContext;
84 private final YangProvider yangProvider;
86 private YangToSourcesProcessor(final BuildContext buildContext, final File yangFilesRootDir,
87 final Collection<File> excludedFiles, final List<CodeGeneratorArg> codeGenerators,
88 final MavenProject project, final boolean inspectDependencies, final YangProvider yangProvider) {
89 this.buildContext = requireNonNull(buildContext, "buildContext");
90 this.yangFilesRootDir = requireNonNull(yangFilesRootDir, "yangFilesRootDir");
91 this.excludedFiles = ImmutableSet.copyOf(excludedFiles);
92 this.codeGeneratorArgs = ImmutableList.copyOf(codeGenerators);
93 this.project = requireNonNull(project);
94 this.inspectDependencies = inspectDependencies;
95 this.yangProvider = requireNonNull(yangProvider);
96 this.parserFactory = DEFAULT_PARSER_FACTORY;
100 YangToSourcesProcessor(final File yangFilesRootDir, final Collection<File> excludedFiles,
101 final List<CodeGeneratorArg> codeGenerators, final MavenProject project, final boolean inspectDependencies,
102 final YangProvider yangProvider) {
103 this(new DefaultBuildContext(), yangFilesRootDir, excludedFiles, codeGenerators, project,
104 inspectDependencies, yangProvider);
107 YangToSourcesProcessor(final BuildContext buildContext, final File yangFilesRootDir,
108 final Collection<File> excludedFiles, final List<CodeGeneratorArg> codeGenerators,
109 final MavenProject project, final boolean inspectDependencies) {
110 this(yangFilesRootDir, excludedFiles, codeGenerators, project, inspectDependencies, YangProvider.getInstance());
113 public void execute() throws MojoExecutionException, MojoFailureException {
114 conditionalExecute(false);
117 void conditionalExecute(final boolean skip) throws MojoExecutionException, MojoFailureException {
119 * Collect all files which affect YANG context. This includes all
120 * files in current project and optionally any jars/files in the
123 final List<File> yangFilesInProject;
125 yangFilesInProject = listFiles(yangFilesRootDir, excludedFiles);
126 } catch (IOException e) {
127 throw new MojoFailureException("Failed to list project files", e);
130 if (yangFilesInProject.isEmpty()) {
131 // No files to process, skip.
132 LOG.info("{} No input files found", LOG_PREFIX);
136 // We need to instantiate all code generators to determine required import resolution mode
137 final List<Entry<CodeGeneratorArg, BasicCodeGenerator>> codeGenerators = instantiateGenerators();
138 final StatementParserMode importMode = determineRequiredImportMode(codeGenerators);
139 final Optional<ProcessorModuleReactor> optReactor = createReactor(importMode, yangFilesInProject);
140 if (!optReactor.isPresent()) {
144 final ProcessorModuleReactor reactor = optReactor.get();
146 final ContextHolder holder;
149 holder = createContextHolder(reactor);
150 } catch (YangParserException e) {
151 throw new MojoFailureException("Failed to process reactor " + reactor, e);
152 } catch (IOException e) {
153 throw new MojoExecutionException("Failed to read reactor " + reactor, e);
156 generateSources(holder, codeGenerators);
158 LOG.info("Skipping YANG code generation because property yang.skip is true");
162 final Collection<YangTextSchemaSource> models = reactor.getModelsInProject();
164 yangProvider.addYangsToMetaInf(project, models);
165 } catch (IOException e) {
166 throw new MojoExecutionException("Failed write model files for " + models, e);
169 // add META_INF/services
170 File generatedServicesDir = new GeneratedDirectories(project).getYangServicesDir();
171 YangProvider.setResource(generatedServicesDir, project);
172 LOG.debug("{} Yang services files from: {} marked as resources: {}", LOG_PREFIX, generatedServicesDir,
173 META_INF_YANG_SERVICES_STRING_JAR);
176 private static StatementParserMode determineRequiredImportMode(
177 final Collection<Entry<CodeGeneratorArg, BasicCodeGenerator>> codeGenerators) throws MojoFailureException {
178 ImportResolutionMode requestedMode = null;
179 BasicCodeGenerator requestingGenerator = null;
181 for (Entry<CodeGeneratorArg, BasicCodeGenerator> entry : codeGenerators) {
182 final BasicCodeGenerator generator = entry.getValue();
183 final ImportResolutionMode mode = generator.getImportResolutionMode();
185 // the generator does not care about the mode
189 if (requestedMode == null) {
190 // No mode yet, we have just determined it
191 requestedMode = mode;
192 requestingGenerator = generator;
196 if (mode != requestedMode) {
197 throw new MojoFailureException(String.format(
198 "Import resolution mode conflict between %s (%s) and %s (%s)", requestingGenerator, requestedMode,
203 if (requestedMode == null) {
204 return StatementParserMode.DEFAULT_MODE;
206 switch (requestedMode) {
207 case REVISION_EXACT_OR_LATEST:
208 return StatementParserMode.DEFAULT_MODE;
210 return StatementParserMode.SEMVER_MODE;
212 throw new IllegalStateException("Unhandled import resolution mode " + requestedMode);
216 private List<Entry<CodeGeneratorArg, BasicCodeGenerator>> instantiateGenerators() throws MojoExecutionException {
217 final List<Entry<CodeGeneratorArg, BasicCodeGenerator>> generators = new ArrayList<>(codeGeneratorArgs.size());
218 for (CodeGeneratorArg arg : codeGeneratorArgs) {
221 final BasicCodeGenerator generator;
223 generator = getInstance(arg.getCodeGeneratorClass(), BasicCodeGenerator.class);
224 } catch (ClassNotFoundException | InstantiationException | IllegalAccessException e) {
225 throw new MojoExecutionException("Failed to instantiate code generator "
226 + arg.getCodeGeneratorClass(), e);
229 LOG.info("{} Code generator instantiated from {}", LOG_PREFIX, arg.getCodeGeneratorClass());
230 generators.add(new SimpleImmutableEntry<>(arg, generator));
236 @SuppressWarnings("checkstyle:illegalCatch")
237 private Optional<ProcessorModuleReactor> createReactor(final StatementParserMode parserMode,
238 final List<File> yangFilesInProject) throws MojoExecutionException {
239 LOG.info("{} Inspecting {}", LOG_PREFIX, yangFilesRootDir);
242 final Collection<File> allFiles = new ArrayList<>(yangFilesInProject);
243 if (inspectDependencies) {
244 allFiles.addAll(Util.findYangFilesInDependencies(project));
248 * Check if any of the listed files changed. If no changes occurred,
249 * simply return null, which indicates and of execution.
251 if (!allFiles.stream().anyMatch(buildContext::hasDelta)) {
252 LOG.info("{} None of {} input files changed", LOG_PREFIX, allFiles.size());
253 return Optional.empty();
256 final YangParser parser = parserFactory.createParser(parserMode);
257 final List<YangTextSchemaSource> sourcesInProject = new ArrayList<>(yangFilesInProject.size());
258 for (final File f : yangFilesInProject) {
259 final YangTextSchemaSource textSource = YangTextSchemaSource.forFile(f);
260 final ASTSchemaSource astSource = TextToASTTransformer.transformText(textSource);
262 parser.addSource(astSource);
264 if (!astSource.getIdentifier().equals(textSource.getIdentifier())) {
265 // AST indicates a different source identifier, make sure we use that
266 sourcesInProject.add(YangTextSchemaSource.delegateForByteSource(astSource.getIdentifier(),
269 sourcesInProject.add(textSource);
273 LOG.debug("Processed project files: {}", yangFilesInProject);
274 LOG.info("{} Project model files parsed: {}", LOG_PREFIX, yangFilesInProject.size());
276 final ProcessorModuleReactor reactor = new ProcessorModuleReactor(parser, sourcesInProject);
277 LOG.debug("Initialized reactor {}", reactor, yangFilesInProject);
278 return Optional.of(reactor);
279 } catch (Exception e) {
280 // MojoExecutionException is thrown since execution cannot continue
281 LOG.error("{} Unable to parse YANG files from {}", LOG_PREFIX, yangFilesRootDir, e);
282 Throwable rootCause = Throwables.getRootCause(e);
283 throw new MojoExecutionException(LOG_PREFIX + " Unable to parse YANG files from " + yangFilesRootDir,
288 private ContextHolder createContextHolder(final ProcessorModuleReactor reactor) throws MojoFailureException,
289 IOException, YangParserException {
291 * Set contains all modules generated from input sources. Number of
292 * modules may differ from number of sources due to submodules
293 * (parsed submodule's data are added to its parent module). Set
294 * cannot contains null values.
296 if (inspectDependencies) {
297 final List<YangTextSchemaSource> sourcesInDependencies = Util.findYangFilesInDependenciesAsStream(
299 for (YangTextSchemaSource s : toUniqueSources(sourcesInDependencies)) {
300 reactor.registerSourceFromDependency(s);
304 return reactor.toContext();
307 private static List<File> listFiles(final File root, final Collection<File> excludedFiles)
309 if (!root.isDirectory()) {
310 LOG.warn("{} YANG source directory {} not found. No code will be generated.", LOG_PREFIX, root);
311 return ImmutableList.of();
314 return Files.walk(root.toPath()).map(Path::toFile).filter(File::isFile).filter(f -> {
315 if (excludedFiles.contains(f)) {
316 LOG.info("{} YANG file excluded {}", LOG_PREFIX, f);
320 }).filter(f -> f.getName().endsWith(YangConstants.RFC6020_YANG_FILE_EXTENSION)).collect(Collectors.toList());
323 private static Collection<YangTextSchemaSource> toUniqueSources(final Collection<YangTextSchemaSource> sources)
325 final Map<String, YangTextSchemaSource> byContent = new HashMap<>();
326 for (YangTextSchemaSource s : sources) {
327 try (Reader reader = s.asCharSource(StandardCharsets.UTF_8).openStream()) {
328 final String contents = CharStreams.toString(reader);
329 byContent.putIfAbsent(contents, s);
332 return byContent.values();
336 * Call generate on every generator from plugin configuration.
338 @SuppressWarnings("checkstyle:illegalCatch")
339 private void generateSources(final ContextHolder context,
340 final Collection<Entry<CodeGeneratorArg, BasicCodeGenerator>> generators) throws MojoFailureException {
341 if (generators.isEmpty()) {
342 LOG.warn("{} No code generators provided", LOG_PREFIX);
346 final Map<String, String> thrown = new HashMap<>();
347 for (Entry<CodeGeneratorArg, BasicCodeGenerator> entry : generators) {
348 final String codeGeneratorClass = entry.getKey().getCodeGeneratorClass();
351 generateSourcesWithOneGenerator(context, entry.getKey(), entry.getValue());
352 } catch (Exception e) {
353 // try other generators, exception will be thrown after
354 LOG.error("{} Unable to generate sources with {} generator", LOG_PREFIX, codeGeneratorClass, e);
355 thrown.put(codeGeneratorClass, e.getClass().getCanonicalName());
359 if (!thrown.isEmpty()) {
360 String message = " One or more code generators failed, including failed list(generatorClass=exception) ";
361 LOG.error("{}{}{}", LOG_PREFIX, message, thrown.toString());
362 throw new MojoFailureException(LOG_PREFIX + message + thrown.toString());
367 * Complete initialization of a code generator and invoke it.
369 private void generateSourcesWithOneGenerator(final ContextHolder context, final CodeGeneratorArg codeGeneratorCfg,
370 final BasicCodeGenerator codeGenerator) throws IOException {
372 final File outputDir = requireNonNull(codeGeneratorCfg.getOutputBaseDir(project),
373 "outputBaseDir is null. Please provide a valid outputBaseDir value in pom.xml");
375 project.addCompileSourceRoot(outputDir.getAbsolutePath());
377 LOG.info("{} Sources will be generated to {}", LOG_PREFIX, outputDir);
378 LOG.debug("{} Project root dir is {}", LOG_PREFIX, project.getBasedir());
379 LOG.debug("{} Additional configuration picked up for : {}: {}", LOG_PREFIX, codeGeneratorCfg
380 .getCodeGeneratorClass(), codeGeneratorCfg.getAdditionalConfiguration());
382 if (codeGenerator instanceof BuildContextAware) {
383 ((BuildContextAware)codeGenerator).setBuildContext(buildContext);
385 if (codeGenerator instanceof MavenProjectAware) {
386 ((MavenProjectAware)codeGenerator).setMavenProject(project);
388 codeGenerator.setAdditionalConfig(codeGeneratorCfg.getAdditionalConfiguration());
389 File resourceBaseDir = codeGeneratorCfg.getResourceBaseDir(project);
391 YangProvider.setResource(resourceBaseDir, project);
392 codeGenerator.setResourceBaseDir(resourceBaseDir);
393 LOG.debug("{} Folder: {} marked as resources for generator: {}", LOG_PREFIX, resourceBaseDir,
394 codeGeneratorCfg.getCodeGeneratorClass());
396 if (outputDir.exists()) {
397 Files.walk(outputDir.toPath()).sorted(Comparator.reverseOrder()).map(Path::toFile).forEach(File::delete);
398 LOG.info("{} Succesfully deleted output directory {}", LOG_PREFIX, outputDir);
400 Collection<File> generated = codeGenerator.generateSources(context.getContext(), outputDir,
401 context.getYangModules(), context::moduleToResourcePath);
403 LOG.info("{} Sources generated by {}: {}", LOG_PREFIX, codeGeneratorCfg.getCodeGeneratorClass(), generated);
407 * Instantiate object from fully qualified class name.
409 private static <T> T getInstance(final String codeGeneratorClass, final Class<T> baseType) throws
410 ClassNotFoundException, InstantiationException, IllegalAccessException {
411 final Class<?> clazz = Class.forName(codeGeneratorClass);
412 checkArgument(baseType.isAssignableFrom(clazz), "Code generator %s has to implement %s", clazz, baseType);
413 return baseType.cast(clazz.newInstance());