Get rid of commons-io
[yangtools.git] / yang / yang-maven-plugin / src / main / java / org / opendaylight / yangtools / yang2sources / plugin / YangToSourcesProcessor.java
index 3de8eef5ebce7c5c2823f1a7213a5b65a966669f..ff274d19e22403a57f76eee5f6e6013ee2cb598d 100644 (file)
@@ -7,35 +7,36 @@
  */
 package org.opendaylight.yangtools.yang2sources.plugin;
 
-import java.util.HashSet;
-import org.opendaylight.yangtools.yang.parser.stmt.reactor.CrossSourceStatementReactor;
-import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.YangInferencePipeline;
 import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Preconditions;
 import com.google.common.base.Throwables;
-import com.google.common.collect.Maps;
-import java.io.Closeable;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.io.CharStreams;
 import java.io.File;
 import java.io.IOException;
-import java.io.InputStream;
+import java.io.Reader;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
 import java.util.Set;
-import java.util.concurrent.ConcurrentMap;
-import org.apache.commons.io.IOUtils;
-import org.apache.maven.model.Resource;
+import java.util.stream.Collectors;
 import org.apache.maven.plugin.MojoExecutionException;
 import org.apache.maven.plugin.MojoFailureException;
 import org.apache.maven.project.MavenProject;
-import org.opendaylight.yangtools.yang.model.api.Module;
-import org.opendaylight.yangtools.yang.model.api.SchemaContext;
-import org.opendaylight.yangtools.yang.parser.repo.URLSchemaContextResolver;
-import org.opendaylight.yangtools.yang.parser.util.NamedFileInputStream;
+import org.opendaylight.yangtools.yang.common.YangConstants;
+import org.opendaylight.yangtools.yang.model.parser.api.YangSyntaxErrorException;
+import org.opendaylight.yangtools.yang.model.repo.api.SchemaSourceException;
+import org.opendaylight.yangtools.yang.model.repo.api.YangTextSchemaSource;
+import org.opendaylight.yangtools.yang.parser.repo.YangTextSchemaContextResolver;
 import org.opendaylight.yangtools.yang2sources.plugin.ConfigArg.CodeGeneratorArg;
-import org.opendaylight.yangtools.yang2sources.plugin.Util.ContextHolder;
-import org.opendaylight.yangtools.yang2sources.plugin.Util.YangsInZipsResult;
 import org.opendaylight.yangtools.yang2sources.spi.BasicCodeGenerator;
 import org.opendaylight.yangtools.yang2sources.spi.BuildContextAware;
 import org.opendaylight.yangtools.yang2sources.spi.MavenProjectAware;
@@ -48,59 +49,91 @@ class YangToSourcesProcessor {
     private static final Logger LOG = LoggerFactory.getLogger(YangToSourcesProcessor.class);
 
     static final String LOG_PREFIX = "yang-to-sources:";
-    static final String META_INF_YANG_STRING = "META-INF" + File.separator + "yang";
-    static final String META_INF_YANG_STRING_JAR = "META-INF" + "/" + "yang";
+    private static final String META_INF_STR = "META-INF";
+    private static final String YANG_STR = "yang";
+
+    static final String META_INF_YANG_STRING = META_INF_STR + File.separator + YANG_STR;
+    static final String META_INF_YANG_STRING_JAR = META_INF_STR + "/" + YANG_STR;
+    static final String META_INF_YANG_SERVICES_STRING_JAR = META_INF_STR + "/" + "services";
 
     private final File yangFilesRootDir;
-    private final File[] excludedFiles;
+    private final Set<File> excludedFiles;
     private final List<CodeGeneratorArg> codeGenerators;
     private final MavenProject project;
     private final boolean inspectDependencies;
     private final BuildContext buildContext;
     private final YangProvider yangProvider;
-    private final URLSchemaContextResolver resolver;
+
+    private YangToSourcesProcessor(final BuildContext buildContext, final File yangFilesRootDir,
+            final Collection<File> excludedFiles, final List<CodeGeneratorArg> codeGenerators,
+            final MavenProject project, final boolean inspectDependencies, final YangProvider yangProvider) {
+        this.buildContext = Preconditions.checkNotNull(buildContext, "buildContext");
+        this.yangFilesRootDir = Preconditions.checkNotNull(yangFilesRootDir, "yangFilesRootDir");
+        this.excludedFiles = ImmutableSet.copyOf(excludedFiles);
+        this.codeGenerators = ImmutableList.copyOf(codeGenerators);
+        this.project = Preconditions.checkNotNull(project);
+        this.inspectDependencies = inspectDependencies;
+        this.yangProvider = Preconditions.checkNotNull(yangProvider);
+    }
 
     @VisibleForTesting
-    YangToSourcesProcessor(File yangFilesRootDir, File[] excludedFiles, List<CodeGeneratorArg> codeGenerators,
-            MavenProject project, boolean inspectDependencies, YangProvider yangProvider) {
+    YangToSourcesProcessor(final File yangFilesRootDir, final Collection<File> excludedFiles,
+            final List<CodeGeneratorArg> codeGenerators, final MavenProject project, final boolean inspectDependencies,
+            final YangProvider yangProvider) {
         this(new DefaultBuildContext(), yangFilesRootDir, excludedFiles, codeGenerators, project,
                 inspectDependencies, yangProvider);
     }
 
-    private YangToSourcesProcessor(BuildContext buildContext, File yangFilesRootDir, File[] excludedFiles,
-            List<CodeGeneratorArg> codeGenerators, MavenProject project, boolean inspectDependencies, YangProvider
-                                           yangProvider) {
-        this.buildContext = Util.checkNotNull(buildContext, "buildContext");
-        this.yangFilesRootDir = Util.checkNotNull(yangFilesRootDir, "yangFilesRootDir");
-        this.excludedFiles = new File[excludedFiles.length];
-        int i = 0;
-        for (File file : excludedFiles) {
-            this.excludedFiles[i++] = new File(file.getPath());
-        }
-        this.codeGenerators = Collections.unmodifiableList(Util.checkNotNull(codeGenerators, "codeGenerators"));
-        this.project = Util.checkNotNull(project, "project");
-        this.inspectDependencies = inspectDependencies;
-        this.yangProvider = yangProvider;
-        this.resolver = URLSchemaContextResolver.create("maven-plugin");
+    YangToSourcesProcessor(final BuildContext buildContext, final File yangFilesRootDir,
+                final Collection<File> excludedFiles, final List<CodeGeneratorArg> codeGenerators,
+                final MavenProject project, final boolean inspectDependencies) {
+        this(yangFilesRootDir, excludedFiles, codeGenerators, project, inspectDependencies, YangProvider.getInstance());
     }
 
-    YangToSourcesProcessor(BuildContext buildContext, File yangFilesRootDir, File[] excludedFiles,
-                           List<CodeGeneratorArg> codeGenerators, MavenProject project, boolean inspectDependencies) {
-        this(yangFilesRootDir, excludedFiles, codeGenerators, project, inspectDependencies, new YangProvider());
+    public void execute() throws MojoExecutionException, MojoFailureException {
+        conditionalExecute(false);
     }
 
-    public void execute() throws MojoExecutionException, MojoFailureException {
-        ContextHolder context = processYang();
-        if (context != null) {
-            generateSources(context);
-            yangProvider.addYangsToMetaInf(project, yangFilesRootDir, excludedFiles);
+    void conditionalExecute(final boolean skip) throws MojoExecutionException, MojoFailureException {
+        final Optional<ProcessorModuleReactor> optReactor = createReactor();
+        if (!optReactor.isPresent()) {
+            return;
+        }
+
+        final ProcessorModuleReactor reactor = optReactor.get();
+        if (!skip) {
+            final ContextHolder holder;
+
+            try {
+                holder = createContextHolder(reactor);
+            } catch (SchemaSourceException | YangSyntaxErrorException e) {
+                throw new MojoFailureException("Failed to process reactor " + reactor, e);
+            } catch (IOException e) {
+                throw new MojoExecutionException("Failed to read reactor " + reactor, e);
+            }
+
+            generateSources(holder);
+        } else {
+            LOG.info("Skipping YANG code generation because property yang.skip is true");
+        }
+
+        // add META_INF/yang
+        final Collection<YangTextSchemaSource> models = reactor.getModelsInProject();
+        try {
+            yangProvider.addYangsToMetaInf(project, models);
+        } catch (IOException e) {
+            throw new MojoExecutionException("Failed write model files for " + models, e);
         }
+
+        // add META_INF/services
+        File generatedServicesDir = new GeneratedDirectories(project).getYangServicesDir();
+        YangProvider.setResource(generatedServicesDir, project);
+        LOG.debug("{} Yang services files from: {} marked as resources: {}", LOG_PREFIX, generatedServicesDir,
+            META_INF_YANG_SERVICES_STRING_JAR);
     }
 
-    private ContextHolder processYang() throws MojoExecutionException {
-        final CrossSourceStatementReactor.BuildAction reactor = YangInferencePipeline.RFC6020_REACTOR.newBuild();
-        SchemaContext resolveSchemaContext;
-        List<Closeable> closeables = new ArrayList<>();
+    @SuppressWarnings("checkstyle:illegalCatch")
+    private Optional<ProcessorModuleReactor> createReactor() throws MojoExecutionException {
         LOG.info("{} Inspecting {}", LOG_PREFIX, yangFilesRootDir);
         try {
             /*
@@ -108,8 +141,7 @@ class YangToSourcesProcessor {
              * files in current project and optionally any jars/files in the
              * dependencies.
              */
-            final Collection<File> yangFilesInProject = Util.listFiles(yangFilesRootDir, excludedFiles);
-
+            final Collection<File> yangFilesInProject = listFiles(yangFilesRootDir, excludedFiles);
 
             final Collection<File> allFiles = new ArrayList<>(yangFilesInProject);
             if (inspectDependencies) {
@@ -117,8 +149,8 @@ class YangToSourcesProcessor {
             }
 
             if (allFiles.isEmpty()) {
-               LOG.info("{} No input files found", LOG_PREFIX);
-                return null;
+                LOG.info("{} No input files found", LOG_PREFIX);
+                return Optional.empty();
             }
 
             /*
@@ -136,150 +168,87 @@ class YangToSourcesProcessor {
 
             if (noChange) {
                 LOG.info("{} None of {} input files changed", LOG_PREFIX, allFiles.size());
-                return null;
+                return Optional.empty();
             }
 
-            final List<NamedFileInputStream> yangsInProject = new ArrayList<>();
+            final YangTextSchemaContextResolver resolver = YangTextSchemaContextResolver.create("maven-plugin");
             for (final File f : yangFilesInProject) {
-                // FIXME: This is hack - normal path should be reported.
-                yangsInProject.add(new NamedFileInputStream(f, META_INF_YANG_STRING + File.separator + f.getName()));
-            }
-
-            List<InputStream> all = new ArrayList<>();
-            all.addAll(yangsInProject);
-            closeables.addAll(yangsInProject);
-
-            /**
-             * Set contains all modules generated from input sources. Number of
-             * modules may differ from number of sources due to submodules
-             * (parsed submodule's data are added to its parent module). Set
-             * cannot contains null values.
-             */
-            Set<Module> projectYangModules;
-            try {
-                if (inspectDependencies) {
-                    YangsInZipsResult dependentYangResult = Util.findYangFilesInDependenciesAsStream(project);
-                    Closeable dependentYangResult1 = dependentYangResult;
-                    closeables.add(dependentYangResult1);
-                    List<InputStream> yangStreams = toStreamsWithoutDuplicates(dependentYangResult.getYangStreams());
-                    all.addAll(yangStreams);
-                    closeables.addAll(yangStreams);
-                }
-
-                resolveSchemaContext = reactor.buildEffective(all);
-
-                Set<Module> parsedAllYangModules = resolveSchemaContext.getModules();
-                projectYangModules = new HashSet<>();
-                for (Module module : parsedAllYangModules) {
-                    final String path = module.getModuleSourcePath();
-                    if (path != null) {
-                        LOG.debug("Looking for source {}", path);
-                        for (NamedFileInputStream is : yangsInProject) {
-                            LOG.debug("In project destination {}", is.getFileDestination());
-                            if (path.equals(is.getFileDestination())) {
-                                LOG.debug("Module {} belongs to current project", module);
-                                projectYangModules.add(module);
-                                break;
-                            }
-                        }
-                    }
-                }
-            } finally {
-                for (AutoCloseable closeable : closeables) {
-                    closeable.close();
-                }
+                resolver.registerSource(YangTextSchemaSource.forFile(f));
             }
 
-            LOG.info("{} {} files parsed from {}", LOG_PREFIX, Util.YANG_SUFFIX.toUpperCase(), yangsInProject);
-            return new ContextHolder(resolveSchemaContext, projectYangModules);
+            LOG.debug("Processed project files: {}", yangFilesInProject);
+            LOG.info("{} Project model files parsed: {}", LOG_PREFIX, yangFilesInProject.size());
 
-            // MojoExecutionException is thrown since execution cannot continue
+            final ProcessorModuleReactor reactor = new ProcessorModuleReactor(resolver);
+            LOG.debug("Initialized reactor {}", reactor, yangFilesInProject);
+            return Optional.of(reactor);
         } catch (Exception e) {
-            LOG.error("{} Unable to parse {} files from {}", LOG_PREFIX, Util.YANG_SUFFIX, yangFilesRootDir, e);
+            // MojoExecutionException is thrown since execution cannot continue
+            LOG.error("{} Unable to parse YANG files from {}", LOG_PREFIX, yangFilesRootDir, e);
             Throwable rootCause = Throwables.getRootCause(e);
-            throw new MojoExecutionException(LOG_PREFIX + " Unable to parse " + Util.YANG_SUFFIX + " files from " +
-                    yangFilesRootDir, rootCause);
+            throw new MojoExecutionException(LOG_PREFIX + " Unable to parse YANG files from " + yangFilesRootDir,
+                rootCause);
         }
     }
 
-    private List<InputStream> toStreamsWithoutDuplicates(List<YangSourceFromDependency> list) throws IOException {
-        ConcurrentMap<String, YangSourceFromDependency> byContent = Maps.newConcurrentMap();
-
-        for (YangSourceFromDependency yangFromDependency : list) {
-            try (InputStream dataStream = yangFromDependency.openStream()) {
-                String contents = IOUtils.toString(dataStream);
-                byContent.putIfAbsent(contents, yangFromDependency);
+    private ContextHolder createContextHolder(final ProcessorModuleReactor reactor) throws MojoFailureException,
+            IOException, SchemaSourceException, YangSyntaxErrorException {
+        /**
+         * Set contains all modules generated from input sources. Number of
+         * modules may differ from number of sources due to submodules
+         * (parsed submodule's data are added to its parent module). Set
+         * cannot contains null values.
+         */
+        if (inspectDependencies) {
+            final List<YangTextSchemaSource> sourcesInDependencies = Util.findYangFilesInDependenciesAsStream(
+                project);
+            for (YangTextSchemaSource s : toUniqueSources(sourcesInDependencies)) {
+                reactor.registerSource(s);
             }
-
-        }
-        List<InputStream> inputs = new ArrayList<>(byContent.size());
-        for (YangSourceFromDependency entry : byContent.values()) {
-            inputs.add(entry.openStream());
         }
-        return inputs;
-    }
-
-    static class YangProvider {
-        private static final Logger LOG = LoggerFactory.getLogger(YangProvider.class);
 
-        void addYangsToMetaInf(MavenProject project, File yangFilesRootDir, File[] excludedFiles)
-                throws MojoFailureException {
-
-            // copy project's src/main/yang/*.yang to target/generated-sources/yang/META-INF/yang/*.yang
-
-            File generatedYangDir = new File(project.getBasedir(), CodeGeneratorArg.YANG_GENERATED_DIR);
-            addYangsToMetaInf(project, yangFilesRootDir, excludedFiles, generatedYangDir);
-
-            // Also copy to the actual build output dir if different than "target". When running in
-            // Eclipse this can differ (eg "target-ide").
+        return reactor.toContext();
+    }
 
-            File actualGeneratedYangDir = new File(project.getBuild().getDirectory(),
-                    CodeGeneratorArg.YANG_GENERATED_DIR.replace("target" + File.separator, ""));
-            if(!actualGeneratedYangDir.equals(generatedYangDir)) {
-                addYangsToMetaInf(project, yangFilesRootDir, excludedFiles, actualGeneratedYangDir);
-            }
+    private static Collection<File> listFiles(final File root, final Collection<File> excludedFiles)
+            throws IOException {
+        if (!root.isDirectory()) {
+            LOG.warn("{} YANG source directory {} not found. No code will be generated.", LOG_PREFIX, root);
+            return ImmutableList.of();
         }
 
-        private void addYangsToMetaInf(MavenProject project, File yangFilesRootDir,
-                File[] excludedFiles, File generatedYangDir)
-                throws MojoFailureException {
-
-            File withMetaInf = new File(generatedYangDir, META_INF_YANG_STRING);
-            withMetaInf.mkdirs();
-
-            try {
-                Collection<File> files = Util.listFiles(yangFilesRootDir, excludedFiles);
-                for (File file : files) {
-                    org.apache.commons.io.FileUtils.copyFile(file, new File(withMetaInf, file.getName()));
-                }
-            } catch (IOException e) {
-                LOG.warn("Failed to generate files into root {}", yangFilesRootDir, e);
-                throw new MojoFailureException("Unable to list yang files into resource folder", e);
+        return Files.walk(root.toPath()).map(Path::toFile).filter(File::isFile).filter(f -> {
+            if (excludedFiles.contains(f)) {
+                LOG.info("{} YANG file excluded {}", LOG_PREFIX, f);
+                return false;
             }
+            return true;
+        }).filter(f -> f.getName().endsWith(YangConstants.RFC6020_YANG_FILE_EXTENSION)).collect(Collectors.toList());
+    }
 
-            setResource(generatedYangDir, project);
-
-            LOG.debug("{} Yang files from: {} marked as resources: {}", LOG_PREFIX, yangFilesRootDir,
-                    META_INF_YANG_STRING_JAR);
-        }
-
-        private static void setResource(File targetYangDir, MavenProject project) {
-            Resource res = new Resource();
-            res.setDirectory(targetYangDir.getPath());
-            project.addResource(res);
+    private static Collection<YangTextSchemaSource> toUniqueSources(final Collection<YangTextSchemaSource> sources)
+            throws IOException {
+        final Map<String, YangTextSchemaSource> byContent = new HashMap<>();
+        for (YangTextSchemaSource s : sources) {
+            try (Reader reader = s.asCharSource(StandardCharsets.UTF_8).openStream()) {
+                final String contents = CharStreams.toString(reader);
+                byContent.putIfAbsent(contents, s);
+            }
         }
+        return byContent.values();
     }
 
     /**
-     * Call generate on every generator from plugin configuration
+     * Call generate on every generator from plugin configuration.
      */
-    private void generateSources(ContextHolder context) throws MojoFailureException {
+    @SuppressWarnings("checkstyle:illegalCatch")
+    private void generateSources(final ContextHolder context) throws MojoFailureException {
         if (codeGenerators.size() == 0) {
             LOG.warn("{} No code generators provided", LOG_PREFIX);
             return;
         }
 
-        Map<String, String> thrown = Maps.newHashMap();
+        final Map<String, String> thrown = new HashMap<>();
         for (CodeGeneratorArg codeGenerator : codeGenerators) {
             try {
                 generateSourcesWithOneGenerator(context, codeGenerator);
@@ -299,25 +268,25 @@ class YangToSourcesProcessor {
     }
 
     /**
-     * Instantiate generator from class and call required method
+     * Instantiate generator from class and call required method.
      */
-    private void generateSourcesWithOneGenerator(ContextHolder context, CodeGeneratorArg codeGeneratorCfg)
+    private void generateSourcesWithOneGenerator(final ContextHolder context, final CodeGeneratorArg codeGeneratorCfg)
             throws ClassNotFoundException, InstantiationException, IllegalAccessException, IOException {
 
         codeGeneratorCfg.check();
 
-        BasicCodeGenerator g = Util.getInstance(codeGeneratorCfg.getCodeGeneratorClass(), BasicCodeGenerator.class);
+        final BasicCodeGenerator g = getInstance(codeGeneratorCfg.getCodeGeneratorClass(), BasicCodeGenerator.class);
         LOG.info("{} Code generator instantiated from {}", LOG_PREFIX, codeGeneratorCfg.getCodeGeneratorClass());
 
-        File outputDir = codeGeneratorCfg.getOutputBaseDir(project);
+        final File outputDir = codeGeneratorCfg.getOutputBaseDir(project);
 
-        if (outputDir != null) {
-          project.addCompileSourceRoot(outputDir.getAbsolutePath());
-        } else {
-          throw new NullPointerException("outputBaseDir is null. Please provide a valid outputBaseDir value in the " +
-                  "pom.xml");
+        if (outputDir == null) {
+            throw new NullPointerException("outputBaseDir is null. Please provide a valid outputBaseDir value in the "
+                    + "pom.xml");
         }
 
+        project.addCompileSourceRoot(outputDir.getAbsolutePath());
+
         LOG.info("{} Sources will be generated to {}", LOG_PREFIX, outputDir);
         LOG.debug("{} Project root dir is {}", LOG_PREFIX, project.getBasedir());
         LOG.debug("{} Additional configuration picked up for : {}: {}", LOG_PREFIX, codeGeneratorCfg
@@ -337,9 +306,25 @@ class YangToSourcesProcessor {
         LOG.debug("{} Folder: {} marked as resources for generator: {}", LOG_PREFIX, resourceBaseDir,
                 codeGeneratorCfg.getCodeGeneratorClass());
 
-        Collection<File> generated = g.generateSources(context.getContext(), outputDir, context.getYangModules());
+        if (outputDir.exists()) {
+            Files.walk(outputDir.toPath()).sorted(Comparator.reverseOrder()).map(Path::toFile).forEach(File::delete);
+            LOG.info("{} Succesfully deleted output directory {}", LOG_PREFIX, outputDir);
+        }
+        Collection<File> generated = g.generateSources(context.getContext(), outputDir, context.getYangModules(),
+            context::moduleToResourcePath);
 
         LOG.info("{} Sources generated by {}: {}", LOG_PREFIX, codeGeneratorCfg.getCodeGeneratorClass(), generated);
     }
 
+    /**
+     * Instantiate object from fully qualified class name.
+     */
+    private static <T> T getInstance(final String codeGeneratorClass, final Class<T> baseType) throws
+            ClassNotFoundException, InstantiationException, IllegalAccessException {
+        final Class<?> clazz = Class.forName(codeGeneratorClass);
+
+        Preconditions.checkArgument(baseType.isAssignableFrom(clazz), "Code generator %s has to implement %s", clazz,
+            baseType);
+        return baseType.cast(clazz.newInstance());
+    }
 }