[ONOS-3906],[ONOS-3910] Implementation of YANG module and leaf/leaf-list translator.
Change-Id: If1a8a991ffafa14b51211f97c435176ee1bf856f
diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/utils/io/impl/YangIoUtils.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/utils/io/impl/YangIoUtils.java
new file mode 100644
index 0000000..af83de4
--- /dev/null
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/utils/io/impl/YangIoUtils.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright 2016 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.yangutils.utils.io.impl;
+
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.List;
+
+import org.sonatype.plexus.build.incremental.BuildContext;
+import org.apache.maven.project.MavenProject;
+import org.apache.maven.model.Resource;
+
+import org.onosproject.yangutils.utils.UtilConstants;
+
+import static org.slf4j.LoggerFactory.getLogger;
+import org.slf4j.Logger;
+
+/**
+ * Provides common utility functionalities for code generation.
+ */
+public final class YangIoUtils {
+
+ private static final Logger log = getLogger(YangIoUtils.class);
+
+ /**
+ * Default constructor.
+ */
+ private YangIoUtils() {
+ }
+
+ /**
+ * Creates the directory structure.
+ *
+ * @param path directory path
+ * @return directory structure
+ */
+ public static File createDirectories(String path) {
+
+ File generatedDir = new File(UtilConstants.YANG_GEN_DIR + File.separator + path);
+ generatedDir.mkdirs();
+ return generatedDir;
+ }
+
+ /**
+ * Adds package info file for the created directory.
+ *
+ * @param path directory path
+ * @param classInfo class info for the package
+ * @param pack package of the directory
+ * @throws IOException when fails to create package info file.
+ */
+ public static void addPackageInfo(File path, String classInfo, String pack) throws IOException {
+
+ try {
+
+ File packageInfo = new File(path + File.separator + "package-info.java");
+ packageInfo.createNewFile();
+ if (packageInfo.exists()) {
+
+ FileWriter fileWriter = null;
+ BufferedWriter bufferedWriter = null;
+ fileWriter = new FileWriter(packageInfo);
+ bufferedWriter = new BufferedWriter(fileWriter);
+ bufferedWriter.write(CopyrightHeader.getCopyrightHeader());
+ bufferedWriter.write(JavaDocGen.getJavaDoc(JavaDocGen.JavaDocType.PACKAGE_INFO, classInfo));
+ bufferedWriter.write(UtilConstants.PACKAGE + UtilConstants.SPACE + pack + UtilConstants.SEMI_COLAN);
+ bufferedWriter.close();
+ }
+ } catch (IOException e) {
+ throw new IOException("Exception occured while creating package info file.");
+ }
+ }
+
+ /**
+ * Cleans the generated directory if already exist in source folder.
+ *
+ * @param baseDir generated directory in previous build.
+ */
+ public static void clean(String baseDir) {
+ File generatedDirectory = new File(baseDir + File.separator + UtilConstants.YANG_GEN_DIR);
+ if (generatedDirectory.exists()) {
+ List<String> javafiles;
+ try {
+ javafiles = YangFileScanner.getJavaFiles(generatedDirectory.toString());
+ for (String file : javafiles) {
+ File currentFile = new File(file);
+ currentFile.delete();
+ }
+ } catch (IOException e) {
+ log.info("Failed to delete the generated files in " + generatedDirectory + " directory");
+ }
+ generatedDirectory.delete();
+ }
+ }
+
+ /**
+ * Adds generated source directory to the compilation root.
+ *
+ * @param source directory
+ * @param project current maven project
+ * @param context current build context
+ */
+ public static void addToSource(String source, MavenProject project, BuildContext context) {
+
+ project.addCompileSourceRoot(source);
+ Resource rsc = new Resource();
+ rsc.setDirectory(source);
+ project.addResource(rsc);
+ context.refresh(project.getBasedir());
+ log.info("Source directory added to compilation root: " + source);
+ }
+
+}