[ONOS-4547, ONOS-4566, ONOS-4575, ONOS-4582, ONOS-4581, ONOS-4600,

ONOS-4598, ONOS-4607, ONOS-4610, ONOS-4611] Prefix addition from config
 and defect fixes.

Change-Id: Ieaab5d3e0fe9a1bfa24a2527eeec5435cf0a1b85

@@ -41,4 +41,6 @@
     <suppress checks="JavadocPackage"
               files=".*/thirdparty/.*.java"/>
 
+    <!-- Suppressions for yangutils generated code -->
+    <suppress files="org.onosproject.yang.gen.v1.*" checks="JavadocStyle" />
 </suppressions>

@@ -31,7 +31,7 @@ import org.onosproject.yangutils.utils.YangConstructType;
 /**
  * Represents the enumeration data type information.
  */
-public class YangEnumeration extends YangNode implements Parsable {
+public class YangEnumeration extends YangNode implements Parsable, CollisionDetector {
 
     // Enumeration info set.
     private Set<YangEnum> enumSet;
@@ -126,4 +126,18 @@ public class YangEnumeration extends YangNode implements Parsable {
     public void validateDataOnExit() throws DataModelException {
         // TODO auto-generated method stub, to be implemented by parser
     }
+
+    @Override
+    public void detectCollidingChild(String identifierName, YangConstructType dataType) throws DataModelException {
+        /*
+        Do nothing.The implementation for this is not required.
+         */
+    }
+
+    @Override
+    public void detectSelfCollision(String identifierName, YangConstructType dataType) throws DataModelException {
+        /*
+        Do nothing.The implementation for this is not required.
+         */
+    }
 }

@@ -444,8 +444,8 @@ public class YangList extends YangNode
         validateConfig(leaves, leafLists);
 
         /* A list must have atleast one key leaf if config is true */
-        if (isConfig
-                && (keys == null || leaves == null && leafLists == null && !isUsesPresentInList())) {
+        if (isConfig && (keys == null || leaves == null && leafLists == null) && !isUsesPresentInList()
+                && !isListPresentInGrouping()) {
             throw new DataModelException("A list must have atleast one key leaf if config is true;");
         } else if (keys != null) {
             validateKey(leaves, leafLists, keys);
@@ -565,7 +565,7 @@ public class YangList extends YangNode
                 }
             }
 
-            if (!leafFound && !isUsesPresentInList()) {
+            if (!leafFound && !isUsesPresentInList() && !isListPresentInGrouping()) {
                 throw new DataModelException("An identifier, in key, must refer to a child leaf of the list");
             }
             leafFound = false;
@@ -617,6 +617,18 @@ public class YangList extends YangNode
             node = node.getNextSibling();
         }
         return false;
+        // TODO When grouping linking is done this method has to be modified.
     }
 
+    private boolean isListPresentInGrouping() {
+        YangNode node = this.getParent();
+        while (node != null) {
+            if (node instanceof YangGrouping) {
+                return true;
+            }
+            node = node.getParent();
+        }
+        return false;
+        // TODO When grouping linking is done this method has to be modified.
+    }
 }

@@ -122,6 +122,12 @@ public class YangUtilManager extends AbstractMojo {
     private String replacementForHyphen;
 
     /**
+     * Prefix which is required for adding with the identifier.
+     */
+    @Parameter(property = "prefixForIdentifier")
+    private String prefixForIdentifier;
+
+    /**
      * Build context.
      */
     @Component
@@ -146,6 +152,7 @@ public class YangUtilManager extends AbstractMojo {
             conflictResolver.setReplacementForPeriod(replacementForPeriod);
             conflictResolver.setReplacementForHyphen(replacementForHyphen);
             conflictResolver.setReplacementForUnderscore(replacementForUnderscore);
+            conflictResolver.setPrefixForIdentifier(prefixForIdentifier);
             YangPluginConfig yangPlugin = new YangPluginConfig();
             yangPlugin.setCodeGenDir(codeGenDir);
             yangPlugin.setConflictResolver(conflictResolver);
@@ -174,7 +181,7 @@ public class YangUtilManager extends AbstractMojo {
             addToSource(getDirectory(baseDir, genFilesDir), project, context);
 
             copyYangFilesToTarget(getYangFileInfoSet(), getDirectory(baseDir, outputDirectory), project);
-        } catch (Exception e) {
+        } catch (IOException | ParserException e) {
             String fileName = "";
             if (getCurYangFileInfo() != null) {
                 fileName = getCurYangFileInfo().getYangFileName();

@@ -103,9 +103,8 @@ public class JavaQualifiedTypeInfo
          * Current leaves holder is adding a leaf info as a attribute to the
          * current class.
          */
-        String className =
-                AttributesJavaDataType.getJavaImportClass(leaf.getDataType(), leaf.isLeafList(),
-                        leaf.getConflictResolveConfig());
+        String className = AttributesJavaDataType.getJavaImportClass(leaf.getDataType(), leaf.isLeafList(),
+                leaf.getConflictResolveConfig());
         if (className != null) {
             /*
              * Corresponding to the attribute type a class needs to be imported,
@@ -113,7 +112,7 @@ public class JavaQualifiedTypeInfo
              */
             importInfo.setClassInfo(className);
             String classPkg = AttributesJavaDataType.getJavaImportPackage(leaf.getDataType(),
-                    leaf.isLeafList(), className);
+                    leaf.isLeafList(), className, leaf.getConflictResolveConfig());
             if (classPkg == null) {
                 throw new TranslatorException("import package cannot be null when the class is used");
             }
@@ -166,11 +165,11 @@ public class JavaQualifiedTypeInfo
      * Returns the java qualified type information for the wrapper classes.
      *
      * @param referredTypesAttrInfo attribute of referred type
-     * @param confilictResolver plugin configurations
+     * @param conflictResolver plugin configurations
      * @return return the import info for this attribute
      */
     public static JavaQualifiedTypeInfo getQualifiedInfoOfFromString(JavaAttributeInfo referredTypesAttrInfo,
-            YangToJavaNamingConflictUtil confilictResolver) {
+            YangToJavaNamingConflictUtil conflictResolver) {
 
         /*
          * Get the java qualified type information for the wrapper classes and
@@ -179,9 +178,9 @@ public class JavaQualifiedTypeInfo
         JavaQualifiedTypeInfo qualifiedInfoOfFromString = new JavaQualifiedTypeInfo();
 
         qualifiedInfoOfFromString.setClassInfo(
-                getJavaImportClass(referredTypesAttrInfo.getAttributeType(), true, confilictResolver));
+                getJavaImportClass(referredTypesAttrInfo.getAttributeType(), true, conflictResolver));
         qualifiedInfoOfFromString.setPkgInfo(
-                getJavaImportPackage(referredTypesAttrInfo.getAttributeType(), true, null));
+                getJavaImportPackage(referredTypesAttrInfo.getAttributeType(), true, null, conflictResolver));
         return qualifiedInfoOfFromString;
     }
 

@@ -34,8 +34,12 @@ import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.
 import static org.onosproject.yangutils.translator.tojava.JavaAttributeInfo.getAttributeInfoForTheData;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaCodeSnippetGen.generateEnumAttributeString;
 import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGenerator.generateEnumClassFile;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getEnumJavaAttribute;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getPrefixForIdentifier;
 import static org.onosproject.yangutils.translator.tojava.utils.TempJavaCodeFragmentFilesUtils.closeFile;
 import static org.onosproject.yangutils.utils.UtilConstants.EMPTY_STRING;
+import static org.onosproject.yangutils.utils.UtilConstants.REGEX_FOR_FIRST_DIGIT;
+import static org.onosproject.yangutils.utils.UtilConstants.YANG_AUTO_PREFIX;
 import static org.onosproject.yangutils.utils.io.impl.FileSystemUtil.createPackage;
 
 /**
@@ -173,7 +177,7 @@ public class TempJavaEnumerationFragmentFiles extends TempJavaFragmentFiles {
     /**
      * Adds enum class attributes to temporary file.
      *
-     * @param curEnumInfo current YANG enum
+     * @param curEnumName current YANG enum
      * @throws IOException when fails to do IO operations.
      */
     private void addAttributesForEnumClass(String curEnumName, YangPluginConfig pluginConfig) throws IOException {
@@ -194,6 +198,16 @@ public class TempJavaEnumerationFragmentFiles extends TempJavaFragmentFiles {
         if (curNode instanceof YangEnumeration) {
             YangEnumeration enumeration = (YangEnumeration) curNode;
             for (YangEnum curEnum : enumeration.getEnumSet()) {
+                String enumName = curEnum.getNamedValue();
+                String prefixForIdentifier = null;
+                if (enumName.matches(REGEX_FOR_FIRST_DIGIT)) {
+                    prefixForIdentifier = getPrefixForIdentifier(pluginConfig.getConflictResolver());
+                    if (prefixForIdentifier != null) {
+                        curEnum.setNamedValue(prefixForIdentifier + enumName);
+                    } else {
+                        curEnum.setNamedValue(YANG_AUTO_PREFIX + enumName);
+                    }
+                }
                 setEnumValue(curEnum.getValue());
                 addToEnumStringList(curEnum.getNamedValue());
                 addToEnumSetJavaMap(curEnum.getNamedValue(), curEnum.getValue());
@@ -228,7 +242,7 @@ public class TempJavaEnumerationFragmentFiles extends TempJavaFragmentFiles {
      * @param curEnumName current enum name
      */
     private void addToEnumSetJavaMap(String curEnumName, int value) {
-        getEnumSetJavaMap().put(curEnumName.toUpperCase(), value);
+        getEnumSetJavaMap().put(getEnumJavaAttribute(curEnumName).toUpperCase(), value);
     }
 
     /**
@@ -240,7 +254,7 @@ public class TempJavaEnumerationFragmentFiles extends TempJavaFragmentFiles {
      */
     void addJavaSnippetInfoToApplicableTempFiles(String curEnumName, YangPluginConfig pluginConfig)
             throws IOException {
-        addAttributesForEnumClass(curEnumName, pluginConfig);
+        addAttributesForEnumClass(getEnumJavaAttribute(curEnumName), pluginConfig);
     }
 
     /**
@@ -279,7 +293,7 @@ public class TempJavaEnumerationFragmentFiles extends TempJavaFragmentFiles {
      * @param curEnumValue current enum value
      */
     private void addToEnumStringList(String curEnumValue) {
-        getEnumStringList().add(curEnumValue.toUpperCase());
+        getEnumStringList().add(getEnumJavaAttribute(curEnumValue).toUpperCase());
     }
 
     /**

@@ -28,7 +28,6 @@ import org.onosproject.yangutils.translator.exception.TranslatorException;
 import org.onosproject.yangutils.translator.tojava.javamodel.YangJavaType;
 import org.onosproject.yangutils.translator.tojava.utils.YangPluginConfig;
 
-import static org.onosproject.yangutils.datamodel.YangDataTypes.DERIVED;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_TYPEDEF_CLASS;
 import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_UNION_CLASS;
 import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.CONSTRUCTOR_FOR_TYPE_MASK;
@@ -212,10 +211,7 @@ public class TempJavaTypeFragmentFiles
                 YangJavaType<?> javaType = (YangJavaType<?>) yangType;
                 javaType.updateJavaQualifiedInfo(pluginConfig.getConflictResolver());
                 String typeName = javaType.getDataTypeName();
-
-                if (javaType.getDataType().equals(DERIVED)) {
                     typeName = getCamelCase(typeName, pluginConfig.getConflictResolver());
-                }
                 JavaAttributeInfo javaAttributeInfo = getAttributeInfoForTheData(
                         javaType.getJavaQualifiedInfo(),
                         typeName, javaType,

@@ -126,7 +126,8 @@ public class YangJavaModule
      */
     @Override
     public void generateCodeEntry(YangPluginConfig yangPlugin) throws TranslatorException {
-        String modulePkg = getRootPackage(getVersion(), getNameSpace().getUri(), getRevision().getRevDate());
+        String modulePkg = getRootPackage(getVersion(), getNameSpace().getUri(), getRevision().getRevDate(),
+                yangPlugin.getConflictResolver());
         try {
             generateCodeOfRootNode(this, yangPlugin, modulePkg);
         } catch (IOException e) {

@@ -139,7 +139,7 @@ public class YangJavaSubModule
     @Override
     public void generateCodeEntry(YangPluginConfig yangPlugin) throws TranslatorException {
         String subModulePkg = getRootPackage(getVersion(), getNameSpaceFromModule(getBelongsTo()),
-                getRevision().getRevDate());
+                getRevision().getRevDate(), yangPlugin.getConflictResolver());
         try {
             generateCodeOfRootNode(this, yangPlugin, subModulePkg);
         } catch (IOException e) {

@@ -41,13 +41,13 @@ public class YangJavaType<T>
     }
 
     @Override
-    public void updateJavaQualifiedInfo(YangToJavaNamingConflictUtil confilictResolver) {
+    public void updateJavaQualifiedInfo(YangToJavaNamingConflictUtil conflictResolver) {
         JavaQualifiedTypeInfo importInfo = getJavaQualifiedInfo();
 
         /*
          * Type is added as an attribute in the class.
          */
-        String className = AttributesJavaDataType.getJavaImportClass(this, false, confilictResolver);
+        String className = AttributesJavaDataType.getJavaImportClass(this, false, conflictResolver);
         if (className != null) {
             /*
              * Corresponding to the attribute type a class needs to be imported,
@@ -55,7 +55,7 @@ public class YangJavaType<T>
              */
             importInfo.setClassInfo(className);
             String classPkg = AttributesJavaDataType.getJavaImportPackage(this,
-                    false, className);
+                    false, className, conflictResolver);
             if (classPkg == null) {
                 throw new TranslatorException("import package cannot be null when the class is used");
             }

@@ -271,9 +271,11 @@ public final class AttributesJavaDataType {
      * @param yangType YANG type
      * @param isListAttr if the attribute is of list type
      * @param classInfo java import class info
+     * @param conflictResolver object of YANG to java naming conflict util
      * @return java import package
      */
-    public static String getJavaImportPackage(YangType<?> yangType, boolean isListAttr, String classInfo) {
+    public static String getJavaImportPackage(YangType<?> yangType, boolean isListAttr, String classInfo,
+            YangToJavaNamingConflictUtil conflictResolver) {
 
         YangDataTypes type = yangType.getDataType();
 
@@ -293,7 +295,7 @@ public final class AttributesJavaDataType {
                 case UINT64:
                     return JAVA_MATH;
                 case ENUMERATION:
-                    return getEnumsPackage(yangType);
+                    return getEnumsPackage(yangType, conflictResolver);
                 case DECIMAL64:
                 case BITS:
                 case BINARY:
@@ -305,12 +307,12 @@ public final class AttributesJavaDataType {
                     //TODO:IDENTITYREF
                     break;
                 case UNION:
-                    return getUnionPackage(yangType);
+                    return getUnionPackage(yangType, conflictResolver);
                 case INSTANCE_IDENTIFIER:
                     //TODO:INSTANCE_IDENTIFIER
                     break;
                 case DERIVED:
-                    return getTypDefsPackage(yangType);
+                    return getTypDefsPackage(yangType, conflictResolver);
                 default:
                     throw new TranslatorException("given data type is not supported.");
             }
@@ -321,7 +323,7 @@ public final class AttributesJavaDataType {
                 case STRING:
                     return JAVA_LANG;
                 case ENUMERATION:
-                    return getEnumsPackage(yangType);
+                    return getEnumsPackage(yangType, conflictResolver);
                 case DECIMAL64:
                 case BITS:
                 case BINARY:
@@ -335,12 +337,12 @@ public final class AttributesJavaDataType {
                 case EMPTY:
                     return JAVA_LANG;
                 case UNION:
-                    return getUnionPackage(yangType);
+                    return getUnionPackage(yangType, conflictResolver);
                 case INSTANCE_IDENTIFIER:
                     //TODO:INSTANCE_IDENTIFIER
                     break;
                 case DERIVED:
-                    return getTypDefsPackage(yangType);
+                    return getTypDefsPackage(yangType, conflictResolver);
                 default:
                     return null;
             }
@@ -352,9 +354,10 @@ public final class AttributesJavaDataType {
      * Returns java package for typedef node.
      *
      * @param type YANG type
+     * @param conflictResolver object of YANG to java naming conflict util
      * @return java package for typedef node
      */
-    private static String getTypDefsPackage(YangType<?> type) {
+    private static String getTypDefsPackage(YangType<?> type, YangToJavaNamingConflictUtil conflictResolver) {
         Object var = type.getDataTypeExtendedInfo();
         if (!(var instanceof YangDerivedInfo)) {
             throw new TranslatorException("type should have been derived.");
@@ -366,7 +369,7 @@ public final class AttributesJavaDataType {
 
         YangJavaTypeDef typedef = (YangJavaTypeDef) ((YangDerivedInfo<?>) var).getReferredTypeDef();
         if (typedef.getJavaFileInfo().getPackage() == null) {
-            return getPackageFromParent(typedef.getParent());
+            return getPackageFromParent(typedef.getParent(), conflictResolver);
         }
         return typedef.getJavaFileInfo().getPackage();
     }
@@ -375,9 +378,10 @@ public final class AttributesJavaDataType {
      * Returns java package for union node.
      *
      * @param type YANG type
+     * @param conflictResolver object of YANG to java naming conflict util
      * @return java package for union node
      */
-    private static String getUnionPackage(YangType<?> type) {
+    private static String getUnionPackage(YangType<?> type, YangToJavaNamingConflictUtil conflictResolver) {
 
         if (!(type.getDataTypeExtendedInfo() instanceof YangUnion)) {
             throw new TranslatorException("type should have been union.");
@@ -385,7 +389,7 @@ public final class AttributesJavaDataType {
 
         YangJavaUnion union = (YangJavaUnion) type.getDataTypeExtendedInfo();
         if (union.getJavaFileInfo().getPackage() == null) {
-            return getPackageFromParent(union.getParent());
+            return getPackageFromParent(union.getParent(), conflictResolver);
         }
         return union.getJavaFileInfo().getPackage();
     }
@@ -394,16 +398,17 @@ public final class AttributesJavaDataType {
      * Returns YANG enumeration's java package.
      *
      * @param type YANG type
+     * @param conflictResolver object of YANG to java naming conflict util
      * @return YANG enumeration's java package
      */
-    private static String getEnumsPackage(YangType<?> type) {
+    private static String getEnumsPackage(YangType<?> type, YangToJavaNamingConflictUtil conflictResolver) {
 
         if (!(type.getDataTypeExtendedInfo() instanceof YangEnumeration)) {
             throw new TranslatorException("type should have been enumeration.");
         }
         YangJavaEnumeration enumeration = (YangJavaEnumeration) type.getDataTypeExtendedInfo();
         if (enumeration.getJavaFileInfo().getPackage() == null) {
-            return getPackageFromParent(enumeration.getParent());
+            return getPackageFromParent(enumeration.getParent(), conflictResolver);
         }
         return enumeration.getJavaFileInfo().getPackage();
     }
@@ -412,9 +417,10 @@ public final class AttributesJavaDataType {
      * Returns package from parent node.
      *
      * @param parent parent YANG node
+     * @param conflictResolver object of YANG to java naming conflict util
      * @return java package from parent node
      */
-    private static String getPackageFromParent(YangNode parent) {
+    private static String getPackageFromParent(YangNode parent, YangToJavaNamingConflictUtil conflictResolver) {
         if (!(parent instanceof JavaFileInfoContainer)) {
             throw new TranslatorException("invalid child node is being processed.");
         }
@@ -423,13 +429,13 @@ public final class AttributesJavaDataType {
             if (parent instanceof YangJavaModule) {
                 YangJavaModule module = (YangJavaModule) parent;
                 String modulePkg = getRootPackage(module.getVersion(), module.getNameSpace().getUri(), module
-                        .getRevision().getRevDate());
+                        .getRevision().getRevDate(), conflictResolver);
                 return modulePkg + PERIOD + getCamelCase(module.getName(), null).toLowerCase();
             } else if (parent instanceof YangJavaSubModule) {
                 YangJavaSubModule submodule = (YangJavaSubModule) parent;
                 String subModulePkg = getRootPackage(submodule.getVersion(),
                         submodule.getNameSpaceFromModule(submodule.getBelongsTo()),
-                        submodule.getRevision().getRevDate());
+                        submodule.getRevision().getRevDate(), conflictResolver);
                 return subModulePkg + PERIOD + getCamelCase(submodule.getName(), null).toLowerCase();
             }
         }

@@ -53,6 +53,7 @@ import static org.onosproject.yangutils.utils.UtilConstants.NEW_LINE;
 import static org.onosproject.yangutils.utils.UtilConstants.OPEN_CURLY_BRACKET;
 import static org.onosproject.yangutils.utils.UtilConstants.PERIOD;
 import static org.onosproject.yangutils.utils.UtilConstants.PUBLIC;
+import static org.onosproject.yangutils.utils.UtilConstants.REGEX_FOR_ANY_STRING_ENDING_WITH_SERVICE;
 import static org.onosproject.yangutils.utils.UtilConstants.SERVICE;
 import static org.onosproject.yangutils.utils.UtilConstants.SPACE;
 import static org.onosproject.yangutils.utils.UtilConstants.SUBJECT;
@@ -241,24 +242,25 @@ public final class ClassDefinitionGenerator {
                 curNode = curNode.getNextSibling();
             }
         }
-        if (yangName.contains(SERVICE)) {
+        if (yangName.matches(REGEX_FOR_ANY_STRING_ENDING_WITH_SERVICE)) {
             return PUBLIC + SPACE + INTERFACE + SPACE + yangName + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;
         }
-        return PUBLIC + SPACE + CLASS + SPACE + yangName + MANAGER + SPACE + IMPLEMENTS + SPACE + yangName
-                + SERVICE + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;
+        return PUBLIC + SPACE + CLASS + SPACE + yangName + SPACE + IMPLEMENTS + SPACE
+                + yangName.substring(0, yangName.length() - 7) + SERVICE + SPACE + OPEN_CURLY_BRACKET + NEW_LINE;
     }
 
     /* Provides class definition when RPC interface needs to extends any event.*/
     private static String getRpcInterfaceDefinitionWhenItExtends(String yangName,
             JavaExtendsListHolder holder) {
 
-        if (yangName.contains(SERVICE)) {
+        if (yangName.matches(REGEX_FOR_ANY_STRING_ENDING_WITH_SERVICE)) {
             String[] strArray = yangName.split(SERVICE);
             return PUBLIC + SPACE + INTERFACE + SPACE + yangName + NEW_LINE + EIGHT_SPACE_INDENTATION
                     + EXTEND + SPACE + LISTENER_SERVICE + DIAMOND_OPEN_BRACKET + strArray[0] + EVENT_STRING + COMMA
                     + SPACE + strArray[0] + EVENT_LISTENER_STRING + DIAMOND_CLOSE_BRACKET + SPACE
                     + OPEN_CURLY_BRACKET + NEW_LINE;
         }
+        yangName = yangName.substring(0, yangName.length() - 7);
         return PUBLIC + SPACE + CLASS + SPACE + yangName + MANAGER + NEW_LINE + EIGHT_SPACE_INDENTATION
                 + EXTEND + SPACE + LISTENER_REG + DIAMOND_OPEN_BRACKET + yangName + EVENT_STRING + COMMA + SPACE
                 + yangName + EVENT_LISTENER_STRING + DIAMOND_CLOSE_BRACKET + NEW_LINE

@@ -97,6 +97,7 @@ import static org.onosproject.yangutils.utils.UtilConstants.FOUR_SPACE_INDENTATI
 import static org.onosproject.yangutils.utils.UtilConstants.IMPL;
 import static org.onosproject.yangutils.utils.UtilConstants.INT;
 import static org.onosproject.yangutils.utils.UtilConstants.LOGGER_STATEMENT;
+import static org.onosproject.yangutils.utils.UtilConstants.MANAGER;
 import static org.onosproject.yangutils.utils.UtilConstants.NEW_LINE;
 import static org.onosproject.yangutils.utils.UtilConstants.PRIVATE;
 import static org.onosproject.yangutils.utils.UtilConstants.PUBLIC;
@@ -306,7 +307,7 @@ public final class JavaFileGenerator {
 
         JavaFileInfo javaFileInfo = ((JavaFileInfoContainer) curNode).getJavaFileInfo();
 
-        String className = getCapitalCase(javaFileInfo.getJavaName());
+        String className = getCapitalCase(javaFileInfo.getJavaName()) + MANAGER;
 
         initiateJavaFileGeneration(file, GENERATE_SERVICE_AND_MANAGER, imports, curNode, className);
 

@@ -72,14 +72,13 @@ import static org.onosproject.yangutils.utils.UtilConstants.EQUAL;
 import static org.onosproject.yangutils.utils.UtilConstants.FOUR_SPACE_INDENTATION;
 import static org.onosproject.yangutils.utils.UtilConstants.IMMEDIATE;
 import static org.onosproject.yangutils.utils.UtilConstants.INT;
-import static org.onosproject.yangutils.utils.UtilConstants.MANAGER;
 import static org.onosproject.yangutils.utils.UtilConstants.NEW_LINE;
 import static org.onosproject.yangutils.utils.UtilConstants.OPEN_PARENTHESIS;
 import static org.onosproject.yangutils.utils.UtilConstants.PACKAGE;
 import static org.onosproject.yangutils.utils.UtilConstants.PERIOD;
 import static org.onosproject.yangutils.utils.UtilConstants.PRIVATE;
+import static org.onosproject.yangutils.utils.UtilConstants.REGEX_FOR_ANY_STRING_ENDING_WITH_SERVICE;
 import static org.onosproject.yangutils.utils.UtilConstants.SEMI_COLAN;
-import static org.onosproject.yangutils.utils.UtilConstants.SERVICE;
 import static org.onosproject.yangutils.utils.UtilConstants.SERVICE_ANNOTATION;
 import static org.onosproject.yangutils.utils.UtilConstants.SLASH;
 import static org.onosproject.yangutils.utils.UtilConstants.SPACE;
@@ -317,7 +316,7 @@ public final class JavaFileGeneratorUtils {
         if (type == GENERATE_EVENT_CLASS
                 || type == GENERATE_EVENT_LISTENER_INTERFACE
                 || type == GENERATE_EVENT_SUBJECT_CLASS) {
-            pkgString = parsePackageString(path + PERIOD + name, importsList);
+            pkgString = parsePackageString((path + PERIOD + name).toLowerCase(), importsList);
         } else {
             pkgString = parsePackageString(path, importsList);
         }
@@ -454,8 +453,8 @@ public final class JavaFileGeneratorUtils {
 
         YangPluginConfig pluginConfig = ((JavaFileInfoContainer) curNode).getJavaFileInfo().getPluginConfig();
         if ((genType & GENERATE_SERVICE_AND_MANAGER) != 0) {
-            if (!fileName.contains(SERVICE)) {
-                insertDataIntoJavaFile(file, getJavaDoc(RPC_MANAGER, fileName + MANAGER, false, pluginConfig));
+            if (!fileName.matches(REGEX_FOR_ANY_STRING_ENDING_WITH_SERVICE)) {
+                insertDataIntoJavaFile(file, getJavaDoc(RPC_MANAGER, fileName, false, pluginConfig));
                 insertDataIntoJavaFile(file, addComponentString());
             } else {
                 insertDataIntoJavaFile(file, getJavaDoc(javaDocType, fileName, false, pluginConfig));

@@ -75,16 +75,18 @@ public final class JavaIdentifierSyntax {
      * @param version YANG version
      * @param nameSpace name space of the module
      * @param revision revision of the module defined
-     * @return returns the root package string
+     * @param conflictResolver object of YANG to java naming conflict util
+     * @return the root package string
      */
-    public static String getRootPackage(byte version, String nameSpace, String revision) {
+    public static String getRootPackage(byte version, String nameSpace, String revision,
+            YangToJavaNamingConflictUtil conflictResolver) {
 
         String pkg;
         pkg = DEFAULT_BASE_PKG;
         pkg = pkg + PERIOD;
         pkg = pkg + getYangVersion(version);
         pkg = pkg + PERIOD;
-        pkg = pkg + getPkgFromNameSpace(nameSpace);
+        pkg = pkg + getPkgFromNameSpace(nameSpace, conflictResolver);
         pkg = pkg + PERIOD;
         pkg = pkg + getYangRevisionStr(revision);
 
@@ -144,9 +146,10 @@ public final class JavaIdentifierSyntax {
      * Returns package name from name space.
      *
      * @param nameSpace name space of YANG module
+     * @param conflictResolver object of YANG to java naming conflict util
      * @return java package name as per java rules
      */
-    private static String getPkgFromNameSpace(String nameSpace) {
+    private static String getPkgFromNameSpace(String nameSpace, YangToJavaNamingConflictUtil conflictResolver) {
 
         ArrayList<String> pkgArr = new ArrayList<String>();
         nameSpace = nameSpace.replace(QUOTES, EMPTY_STRING);
@@ -156,7 +159,7 @@ public final class JavaIdentifierSyntax {
         for (String nameSpaceString : nameSpaceArr) {
             pkgArr.add(nameSpaceString);
         }
-        return getPkgFrmArr(pkgArr);
+        return getPkgFrmArr(pkgArr, conflictResolver);
     }
 
     /**
@@ -194,17 +197,19 @@ public final class JavaIdentifierSyntax {
      * Returns the package string.
      *
      * @param pkgArr package array
+     * @param conflictResolver object of YANG to java naming conflict util
      * @return package string
      */
-    private static String getPkgFrmArr(ArrayList<String> pkgArr) {
+    private static String getPkgFrmArr(ArrayList<String> pkgArr, YangToJavaNamingConflictUtil conflictResolver) {
 
         String pkg = EMPTY_STRING;
         int size = pkgArr.size();
         int i = 0;
         for (String member : pkgArr) {
-            boolean presenceOfKeyword = JAVA_KEY_WORDS.contains(member);
+            boolean presenceOfKeyword = JAVA_KEY_WORDS.contains(member.toLowerCase());
             if (presenceOfKeyword || member.matches(REGEX_FOR_FIRST_DIGIT)) {
-                member = YANG_AUTO_PREFIX + member;
+                String prefix = getPrefixForIdentifier(conflictResolver);
+                member = prefix + member;
             }
             pkg = pkg + member;
             if (i != size - 1) {
@@ -216,20 +221,40 @@ public final class JavaIdentifierSyntax {
     }
 
     /**
-     * Returns package sub name from YANG identifier name.
+     * Prefix for adding with identifier and namespace, when it is a java keyword or starting with digits.
      *
-     * @param name YANG identifier name
-     * @return java package sub name as per java rules
+     * @param conflictResolver object of YANG to java naming conflict util
+     * @return prefix which needs to be added
      */
-    public static String getSubPkgFromName(String name) {
-
-        ArrayList<String> pkgArr = new ArrayList<String>();
-        String[] nameArr = name.split(COLAN);
+    public static String getPrefixForIdentifier(YangToJavaNamingConflictUtil conflictResolver) {
 
-        for (String nameString : nameArr) {
-            pkgArr.add(nameString);
+        String prefixForIdentifier = null;
+        if (conflictResolver != null) {
+            prefixForIdentifier = conflictResolver.getPrefixForIdentifier();
+        }
+        if (prefixForIdentifier != null) {
+            prefixForIdentifier = prefixForIdentifier.replaceAll(REGEX_WITH_ALL_SPECIAL_CHAR, COLAN);
+            String[] strArray = prefixForIdentifier.split(COLAN);
+            try {
+                if (strArray[0].isEmpty()) {
+                    List<String> stringArrangement = new ArrayList<String>();
+                    for (int i = 1; i < strArray.length; i++) {
+                        stringArrangement.add(strArray[i]);
+                    }
+                    strArray = stringArrangement.toArray(new String[stringArrangement.size()]);
+                }
+                prefixForIdentifier = strArray[0];
+                for (int j = 1; j < strArray.length; j++) {
+                    prefixForIdentifier = prefixForIdentifier + strArray[j].substring(0, 1).toUpperCase() +
+                            strArray[j].substring(1);
+                }
+            } catch (ArrayIndexOutOfBoundsException outOfBoundsException) {
+                throw new TranslatorException("The given prefix in pom.xml is invalid.");
+            }
+        } else {
+            prefixForIdentifier = YANG_AUTO_PREFIX;
         }
-        return getPkgFrmArr(pkgArr);
+        return prefixForIdentifier;
     }
 
     /**
@@ -267,16 +292,18 @@ public final class JavaIdentifierSyntax {
             }
             strArray = stringArrangement.toArray(new String[stringArrangement.size()]);
         }
-        return upperCaseConflictResolver(strArray);
+        return upperCaseConflictResolver(strArray, conflictResolver);
     }
 
     /**
-     * Resolves the conflict when input has uppercase.
+     * Resolves the conflict when input has upper case.
      *
-     * @param stringArray containing strings for uppercase conflict resolver
+     * @param stringArray containing strings for upper case conflict resolver
+     * @param conflictResolver object of YANG to java naming conflict util
      * @return camel cased string
      */
-    private static String upperCaseConflictResolver(String[] stringArray) {
+    private static String upperCaseConflictResolver(String[] stringArray,
+            YangToJavaNamingConflictUtil conflictResolver) {
 
         for (int l = 0; l < stringArray.length; l++) {
             String[] upperCaseSplitArray = stringArray[l].split(REGEX_WITH_UPPERCASE);
@@ -317,7 +344,7 @@ public final class JavaIdentifierSyntax {
             }
         }
         stringArray = result.toArray(new String[result.size()]);
-        return applyCamelCaseRule(stringArray);
+        return applyCamelCaseRule(stringArray, conflictResolver);
     }
 
     /**
@@ -325,9 +352,10 @@ public final class JavaIdentifierSyntax {
      * the letter next to a number in an array.
      *
      * @param stringArray containing strings for camel case separation
+     * @param conflictResolver object of YANG to java naming conflict util
      * @return camel case rule checked string
      */
-    private static String applyCamelCaseRule(String[] stringArray) {
+    private static String applyCamelCaseRule(String[] stringArray, YangToJavaNamingConflictUtil conflictResolver) {
 
         String ruleChecker = stringArray[0].toLowerCase();
         int i;
@@ -359,23 +387,25 @@ public final class JavaIdentifierSyntax {
                 ruleChecker = ruleChecker + stringArray[i].substring(0, 1).toUpperCase() + stringArray[i].substring(1);
             }
         }
-        String ruleCheckerWithPrefix = addPrefix(ruleChecker);
+        String ruleCheckerWithPrefix = addPrefix(ruleChecker, conflictResolver);
         return restrictConsecutiveCapitalCase(ruleCheckerWithPrefix);
     }
 
     /**
-     * Adds prefix YANG auto prefix if the string begins with digit or is a java key word.
+     * Adds prefix, if the string begins with digit or is a java key word.
      *
      * @param camelCasePrefix string for adding prefix
+     * @param conflictResolver object of YANG to java naming conflict util
      * @return prefixed camel case string
      */
-    private static String addPrefix(String camelCasePrefix) {
+    private static String addPrefix(String camelCasePrefix, YangToJavaNamingConflictUtil conflictResolver) {
 
+        String prefix = getPrefixForIdentifier(conflictResolver);
         if (camelCasePrefix.matches(REGEX_FOR_FIRST_DIGIT)) {
-            camelCasePrefix = YANG_AUTO_PREFIX + camelCasePrefix;
+            camelCasePrefix = prefix + camelCasePrefix;
         }
-        if (JAVA_KEY_WORDS.contains(camelCasePrefix.toLowerCase())) {
-            camelCasePrefix = YANG_AUTO_PREFIX + camelCasePrefix.substring(0, 1).toUpperCase()
+        if (JAVA_KEY_WORDS.contains(camelCasePrefix)) {
+            camelCasePrefix = prefix + camelCasePrefix.substring(0, 1).toUpperCase()
                     + camelCasePrefix.substring(1);
         }
         return camelCasePrefix;
@@ -444,13 +474,21 @@ public final class JavaIdentifierSyntax {
      */
     public static String getEnumJavaAttribute(String name) {
 
-        String[] strArray = name.split(HYPHEN);
+        name = name.replaceAll(REGEX_WITH_ALL_SPECIAL_CHAR, COLAN);
+        String[] strArray = name.split(COLAN);
         String output = EMPTY_STRING;
+        if (strArray[0].isEmpty()) {
+            List<String> stringArrangement = new ArrayList<String>();
+            for (int i = 1; i < strArray.length; i++) {
+                stringArrangement.add(strArray[i]);
+            }
+            strArray = stringArrangement.toArray(new String[stringArrangement.size()]);
+        }
         for (int i = 0; i < strArray.length; i++) {
-            output = output + strArray[i];
-            if (i > 0 && i < strArray.length - 1) {
+            if (i > 0 && i < strArray.length) {
                 output = output + UNDER_SCORE;
             }
+            output = output + strArray[i];
         }
         return output;
     }

@@ -37,6 +37,11 @@ public final class YangToJavaNamingConflictUtil {
     private static String replacementForHyphenInIdentifier;
 
     /**
+     * Contains the prefix value for adding with the identifier.
+     */
+    private static String prefixForIdentifier;
+
+    /**
      * Creates an object for YANG to java naming conflict util.
      */
     public YangToJavaNamingConflictUtil() {
@@ -95,4 +100,22 @@ public final class YangToJavaNamingConflictUtil {
     public String getReplacementForUnderscore() {
         return replacementForUnderscoreInIdentifier;
     }
+
+    /**
+     * Sets the prefix value for adding with the identifier.
+     *
+     * @param prefix prefix for identifier
+     */
+    public void setPrefixForIdentifier(String prefix) {
+        prefixForIdentifier = prefix;
+    }
+
+    /**
+     * Returns the prefix for identifier.
+     *
+     * @return prefix for identifier
+     */
+    public String getPrefixForIdentifier() {
+        return prefixForIdentifier;
+    }
 }

@@ -99,11 +99,11 @@ public final class RestrictionResolver {
             }
 
             if (rangeBoundary.length == MIN_RANGE_BOUNDARY) {
-                startInterval = rangeBoundary[0];
-                endInterval = rangeBoundary[0];
+                startInterval = rangeBoundary[0].trim();
+                endInterval = rangeBoundary[0].trim();
             } else {
-                startInterval = rangeBoundary[0];
-                endInterval = rangeBoundary[1];
+                startInterval = rangeBoundary[0].trim();
+                endInterval = rangeBoundary[1].trim();
             }
 
             try {
@@ -186,11 +186,11 @@ public final class RestrictionResolver {
             }
 
             if (rangeBoundary.length == MIN_RANGE_BOUNDARY) {
-                startInterval = rangeBoundary[0];
-                endInterval = rangeBoundary[0];
+                startInterval = rangeBoundary[0].trim();
+                endInterval = rangeBoundary[0].trim();
             } else {
-                startInterval = rangeBoundary[0];
-                endInterval = rangeBoundary[1];
+                startInterval = rangeBoundary[0].trim();
+                endInterval = rangeBoundary[1].trim();
             }
 
             try {

@@ -767,6 +767,11 @@ public final class UtilConstants {
     public static final String REGEX_WITH_SINGLE_CAPITAL_CASE_AND_DIGITS_SMALL_CASES = "[A-Z][0-9a-z]+";
 
     /**
+     * Static attribute for regex for any string ending with service.
+     */
+    public static final String REGEX_FOR_ANY_STRING_ENDING_WITH_SERVICE = ".+Service";
+
+    /**
      * Static attribute for class syntax.
      */
     public static final String CLASS = "class";

@@ -25,8 +25,8 @@ import YangLexer;
 package org.onosproject.yangutils.parser.antlrgencode;
 }
 
-    yangfile : moduleStatement
-             | subModuleStatement;
+    yangfile : moduleStatement EOF
+             | subModuleStatement EOF;
 
     /**
      * module-stmt         = optsep module-keyword sep identifier-arg-str

@@ -52,4 +52,34 @@ public class TreeWalkListenerTest {
         thrown.expectMessage("YANG file error : \"anyxml\" is not supported.");
         manager.getDataModel("src/test/resources/AnyxmlStatement.yang");
     }
+
+    /**
+     * Checks whether exception is thrown when extra brace is added in the EOF.
+     */
+    @Test
+    public void processFileWithExtraBrace() throws IOException, ParserException {
+        thrown.expect(ParserException.class);
+        thrown.expectMessage("mismatched input '}' expecting <EOF>");
+        manager.getDataModel("src/test/resources/ProcessFileWithExtraBrace.yang");
+    }
+
+    /**
+     * Checks whether exception is thrown when leaf is given after module ends.
+     */
+    @Test
+    public void processFileWithExtraLeaf() throws IOException, ParserException {
+        thrown.expect(ParserException.class);
+        thrown.expectMessage("mismatched input 'leaf' expecting <EOF>");
+        manager.getDataModel("src/test/resources/ProcessFileWithExtraLeaf.yang");
+    }
+
+    /**
+     * Checks whether exception is thrown when extra brace is added in between the EOF.
+     */
+    @Test
+    public void processFileWithExtraBraceInBetween() throws IOException, ParserException {
+        thrown.expect(ParserException.class);
+        thrown.expectMessage("mismatched input 'container' expecting <EOF>");
+        manager.getDataModel("src/test/resources/ProcessFileWithExtraBraceInBetween.yang");
+    }
 }

@@ -267,4 +267,36 @@ public class LengthRestrictionListenerTest {
         assertThat(((YangUint64) rangeInterval.getStartValue()).getValue(), is(BigInteger.valueOf(0)));
         assertThat(((YangUint64) rangeInterval.getEndValue()).getValue(), is(BigInteger.valueOf(100)));
     }
+
+    /**
+     * Checks whether space can be allowed when length statement is present.
+     */
+    @Test
+    public void processLengthStatementWithSpace() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/LengthStatementWithSpace.yang");
+
+        assertThat((node instanceof YangModule), is(true));
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        ListIterator<YangLeaf> leafIterator = yangNode.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        assertThat(leafInfo.getName(), is("invalid-interval"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("string"));
+        assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.STRING));
+        YangStringRestriction stringRestriction = (YangStringRestriction) leafInfo
+                .getDataType().getDataTypeExtendedInfo();
+        YangRangeRestriction lengthRestriction = stringRestriction.getLengthRestriction();
+
+        ListIterator<YangRangeInterval> lengthListIterator = lengthRestriction.getAscendingRangeIntervals()
+                .listIterator();
+
+        YangRangeInterval rangeInterval = lengthListIterator.next();
+
+        assertThat(((YangUint64) rangeInterval.getStartValue()).getValue(), is(BigInteger.valueOf(0)));
+        assertThat(((YangUint64) rangeInterval.getEndValue()).getValue(), is(BigInteger.valueOf(100)));
+    }
 }

@@ -207,4 +207,33 @@ public class RangeRestrictionListenerTest {
         assertThat(((YangInt32) rangeInterval.getEndValue()).getValue(), is(4));
         assertThat(((YangInt32) rangeInterval.getEndValue()).getValue(), is(4));
     }
+
+    /**
+     * Checks whether space can be allowed when range statement is present.
+     */
+    @Test
+    public void processRangeStatementWithSpace() throws IOException, ParserException {
+
+        YangNode node = manager.getDataModel("src/test/resources/RangeStatementWithSpace.yang");
+
+        assertThat((node instanceof YangModule), is(true));
+        assertThat(node.getNodeType(), is(YangNodeType.MODULE_NODE));
+        YangModule yangNode = (YangModule) node;
+        assertThat(yangNode.getName(), is("Test"));
+
+        ListIterator<YangLeaf> leafIterator = yangNode.getListOfLeaf().listIterator();
+        YangLeaf leafInfo = leafIterator.next();
+
+        assertThat(leafInfo.getName(), is("invalid-interval"));
+        assertThat(leafInfo.getDataType().getDataTypeName(), is("int32"));
+        assertThat(leafInfo.getDataType().getDataType(), is(YangDataTypes.INT32));
+        YangRangeRestriction rangeRestriction = (YangRangeRestriction) leafInfo
+                .getDataType().getDataTypeExtendedInfo();
+
+        ListIterator<YangRangeInterval> rangeListIterator = rangeRestriction.getAscendingRangeIntervals()
+                .listIterator();
+        YangRangeInterval rangeInterval = rangeListIterator.next();
+        assertThat(((YangInt32) rangeInterval.getStartValue()).getValue(), is(1));
+        assertThat(((YangInt32) rangeInterval.getEndValue()).getValue(), is(4));
+    }
 }

@@ -59,6 +59,7 @@ public class AttributesJavaDataTypeTest {
     private static final String CLASS_INFO5 = "Integer";
     private static final String TYPE_DEF_PKG = "target.test";
     private static String test = "";
+    private static YangToJavaNamingConflictUtil pluginConfig = null;
 
     /**
      * Unit test for private constructor.
@@ -88,7 +89,6 @@ public class AttributesJavaDataTypeTest {
      */
     @Test
     public void testgetJavaClassInfo() {
-        YangToJavaNamingConflictUtil pluginConfig = null;
         test = getJavaImportClass(getStubYangType(TYPE1), false, pluginConfig);
         assertThat(true, is(test.equals(CLASS_INFO1)));
 
@@ -125,16 +125,16 @@ public class AttributesJavaDataTypeTest {
      */
     @Test
     public void testgetJavaPkgInfo() {
-        test = getJavaImportPackage(getStubYangType(TYPE1), false, CLASS_INFO1);
+        test = getJavaImportPackage(getStubYangType(TYPE1), false, CLASS_INFO1, pluginConfig);
         assertThat(true, is(test.equals(JAVA_LANG)));
 
-        test = getJavaImportPackage(getStubYangType(TYPE2), true, CLASS_INFO5);
+        test = getJavaImportPackage(getStubYangType(TYPE2), true, CLASS_INFO5, pluginConfig);
         assertThat(true, is(test.equals(JAVA_LANG)));
 
-        test = getJavaImportPackage(getStubYangType(TYPE3), false, CLASS_INFO3);
+        test = getJavaImportPackage(getStubYangType(TYPE3), false, CLASS_INFO3, pluginConfig);
         assertThat(null, is(test));
 
-        test = getJavaImportPackage(getStubYangType(TYPE4), false, CLASS_INFO4);
+        test = getJavaImportPackage(getStubYangType(TYPE4), false, CLASS_INFO4, pluginConfig);
         assertThat(null, is(test));
     }
 
@@ -145,7 +145,7 @@ public class AttributesJavaDataTypeTest {
      */
     @Test
     public void testForTypeDef() throws DataModelException {
-        test = getJavaImportPackage(getStubExtendedInfo(getStubYangType(TYPE_DEF)), false, TYPE_DEF_PKG);
+        test = getJavaImportPackage(getStubExtendedInfo(getStubYangType(TYPE_DEF)), false, TYPE_DEF_PKG, pluginConfig);
         assertThat(true, is(test.equals(TYPE_DEF_PKG)));
     }
 

+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    leaf invalid-interval {
+        type string {
+            length "                                               0                                                                                      ..                                                                                                                                                                      100                                                                                         ";
+         }
+    }
+}

@@ -2,14 +2,14 @@ module Test {
     yang-version 1;
     namespace http://huawei.com;
     prefix Ant;
-     leaf mybits {
-         type bits {
-             bit disable-nagle;
-             bit auto-sense-speed {
-                 position 1;
-             }
-             bit Ten-Mb-only;
-             }
-         }
+    leaf mybits {
+        type bits {
+            bit disable-nagle;
+            bit auto-sense-speed {
+                position 1;
+            }
+            bit Ten-Mb-only;
+        }
     }
 }
+

@@ -2,17 +2,17 @@ module Test {
     yang-version 1;
     namespace http://huawei.com;
     prefix Ant;
-     leaf mybits {
-         type bits {
-             bit disable-nagle {
-                 position 0;
-             }
-             bit auto-sense-speed {
-                 position 1;
-             }
-             bit Ten-Mb-only {
-                 position 2;
-             }
-         }
+    leaf mybits {
+        type bits {
+            bit disable-nagle {
+                position 0;
+            }
+            bit auto-sense-speed {
+                position 1;
+            }
+            bit Ten-Mb-only {
+                position 2;
+            }
+        }
     }
 }

+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+        container food {
+            choice snack {
+                list sports-arena {
+                }
+            }
+        }
+    }
+}
+}
+}
+}

+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    import ietf-yang-types {
+        prefix "P";
+    }
+    grouping Percentage {
+        leaf hello{
+            type string;
+        }
+        leaf invalid1{
+            type string;
+        }
+        }
+        leaf invalid2{
+            type string;
+        }
+    }
+    container ospf {
+        list valid {
+            key "invalid";
+            leaf invalid{
+                type string;
+            }
+            uses Ant:FirstClass;
+            grouping FirstClass {
+                uses P:PassingClass;
+            }
+        }
+        grouping PassingClass {
+            uses Ant:Percentage;
+        }
+    }
+}

+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    container food {
+        choice snack {
+            list sports-arena {
+            }
+        }
+    }
+}
+leaf invalid {
+

+module Test {
+    yang-version 1;
+    namespace http://huawei.com;
+    prefix Ant;
+    leaf invalid-interval {
+        type int32 {
+            range "                          1                        ..                                        4 |                        10               ..                                          20                  ";
+         }
+    }
+}
+

@@ -2,12 +2,11 @@ module Test {
     yang-version 1;
     namespace http://huawei.com;
     prefix Ant;
-        container food {
-            choice snack {
-                container sports-arena {
-                    leaf pretzel {
-                        type empty;
-                    }
+    container food {
+        choice snack {
+            container sports-arena {
+                leaf pretzel {
+                    type empty;
                 }
             }
         }

@@ -2,15 +2,15 @@ module Test {
     yang-version 1;
     namespace http://huawei.com;
     prefix Ant;
-        container food {
-            choice snack {
-                list sports-arena {
-                    key "pretzel";
-                    leaf pretzel {
-                        type int32;
-                    }
+    container food {
+        choice snack {
+            list sports-arena {
+                key "pretzel";
+                leaf pretzel {
+                    type int32;
                 }
             }
         }
     }
 }
+