config ang key validation and UT for the same

Change-Id: I507740fc9da3f3da5fb3c88a7414f87db6251c5b
diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/ContainerListener.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/ContainerListener.java
index 08be582f..2325be3 100644
--- a/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/ContainerListener.java
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/ContainerListener.java
@@ -27,6 +27,7 @@
 import org.onosproject.yangutils.parser.exceptions.ParserException;
 import org.onosproject.yangutils.parser.impl.TreeWalkListener;
 import org.onosproject.yangutils.parser.impl.YangUtilsParserManager;
+import org.onosproject.yangutils.parser.impl.parserutils.ListenerValidation;
 
 import static org.onosproject.yangutils.parser.ParsableDataType.CONTAINER_DATA;
 import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation.ENTRY;
@@ -94,6 +95,7 @@
     public static void processContainerEntry(TreeWalkListener listener,
                                              GeneratedYangParser.ContainerStatementContext ctx) {
 
+        YangNode parentNode;
         // Check for stack to be non empty.
         checkStackIsNotEmpty(listener, MISSING_HOLDER, CONTAINER_DATA, ctx.IDENTIFIER().getText(), ENTRY);
 
@@ -105,8 +107,14 @@
         YangContainer container = new YangContainer();
         container.setName(ctx.IDENTIFIER().getText());
 
-        Parsable curData = listener.getParsedDataStack().peek();
+        /* If "config" is not specified, the default is the same as the parent
+           schema node's "config" value. */
+        if (ctx.configStatement().isEmpty()) {
+            boolean parentConfig = ListenerValidation.getParentNodeConfig(listener);
+            container.setConfig(parentConfig);
+        }
 
+        Parsable curData = listener.getParsedDataStack().peek();
         if ((curData instanceof YangModule) || (curData instanceof YangContainer)
                 || (curData instanceof YangList)) {
             YangNode curNode = (YangNode) curData;
@@ -137,6 +145,13 @@
         checkStackIsNotEmpty(listener, MISSING_HOLDER, CONTAINER_DATA, ctx.IDENTIFIER().getText(), EXIT);
 
         if (listener.getParsedDataStack().peek() instanceof YangContainer) {
+            YangContainer yangContainer = (YangContainer) listener.getParsedDataStack().peek();
+            try {
+                yangContainer.validateDataOnExit();
+            } catch (DataModelException e) {
+                throw new ParserException(constructExtendedListenerErrorMessage(UNHANDLED_PARSED_DATA,
+                        CONTAINER_DATA, ctx.IDENTIFIER().getText(), EXIT, e.getMessage()));
+            }
             listener.getParsedDataStack().pop();
         } else {
             throw new ParserException(constructListenerErrorMessage(MISSING_CURRENT_HOLDER, CONTAINER_DATA,
diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/KeyListener.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/KeyListener.java
index 32677a5..268d535 100644
--- a/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/KeyListener.java
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/KeyListener.java
@@ -17,15 +17,20 @@
 package org.onosproject.yangutils.parser.impl.listeners;
 
 import org.onosproject.yangutils.datamodel.YangList;
+import org.onosproject.yangutils.datamodel.exceptions.DataModelException;
 import org.onosproject.yangutils.parser.Parsable;
-import org.onosproject.yangutils.parser.ParsableDataType;
 import org.onosproject.yangutils.parser.antlrgencode.GeneratedYangParser;
 import org.onosproject.yangutils.parser.exceptions.ParserException;
 import org.onosproject.yangutils.parser.impl.TreeWalkListener;
-import org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation;
-import org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorMessageConstruction;
-import org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType;
-import org.onosproject.yangutils.parser.impl.parserutils.ListenerValidation;
+
+import static org.onosproject.yangutils.parser.ParsableDataType.KEY_DATA;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation.ENTRY;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorMessageConstruction.constructListenerErrorMessage;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorMessageConstruction.constructExtendedListenerErrorMessage;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.INVALID_HOLDER;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.UNHANDLED_PARSED_DATA;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.MISSING_HOLDER;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerValidation.checkStackIsNotEmpty;
 
 /*
  * Reference: RFC6020 and YANG ANTLR Grammar
@@ -61,9 +66,7 @@
                                          GeneratedYangParser.KeyStatementContext ctx) {
 
         // Check for stack to be non empty.
-        ListenerValidation.checkStackIsNotEmpty(listener, ListenerErrorType.MISSING_HOLDER,
-                ParsableDataType.KEY_DATA, String.valueOf(ctx.string().getText()),
-                ListenerErrorLocation.ENTRY);
+        checkStackIsNotEmpty(listener, MISSING_HOLDER, KEY_DATA, ctx.string().getText(), ENTRY);
 
         Parsable tmpData = listener.getParsedDataStack().peek();
         if (listener.getParsedDataStack().peek() instanceof YangList) {
@@ -72,17 +75,24 @@
             if (tmpKeyValue.contains(" ")) {
                 String[] keyValues = tmpKeyValue.split(" ");
                 for (String keyValue : keyValues) {
-                    yangList.addKey(keyValue);
+                    try {
+                        yangList.addKey(keyValue);
+                    } catch (DataModelException e) {
+                        throw new ParserException(constructExtendedListenerErrorMessage(UNHANDLED_PARSED_DATA, KEY_DATA,
+                                ctx.string().getText(), ENTRY, e.getMessage()));
+                    }
                 }
             } else {
-                yangList.addKey(tmpKeyValue);
+                try {
+                    yangList.addKey(tmpKeyValue);
+                } catch (DataModelException e) {
+                    throw new ParserException(constructExtendedListenerErrorMessage(UNHANDLED_PARSED_DATA, KEY_DATA,
+                            ctx.string().getText(), ENTRY, e.getMessage()));
+                }
             }
         } else {
-            throw new ParserException(ListenerErrorMessageConstruction
-                    .constructListenerErrorMessage(ListenerErrorType.INVALID_HOLDER,
-                            ParsableDataType.KEY_DATA,
-                            String.valueOf(ctx.string().getText()),
-                            ListenerErrorLocation.ENTRY));
+            throw new ParserException(constructListenerErrorMessage(INVALID_HOLDER, KEY_DATA, ctx.string().getText(),
+                            ENTRY));
         }
     }
 }
\ No newline at end of file
diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/ListListener.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/ListListener.java
index 82d69cb..2319b8e 100644
--- a/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/ListListener.java
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/ListListener.java
@@ -17,6 +17,8 @@
 package org.onosproject.yangutils.parser.impl.listeners;
 
 import org.onosproject.yangutils.datamodel.YangList;
+import org.onosproject.yangutils.datamodel.YangContainer;
+import org.onosproject.yangutils.datamodel.YangModule;
 import org.onosproject.yangutils.datamodel.YangNode;
 import org.onosproject.yangutils.datamodel.YangNodeType;
 import org.onosproject.yangutils.datamodel.exceptions.DataModelException;
@@ -26,11 +28,20 @@
 import org.onosproject.yangutils.parser.exceptions.ParserException;
 import org.onosproject.yangutils.parser.impl.TreeWalkListener;
 import org.onosproject.yangutils.parser.impl.YangUtilsParserManager;
-import org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation;
-import org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorMessageConstruction;
-import org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType;
 import org.onosproject.yangutils.parser.impl.parserutils.ListenerValidation;
 
+import static org.onosproject.yangutils.parser.ParsableDataType.LIST_DATA;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation.ENTRY;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorLocation.EXIT;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorMessageConstruction.constructExtendedListenerErrorMessage;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorMessageConstruction.constructListenerErrorMessage;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.MISSING_CURRENT_HOLDER;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.MISSING_HOLDER;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.INVALID_HOLDER;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.UNHANDLED_PARSED_DATA;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.INVALID_CARDINALITY;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerValidation.checkStackIsNotEmpty;
+
 /*
  * Reference: RFC6020 and YANG ANTLR Grammar
  *
@@ -89,40 +100,37 @@
 
         YangNode curNode;
 
-        ListenerValidation.checkStackIsNotEmpty(listener, ListenerErrorType.MISSING_HOLDER,
-                ParsableDataType.LIST_DATA, String.valueOf(ctx.IDENTIFIER().getText()),
-                ListenerErrorLocation.ENTRY);
+        checkStackIsNotEmpty(listener, MISSING_HOLDER, LIST_DATA, ctx.IDENTIFIER().getText(), ENTRY);
 
         boolean result = validateSubStatementsCardinality(ctx);
         if (!result) {
-            throw new ParserException(ListenerErrorMessageConstruction
-                    .constructListenerErrorMessage(ListenerErrorType.INVALID_CARDINALITY,
-                            yangConstruct, "", ListenerErrorLocation.ENTRY));
+            throw new ParserException(constructListenerErrorMessage(INVALID_CARDINALITY, yangConstruct, "", ENTRY));
         }
 
         YangList yangList = new YangList(YangNodeType.LIST_NODE);
         yangList.setName(ctx.IDENTIFIER().getText());
 
+        /* If "config" is not specified, the default is the same as the parent
+           schema node's "config" value. */
+        if (ctx.configStatement().isEmpty()) {
+            boolean parentConfig = ListenerValidation.getParentNodeConfig(listener);
+            yangList.setConfig(parentConfig);
+        }
+
         Parsable curData = listener.getParsedDataStack().peek();
-        if (curData instanceof YangNode) {
+        if ((curData instanceof YangModule) || (curData instanceof YangContainer)
+                || (curData instanceof YangList)) {
             curNode = (YangNode) curData;
             try {
                 curNode.addChild(yangList);
             } catch (DataModelException e) {
-                throw new ParserException(ListenerErrorMessageConstruction
-                        .constructExtendedListenerErrorMessage(ListenerErrorType.UNHANDLED_PARSED_DATA,
-                                ParsableDataType.LIST_DATA,
-                                String.valueOf(ctx.IDENTIFIER().getText()),
-                                ListenerErrorLocation.ENTRY,
-                                e.getMessage()));
+                throw new ParserException(constructExtendedListenerErrorMessage(UNHANDLED_PARSED_DATA,
+                        LIST_DATA, ctx.IDENTIFIER().getText(), ENTRY, e.getMessage()));
             }
             listener.getParsedDataStack().push(yangList);
         } else {
-            throw new ParserException(ListenerErrorMessageConstruction
-                    .constructListenerErrorMessage(ListenerErrorType.INVALID_HOLDER,
-                            ParsableDataType.LIST_DATA,
-                            String.valueOf(ctx.IDENTIFIER().getText()),
-                            ListenerErrorLocation.ENTRY));
+            throw new ParserException(constructListenerErrorMessage(INVALID_HOLDER, LIST_DATA,
+                            ctx.IDENTIFIER().getText(), ENTRY));
         }
     }
 
@@ -136,18 +144,20 @@
     public static void processListExit(TreeWalkListener listener,
                                             GeneratedYangParser.ListStatementContext ctx) {
 
-        ListenerValidation.checkStackIsNotEmpty(listener, ListenerErrorType.MISSING_HOLDER,
-                ParsableDataType.LIST_DATA, String.valueOf(ctx.IDENTIFIER().getText()),
-                ListenerErrorLocation.EXIT);
+        checkStackIsNotEmpty(listener, MISSING_HOLDER, LIST_DATA, ctx.IDENTIFIER().getText(), EXIT);
 
         if (listener.getParsedDataStack().peek() instanceof YangList) {
+            YangList yangList = (YangList) listener.getParsedDataStack().peek();
+            try {
+                yangList.validateDataOnExit();
+            } catch (DataModelException e) {
+                throw new ParserException(constructExtendedListenerErrorMessage(UNHANDLED_PARSED_DATA,
+                        LIST_DATA, ctx.IDENTIFIER().getText(), EXIT, e.getMessage()));
+            }
             listener.getParsedDataStack().pop();
         } else {
-            throw new ParserException(ListenerErrorMessageConstruction
-                    .constructListenerErrorMessage(ListenerErrorType.INVALID_HOLDER,
-                            ParsableDataType.LIST_DATA,
-                            String.valueOf(ctx.IDENTIFIER().getText()),
-                            ListenerErrorLocation.EXIT));
+            throw new ParserException(constructListenerErrorMessage(MISSING_CURRENT_HOLDER, LIST_DATA,
+                            ctx.IDENTIFIER().getText(), EXIT));
         }
     }
 
@@ -157,7 +167,7 @@
      * @param ctx context object of the grammar rule.
      * @return true/false validation success or failure.
      */
-    public static boolean validateSubStatementsCardinality(GeneratedYangParser.ListStatementContext ctx) {
+    private static boolean validateSubStatementsCardinality(GeneratedYangParser.ListStatementContext ctx) {
 
         if ((!ctx.keyStatement().isEmpty())
                 && (ctx.keyStatement().size() != YangUtilsParserManager.SUB_STATEMENT_CARDINALITY)) {
diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/parserutils/ListenerValidation.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/parserutils/ListenerValidation.java
index 226a530..26e4907 100644
--- a/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/parserutils/ListenerValidation.java
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/parserutils/ListenerValidation.java
@@ -16,6 +16,10 @@
 
 package org.onosproject.yangutils.parser.impl.parserutils;
 
+import org.onosproject.yangutils.datamodel.YangContainer;
+import org.onosproject.yangutils.datamodel.YangList;
+import org.onosproject.yangutils.datamodel.YangNode;
+import org.onosproject.yangutils.parser.Parsable;
 import org.onosproject.yangutils.parser.ParsableDataType;
 import org.onosproject.yangutils.parser.exceptions.ParserException;
 import org.onosproject.yangutils.parser.impl.TreeWalkListener;
@@ -83,4 +87,25 @@
             throw new ParserException(message);
         }
     }
+
+    /**
+     * Returns parent node config value, if top node does not specify a config statement
+     * then default value true is returned.
+     *
+     * @param listener listener's object.
+     * @return true/false parent's config value.
+     */
+    public static boolean getParentNodeConfig(TreeWalkListener listener) {
+        YangNode parentNode;
+        Parsable curData = listener.getParsedDataStack().peek();
+        if (curData instanceof YangNode) {
+            parentNode = ((YangNode) curData).getParent();
+            if (parentNode instanceof YangContainer) {
+                return ((YangContainer) parentNode).isConfig();
+            } else if (parentNode instanceof YangList) {
+                return ((YangList) parentNode).isConfig();
+            }
+        }
+        return true;
+    }
 }