[ONOS-4350] Inter Jar dependency implementation and code restructuring.
Change-Id: Iacac75e4187aed93ce1754c170a9c19707e5b8c3
diff --git a/utils/yangutils/plugin/src/main/java/org/onosproject/yangutils/parser/impl/listeners/BelongsToListener.java b/utils/yangutils/plugin/src/main/java/org/onosproject/yangutils/parser/impl/listeners/BelongsToListener.java
new file mode 100644
index 0000000..ab12d46
--- /dev/null
+++ b/utils/yangutils/plugin/src/main/java/org/onosproject/yangutils/parser/impl/listeners/BelongsToListener.java
@@ -0,0 +1,141 @@
+/*
+ * Copyright 2016-present 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.parser.impl.listeners;
+
+import org.onosproject.yangutils.datamodel.YangBelongsTo;
+import org.onosproject.yangutils.datamodel.YangSubModule;
+import org.onosproject.yangutils.datamodel.utils.Parsable;
+import org.onosproject.yangutils.parser.antlrgencode.GeneratedYangParser;
+import org.onosproject.yangutils.parser.exceptions.ParserException;
+import org.onosproject.yangutils.parser.impl.TreeWalkListener;
+
+import static org.onosproject.yangutils.datamodel.utils.YangConstructType.BELONGS_TO_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.constructListenerErrorMessage;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerErrorType.INVALID_HOLDER;
+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.ListenerUtil.getValidIdentifier;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerValidation.checkStackIsNotEmpty;
+
+/*
+ * Reference: RFC6020 and YANG ANTLR Grammar
+ *
+ * ABNF grammar as per RFC6020
+ * submodule-header-stmts =
+ * ;; these stmts can appear in any order
+ * [yang-version-stmt stmtsep]
+ * belongs-to-stmt stmtsep
+ *
+ * belongs-to-stmt = belongs-to-keyword sep identifier-arg-str
+ * optsep
+ * "{" stmtsep
+ * prefix-stmt stmtsep
+ * "}"
+ *
+ * ANTLR grammar rule
+ * submodule_header_statement : yang_version_stmt? belongs_to_stmt
+ * | belongs_to_stmt yang_version_stmt?
+ * ;
+ * belongs_to_stmt : BELONGS_TO_KEYWORD identifier LEFT_CURLY_BRACE belongs_to_stmt_body RIGHT_CURLY_BRACE;
+ * belongs_to_stmt_body : prefix_stmt;
+ */
+
+/**
+ * Represents listener based call back function corresponding to the
+ * "belongs to" rule defined in ANTLR grammar file for corresponding ABNF rule
+ * in RFC 6020.
+ */
+public final class BelongsToListener {
+
+ /**
+ * Creates a new belongto listener.
+ */
+ private BelongsToListener() {
+ }
+
+ /**
+ * It is called when parser receives an input matching the grammar rule
+ * (belongsto), perform validations and update the data model tree.
+ *
+ * @param listener Listener's object
+ * @param ctx context object of the grammar rule
+ */
+ public static void processBelongsToEntry(TreeWalkListener listener,
+ GeneratedYangParser.BelongstoStatementContext ctx) {
+
+ // Check for stack to be non empty.
+ checkStackIsNotEmpty(listener, MISSING_HOLDER, BELONGS_TO_DATA, ctx.identifier().getText(),
+ ENTRY);
+
+ String identifier = getValidIdentifier(ctx.identifier().getText(), BELONGS_TO_DATA, ctx);
+
+ YangBelongsTo belongstoNode = new YangBelongsTo();
+ belongstoNode.setBelongsToModuleName(identifier);
+
+ // Set the line number and character position in line for the belongs to.
+ int errorLine = ctx.getStart().getLine();
+ int errorPosition = ctx.getStart().getCharPositionInLine();
+ belongstoNode.setLineNumber(errorLine);
+ belongstoNode.setCharPosition(errorPosition);
+
+ // Push belongsto into the stack.
+ listener.getParsedDataStack().push(belongstoNode);
+ }
+
+ /**
+ * It is called when parser exits from grammar rule (belongsto), it perform
+ * validations and update the data model tree.
+ *
+ * @param listener Listener's object
+ * @param ctx context object of the grammar rule
+ */
+ public static void processBelongsToExit(TreeWalkListener listener,
+ GeneratedYangParser.BelongstoStatementContext ctx) {
+
+ // Check for stack to be non empty.
+ checkStackIsNotEmpty(listener, MISSING_HOLDER, BELONGS_TO_DATA, ctx.identifier().getText(),
+ EXIT);
+
+ Parsable tmpBelongstoNode = listener.getParsedDataStack().peek();
+ if (tmpBelongstoNode instanceof YangBelongsTo) {
+ listener.getParsedDataStack().pop();
+
+ // Check for stack to be empty.
+ checkStackIsNotEmpty(listener, MISSING_HOLDER, BELONGS_TO_DATA,
+ ctx.identifier().getText(), EXIT);
+
+ Parsable tmpNode = listener.getParsedDataStack().peek();
+ switch (tmpNode.getYangConstructType()) {
+ case SUB_MODULE_DATA: {
+ YangSubModule subModule = (YangSubModule) tmpNode;
+ subModule.setBelongsTo((YangBelongsTo) tmpBelongstoNode);
+ subModule.setPrefix(subModule.getBelongsTo().getPrefix());
+ break;
+ }
+ default:
+ throw new ParserException(constructListenerErrorMessage(INVALID_HOLDER, BELONGS_TO_DATA,
+ ctx.identifier().getText(),
+ EXIT));
+ }
+ } else {
+ throw new ParserException(constructListenerErrorMessage(MISSING_CURRENT_HOLDER, BELONGS_TO_DATA,
+ ctx.identifier().getText(), EXIT));
+ }
+ }
+}