[ONOS-4348] Yang Bits, Binary and Decimal64
Change-Id: I8e4e54a19a8f9634cbc56a07579a1730174f53f6
diff --git a/plugin/src/main/java/org/onosproject/yangutils/parser/impl/listeners/Decimal64Listener.java b/plugin/src/main/java/org/onosproject/yangutils/parser/impl/listeners/Decimal64Listener.java
new file mode 100644
index 0000000..45f58c8
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+++ b/plugin/src/main/java/org/onosproject/yangutils/parser/impl/listeners/Decimal64Listener.java
@@ -0,0 +1,147 @@
+/*
+ * 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;
+
+/*
+ * Reference: RFC6020 and YANG ANTLR Grammar
+ *
+ * ABNF grammar as per RFC6020
+ * type-body-stmts = numerical-restrictions /
+ * decimal64-specification /
+ * string-restrictions /
+ * enum-specification /
+ * leafref-specification /
+ * identityref-specification /
+ * instance-identifier-specification /
+ * bits-specification /
+ * union-specification
+ *
+ * decimal64-specification = fraction-digits-stmt [range-stmt stmtsep]
+ *
+ * fraction-digits-stmt = fraction-digits-keyword sep
+ * fraction-digits-arg-str stmtend
+ *
+ * fraction-digits-arg-str = < a string that matches the rule
+ * fraction-digits-arg >
+ *
+ * fraction-digits-arg = ("1" ["0" / "1" / "2" / "3" / "4" /
+ * "5" / "6" / "7" / "8"])
+ * / "2" / "3" / "4" / "5" / "6" / "7" / "8" / "9"
+ *
+ * range-stmt = range-keyword sep range-arg-str optsep
+ * (";" /
+ * "{" stmtsep
+ * ;; these stmts can appear in any order
+ * [error-message-stmt stmtsep]
+ * [error-app-tag-stmt stmtsep]
+ * [description-stmt stmtsep]
+ * [reference-stmt stmtsep]
+ * "}")
+ * ANTLR grammar rule
+ *
+ * typeBodyStatements : numericalRestrictions | decimal64Specification | stringRestrictions | enumSpecification
+ * | leafrefSpecification | identityrefSpecification | instanceIdentifierSpecification
+ * | bitsSpecification | unionSpecification;
+ *
+ * decimal64Specification : fractionDigitStatement rangeStatement?;
+ *
+ * fractionDigitStatement : FRACTION_DIGITS_KEYWORD fraction STMTEND;
+ *
+ * fraction : string;
+ */
+
+import org.onosproject.yangutils.datamodel.YangDecimal64;
+import org.onosproject.yangutils.datamodel.YangRangeRestriction;
+import org.onosproject.yangutils.datamodel.YangType;
+import org.onosproject.yangutils.datamodel.exceptions.DataModelException;
+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.DECIMAL64_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_HOLDER;
+import static org.onosproject.yangutils.parser.impl.parserutils.ListenerValidation.checkStackIsNotEmpty;
+
+/**
+ * Represents listener based call back function corresponding to the "decimal64" rule
+ * defined in ANTLR grammar file for corresponding ABNF rule in RFC 6020.
+ */
+public final class Decimal64Listener {
+
+ /**
+ * Creates a new Decimal64 listener.
+ */
+ private Decimal64Listener() {
+ }
+
+ /**
+ * It is called when parser enters grammar rule (decimal64), it perform
+ * validations and updates the data model tree.
+ *
+ * @param listener listener's object
+ * @param ctx context object of the grammar rule
+ */
+ public static void processDecimal64Entry(TreeWalkListener listener,
+ GeneratedYangParser.Decimal64SpecificationContext ctx) {
+
+ // Check for stack to be non empty.
+ checkStackIsNotEmpty(listener, MISSING_HOLDER, DECIMAL64_DATA, "", ENTRY);
+
+ Parsable tmpNode = listener.getParsedDataStack().peek();
+ if (tmpNode instanceof YangType) {
+ YangType<YangDecimal64<YangRangeRestriction>> typeNode =
+ (YangType<YangDecimal64<YangRangeRestriction>>) tmpNode;
+ YangDecimal64 decimal64Node = new YangDecimal64();
+ typeNode.setDataTypeExtendedInfo(decimal64Node);
+ } else {
+ throw new ParserException(constructListenerErrorMessage(INVALID_HOLDER, DECIMAL64_DATA, "", ENTRY));
+ }
+ }
+
+ /**
+ * Performs validation and updates the data model tree.
+ * It is called when parser exits from grammar rule (decimal64).
+ *
+ * @param listener listener's object
+ * @param ctx context object of the grammar rule
+ */
+ public static void processDecimal64Exit(TreeWalkListener listener,
+ GeneratedYangParser.Decimal64SpecificationContext ctx) {
+
+ // Check for stack to be non empty.
+ checkStackIsNotEmpty(listener, MISSING_HOLDER, DECIMAL64_DATA, "", EXIT);
+
+ Parsable tmpNode = listener.getParsedDataStack().peek();
+ if (tmpNode instanceof YangType) {
+ YangType<YangDecimal64<YangRangeRestriction>> typeNode =
+ (YangType<YangDecimal64<YangRangeRestriction>>) tmpNode;
+ YangDecimal64<YangRangeRestriction> decimal64Node = typeNode.getDataTypeExtendedInfo();
+ try {
+ decimal64Node.validateRange();
+ } catch (DataModelException e) {
+ throw new ParserException(e);
+ }
+ } else {
+ throw new ParserException(constructListenerErrorMessage(INVALID_HOLDER, DECIMAL64_DATA, "", EXIT));
+ }
+ }
+}
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