[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/LengthRestrictionListener.java b/utils/yangutils/plugin/src/main/java/org/onosproject/yangutils/parser/impl/listeners/LengthRestrictionListener.java
new file mode 100644
index 0000000..bf8c6b0
--- /dev/null
+++ b/utils/yangutils/plugin/src/main/java/org/onosproject/yangutils/parser/impl/listeners/LengthRestrictionListener.java
@@ -0,0 +1,179 @@
+/*
+ * 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.YangDerivedInfo;
+import org.onosproject.yangutils.datamodel.YangRangeRestriction;
+import org.onosproject.yangutils.datamodel.YangStringRestriction;
+import org.onosproject.yangutils.datamodel.YangType;
+import org.onosproject.yangutils.datamodel.exceptions.DataModelException;
+import org.onosproject.yangutils.datamodel.utils.Parsable;
+import org.onosproject.yangutils.datamodel.utils.YangConstructType;
+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.YangDataTypes.BINARY;
+import static org.onosproject.yangutils.datamodel.YangDataTypes.DERIVED;
+import static org.onosproject.yangutils.datamodel.YangDataTypes.STRING;
+import static org.onosproject.yangutils.datamodel.utils.RestrictionResolver.processLengthRestriction;
+import static org.onosproject.yangutils.datamodel.utils.YangConstructType.LENGTH_DATA;
+import static org.onosproject.yangutils.datamodel.utils.YangConstructType.TYPE_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.ListenerValidation.checkStackIsNotEmpty;
+
+/*
+ * Reference: RFC6020 and YANG ANTLR Grammar
+ *
+ * ABNF grammar as per RFC6020
+ * length-stmt = length-keyword sep length-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
+ * lengthStatement : LENGTH_KEYWORD length
+ * (STMTEND | LEFT_CURLY_BRACE commonStatements RIGHT_CURLY_BRACE);
+ */
+
+/**
+ * Represents listener based call back function corresponding to the "length"
+ * rule defined in ANTLR grammar file for corresponding ABNF rule in RFC 6020.
+ */
+public final class LengthRestrictionListener {
+
+ /**
+ * Creates a new length restriction listener.
+ */
+ private LengthRestrictionListener() {
+ }
+
+ /**
+ * It is called when parser receives an input matching the grammar
+ * rule (length), performs validation and updates the data model
+ * tree.
+ *
+ * @param listener listener's object
+ * @param ctx context object of the grammar rule
+ */
+ public static void processLengthRestrictionEntry(TreeWalkListener listener,
+ GeneratedYangParser.LengthStatementContext ctx) {
+
+ // Check for stack to be non empty.
+ checkStackIsNotEmpty(listener, MISSING_HOLDER, LENGTH_DATA, ctx.length().getText(), ENTRY);
+
+ Parsable tmpData = listener.getParsedDataStack().peek();
+ if (tmpData.getYangConstructType() == TYPE_DATA) {
+ YangType type = (YangType) tmpData;
+ setLengthRestriction(listener, type, ctx);
+ } else {
+ throw new ParserException(constructListenerErrorMessage(INVALID_HOLDER, LENGTH_DATA,
+ ctx.length().getText(), ENTRY));
+ }
+ }
+
+ /**
+ * Sets the length restriction to type.
+ *
+ * @param listener listener's object
+ * @param type Yang type for which length restriction to be set
+ * @param ctx context object of the grammar rule
+ */
+ private static void setLengthRestriction(TreeWalkListener listener, YangType type,
+ GeneratedYangParser.LengthStatementContext ctx) {
+
+ if (type.getDataType() == DERIVED) {
+ ((YangDerivedInfo<YangRangeRestriction>) type.getDataTypeExtendedInfo())
+ .setLengthRestrictionString(ctx.length().getText());
+ ((YangDerivedInfo<YangRangeRestriction>) type.getDataTypeExtendedInfo())
+ .setLineNumber(ctx.getStart().getLine());
+ ((YangDerivedInfo<YangRangeRestriction>) type.getDataTypeExtendedInfo())
+ .setCharPosition(ctx.getStart().getCharPositionInLine());
+ return;
+ }
+
+ if (type.getDataType() != STRING && type.getDataType() != BINARY) {
+ ParserException parserException = new ParserException("YANG file error : " +
+ YangConstructType.getYangConstructType(LENGTH_DATA) + " name " + ctx.length().getText() +
+ " can be used to restrict the built-in type string/binary or types derived from string/binary.");
+ parserException.setLine(ctx.getStart().getLine());
+ parserException.setCharPosition(ctx.getStart().getCharPositionInLine());
+ throw parserException;
+ }
+
+ YangRangeRestriction lengthRestriction = null;
+ try {
+ lengthRestriction = processLengthRestriction(null, ctx.getStart().getLine(),
+ ctx.getStart().getCharPositionInLine(), false, ctx.length().getText());
+ } catch (DataModelException e) {
+ ParserException parserException = new ParserException(e.getMessage());
+ parserException.setCharPosition(e.getCharPositionInLine());
+ parserException.setLine(e.getLineNumber());
+ throw parserException;
+ }
+
+ if (type.getDataType() == STRING) {
+ YangStringRestriction stringRestriction = (YangStringRestriction) type.getDataTypeExtendedInfo();
+ if (stringRestriction == null) {
+ stringRestriction = new YangStringRestriction();
+ type.setDataTypeExtendedInfo(stringRestriction);
+ }
+
+ stringRestriction.setLengthRestriction(lengthRestriction);
+ } else {
+ type.setDataTypeExtendedInfo(lengthRestriction);
+ }
+
+ listener.getParsedDataStack().push(lengthRestriction);
+ }
+
+ /**
+ * Performs validation and updates the data model tree.
+ * It is called when parser exits from grammar rule (length).
+ *
+ * @param listener listener's object
+ * @param ctx context object of the grammar rule
+ */
+ public static void processLengthRestrictionExit(TreeWalkListener listener,
+ GeneratedYangParser.LengthStatementContext ctx) {
+
+ // Check for stack to be non empty.
+ checkStackIsNotEmpty(listener, MISSING_HOLDER, LENGTH_DATA, ctx.length().getText(), EXIT);
+
+ Parsable tmpData = listener.getParsedDataStack().peek();
+ if (tmpData instanceof YangRangeRestriction) {
+ listener.getParsedDataStack().pop();
+ } else if (tmpData instanceof YangType
+ && ((YangType) tmpData).getDataType() == DERIVED) {
+ // TODO : need to handle in linker
+ } else {
+ throw new ParserException(constructListenerErrorMessage(MISSING_CURRENT_HOLDER, LENGTH_DATA,
+ ctx.length().getText(), EXIT));
+ }
+ }
+}