| /* |
| * 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 |
| * decimal64-specification = fraction-digits-stmt |
| * |
| * 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" |
| * |
| * ANTLR grammar rule |
| * decimal64Specification : 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.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.FRACTION_DIGITS_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.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 "fraction-digits" |
| * rule defined in ANTLR grammar file for corresponding ABNF rule in RFC 6020. |
| */ |
| public final class FractionDigitsListener { |
| |
| /** |
| * Creates a new bit listener. |
| */ |
| private FractionDigitsListener() { |
| } |
| |
| /** |
| * It is called when parser enters grammar rule (fraction-digits), 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 processFractionDigitsEntry(TreeWalkListener listener, |
| GeneratedYangParser.FractionDigitStatementContext ctx) { |
| |
| // Check for stack to be non empty. |
| checkStackIsNotEmpty(listener, MISSING_HOLDER, FRACTION_DIGITS_DATA, ctx.fraction().getText(), ENTRY); |
| |
| int value = getValidFractionDigits(ctx); |
| |
| Parsable tmpNode = listener.getParsedDataStack().peek(); |
| if (tmpNode instanceof YangType) { |
| YangType<YangDecimal64<YangRangeRestriction>> typeNode = |
| (YangType<YangDecimal64<YangRangeRestriction>>) tmpNode; |
| YangDecimal64 decimal64Node = typeNode.getDataTypeExtendedInfo(); |
| decimal64Node.setFractionDigit(value); |
| } else { |
| throw new ParserException(constructListenerErrorMessage(INVALID_HOLDER, FRACTION_DIGITS_DATA, |
| ctx.fraction().getText(), ENTRY)); |
| } |
| } |
| |
| /** |
| * Validate fraction digits. |
| * |
| * @param ctx context object of the grammar rule |
| * @return validated fraction-digits |
| */ |
| public static int getValidFractionDigits(GeneratedYangParser.FractionDigitStatementContext ctx) { |
| String value = ctx.fraction().getText().trim(); |
| ParserException parserException; |
| |
| int fractionDigits = Integer.parseInt(value); |
| if ((fractionDigits >= YangDecimal64.MIN_FRACTION_DIGITS_VALUE) && |
| (fractionDigits <= YangDecimal64.MAX_FRACTION_DIGITS_VALUE)) { |
| return fractionDigits; |
| } else { |
| parserException = |
| new ParserException("YANG file error : fraction-digits value should be between 1 and 18."); |
| parserException.setLine(ctx.getStart().getLine()); |
| parserException.setCharPosition(ctx.getStart().getCharPositionInLine()); |
| throw parserException; |
| } |
| } |
| } |