2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2022 Nordix Foundation
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.cps.cpspath.parser;
23 import lombok.AccessLevel;
25 import lombok.NoArgsConstructor;
27 import org.antlr.v4.runtime.BaseErrorListener;
28 import org.antlr.v4.runtime.CharStream;
29 import org.antlr.v4.runtime.CharStreams;
30 import org.antlr.v4.runtime.CommonTokenStream;
31 import org.antlr.v4.runtime.RecognitionException;
32 import org.antlr.v4.runtime.Recognizer;
33 import org.onap.cps.cpspath.parser.antlr4.CpsPathLexer;
34 import org.onap.cps.cpspath.parser.antlr4.CpsPathParser;
38 @NoArgsConstructor(access = AccessLevel.PACKAGE)
39 public class CpsPathUtil {
42 * Returns a normalized xpath path query.
44 * @param xpathSource xpath
45 * @return a normalized xpath String.
47 public static String getNormalizedXpath(final String xpathSource) {
48 final CpsPathBuilder cpsPathBuilder = getCpsPathBuilder(xpathSource);
49 return cpsPathBuilder.build().getNormalizedXpath();
53 * Returns a cps path query.
55 * @param cpsPathSource cps path
56 * @return a CpsPathQuery object.
59 public static CpsPathQuery getCpsPathQuery(final String cpsPathSource) {
60 final CpsPathBuilder cpsPathBuilder = getCpsPathBuilder(cpsPathSource);
61 return cpsPathBuilder.build();
64 private static CpsPathBuilder getCpsPathBuilder(final String cpsPathSource) {
65 final CharStream inputStream = CharStreams.fromString(cpsPathSource);
66 final CpsPathLexer cpsPathLexer = new CpsPathLexer(inputStream);
67 final CpsPathParser cpsPathParser = new CpsPathParser(new CommonTokenStream(cpsPathLexer));
68 cpsPathParser.addErrorListener(new BaseErrorListener() {
70 public void syntaxError(final Recognizer<?, ?> recognizer, final Object offendingSymbol, final int line,
71 final int charPositionInLine, final String msg, final RecognitionException e) {
72 throw new PathParsingException("failed to parse at line " + line + " due to " + msg,
73 e == null ? "" : e.getMessage());
76 final CpsPathBuilder cpsPathBuilder = new CpsPathBuilder();
77 cpsPathParser.addParseListener(cpsPathBuilder);
78 cpsPathParser.cpsPath();
79 return cpsPathBuilder;