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 static org.onap.cps.cpspath.parser.CpsPathPrefixType.ABSOLUTE;
25 import java.util.List;
26 import lombok.AccessLevel;
28 import lombok.NoArgsConstructor;
30 import org.antlr.v4.runtime.BaseErrorListener;
31 import org.antlr.v4.runtime.CharStream;
32 import org.antlr.v4.runtime.CharStreams;
33 import org.antlr.v4.runtime.CommonTokenStream;
34 import org.antlr.v4.runtime.RecognitionException;
35 import org.antlr.v4.runtime.Recognizer;
36 import org.onap.cps.cpspath.parser.antlr4.CpsPathLexer;
37 import org.onap.cps.cpspath.parser.antlr4.CpsPathParser;
41 @NoArgsConstructor(access = AccessLevel.PACKAGE)
42 public class CpsPathUtil {
45 * Returns a normalized xpath path query.
47 * @param xpathSource xpath
48 * @return a normalized xpath String.
50 public static String getNormalizedXpath(final String xpathSource) {
51 return getCpsPathBuilder(xpathSource).build().getNormalizedXpath();
55 * Returns the parent xpath.
57 * @param xpathSource xpath
58 * @return the parent xpath String.
60 public static String getNormalizedParentXpath(final String xpathSource) {
61 return getCpsPathBuilder(xpathSource).build().getNormalizedParentPath();
64 public static String[] getXpathNodeIdSequence(final String xpathSource) {
65 final List<String> containerNames = getCpsPathBuilder(xpathSource).build().getContainerNames();
66 return containerNames.toArray(new String[containerNames.size()]);
71 * Returns boolean indicating xpath is an absolute path to a list element.
73 * @param xpathSource xpath
74 * @return true if xpath is an absolute path to a list element
76 public static boolean isPathToListElement(final String xpathSource) {
77 final CpsPathQuery cpsPathQuery = getCpsPathBuilder(xpathSource).build();
78 return cpsPathQuery.getCpsPathPrefixType() == ABSOLUTE && cpsPathQuery.hasLeafConditions();
82 * Returns a cps path query.
84 * @param cpsPathSource cps path
85 * @return a CpsPathQuery object.
88 public static CpsPathQuery getCpsPathQuery(final String cpsPathSource) {
89 return getCpsPathBuilder(cpsPathSource).build();
92 private static CpsPathBuilder getCpsPathBuilder(final String cpsPathSource) {
93 final CharStream inputStream = CharStreams.fromString(cpsPathSource);
94 final CpsPathLexer cpsPathLexer = new CpsPathLexer(inputStream);
95 final CpsPathParser cpsPathParser = new CpsPathParser(new CommonTokenStream(cpsPathLexer));
96 cpsPathParser.addErrorListener(new BaseErrorListener() {
98 public void syntaxError(final Recognizer<?, ?> recognizer, final Object offendingSymbol, final int line,
99 final int charPositionInLine, final String msg, final RecognitionException e) {
100 throw new PathParsingException("failed to parse at line " + line + " due to " + msg,
101 e == null ? "" : e.getMessage());
104 final CpsPathBuilder cpsPathBuilder = new CpsPathBuilder();
105 cpsPathParser.addParseListener(cpsPathBuilder);
106 cpsPathParser.cpsPath();
107 return cpsPathBuilder;