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Diffstat (limited to 'cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathUtil.java')
-rw-r--r-- | cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathUtil.java | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathUtil.java b/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathUtil.java new file mode 100644 index 000000000..97d7d1d76 --- /dev/null +++ b/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathUtil.java @@ -0,0 +1,81 @@ +/* + * ============LICENSE_START======================================================= + * Copyright (C) 2022 Nordix Foundation + * ================================================================================ + * 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. + * + * SPDX-License-Identifier: Apache-2.0 + * ============LICENSE_END========================================================= + */ + +package org.onap.cps.cpspath.parser; + +import lombok.AccessLevel; +import lombok.Getter; +import lombok.NoArgsConstructor; +import lombok.Setter; +import org.antlr.v4.runtime.BaseErrorListener; +import org.antlr.v4.runtime.CharStream; +import org.antlr.v4.runtime.CharStreams; +import org.antlr.v4.runtime.CommonTokenStream; +import org.antlr.v4.runtime.RecognitionException; +import org.antlr.v4.runtime.Recognizer; +import org.onap.cps.cpspath.parser.antlr4.CpsPathLexer; +import org.onap.cps.cpspath.parser.antlr4.CpsPathParser; + +@Getter +@Setter +@NoArgsConstructor(access = AccessLevel.PACKAGE) +public class CpsPathUtil { + + /** + * Returns a normalized xpath path query. + * + * @param xpathSource xpath + * @return a normalized xpath String. + */ + public static String getNormalizedXpath(final String xpathSource) { + final CpsPathBuilder cpsPathBuilder = getCpsPathBuilder(xpathSource); + return cpsPathBuilder.build().getNormalizedXpath(); + } + + /** + * Returns a cps path query. + * + * @param cpsPathSource cps path + * @return a CpsPathQuery object. + */ + + public static CpsPathQuery getCpsPathQuery(final String cpsPathSource) { + final CpsPathBuilder cpsPathBuilder = getCpsPathBuilder(cpsPathSource); + return cpsPathBuilder.build(); + } + + private static CpsPathBuilder getCpsPathBuilder(final String cpsPathSource) { + final CharStream inputStream = CharStreams.fromString(cpsPathSource); + final CpsPathLexer cpsPathLexer = new CpsPathLexer(inputStream); + final CpsPathParser cpsPathParser = new CpsPathParser(new CommonTokenStream(cpsPathLexer)); + cpsPathParser.addErrorListener(new BaseErrorListener() { + @Override + public void syntaxError(final Recognizer<?, ?> recognizer, final Object offendingSymbol, final int line, + final int charPositionInLine, final String msg, final RecognitionException e) { + throw new PathParsingException("failed to parse at line " + line + " due to " + msg, + e == null ? "" : e.getMessage()); + } + }); + final CpsPathBuilder cpsPathBuilder = new CpsPathBuilder(); + cpsPathParser.addParseListener(cpsPathBuilder); + cpsPathParser.cpsPath(); + return cpsPathBuilder; + } +} |