--- /dev/null
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2025 OpenInfra Foundation Europe. All rights reserved.
+ * ================================================================================
+ * 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.ncmp.impl.utils;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Optional;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public class JexParser {
+
+ private static final Pattern LOCATION_SEGMENT_PATTERN = Pattern.compile("(.*)\\[id=\\\"(.*)\\\"]");
+ private static final String JEX_COMMENT_PREFIX = "&&";
+ private static final String LINE_SEPARATOR_REGEX = "\\R";
+ private static final String SEGMENT_SEPARATOR = "/";
+
+ /**
+ * Resolves alternate ids from a JEX basic expression with many paths.
+ *
+ * @param jsonExpression Multi-line JEX string with possible comments and relative xpaths.
+ * @return List of unique alternate ids (FDNs) resolved from each valid path.
+ */
+ public static List<String> extractFdnsFromLocationPaths(final String jsonExpression) {
+ if (jsonExpression == null) {
+ return Collections.emptyList();
+ }
+
+ final String[] lines = jsonExpression.split(LINE_SEPARATOR_REGEX);
+
+ final Stream<String> locationPaths = Arrays.stream(lines)
+ .map(String::trim)
+ .filter(locationPath -> !locationPath.startsWith(JEX_COMMENT_PREFIX));
+
+ final Stream<String> fdns = locationPaths
+ .map(JexParser::extractFdnPrefix)
+ .flatMap(Optional::stream)
+ .distinct();
+
+ return fdns.collect(Collectors.toList());
+ }
+
+ /**
+ * Returns FDN from a JSON expression as a java Optional.
+ * Example: /SubNetwork[id="SN1"]/ManagedElement[id="ME1"]
+ * returns: /SubNetwork=SN1/ManagedElement=ME1
+ *
+ * @param locationPath A single JEX path.
+ * @return Optional containing resolved FDN if found; empty otherwise.
+ */
+ private static Optional<String> extractFdnPrefix(final String locationPath) {
+ final List<String> locationPathSegments = splitIntoLocationPathsSegments(locationPath);
+ final StringBuilder fdnBuilder = new StringBuilder();
+ for (final String locationPathSegment : locationPathSegments) {
+
+ final Matcher matcher = LOCATION_SEGMENT_PATTERN.matcher(locationPathSegment);
+ if (matcher.find()) {
+ final String managedObjectName = matcher.group(1);
+ final String managedObjectId = matcher.group(2);
+ fdnBuilder.append(SEGMENT_SEPARATOR)
+ .append(managedObjectName)
+ .append("=")
+ .append(managedObjectId);
+ } else {
+ break;
+ }
+ }
+
+ final String fdn = fdnBuilder.toString();
+ return fdn.isEmpty() ? Optional.empty() : Optional.of(fdn);
+ }
+
+ private static List<String> splitIntoLocationPathsSegments(final String locationPath) {
+ final String[] locationPathSegments = locationPath.split(SEGMENT_SEPARATOR);
+ final List<String> locationPathSegmentsAsList = new ArrayList<>(Arrays.asList(locationPathSegments));
+ if (!locationPathSegmentsAsList.isEmpty()) {
+ locationPathSegmentsAsList.remove(0); // ignore root
+ }
+ return locationPathSegmentsAsList;
+ }
+}
+
+
+
+
+
+
+
--- /dev/null
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2025 OpenInfra Foundation Europe. All rights reserved.
+ * ================================================================================
+ * 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.ncmp.impl.utils
+
+import spock.lang.Specification
+
+class JexParserSpec extends Specification {
+
+ def 'Parsing single JSON Expression with #scenario.'() {
+ when: 'the parser extracts FDNs'
+ def result = JexParser.extractFdnsFromLocationPaths(locationPath)
+ then: 'only the expected top-level absolute paths with id is returned'
+ assert result[0] == expectedFdn
+ where: 'Following expressions are used'
+ scenario | locationPath || expectedFdn
+ 'single segment' | '/SubNetwork[id="SN1"]' || '/SubNetwork=SN1'
+ 'two segments' | '/SubNetwork[id="SN1"]/ManagedElement[id="ME1"]' || '/SubNetwork=SN1/ManagedElement=ME1'
+ 'segment and mo without id' | '/SubNetwork[id="SN1"]/attributes]' || '/SubNetwork=SN1'
+ 'segment and mos without id' | '/SubNetwork[id="SN1"]/attributes/vendorName' || '/SubNetwork=SN1'
+ 'segment and mo with other attribute expressions' | '/SubNetwork[id="SN1"]/vendor[name="V1"]' || '/SubNetwork=SN1'
+ 'segment followed by wildcard' | '/SubNetwork[id="SN1"]/*' || '/SubNetwork=SN1'
+ }
+
+ def 'Parsing multiple JSON Expressions.'() {
+ given: 'multiple JSON expressions with multiple absolute paths, attributes, and filters'
+ def locationPath = """
+ /SubNetwork[id="SN1"]/ManagedElement
+ /SubNetwork[id="SN2"]
+ """
+ when: 'the parser extracts FDNs'
+ def result = JexParser.extractFdnsFromLocationPaths(locationPath)
+ then: 'the expected paths with ids are returned'
+ assert result.size() == 2
+ assert result.containsAll(['/SubNetwork=SN1', '/SubNetwork=SN2'])
+ }
+
+ def 'Parsing multiple JSON Expressions with duplicate results.'() {
+ given: 'multiple JSON expressions with multiple absolute paths, attributes, and filters'
+ def locationPath = """
+ /SubNetwork[id="SN1"]/ManagedElement
+ /SubNetwork[id="SN1"]
+ """
+ when: 'the parser extracts FDNs'
+ def result = JexParser.extractFdnsFromLocationPaths(locationPath)
+ then: 'only one unique path with id is returned'
+ assert result == ['/SubNetwork=SN1']
+ }
+
+ def 'Ignored expressions #scenario.'() {
+ when: 'the parser extracts FDNs'
+ def result = JexParser.extractFdnsFromLocationPaths(locationPath)
+ then: 'the result is empty'
+ assert result.isEmpty()
+ where: 'Following expressions are used'
+ scenario | locationPath
+ 'comments' | '&&text only comment'
+ 'commented out FDN' | '&&/SubNetwork[id="SN1"]/ManagedElement[id="ME1"]'
+ 'blank' | ''
+ 'root' | '/'
+ 'no IDs at all' | '/SubNetwork/attribute'
+ 'null' | null
+ }
+}
+
+
+
+
Code Review / cps.git / commitdiff