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Diffstat (limited to 'cps-service/src/main/java/org/onap/cps/impl/CpsDeltaServiceImpl.java')
| -rw-r--r-- | cps-service/src/main/java/org/onap/cps/impl/CpsDeltaServiceImpl.java | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/cps-service/src/main/java/org/onap/cps/impl/CpsDeltaServiceImpl.java b/cps-service/src/main/java/org/onap/cps/impl/CpsDeltaServiceImpl.java new file mode 100644 index 0000000000..7a9d142506 --- /dev/null +++ b/cps-service/src/main/java/org/onap/cps/impl/CpsDeltaServiceImpl.java @@ -0,0 +1,203 @@ +/* + * ============LICENSE_START======================================================= + * Copyright (C) 2023 TechMahindra Ltd. + * ================================================================================ + * 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.impl; + +import java.io.Serializable; +import java.util.ArrayList; +import java.util.Collection; +import java.util.Collections; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Map; +import java.util.Objects; +import lombok.extern.slf4j.Slf4j; +import org.onap.cps.api.CpsDeltaService; +import org.onap.cps.api.model.DataNode; +import org.onap.cps.api.model.DeltaReport; +import org.onap.cps.api.model.DeltaReportBuilder; +import org.springframework.stereotype.Service; + +@Slf4j +@Service +public class CpsDeltaServiceImpl implements CpsDeltaService { + + @Override + public List<DeltaReport> getDeltaReports(final Collection<DataNode> sourceDataNodes, + final Collection<DataNode> targetDataNodes) { + + final List<DeltaReport> deltaReport = new ArrayList<>(); + + final Map<String, DataNode> xpathToSourceDataNodes = convertToXPathToDataNodesMap(sourceDataNodes); + final Map<String, DataNode> xpathToTargetDataNodes = convertToXPathToDataNodesMap(targetDataNodes); + + deltaReport.addAll(getRemovedAndUpdatedDeltaReports(xpathToSourceDataNodes, xpathToTargetDataNodes)); + + deltaReport.addAll(getAddedDeltaReports(xpathToSourceDataNodes, xpathToTargetDataNodes)); + + return Collections.unmodifiableList(deltaReport); + } + + private static Map<String, DataNode> convertToXPathToDataNodesMap( + final Collection<DataNode> dataNodes) { + final Map<String, DataNode> xpathToDataNode = new LinkedHashMap<>(); + for (final DataNode dataNode : dataNodes) { + xpathToDataNode.put(dataNode.getXpath(), dataNode); + final Collection<DataNode> childDataNodes = dataNode.getChildDataNodes(); + if (!childDataNodes.isEmpty()) { + xpathToDataNode.putAll(convertToXPathToDataNodesMap(childDataNodes)); + } + } + return xpathToDataNode; + } + + private static List<DeltaReport> getRemovedAndUpdatedDeltaReports( + final Map<String, DataNode> xpathToSourceDataNodes, + final Map<String, DataNode> xpathToTargetDataNodes) { + final List<DeltaReport> removedAndUpdatedDeltaReportEntries = new ArrayList<>(); + for (final Map.Entry<String, DataNode> entry: xpathToSourceDataNodes.entrySet()) { + final String xpath = entry.getKey(); + final DataNode sourceDataNode = entry.getValue(); + final DataNode targetDataNode = xpathToTargetDataNodes.get(xpath); + final List<DeltaReport> deltaReports; + if (targetDataNode == null) { + deltaReports = getRemovedDeltaReports(xpath, sourceDataNode); + } else { + deltaReports = getUpdatedDeltaReports(xpath, sourceDataNode, targetDataNode); + } + removedAndUpdatedDeltaReportEntries.addAll(deltaReports); + } + return removedAndUpdatedDeltaReportEntries; + } + + private static List<DeltaReport> getRemovedDeltaReports(final String xpath, final DataNode sourceDataNode) { + final List<DeltaReport> removedDeltaReportEntries = new ArrayList<>(); + final Map<String, Serializable> sourceDataNodeLeaves = sourceDataNode.getLeaves(); + final DeltaReport removedDeltaReportEntry = new DeltaReportBuilder().actionRemove().withXpath(xpath) + .withSourceData(sourceDataNodeLeaves).build(); + removedDeltaReportEntries.add(removedDeltaReportEntry); + return removedDeltaReportEntries; + } + + private static List<DeltaReport> getUpdatedDeltaReports(final String xpath, final DataNode sourceDataNode, + final DataNode targetDataNode) { + final List<DeltaReport> updatedDeltaReportEntries = new ArrayList<>(); + final Map<Map<String, Serializable>, Map<String, Serializable>> updatedLeavesAsSourceDataToTargetData = + getUpdatedLeavesBetweenSourceAndTargetDataNode(sourceDataNode.getLeaves(), targetDataNode.getLeaves()); + addUpdatedLeavesToDeltaReport(xpath, updatedLeavesAsSourceDataToTargetData, updatedDeltaReportEntries); + return updatedDeltaReportEntries; + } + + private static Map<Map<String, Serializable>, + Map<String, Serializable>> getUpdatedLeavesBetweenSourceAndTargetDataNode( + final Map<String, Serializable> leavesOfSourceDataNode, + final Map<String, Serializable> leavesOfTargetDataNode) { + final Map<Map<String, Serializable>, Map<String, Serializable>> updatedLeavesAsSourceDataToTargetData = + new LinkedHashMap<>(); + final Map<String, Serializable> sourceDataInDeltaReport = new LinkedHashMap<>(); + final Map<String, Serializable> targetDataInDeltaReport = new LinkedHashMap<>(); + processLeavesPresentInSourceAndTargetDataNode(leavesOfSourceDataNode, leavesOfTargetDataNode, + sourceDataInDeltaReport, targetDataInDeltaReport); + processLeavesUniqueInTargetDataNode(leavesOfSourceDataNode, leavesOfTargetDataNode, + sourceDataInDeltaReport, targetDataInDeltaReport); + final boolean isUpdatedDataInDeltaReport = + !sourceDataInDeltaReport.isEmpty() || !targetDataInDeltaReport.isEmpty(); + if (isUpdatedDataInDeltaReport) { + updatedLeavesAsSourceDataToTargetData.put(sourceDataInDeltaReport, targetDataInDeltaReport); + } + return updatedLeavesAsSourceDataToTargetData; + } + + private static void processLeavesPresentInSourceAndTargetDataNode( + final Map<String, Serializable> leavesOfSourceDataNode, + final Map<String, Serializable> leavesOfTargetDataNode, + final Map<String, Serializable> sourceDataInDeltaReport, + final Map<String, Serializable> targetDataInDeltaReport) { + for (final Map.Entry<String, Serializable> entry: leavesOfSourceDataNode.entrySet()) { + final String key = entry.getKey(); + final Serializable sourceLeaf = entry.getValue(); + final Serializable targetLeaf = leavesOfTargetDataNode.get(key); + compareLeaves(key, sourceLeaf, targetLeaf, sourceDataInDeltaReport, targetDataInDeltaReport); + } + } + + private static void processLeavesUniqueInTargetDataNode( + final Map<String, Serializable> leavesOfSourceDataNode, + final Map<String, Serializable> leavesOfTargetDataNode, + final Map<String, Serializable> sourceDataInDeltaReport, + final Map<String, Serializable> targetDataInDeltaReport) { + final Map<String, Serializable> uniqueLeavesOfTargetDataNode = + new LinkedHashMap<>(leavesOfTargetDataNode); + uniqueLeavesOfTargetDataNode.keySet().removeAll(leavesOfSourceDataNode.keySet()); + for (final Map.Entry<String, Serializable> entry: uniqueLeavesOfTargetDataNode.entrySet()) { + final String key = entry.getKey(); + final Serializable targetLeaf = entry.getValue(); + final Serializable sourceLeaf = leavesOfSourceDataNode.get(key); + compareLeaves(key, sourceLeaf, targetLeaf, sourceDataInDeltaReport, targetDataInDeltaReport); + } + } + + private static void compareLeaves(final String key, + final Serializable sourceLeaf, + final Serializable targetLeaf, + final Map<String, Serializable> sourceDataInDeltaReport, + final Map<String, Serializable> targetDataInDeltaReport) { + if (sourceLeaf != null && targetLeaf != null) { + if (!Objects.equals(sourceLeaf, targetLeaf)) { + sourceDataInDeltaReport.put(key, sourceLeaf); + targetDataInDeltaReport.put(key, targetLeaf); + } + } else if (sourceLeaf == null) { + targetDataInDeltaReport.put(key, targetLeaf); + + } else { + sourceDataInDeltaReport.put(key, sourceLeaf); + } + } + + private static void addUpdatedLeavesToDeltaReport(final String xpath, + final Map<Map<String, Serializable>, Map<String, + Serializable>> updatedLeavesAsSourceDataToTargetData, + final List<DeltaReport> updatedDeltaReportEntries) { + for (final Map.Entry<Map<String, Serializable>, Map<String, Serializable>> entry: + updatedLeavesAsSourceDataToTargetData.entrySet()) { + final DeltaReport updatedDataForDeltaReport = new DeltaReportBuilder().actionReplace() + .withXpath(xpath).withSourceData(entry.getKey()).withTargetData(entry.getValue()).build(); + updatedDeltaReportEntries.add(updatedDataForDeltaReport); + } + + } + + private static List<DeltaReport> getAddedDeltaReports(final Map<String, DataNode> xpathToSourceDataNodes, + final Map<String, DataNode> xpathToTargetDataNodes) { + + final List<DeltaReport> addedDeltaReportEntries = new ArrayList<>(); + final Map<String, DataNode> xpathToAddedNodes = new LinkedHashMap<>(xpathToTargetDataNodes); + xpathToAddedNodes.keySet().removeAll(xpathToSourceDataNodes.keySet()); + for (final Map.Entry<String, DataNode> entry: xpathToAddedNodes.entrySet()) { + final String xpath = entry.getKey(); + final DataNode dataNode = entry.getValue(); + final DeltaReport addedDataForDeltaReport = new DeltaReportBuilder().actionCreate().withXpath(xpath) + .withTargetData(dataNode.getLeaves()).build(); + addedDeltaReportEntries.add(addedDataForDeltaReport); + } + return addedDeltaReportEntries; + } +} |