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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2021 Nordix Foundation
* Modifications Copyright (C) 2021 Pantheon.tech
* ================================================================================
* 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.spi.impl;
import static org.onap.cps.spi.FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.ImmutableSet.Builder;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import org.onap.cps.spi.CpsDataPersistenceService;
import org.onap.cps.spi.FetchDescendantsOption;
import org.onap.cps.spi.entities.AnchorEntity;
import org.onap.cps.spi.entities.DataspaceEntity;
import org.onap.cps.spi.entities.FragmentEntity;
import org.onap.cps.spi.model.DataNode;
import org.onap.cps.spi.model.DataNodeBuilder;
import org.onap.cps.spi.query.CpsPathQuery;
import org.onap.cps.spi.repository.AnchorRepository;
import org.onap.cps.spi.repository.DataspaceRepository;
import org.onap.cps.spi.repository.FragmentRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService {
@Autowired
private DataspaceRepository dataspaceRepository;
@Autowired
private AnchorRepository anchorRepository;
@Autowired
private FragmentRepository fragmentRepository;
private static final Gson GSON = new GsonBuilder().create();
@Override
public void addChildDataNode(final String dataspaceName, final String anchorName, final String parentXpath,
final DataNode dataNode) {
final FragmentEntity parentFragment = getFragmentByXpath(dataspaceName, anchorName, parentXpath);
final FragmentEntity fragmentEntity =
toFragmentEntity(parentFragment.getDataspace(), parentFragment.getAnchor(), dataNode);
parentFragment.getChildFragments().add(fragmentEntity);
fragmentRepository.save(parentFragment);
}
@Override
public void storeDataNode(final String dataspaceName, final String anchorName, final DataNode dataNode) {
final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
final FragmentEntity fragmentEntity = convertToFragmentWithAllDescendants(dataspaceEntity, anchorEntity,
dataNode);
fragmentRepository.save(fragmentEntity);
}
/**
* Convert DataNode object into Fragment and places the result in the fragments placeholder. Performs same action
* for all DataNode children recursively.
*
* @param dataspaceEntity dataspace
* @param anchorEntity anchorEntity
* @param dataNodeToBeConverted dataNode
* @return a Fragment built from current DataNode
*/
private static FragmentEntity convertToFragmentWithAllDescendants(final DataspaceEntity dataspaceEntity,
final AnchorEntity anchorEntity, final DataNode dataNodeToBeConverted) {
final FragmentEntity parentFragment = toFragmentEntity(dataspaceEntity, anchorEntity, dataNodeToBeConverted);
final Builder<FragmentEntity> childFragmentsImmutableSetBuilder = ImmutableSet.builder();
for (final DataNode childDataNode : dataNodeToBeConverted.getChildDataNodes()) {
final FragmentEntity childFragment =
convertToFragmentWithAllDescendants(parentFragment.getDataspace(), parentFragment.getAnchor(),
childDataNode);
childFragmentsImmutableSetBuilder.add(childFragment);
}
parentFragment.setChildFragments(childFragmentsImmutableSetBuilder.build());
return parentFragment;
}
private static FragmentEntity toFragmentEntity(final DataspaceEntity dataspaceEntity,
final AnchorEntity anchorEntity, final DataNode dataNode) {
return FragmentEntity.builder()
.dataspace(dataspaceEntity)
.anchor(anchorEntity)
.xpath(dataNode.getXpath())
.attributes(GSON.toJson(dataNode.getLeaves()))
.build();
}
@Override
public DataNode getDataNode(final String dataspaceName, final String anchorName, final String xpath,
final FetchDescendantsOption fetchDescendantsOption) {
final FragmentEntity fragmentEntity = getFragmentByXpath(dataspaceName, anchorName, xpath);
return toDataNode(fragmentEntity, fetchDescendantsOption);
}
private FragmentEntity getFragmentByXpath(final String dataspaceName, final String anchorName,
final String xpath) {
final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
return fragmentRepository.getByDataspaceAndAnchorAndXpath(dataspaceEntity, anchorEntity, xpath);
}
@Override
public List<DataNode> queryDataNodes(final String dataspaceName, final String anchorName, final String cpsPath,
final FetchDescendantsOption fetchDescendantsOption) {
final DataspaceEntity dataspaceEntity = dataspaceRepository.getByName(dataspaceName);
final AnchorEntity anchorEntity = anchorRepository.getByDataspaceAndName(dataspaceEntity, anchorName);
final CpsPathQuery cpsPathQuery = CpsPathQuery.createFrom(cpsPath);
final List<FragmentEntity> fragmentEntities = fragmentRepository
.getByAnchorAndXpathAndLeafAttributes(anchorEntity.getId(), cpsPathQuery
.getXpathPrefix(), cpsPathQuery.getLeafName(), cpsPathQuery.getLeafValue());
return fragmentEntities.stream()
.map(fragmentEntity -> toDataNode(fragmentEntity, fetchDescendantsOption))
.collect(Collectors.toUnmodifiableList());
}
private static DataNode toDataNode(final FragmentEntity fragmentEntity,
final FetchDescendantsOption fetchDescendantsOption) {
final Map<String, Object> leaves = GSON.fromJson(fragmentEntity.getAttributes(), Map.class);
final List<DataNode> childDataNodes = getChildDataNodes(fragmentEntity, fetchDescendantsOption);
return new DataNodeBuilder()
.withXpath(fragmentEntity.getXpath())
.withLeaves(leaves)
.withChildDataNodes(childDataNodes).build();
}
private static List<DataNode> getChildDataNodes(final FragmentEntity fragmentEntity,
final FetchDescendantsOption fetchDescendantsOption) {
if (fetchDescendantsOption == INCLUDE_ALL_DESCENDANTS) {
return fragmentEntity.getChildFragments().stream()
.map(childFragmentEntity -> toDataNode(childFragmentEntity, fetchDescendantsOption))
.collect(Collectors.toUnmodifiableList());
}
return Collections.emptyList();
}
@Override
public void updateDataLeaves(final String dataspaceName, final String anchorName, final String xpath,
final Map<String, Object> leaves) {
final FragmentEntity fragmentEntity = getFragmentByXpath(dataspaceName, anchorName, xpath);
fragmentEntity.setAttributes(GSON.toJson(leaves));
fragmentRepository.save(fragmentEntity);
}
@Override
public void replaceDataNodeTree(final String dataspaceName, final String anchorName, final DataNode dataNode) {
final FragmentEntity fragmentEntity = getFragmentByXpath(dataspaceName, anchorName, dataNode.getXpath());
removeExistingDescendants(fragmentEntity);
fragmentEntity.setAttributes(GSON.toJson(dataNode.getLeaves()));
final Set<FragmentEntity> childFragmentEntities = dataNode.getChildDataNodes().stream().map(
childDataNode -> convertToFragmentWithAllDescendants(
fragmentEntity.getDataspace(), fragmentEntity.getAnchor(), childDataNode)
).collect(Collectors.toUnmodifiableSet());
fragmentEntity.setChildFragments(childFragmentEntities);
fragmentRepository.save(fragmentEntity);
}
private void removeExistingDescendants(final FragmentEntity fragmentEntity) {
fragmentEntity.setChildFragments(Collections.emptySet());
fragmentRepository.save(fragmentEntity);
}
}
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