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package org.onap.sdc.tosca.parser.impl;
import com.google.common.collect.Lists;
import org.onap.sdc.tosca.parser.api.IEntityDetails;
import org.onap.sdc.tosca.parser.elements.queries.EntityQuery;
import org.onap.sdc.tosca.parser.elements.queries.TopologyTemplateQuery;
import org.onap.sdc.tosca.parser.enums.EntityTemplateType;
import org.onap.sdc.tosca.parser.enums.SdcTypes;
import org.onap.sdc.toscaparser.api.NodeTemplate;
import org.onap.sdc.toscaparser.api.ToscaTemplate;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
/**
* Performs search for entity templates inside node template according to query criteria
*/
class QueryProcessor {
private static final Logger logger = LoggerFactory.getLogger(QueryProcessor.class.getName());
private final EntityQuery entityQuery;
private final TopologyTemplateQuery topologyTemplateQuery;
private final ToscaTemplate toscaTemplate;
private boolean isRecursive = false;
QueryProcessor(ToscaTemplate toscaTemplate, EntityQuery entityQuery, TopologyTemplateQuery topologyTemplateQuery, boolean isRecursive) {
this.toscaTemplate = toscaTemplate;
this.entityQuery = entityQuery == null ? EntityQuery.newBuilder(EntityTemplateType.ALL).build() : entityQuery;
this.topologyTemplateQuery = topologyTemplateQuery;
this.isRecursive = isRecursive;
}
List<IEntityDetails> doQuery() {
List<IEntityDetails> entityDetailsList = Lists.newArrayList();
if (isServiceSearch()) {
//search for entities inside the service
if (logger.isDebugEnabled()) {
logger.debug("Service {} is searched for {}", toscaTemplate.getMetaData().getValue(SdcPropertyNames.PROPERTY_NAME_NAME), entityQuery);
}
entityDetailsList.addAll(entityQuery.getEntitiesFromService(toscaTemplate));
if (!isRecursive) {
return entityDetailsList;
}
}
List<NodeTemplate> foundTopologyTemplates = getInternalTopologyTemplates(toscaTemplate.getNodeTemplates(), false);
if (isRecursive) {
if (logger.isDebugEnabled()) {
logger.debug("Search for entities recursively");
}
//go over internal topology templates of the found templates
// and search for instances of the same type
//if the queried topology template is "SERVICE", search for all instances of templates in the service
List<NodeTemplate> internalTopologyTemplates = foundTopologyTemplates.stream()
.filter(nt->nt.getSubMappingToscaTemplate() != null)
.map(nt->getInternalTopologyTemplates(nt.getSubMappingToscaTemplate().getNodeTemplates(), true))
.flatMap(List::stream)
.collect(Collectors.toList());
foundTopologyTemplates.addAll(internalTopologyTemplates);
}
if (logger.isDebugEnabled()) {
logger.debug("Found topology templates {} matching following query criteria: {}",
foundTopologyTemplates, topologyTemplateQuery);
}
//go over all node templates found according to query criteria and recursive flag and
// search for the requested entities.
entityDetailsList.addAll(searchEntitiesInsideTopologyTemplates(foundTopologyTemplates));
return entityDetailsList;
}
private Map<String, NodeTemplate> convertListToMap(List<NodeTemplate> nodeTemplateList) {
// we use map to avoid duplicate search through same node templates
return nodeTemplateList.stream()
.collect(Collectors.toMap(NodeTemplate::getName, nt->nt, (nt1, nt2)->nt1));
}
private List<IEntityDetails> searchEntitiesInsideTopologyTemplates(List<NodeTemplate> foundTopologyTemplates) {
return convertListToMap(foundTopologyTemplates)
.values()
.stream()
.map(entityQuery::getEntitiesFromTopologyTemplate)
.flatMap(List::stream)
.collect(Collectors.toList());
}
private boolean isServiceSearch() {
return topologyTemplateQuery.getNodeTemplateType() == SdcTypes.SERVICE;
}
private List<NodeTemplate> getInternalTopologyTemplates(List<NodeTemplate> nodeTemplateList, boolean isRecursive) {
return nodeTemplateList
.stream()
.map(child->getTopologyTemplatesByQuery(child, isRecursive))
.flatMap(List::stream)
.collect(Collectors.toList());
}
private List<NodeTemplate> getTopologyTemplatesByQuery(NodeTemplate current, boolean isRecursive) {
List<NodeTemplate> topologyTemplateList = Lists.newArrayList();
boolean isTopologyTemplateFound = isRecursive ?
SdcTypes.isComplex(current.getMetaData().getValue(SdcPropertyNames.PROPERTY_NAME_TYPE))
: topologyTemplateQuery.isMatchingSearchCriteria(current);
if (isTopologyTemplateFound) {
topologyTemplateList.add(current);
if (!isRecursive) {
//recursion stop condition
return topologyTemplateList;
}
}
if (SdcTypes.isComplex(current.getMetaData().getValue(SdcPropertyNames.PROPERTY_NAME_TYPE)) &&
current.getSubMappingToscaTemplate() != null) {
//search the node template inside a given topology template
topologyTemplateList.addAll(current.getSubMappingToscaTemplate().getNodeTemplates()
.stream()
.map(nt->getTopologyTemplatesByQuery(nt, isRecursive))
.flatMap(List::stream)
.collect(Collectors.toList()));
}
return topologyTemplateList;
}
}
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