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/*******************************************************************************
* Copyright (c) 2018 Politecnico di Torino and others.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Apache License, Version 2.0
* which accompanies this distribution, and is available at
* http://www.apache.org/licenses/LICENSE-2.0
*******************************************************************************/
package it.polito.verigraph.tosca.converter.yaml;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import it.polito.verigraph.exception.BadRequestException;
import it.polito.verigraph.model.Configuration;
import it.polito.verigraph.model.Graph;
import it.polito.verigraph.model.Neighbour;
import it.polito.verigraph.model.Node;
import it.polito.verigraph.tosca.YamlParsingUtils;
import it.polito.verigraph.tosca.serializer.YamlConfigSerializer;
import it.polito.verigraph.tosca.yaml.beans.ConfigurationYaml;
import it.polito.verigraph.tosca.yaml.beans.NodeTemplateYaml;
import it.polito.verigraph.tosca.yaml.beans.RelationshipTemplateYaml;
import it.polito.verigraph.tosca.yaml.beans.ServiceTemplateYaml;
public class YamlToGraph {
public static Graph mapTopologyTemplateYaml(ServiceTemplateYaml yamlServiceTemplate) throws BadRequestException {
Graph graph = new Graph();
Map<Long, Node> graphNodes = new HashMap<>();
Map<String, NodeTemplateYaml> nodes = new HashMap<>();
Map<String, RelationshipTemplateYaml> relats = new HashMap<>();
nodes = yamlServiceTemplate.getTopology_template().getNode_templates();
for (Map.Entry<String, NodeTemplateYaml> nodeYamlEntry : nodes.entrySet()) {
Node node = mapNodeTemplateYaml(nodeYamlEntry.getValue());
try {
graphNodes.put(Long.valueOf(nodeYamlEntry.getKey()), node);
} catch (NumberFormatException e) {
throw new BadRequestException("The NodeTemplate ID must be a number.");
}
}
// Add Neighbours to the Nodes of the list
relats = yamlServiceTemplate.getTopology_template().getRelationship_templates();
mapRelationshipTemplatesYaml(graphNodes, relats);
// Add Nodes and ID to the graph
graph.setNodes(graphNodes);
try {
graph.setId(Long.valueOf(yamlServiceTemplate.getMetadata().get("template_id")));
} catch (NumberFormatException ex) {
throw new BadRequestException("If you want to use this service, the TopologyTemplate ID must be a number.");
} catch (NullPointerException ex) {} //ID is not mandatory for the user since VeriGraph provides its IDs
return graph;
}
private static Node mapNodeTemplateYaml(NodeTemplateYaml yamlNodeTemplate) {
Node node = new Node();
String type = yamlNodeTemplate.getType().replace("verigraph.nodeTypes.", "").toLowerCase();
try {
node.setName(yamlNodeTemplate.getName());
Configuration conf = mapConfigurationYaml(yamlNodeTemplate);
node.setConfiguration(conf);
node.setFunctional_type(type);
} catch(NullPointerException ex) {
throw new BadRequestException("A NodeTemplate has wrong fields representation.");
}
return node;
}
private static void mapRelationshipTemplatesYaml(Map<Long, Node> graphNodes, Map<String, RelationshipTemplateYaml> relats) {
//updated nodes (update = Node + its Neighbours)
for(Map.Entry<String, RelationshipTemplateYaml> yamlRelationshipTemplate : relats.entrySet()) {
try {
// Retrieve relationship information
String target = yamlRelationshipTemplate.getValue().getProperties().get("target_id");
String source = yamlRelationshipTemplate.getValue().getProperties().get("source_id");
String name = graphNodes.get(Long.valueOf(target)).getName();
Neighbour neigh = new Neighbour();
neigh.setName(name);
neigh.setId(Long.valueOf(target));
//Retrieve the Neighbour map of the source Node and add the Neighbour
Node sourceNode = graphNodes.get(Long.valueOf(source));
Map<Long,Neighbour> sourceNodeNeighMap = sourceNode.getNeighbours();
if(sourceNodeNeighMap.containsKey(neigh.getId()))
throw new BadRequestException("The RelationshipTemplate ID must be unique.");
else
sourceNodeNeighMap.put(neigh.getId(), neigh);
sourceNode.setNeighbours(sourceNodeNeighMap);
//Update the Node list
graphNodes.put(Long.valueOf(source), sourceNode);
} catch(NullPointerException | NumberFormatException ex) {
throw new BadRequestException("A RelationshipTemplate has wrong fields representation.");
}
}
}
private static Configuration mapConfigurationYaml(NodeTemplateYaml node) {
Configuration config = new Configuration();
JsonNode jsonConfiguration = null;
ObjectMapper mapper = new ObjectMapper();
SimpleModule module = new SimpleModule();
module.addSerializer(ConfigurationYaml.class, new YamlConfigSerializer());
mapper.registerModule(module);
try{
String stringConfiguration = YamlParsingUtils.obtainConfiguration(node);
jsonConfiguration = mapper.readTree(stringConfiguration);
config.setConfiguration(jsonConfiguration);
config.setDescription("");
config.setId("");
} catch (NullPointerException | IOException | BadRequestException e) {
throw new BadRequestException("Not able to retrieve a valid configuration");
}
return config;
}
}
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