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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.grpc;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import javax.xml.bind.JAXBException;
import it.polito.verigraph.exception.BadRequestException;
import it.polito.verigraph.exception.DataNotFoundException;
import it.polito.verigraph.grpc.NodeTemplateGrpc;
import it.polito.verigraph.grpc.NodeTemplateGrpc.Type;
import it.polito.verigraph.grpc.RelationshipTemplateGrpc;
import it.polito.verigraph.grpc.TopologyTemplateGrpc;
import it.polito.verigraph.grpc.ToscaConfigurationGrpc;
import it.polito.verigraph.tosca.YamlParsingUtils;
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 YamlToGrpc {
/** Returns the (first) TopologyTemplate found in the TOSCA-compliant yaml file */
public static TopologyTemplateGrpc obtainTopologyTemplateGrpc (String filepath)
throws IOException, JAXBException, DataNotFoundException, ClassCastException, BadRequestException{
ServiceTemplateYaml serviceTemplate = YamlParsingUtils.obtainServiceTemplate(filepath);
//Retrieving of list of NodeTemplate and RelationshipTemplate
List<NodeTemplateGrpc> nodes = new ArrayList<NodeTemplateGrpc>();
List<RelationshipTemplateGrpc> relats = new ArrayList<RelationshipTemplateGrpc>();
try {
for(Map.Entry<String, NodeTemplateYaml> node : YamlParsingUtils.obtainNodeTemplates(serviceTemplate).entrySet()) {
for(NodeTemplateGrpc alreadyAddedNode : nodes)
if(alreadyAddedNode.getId().equals(node.getKey()))
throw new BadRequestException("The NodeTemplate ID must be unique.");
nodes.add(parseNodeTemplate(node));
}
} catch (NullPointerException e) {
throw new BadRequestException("There is not any NodeTemplate in the ServiceTemplate provided.");
}
try {
for(Map.Entry<String, RelationshipTemplateYaml> rel : YamlParsingUtils.obtainRelationshipTemplates(serviceTemplate).entrySet()) {
relats.add(parseRelationshipTemplate(rel, nodes));
}
} catch (NullPointerException e) {
throw new BadRequestException("There is not any RelationshipTemplate in the ServiceTemplate provided.");
}
//Creating TopologyTemplateGrpc object to be sent to server
return TopologyTemplateGrpc.newBuilder()
.setId("0") //useless value since the server chooses the actual value for the GraphID
.addAllNodeTemplate(nodes)
.addAllRelationshipTemplate(relats)
.build();
}
/** Parsing method: RelationshipTemplateYaml(tosca) --> RelationshipTemplateGrpc */
private static RelationshipTemplateGrpc parseRelationshipTemplate(Entry<String, RelationshipTemplateYaml> rel, List<NodeTemplateGrpc> nodes) throws BadRequestException{
String source, target;
boolean valid_source = false;
boolean valid_target = false;
//RelationshipTemplateGrpc building
RelationshipTemplateGrpc.Builder relatgrpc = RelationshipTemplateGrpc.newBuilder();
//ID can be null
try {
relatgrpc.setId(rel.getKey());
relatgrpc.setName(rel.getValue().getProperties().get("name"));
source = rel.getValue().getProperties().get("source_id");
target = rel.getValue().getProperties().get("target_id");
} catch (NullPointerException ex) {
throw new BadRequestException("Incorrect fields in RelationshipTemplate:" + rel.getKey());
}
//Source and Target values must correctly refer to a NodeTemplate
if(source.equals(target))
throw new BadRequestException("Source and Target cannot be the same value");
for(NodeTemplateGrpc node : nodes) {
if(node.getId().equals(source))
valid_source = true;
if(node.getId().equals(target))
valid_target = true;
}
if(!(valid_source && valid_target))
throw new BadRequestException("Invalid NodeTemplate reference in RelationshipTemplate:" + rel.getKey());
return relatgrpc.setIdSourceNodeTemplate(source).setIdTargetNodeTemplate(target).build();
}
/** Parsing method: NodeTemplateYaml(tosca) --> NodeTemplateGrpc */
private static NodeTemplateGrpc parseNodeTemplate(Entry<String, NodeTemplateYaml> node)
throws ClassCastException, NullPointerException, BadRequestException {
Boolean isVerigraphCompl = true;
Type type;
//NodeTemplateGrpc building
NodeTemplateGrpc.Builder nodegrpc = NodeTemplateGrpc.newBuilder()
.setId(node.getKey());
try {
nodegrpc.setName(node.getValue().getName());
} catch (NullPointerException ex) {
throw new BadRequestException("Invalid name in a NodeTemplate.");
}
//Type cannot be null but it can be invalid
try {
type = Type.valueOf(node.getValue().getType().replace("verigraph.nodeTypes.", "").toLowerCase());
} catch (IllegalArgumentException | NullPointerException ex) {
//in case the NodeTemplate is not TOSCA-Verigraph compliant, we assume it to be a fieldmodifier node
type = Type.fieldmodifier;
isVerigraphCompl = false;
}
nodegrpc.setType(type);
ToscaConfigurationGrpc.Builder grpcConfig;
if(isVerigraphCompl) {
String jsonConfig = YamlParsingUtils.obtainConfiguration(node.getValue());
grpcConfig = ToscaConfigurationGrpc.newBuilder()
.setId("")
.setDescription("")
.setConfiguration(jsonConfig);
}
else {
grpcConfig = ToscaConfigurationGrpc.newBuilder()
.setId(ToscaGrpcUtils.defaultConfID)
.setDescription(ToscaGrpcUtils.defaultDescr)
.setConfiguration(ToscaGrpcUtils.defaultConfig);
}
nodegrpc.setConfiguration(grpcConfig.build());
return nodegrpc.build();
}
}
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