Caused by: java.lang.IllegalArgumentException: Type EMBEDDED must be a multi value type (collection or map)

[surendrayadav15]

I am getting following error when trying to persist java object in Orient DB version "3.0.15"

Mar 29, 2019 12:34:05 PM com.orientechnologies.common.log.OLogManager log
INFO: Windows OS is detected, 262144 limit of open files will be set for the disk cache.
Exception in thread "main" com.orientechnologies.orient.core.exception.OSerializationException: Error serializing object of class class com.bt.OrientdBNSD.ParseParse1111.beans.NodeParams
DB name="NSDObjStore"
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.serializeObject(OObjectEntitySerializer.java:150)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.typeToStream(OObjectEntitySerializer.java:819)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.multiValueToStream(OObjectEntitySerializer.java:1402)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.typeToStream(OObjectEntitySerializer.java:810)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.toStream(OObjectEntitySerializer.java:1221)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.serializeObject(OObjectEntitySerializer.java:148)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.typeToStream(OObjectEntitySerializer.java:819)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.toStream(OObjectEntitySerializer.java:1221)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.serializeObject(OObjectEntitySerializer.java:148)
at com.orientechnologies.orient.object.db.OObjectDatabaseTx.save(OObjectDatabaseTx.java:499)
at com.orientechnologies.orient.object.db.OObjectDatabaseTx.save(OObjectDatabaseTx.java:444)
at com.bt.OrientdBNSD.ParseParse1111.beans.Main.createDOC(Main.java:39)
at com.bt.OrientdBNSD.ParseParse1111.beans.Main.parseYaml(Main.java:33)
at com.bt.OrientdBNSD.ParseParse1111.beans.Main.main(Main.java:21)
Caused by: java.lang.IllegalArgumentException: Type EMBEDDED must be a multi value type (collection or map)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.multiValueToStream(OObjectEntitySerializer.java:1381)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.typeToStream(OObjectEntitySerializer.java:810)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.multiValueToStream(OObjectEntitySerializer.java:1402)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.typeToStream(OObjectEntitySerializer.java:810)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.multiValueToStream(OObjectEntitySerializer.java:1402)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.typeToStream(OObjectEntitySerializer.java:810)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.multiValueToStream(OObjectEntitySerializer.java:1402)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.typeToStream(OObjectEntitySerializer.java:810)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.multiValueToStream(OObjectEntitySerializer.java:1402)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.typeToStream(OObjectEntitySerializer.java:810)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.toStream(OObjectEntitySerializer.java:1221)
at com.orientechnologies.orient.object.enhancement.OObjectEntitySerializer.serializeObject(OObjectEntitySerializer.java:148)
... 13 more

[surendrayadav15]

package com.bt.OrientdBNSD.ParseParse1111.beans;

import java.io.FileNotFoundException;
import java.io.InputStream;

import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.constructor.Constructor;

import com.esotericsoftware.yamlbeans.YamlException;
import com.orientechnologies.orient.object.db.OObjectDatabaseTx;

public class Main {

public static void main(String args[]) throws FileNotFoundException, YamlException{
	Main main = new Main();
	main.parseYaml();
	
}

/**
 * @param fileName
 * @throws FileNotFoundException
 * @throws YamlException
 * This method will be parsing yaml file and create NetworkServiceDescriptor Object to store in OrientDB
 */
public  void parseYaml() throws FileNotFoundException, YamlException{
	
	Yaml yaml = new Yaml(new Constructor(NetworkServiceDescriptor.class));
	InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("Test.yaml");
	
	NetworkServiceDescriptor nsd =  (NetworkServiceDescriptor) yaml.load(inputStream);
	System.out.println(nsd);
	//DB call
	createDOC(nsd);

}

/**
 * @param nsd
 * get DB connection and store value in OrientDB
 */
private void createDOC(NetworkServiceDescriptor nsd) {
	OObjectDatabaseTx db = getDBConnection();
	db.getEntityManager().registerEntityClasses("com.bt.OrientdBNSD.ParseParse1111.beans");
	db.save(nsd);
	db.commit();
	
}

/**
 * @return
 * DB Connection created using OObjectDatabaseT
 */
public static OObjectDatabaseTx getDBConnection() {

	OObjectDatabaseTx db = new OObjectDatabaseTx("remote:localhost/NSDObjStore").open("root", "root");
	return db;
}

}

package com.bt.OrientdBNSD.ParseParse1111.beans;

public class NetworkServiceDescriptor {
public TopologyTemplate topology_template;

public TopologyTemplate getTopology_template() {
	return topology_template;
}

public void setTopology_template(TopologyTemplate topology_template) {
	this.topology_template = topology_template;
}

}

package com.bt.OrientdBNSD.ParseParse1111.beans;

import java.util.Map;

public class TopologyTemplate {

private Map<String,NodeParams> node_templates;

public Map<String, NodeParams> getNode_templates() {
	return node_templates;
}

public void setNode_templates(Map<String, NodeParams> node_templates) {
	this.node_templates = node_templates;
}

}

package com.bt.OrientdBNSD.ParseParse1111.beans;

import java.util.Map;

public class NodeParams {
private String type;
private Map<String,Map<String,Object>> interfaces;

public String getType() {
	return type;
}

public void setType(String type) {
	this.type = type;
}

public Map<String, Map<String, Object>> getInterfaces() {
	return interfaces;
}

public void setInterfaces(Map<String, Map<String, Object>> interfaces) {
	this.interfaces = interfaces;
}

}