How solve that error: At present, only #Result types that are discovered by the domain entity package scanning can be mapped - spring-boot

Question

I am using spring boot v2.0.0.M6 with neo4j as database, but when i try to make a #QueryResul i see this error: At present, only #Result types that are discovered by the domain entity package scanning can be mapped.
this is the repository
`
package com.dariel.sna.repositories;
import org.springframework.data.repository.PagingAndSortingRepository;
import com.dariel.sna.domain.Character;
import java.util.Collection;
import org.springframework.data.neo4j.annotation.Query;
import org.springframework.data.neo4j.annotation.QueryResult;
import org.springframework.data.neo4j.repository.Neo4jRepository;
import org.springframework.data.repository.query.Param;
import org.springframework.data.rest.core.annotation.RepositoryRestResource;
#RepositoryRestResource(collectionResourceRel = "characters", path = "characters")
public interface CharacterRepository extends Neo4jRepository {
Character findByName(#Param("name") String name);
#Query("match r=(:Character)-[:INTERACTS]-(:Character) return r")
Collection graph();
//-------------------------------------------------------------------------------------------------------------
//centralidad de grado
#Query("MATCH (c:Character {name:{0}}) RETURN c.name AS name, size( (c)-[:INTERACTS]-() ) AS degree")
DegreeCentralityData getCharacterDegreeCentralityByName(String name);
#QueryResult
public class DegreeCentralityData {
private String name;
private Long degree;
}
//----------------------------------------------------------------------------------------------
}
This is the node entity
package com.dariel.sna.domain;
import com.fasterxml.jackson.annotation.JsonIdentityInfo;
import com.fasterxml.jackson.annotation.ObjectIdGenerators;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.neo4j.ogm.annotation.GraphId;
import org.neo4j.ogm.annotation.NodeEntity;
import org.neo4j.ogm.annotation.Relationship;
#JsonIdentityInfo(generator=ObjectIdGenerators.PropertyGenerator.class, property="id")
#NodeEntity(label = "Character")
public class Character {
#GraphId private Long id;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
private String name;
#Relationship(type = "INTERACTS", direction = Relationship.UNDIRECTED)
private List interactions = new ArrayList();
private Character() {
// Empty constructor required as of Neo4j API 2.0.5
};
public Character(String name) {
this.name = name;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Collection getInteractions() {
return interactions;
}
public void addInteraction(Interaction interaction) {
this.interactions.add(interaction);
}
}
this is the error page
org.neo4j.ogm.exception.core.MappingException: Error mapping to ad-hoc class com.dariel.sna.repositories.CharacterRepository$DegreeCentralityData. At present, only #Result types that are discovered by the domain entity package scanning can be mapped.
at org.neo4j.ogm.context.SingleUseEntityMapper.resolveClassInfoFor(SingleUseEntityMapper.java:96) ~[neo4j-ogm-core-3.0.1.jar:na]
at org.neo4j.ogm.context.SingleUseEntityMapper.setPropertiesOnEntity(SingleUseEntityMapper.java:85) ~[neo4j-ogm-core-3.0.1.jar:na]
at org.neo4j.ogm.context.SingleUseEntityMapper.map(SingleUseEntityMapper.java:80) ~[neo4j-ogm-core-3.0.1.jar:na]
at org.springframework.data.neo4j.repository.query.CustomResultConverter.convert(CustomResultConverter.java:54) ~[spring-data-neo4j-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.data.repository.query.ResultProcessor$ChainingConverter.convert(ResultProcessor.java:224) ~[spring-data-commons-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.data.repository.query.ResultProcessor$ChainingConverter.lambda$and$0(ResultProcessor.java:210) ~[spring-data-commons-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.data.repository.query.ResultProcessor$ChainingConverter.convert(ResultProcessor.java:224) ~[spring-data-commons-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.data.repository.query.ResultProcessor.processResult(ResultProcessor.java:166) ~[spring-data-commons-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.data.neo4j.repository.query.GraphRepositoryQuery.doExecute(GraphRepositoryQuery.java:80) ~[spring-data-neo4j-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.data.neo4j.repository.query.AbstractGraphRepositoryQuery.execute(AbstractGraphRepositoryQuery.java:51) ~[spring-data-neo4j-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:570) ~[spring-data-commons-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:554) ~[spring-data-commons-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) ~[spring-aop-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:59) ~[spring-data-commons-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) ~[spring-aop-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:294) ~[spring-tx-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98) ~[spring-tx-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) ~[spring-aop-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139) ~[spring-tx-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) ~[spring-aop-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) ~[spring-aop-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) ~[spring-aop-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.invoke(SurroundingTransactionDetectorMethodInterceptor.java:61) ~[spring-data-commons-2.0.1.RELEASE.jar:2.0.1.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185) ~[spring-aop-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) ~[spring-aop-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at com.sun.proxy.$Proxy90.getCharacterDegreeCentralityByName(Unknown Source) ~[na:na]
at com.dariel.sna.services.SnaService.characterDegreCentralityByName(SnaService.java:68) ~[classes/:na]
at com.dariel.sna.services.SnaService$$FastClassBySpringCGLIB$$62c75dd1.invoke() ~[classes/:na]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:685) ~[spring-aop-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at com.dariel.sna.services.SnaService$$EnhancerBySpringCGLIB$$f8df0cd6.characterDegreCentralityByName() ~[classes/:na]
at com.dariel.sna.controller.SnaController.characterDegreCentralityByName(SnaController.java:52) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_131]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_131]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_131]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_131]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:871) ~[spring-webmvc-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:777) ~[spring-webmvc-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991) ~[spring-webmvc-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925) ~[spring-webmvc-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:978) ~[spring-webmvc-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:881) ~[spring-webmvc-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:855) ~[spring-webmvc-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-embed-websocket-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.0.1.RELEASE.jar:5.0.1.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) ~[tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459) [tomcat-embed-core-8.5.23.jar:8.5.23]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.23.jar:8.5.23]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_131]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_131]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.23.jar:8.5.23]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_131]
this is pom.xml file
http://maven.apache.org/xsd/maven-4.0.0.xsd">
4.0.0
<groupId>com.dariel</groupId>
<artifactId>SNA-Springboot-neo4j</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<spring-data-neo4j.version>4.0.0.RELEASE</spring-data-neo4j.version>
</properties>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.M6</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-neo4j</artifactId>
<exclusions>
<exclusion>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm-http-driver</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm-bolt-driver</artifactId>
<version>${neo4j-ogm.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-rest</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- dependencias para swagger2-->
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.7.0</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.7.0</version>
</dependency>
<!-- For use in testing -->
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm-embedded-driver</artifactId>
<version>${neo4j-ogm.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j</artifactId>
<version>3.3.0</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>

Answer 1

I solved. I moved the #QueryResult class to com.dariel.sna.domain (package that contain all entities class). Then modify the query to return a node and the value of DegreeCentrality and it worked perfectly
This are the codes with the changes
package com.dariel.sna.domain;
import org.springframework.data.neo4j.annotation.QueryResult;
#QueryResult
public class Centrality {
private Character node;
private double score;
public Character getNode() {
return node;
}
public double getScore() {
return score;
}
}
#RepositoryRestResource(collectionResourceRel = "characters", path = "characters")
public interface CharacterRepository extends Neo4jRepository {
//Medidas de centralidad
#Query("MATCH (node:Character {name:{0}}) RETURN node, size( (node)-[:INTERACTS]-() ) AS score")
Centrality findCharacterDegreeCentralityByName(String name);
}