如何使用Spring Data Neo4j在NodeEntity中持久保存Map（java.util.Map）对象？

Question

I need to save an Map<Object,List<Object>> when i populated the containing class the node gets saved but the Map is not.

Here is the code I am using for the entity

    @NodeEntity
    public class UserAlias{
        @GraphId
        private Long id;

        @Fetch
        private Map<IdentityType,List<Permission>> aliases;

        private String name;

    }
......
    userAliasRepo.save(userAlias)

IdentityType is an Enum and Permission is a another Class not annotated with @NodeEntity and userAliasRepo extends GraphRepository <>

So How can I persist the Map,I am Spring Data Neo4j version 3.3.0.RELEASE

What i want to achieve is to relate the following json to the UserAlias NodeEntity

{
    "name": "Bond",
    "permissions": {
        "Level5Acess": {
            "READ": false,
            "WRITE": false,
            "CREATE": false,
            "DEL": true
        },
        "Level4Acess": {
            "READ": false,
            "WRITE": false,
            "CREATE": false,
            "DEL": true
        },
        "Level1Acess": {
            "READ": true,
            "WRITE": true,
            "CREATE": true,
            "DEL": true
        },
        "Level0Acess": {
            "READ": true,
            "WRITE": true,
            "CREATE": true,
            "DEL": true
        }
    }
}

Answer 1

as @frant.hartm specified

Other collection types than Set are not supported so far, also currently NO Map>.

But org.springframework.data.neo4j.fieldaccess.DynamicProperties can be used instead of the Map which is then mapped to node-attributes.The only tradeoff is that this only supports primitive dataTypes and their corressponding array.

@NodeEntity
public class Person {
    @GraphId
    private Long graphId;

    private DynamicProperties personalProperties;
    public void setProperty(String key, Object value) {
        personalProperties.setProperty(key, value);
    }

    public Object getProperty(String key) {
        return personalProperties.getProperty(key);
    }
}
@Test
    public void testCreateOutsideTransaction() {
        Person p = new Person("James", 35);
        p.setProperty("s", "String");
        p.setProperty("x", 100);
        p.setProperty("pi", 3.1415);
        persist(p);
        assertEquals(3, IteratorUtil.count(p.getPersonalProperties().getPropertyKeys()));
        assertProperties(nodeFor(p));
        p.setProperty("s", "String two");
        persist(p);
        assertEquals("String two", nodeFor(p).getProperty("personalProperties-s"));
    }

http://forum.spring.io/forum/spring-projects/data/nosql/117145-spring-data-neo4j-how-to-map-java-util-map-string-string-field

Answer 2

This is not supported in 3.x versions:

Other collection types than Set are not supported so far, also currently NO Map<RelationshipType,Set<NodeBacked>> .

http://docs.spring.io/spring-data/data-neo4j/docs/3.4.0.RELEASE/reference/html/#reference_programming_model_relationships_relatedto