https://github.com/jexp/graph-wrapper

diverse graph wrappers, for object networks, dom, etc.
https://github.com/jexp/graph-wrapper

Last synced: 5 days ago
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diverse graph wrappers, for object networks, dom, etc.

• Host: GitHub
• URL: https://github.com/jexp/graph-wrapper
• Owner: jexp
• Created: 2011-11-25T18:58:24.000Z (over 14 years ago)
• Default Branch: master
• Last Pushed: 2011-11-25T23:10:58.000Z (over 14 years ago)
• Last Synced: 2025-06-16T02:02:23.958Z (about 1 year ago)
• Language: Java
• Homepage:
• Size: 105 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: Readme.md

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README

          
## purpose

Wrap existing, large in memory object networks behind the Neo4j graph database API's to enable:

* fast traversals

* graph algorithms

* cypher queries

* gremlin expressions

* visualization

* server

## usage

    class User {

        private String twid;

        private Collection tweeted = new ArrayList();

        ...

    }

     class Tag {

        private String name;

        private Collection tagged = new HashSet();

        ...

     }

    class Tweet {

        private String id;

        private String text;

        private long date;

        private User tweeted;

        private Collection tagged = new HashSet();

    }

    user = new User("mesirii");

    neo4j = new Tag("neo");

    graphdb = new Tag("graphdb");

    tweet1 = user.tweet("tweet1", neo4j);

    tweet2 = user.tweet("tweet2", neo4j, graphdb);

    tweet3 = user.tweet("tweet3", graphdb);

    tweet4 = user.tweet("tweet4", graphdb);

    gdb = new ObjectGraphDatabaseService(user);

    allTweets = asList(tweet1, tweet2, tweet3,tweet4);

    ObjectNode tweetNode = gdb.createNode(user);

    Iterable relationships = tweetNode.getRelationships(Direction.OUTGOING, DynamicRelationshipType.withName("tweeted"));

    Iterable tweets = tweetNode.getEndNodeObjects(relationships);

    assertEquals(allTweets, IteratorUtil.asCollection(tweets));

    String query = "start me=node:User(twid={user})

      match me-[:tweeted]->tweet-[:tagged]->tag

      return count(tweet),tag.name order by tag.name asc";

    ExecutionResult result = new ExecutionEngine(gdb).execute(query, map("user", "mesirii"));

## current state

* mostly readonly, some write operations supported

* cypher, traversals, id-lookup, index-lookups work

* no Relationship-Entity support

## ideas

* createNode(type)

* find getNodeById() via traversal not by storing a map

* InstanceIndex which reflects the actual instances

* Relationships for classes with exactly 2 entity-instance fields

* Superclass support ?