rohankumardubey / rule_matcher

Rule Matcher

Rule Matcher Stored Procedures

This project requires Neo4j 3.2.x

Instructions

This project uses maven, to build a jar-file with the procedure in this project, simply package the project with maven:

mvn clean package

This will produce a jar-file, target/matcher-1.0-SNAPSHOT.jar, that can be copied to the plugin directory of your Neo4j instance.

cp target/rule-matcher-1.0-SNAPSHOT.jar neo4j-enterprise-3.2.3/plugins/.

Edit your Neo4j/conf/neo4j.conf file by adding this line:

dbms.security.procedures.unrestricted=com.maxdemarzi.*    

Restart your Neo4j Server.

Create the Schema by running this stored procedure:

CALL com.maxdemarzi.schema.generate

Create some test data:

CREATE (user1:User {username:'max'})
CREATE (user2:User {username:'jeff'})
CREATE (user3:User {username:'srikant'})
CREATE (user4:User {username:'stephen'})
CREATE (user5:User {username:'todd'})
CREATE (user6:User {username:'tyler'})

CREATE (a1:Attribute {id:'a1'})
CREATE (a2:Attribute {id:'a2'})
CREATE (a3:Attribute {id:'a3'})
CREATE (a4:Attribute {id:'a4'})
CREATE (a5:Attribute {id:'a5'})
CREATE (a6:Attribute {id:'a6'})

CREATE (user1)-[:HAS]->(a1)
CREATE (user1)-[:HAS]->(a2)

CREATE (user2)-[:HAS]->(a3)
CREATE (user2)-[:HAS]->(a4)

CREATE (user3)-[:HAS]->(a1)
CREATE (user3)-[:HAS]->(a3)

CREATE (user4)-[:HAS]->(a1)

CREATE (user5)-[:HAS]->(a5)

CREATE (user6)-[:HAS]->(a5)
CREATE (user6)-[:HAS]->(a6)

Create a rule:

CALL com.maxdemarzi.rules.create('Rule 1', '(a1 & a2) | (a3 & a4)')  # (a1 and a2) or (a3 and a4)
CALL com.maxdemarzi.rules.create('Rule 2', '(a1 & a2) | (a3 & !a4)') # (a1 and a2) or (a3 and NOT a4)

Match a user:

CALL com.maxdemarzi.match.user('max') yield node return node
CALL com.maxdemarzi.match.user('srikant') yield node return node

Match attributes:

CALL com.maxdemarzi.match.attributes(['a1','a2']) yield node return node
CALL com.maxdemarzi.match.attributes(['a1','a3']) yield node return node

See if attributes satisfy a rule:

CALL com.maxdemarzi.rules.satisfy('(a1 & a2) | (a3 & !a4)', ['a1', 'a4']) yield value return value