Neo4J核心API

•GraphDatabaseService

•TransactionbeginTx()

•NodecreateNode()

•NodegetNodeById(long id)

•RelationshipgetRelationshipById(long id)

•IndexManagerindex()

•EmbeddedGraphDatabase（implement）

•EmbeddedReadOnlyGraphDatabase（implement）

•Transaction

•tx.success();

•tx.finish();

 

•IndexManager

•booleanexistsForNodes(StringindexName)

•booleanexistsForRelationships(StringindexName)

•Index<Node>forNodes(StringindexName)

•RelationshipIndexforRelationships(StringindexName)

•Index

•voidadd(T entity, String key, Object value)

•voiddelete()

•voidremove(T entity)

•voidremove(T entity, String key)

•voidremove(T entity, String key, Object value)

•TraversalDescription

•TraversalDescriptionbreadthFirst()

•TraversalDescriptiondepthFirst()

•TraversalDescriptionevaluator(Evaluator evaluator)

•TraversalDescription evaluator(PathEvaluator evaluator)

•TraversalDescription relationships(RelationshipType type, Direction direction)

•TraversalDescriptionsort(Comparator<? super Path> comparator)

•Traverser traverse(Node... startNode)

•TraversalDescriptionuniqueness(UniquenessFactory uniqueness, Object parameter)

•QueryContext

•QueryContext(ObjectqueryOrQueryObject)

•static QueryContext numericRange(String key, Number from, Number to)

•static QueryContext numericRange(String key, Number from, Number to, booleanincludeFrom, booleanincludeTo)

•QueryContext sort(org.apache.lucene.search.Sort sorting)

•QueryContext sort(String key, String... additionalKeys)

•QueryContext sortByScore()

•QueryContext sortNumeric(String key, boolean reversed)

•QueryContext top(int numberOfTopHits)

•QueryContext tradeCorrectnessForSpeed()

•QueryContext：demo

•Index<Node>.query( “title”,“Matrix”);

•Index<Node>.query( "title", new QueryContext( "*" ).sort( "title" ));

•Index<Node>.query( newQueryContext( "title:*" ).sort( "year", "title" ) ); 

•Index<Node>.query( "title", new QueryContext( "The*" ).sortByScore() );

•Index<Node>.query( newTermQuery( new Term( "name", "Keanu Reeves" ) )).

•Index<Node>.query( newWildcardQuery( new Term( "title", "The Matrix*" ) ) );

•Index<Node>.query( "title:*Matrix* AND year:1999" );

•new QueryContext( "title:*Matrix* year:1999").defaultOperator(Operator.AND );