/**
* Copyright (c) 2002-2013 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel;
import org.neo4j.graphdb.Direction;
import org.neo4j.graphdb.Expander;
import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Relationship;
import org.neo4j.graphdb.RelationshipType;
import org.neo4j.helpers.Pair;
import org.neo4j.helpers.Predicate;
// Tentative Expansion API
interface Expansion<T> extends Iterable<T>
{
Expander expander();
Expansion<Node> nodes();
Expansion<Relationship> relationships();
Expansion<Pair<Relationship, Node>> pairs();
Expansion<T> including( RelationshipType type );
Expansion<T> including( RelationshipType type, Direction direction );
Expansion<T> excluding( RelationshipType type );
Expansion<T> filterNodes( Predicate<? super Node> filter );
Expansion<T> filterRelationships( Predicate<? super Relationship> filter );
boolean isEmpty();
T getSingle();
}