Examples with RelationshipVisitor org.neo4j.storageengine.api.RelationshipVisitor used on opensource projects

Example 1 with RelationshipVisitor

use of org.neo4j.storageengine.api.RelationshipVisitor in project neo4j by neo4j.

the class NeoStoresTest method relDelete.

private void relDelete(long id) {
    RelationshipVisitor<RuntimeException> visitor = (relId, type, startNode, endNode) -> transactionState.relationshipDoDelete(relId, type, startNode, endNode);
    if (!transactionState.relationshipVisit(id, visitor)) {
        try (StorageRelationshipScanCursor cursor = storageReader.allocateRelationshipScanCursor(NULL)) {
            cursor.single(id);
            if (!cursor.next()) {
                throw new RuntimeException("Relationship " + id + " not found");
            }
            visitor.visit(id, cursor.type(), cursor.sourceNodeReference(), cursor.targetNodeReference());
        }
    }
}

Example 2 with RelationshipVisitor

use of org.neo4j.storageengine.api.RelationshipVisitor in project neo4j by neo4j.

the class RelationshipModifications method idsAsBatch.

static RelationshipBatch idsAsBatch(LongSet ids, IdDataDecorator idDataDecorator) {
    return new RelationshipBatch() {

        @Override
        public int size() {
            return ids.size();
        }

        @Override
        public boolean isEmpty() {
            return ids.isEmpty();
        }

        @Override
        public boolean contains(long id) {
            return ids.contains(id);
        }

        @Override
        public long first() {
            return ids.longIterator().next();
        }

        @Override
        public <E extends Exception> void forEach(RelationshipVisitor<E> relationship) throws E {
            LongIterator iterator = ids.longIterator();
            while (iterator.hasNext()) {
                long id = iterator.next();
                idDataDecorator.accept(id, relationship);
            }
        }
    };
}