README

Library with common utility classes for Neo4j

Installation

Require the dependencies in your application :

composer require graphaware/neo4j-common

Graph

Label

Object representation of a Node Label.

use GraphAware\Common\Graph\Label;

$label = new Label("User");
echo $label->getName(); // Returns (string) "User"

// or static construction

$label = Label::label("User");

Node

Object Representation of a Node. The node object extends PropertyBag.

use GraphAware\Common\Graph\Node;

$node = new Node(1, array("User", "Person"));
$node->getId(); // Returns (int) 1
$node->getLabels(); // Returns an array of \GraphAware\Common\Graph\Label objects

Relationship

Object Representation of a Relationship. The relationship object extends PropertyBag.

use GraphAware\Common\Graph\Relationship;

$rel = new Relationship(1, RelationshipType::withName("RELATES"), $node, $node2);
echo $rel->getType(); // Returns (string) "RELATES"
var_dump($rel->isType(RelationshipType::withName("RELATES"))); // Returns (bool) true

Direction (Enum) : representation of a Relationship Direction

use GraphAware\Common\Graph\Direction;

$direction = new Direction(Direction::INCOMING);
echo $direction; // Returns (string) "INCOMING"

// Or static call construction

$direction = Direction::OUTGOING;
echo $direction; // Returns (string) "OUTGOING"

Valid values are INCOMING, OUTGOING and BOTH.

RelationshipType

Object representation of a relationship type.

use GraphAware\Common\Graph\RelationshipType;

$relType = RelationshipType::withName("FOLLOWS");
echo $relType->getName(); // Returns (string) "FOLLOWS"
echo (string) $relType; // implements __toString method : Returns (string) "FOLLOWS"

Cypher

Statement and StatementCollection

Utility classes representing Cypher's statements. Both Statement and StatementCollection classes are taggable.

Contains also StatementInterface and StatementCollectionInterface used in most GraphAware's PHP libraries.

Statement

Represents a Cypher statement with a query and an array of parameters. Also the Statement accepts a tag argument default to null;

use GraphAware\Common\Cypher\Statement;

$statement = Statement::create("MATCH (n) WHERE id(n) = {id} RETURN n", array("id" => 324));

echo $statement->getQuery(); // Returns (string) "MATCH (n) WHERE id(n) = {id} RETURN n"
echo count($statement->getParameters()); // Returns (int) 1

StatementCollection

Represents a collection of Statement objects. Is also Taggable.

use GraphAware\Common\Cypher\Statement
    GraphAware\Common\Cypher\StatementCollection;

$collection = new StatementCollection();
$collection->add(Statement::create("MATCH (n) RETURN count(n)"));

print_r($collection->getStatements());
echo $collection->isEmpty();

License

Apache License 2.0

Copyright 2015 Graphaware Limited

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Support

Standard Community Support through the Github Issues and PR's workflow.

Enterprise support via your first level support contact.

graphaware / neo4j-common

Maintainers

Details