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| <?php declare(strict_types = 1); | |
| /* | |
| * Copyright (c) 2018, Josef Kufner <josef@kufner.cz> | |
| * | |
| * 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. | |
| * | |
| */ | |
| namespace Smalldb\Graph; | |
| class Graph extends NestedGraph | |
| { | |
| public function __construct(array $attrs = []) | |
| { | |
| parent::__construct(null, $attrs); | |
| $this->rootGraph = $this; | |
| $this->nodeAttrIndex = new ElementAttrIndex(Node::class); | |
| $this->edgeAttrIndex = new ElementAttrIndex(Edge::class); | |
| } | |
| public function createNestedGraph(Node $parentNode): NestedGraph | |
| { | |
| return new NestedGraph($parentNode); | |
| } | |
| public function getNodeById(string $id): Node | |
| { | |
| $node = $this->nodeAttrIndex->getElementById($id); | |
| if ($node instanceof Node) { | |
| return $node; | |
| } else { | |
| throw new \LogicException("The requested element is not a node: $id"); //@codeCoverageIgnore | |
| } | |
| } | |
| public function getEdgeById(string $id): Edge | |
| { | |
| $edge = $this->edgeAttrIndex->getElementById($id); | |
| if ($edge instanceof Edge) { | |
| return $edge; | |
| } else { | |
| throw new \LogicException("The requested element is not an edge: $id"); //@codeCoverageIgnore | |
| } | |
| } | |
| /** | |
| * Get all nodes in the graph, including nodes in nested graphs. | |
| * | |
| * @return Node[] | |
| */ | |
| public function getAllNodes(): array | |
| { | |
| /** @var Node[] $nodes */ | |
| $nodes = $this->nodeAttrIndex->getAllElements(); | |
| return $nodes; | |
| } | |
| /** | |
| * Get all edges in the graph, including edges in nested graphs. | |
| * | |
| * @return Edge[] | |
| */ | |
| public function getAllEdges(): array | |
| { | |
| /** @var Edge[] $edges */ | |
| $edges = $this->edgeAttrIndex->getAllElements(); | |
| return $edges; | |
| } | |
| /** | |
| * Get nodes which have attribute $key equal to $value | |
| * | |
| * @param string $key | |
| * @param mixed $value | |
| * @return Node[] | |
| */ | |
| public function getNodesByAttr(string $key, $value = true): array | |
| { | |
| return $this->nodeAttrIndex->getElements($key, $value); | |
| } | |
| /** | |
| * Get edges which have attribute $key equal to $value | |
| * | |
| * @param string $key | |
| * @param mixed $value | |
| * @return Node[] | |
| */ | |
| public function getEdgesByAttr(string $key, $value = true): array | |
| { | |
| return $this->edgeAttrIndex->getElements($key, $value); | |
| } | |
| public function indexNodeAttr($key): NestedGraph | |
| { | |
| $this->nodeAttrIndex->createAttrIndex($key); | |
| return $this; | |
| } | |
| public function indexEdgeAttr($key): NestedGraph | |
| { | |
| $this->edgeAttrIndex->createAttrIndex($key); | |
| return $this; | |
| } | |
| } |