es.usc.citius.hipster.thirdparty.graphs.blueprints.BlueprintsHipsterGraphAdapter.java Source code

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Here is the source code for es.usc.citius.hipster.thirdparty.graphs.blueprints.BlueprintsHipsterGraphAdapter.java

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/*
 * Copyright 2014 CITIUS <http://citius.usc.es>, University of Santiago de Compostela.
 *
 *    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.
 */

package es.usc.citius.hipster.thirdparty.graphs.blueprints;

import com.google.common.base.Function;
import com.google.common.collect.Iterables;
import com.tinkerpop.blueprints.Direction;
import com.tinkerpop.blueprints.Edge;
import com.tinkerpop.blueprints.Graph;
import com.tinkerpop.blueprints.Vertex;
import es.usc.citius.hipster.util.graph.GraphEdge;
import es.usc.citius.hipster.util.graph.HipsterGraph;

import javax.annotation.Nullable;

/**
 * Simple graph adapter between a Blueprints graph and a HipsterGraph.
 */
public class BlueprintsHipsterGraphAdapter implements HipsterGraph<Vertex, Edge> {
    private Graph graph;

    public BlueprintsHipsterGraphAdapter(Graph graph) {
        this.graph = graph;
    }

    @Override
    public Iterable<GraphEdge<Vertex, Edge>> edges() {
        return convertEdges(graph.getEdges());
    }

    @Override
    public Iterable<Vertex> vertices() {
        return graph.getVertices();
    }

    @Override
    public Iterable<GraphEdge<Vertex, Edge>> edgesOf(Vertex vertex) {
        return convertEdges(vertex.getEdges(Direction.BOTH));
    }

    protected static Iterable<GraphEdge<Vertex, Edge>> convertEdges(Iterable<Edge> edges) {
        return Iterables.transform(edges, new Function<Edge, GraphEdge<Vertex, Edge>>() {
            @Override
            public GraphEdge<Vertex, Edge> apply(@Nullable Edge edge) {
                return new GraphEdge<Vertex, Edge>(edge.getVertex(Direction.IN), edge.getVertex(Direction.OUT),
                        edge);
            }
        });
    }
}