com.tinkerpop.gremlin.hadoop.structure.HadoopEdge Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of hadoop-gremlin Show documentation

The newest version!

package com.tinkerpop.gremlin.hadoop.structure;

import com.tinkerpop.gremlin.structure.Direction;
import com.tinkerpop.gremlin.structure.Edge;
import com.tinkerpop.gremlin.structure.Property;
import com.tinkerpop.gremlin.structure.Vertex;
import com.tinkerpop.gremlin.structure.util.wrapped.WrappedEdge;
import com.tinkerpop.gremlin.util.iterator.IteratorUtils;

import java.util.Iterator;

/**
 * @author Marko A. Rodriguez (http://markorodriguez.com)
 */
public class HadoopEdge extends HadoopElement implements Edge, Edge.Iterators, WrappedEdge {

    protected HadoopEdge() {
    }

    public HadoopEdge(final Edge edge, final HadoopGraph graph) {
        super(edge, graph);
    }

    @Override
    public Edge getBaseEdge() {
        return (Edge) this.baseElement;
    }

    @Override
    public Edge.Iterators iterators() {
        return this;
    }

    @Override
    public Iterator vertexIterator(final Direction direction) {
        switch (direction) {
            case OUT:
                return IteratorUtils.of(this.graph.iterators().vertexIterator(getBaseEdge().iterators().vertexIterator(Direction.OUT).next().id())).next();
            case IN:
                return IteratorUtils.of(this.graph.iterators().vertexIterator(getBaseEdge().iterators().vertexIterator(Direction.IN).next().id())).next();
            default: {
                final Iterator iterator = getBaseEdge().iterators().vertexIterator(Direction.BOTH);
                return IteratorUtils.of(this.graph.iterators().vertexIterator(iterator.next().id()).next(), this.graph.iterators().vertexIterator(iterator.next().id()).next());
            }
        }
    }

    @Override
    public  Iterator> propertyIterator(final String... propertyKeys) {
        return IteratorUtils., Property>map(this.getBaseEdge().iterators().propertyIterator(propertyKeys), property -> new HadoopProperty<>(property, HadoopEdge.this));
    }
}