if (arr.length < 2) {
throw new IOException("Missing vertex on line " + lineNo);
}
int v1 = vertexIndexer.index(arr[0]);
int v2 = vertexIndexer.index(arr[1]);
g.add(new SimpleDirectedEdge(v1, v2));
if (lineNo % 100000 == 0)
veryVerbose(LOGGER, "read %d lines from %s", lineNo, f);
}
verbose(LOGGER, "Read directed graph with %d vertices and %d edges",
g.order(), g.size());