How to use

addPipe

method

in

com.tinkerpop.gremlin.java.GremlinPipeline

/**
 * Add an arbitrary pipe to the GremlinPipeline
 *
 * @param pipe the pipe to add to the pipeline
 * @param <T>  the type of the end of the pipe
 * @return the extended Pipeline
 */
public <T> GremlinPipeline<S, T> add(final Pipe<?, T> pipe) {
  this.addPipe(pipe);
  return (GremlinPipeline<S, T>) this;
}

public static GremlinPipeline optimizePipelineForQuery(final GremlinPipeline pipeline, final Pipe pipe) {
  if (!optimizePipelineForGraphQuery(pipeline, pipe))
    if (!optimizePipelineForVertexQuery(pipeline, pipe))
      pipeline.addPipe(pipe);
  return pipeline;
}

    queryPipe.setHighRange(((RangeFilterPipe) pipe).getHighRange());
  pipeline.addPipe(new IdentityPipe());
  return true;
} else {

  private static boolean optimizePipelineForGraphQuery(final GremlinPipeline pipeline, final Pipe pipe) {
    GraphQueryPipe queryPipe = null;
    for (int i = pipeline.size() - 1; i > 0; i--) {
      final Pipe temp = pipeline.get(i);
      if (temp instanceof GraphQueryPipe) {
        queryPipe = (GraphQueryPipe) temp;
        break;
      } else if (!(temp instanceof IdentityPipe))
        break;
    }

    if (null != queryPipe) {
      if (pipe instanceof PropertyFilterPipe) {
        final PropertyFilterPipe temp = (PropertyFilterPipe) pipe;
        queryPipe.addHasContainer(new QueryPipe.HasContainer(temp.getKey(), temp.getPredicate(), temp.getValue()));
      } else if (pipe instanceof IntervalFilterPipe) {
        final IntervalFilterPipe temp = (IntervalFilterPipe) pipe;
        queryPipe.addIntervalContainer(new QueryPipe.IntervalContainer(temp.getKey(), temp.getStartValue(), temp.getEndValue()));
      } else if (pipe instanceof RangeFilterPipe) {
        queryPipe.setLowRange(((RangeFilterPipe) pipe).getLowRange());
        queryPipe.setHighRange(((RangeFilterPipe) pipe).getHighRange());
      }
      pipeline.addPipe(new IdentityPipe());
      return true;
    } else {
      return false;
    }
  }
}