/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.tinkerpop.gremlin.hadoop.structure.io;
import org.apache.commons.configuration.Configuration;
import org.apache.tinkerpop.gremlin.hadoop.Constants;
import org.apache.tinkerpop.gremlin.process.computer.GraphFilter;
import org.apache.tinkerpop.gremlin.process.computer.util.VertexProgramHelper;
/**
* An input graph class is {@code GraphFilterAware} if it can filter out vertices and edges as its loading the graph from the
* source data. Any input class that is {@code GraphFilterAware} must be able to fully handle both vertex and edge filtering.
* It is assumed that if the input class is {@code GraphFilterAware}, then the respective
* {@link org.apache.tinkerpop.gremlin.process.computer.GraphComputer} will not perform any filtering on the loaded graph.
*
* @author Marko A. Rodriguez (http://markorodriguez.com)
*/
public interface GraphFilterAware {
public void setGraphFilter(final GraphFilter graphFilter);
public static void storeGraphFilter(final Configuration apacheConfiguration, final org.apache.hadoop.conf.Configuration hadoopConfiguration, final GraphFilter graphFilter) {
if (graphFilter.hasFilter()) {
VertexProgramHelper.serialize(graphFilter, apacheConfiguration, Constants.GREMLIN_HADOOP_GRAPH_FILTER);
hadoopConfiguration.set(Constants.GREMLIN_HADOOP_GRAPH_FILTER, apacheConfiguration.getString(Constants.GREMLIN_HADOOP_GRAPH_FILTER));
}
}
}