blob: cdd1ad14192b07ff80824a593ff94cc82597a9da [file] [log] [blame]
/**
* 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
* <p/>
* http://www.apache.org/licenses/LICENSE-2.0
* <p/>
* 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.atlas.catalog.projection;
import com.tinkerpop.blueprints.Direction;
import com.tinkerpop.blueprints.Edge;
import com.tinkerpop.blueprints.Vertex;
import com.tinkerpop.pipes.Pipe;
import com.tinkerpop.pipes.PipeFunction;
import com.tinkerpop.pipes.filter.FilterFunctionPipe;
import org.apache.atlas.catalog.TermVertexWrapper;
import org.apache.atlas.catalog.VertexWrapper;
import org.apache.atlas.catalog.definition.EntityTagResourceDefinition;
import org.apache.atlas.catalog.definition.ResourceDefinition;
import org.apache.atlas.repository.Constants;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
/**
* Relation for adjacent Tag vertices.
*/
public class TagRelation extends BaseRelation {
private static ResourceDefinition resourceDefinition = new EntityTagResourceDefinition();
@Override
public Collection<RelationSet> traverse(VertexWrapper vWrapper) {
Vertex v = vWrapper.getVertex();
Collection<VertexWrapper> vertices = new ArrayList<>();
for (Edge e : v.getEdges(Direction.OUT)) {
if (e.getLabel().startsWith(v.<String>getProperty(Constants.ENTITY_TYPE_PROPERTY_KEY))) {
VertexWrapper trait = new TermVertexWrapper(e.getVertex(Direction.IN));
if (trait.getPropertyKeys().contains("available_as_tag") && ! isDeleted(trait.getVertex())) {
vertices.add(trait);
}
}
}
return Collections.singletonList(new RelationSet("tags", vertices));
}
@Override
public Pipe asPipe() {
return new FilterFunctionPipe<>(new PipeFunction<Edge, Boolean>() {
@Override
public Boolean compute(Edge edge) {
String name = edge.getVertex(Direction.OUT).getProperty(Constants.ENTITY_TYPE_PROPERTY_KEY);
if (edge.getLabel().startsWith(name)) {
VertexWrapper v = new TermVertexWrapper(edge.getVertex(Direction.IN));
return v.getPropertyKeys().contains("available_as_tag") && ! isDeleted(v.getVertex());
} else {
return false;
}
}
});
}
@Override
public ResourceDefinition getResourceDefinition() {
return resourceDefinition;
}
}