| /** |
| * 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.atlas.discovery; |
| |
| import org.apache.atlas.AtlasException; |
| import org.apache.atlas.model.discovery.AtlasSuggestionsResult; |
| import org.apache.atlas.repository.graphdb.AtlasGraph; |
| import org.apache.atlas.repository.graphdb.AtlasGraphIndexClient; |
| import org.apache.atlas.type.AtlasTypeRegistry; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.Collections; |
| |
| |
| public class SuggestionsProviderImpl implements SuggestionsProvider { |
| private static final Logger LOG = LoggerFactory.getLogger(SuggestionsProviderImpl.class); |
| |
| private final AtlasGraph graph; |
| private final AtlasTypeRegistry typeRegistry; |
| |
| public SuggestionsProviderImpl(AtlasGraph graph, AtlasTypeRegistry typeRegistry) { |
| this.graph = graph; |
| this.typeRegistry = typeRegistry; |
| } |
| |
| @Override |
| public AtlasSuggestionsResult getSuggestions(String prefixString, String fieldName) { |
| AtlasSuggestionsResult result = new AtlasSuggestionsResult(prefixString, fieldName); |
| |
| try { |
| AtlasGraphIndexClient graphIndexClient = graph.getGraphIndexClient(); |
| String indexFieldName = (fieldName == null) ? null : typeRegistry.getIndexFieldName(fieldName); |
| |
| result.setSuggestions(graphIndexClient.getSuggestions(prefixString, indexFieldName)); |
| } catch (AtlasException e) { |
| LOG.error("Error encountered in performing quick suggestions. Will return no suggestions.", e); |
| |
| result.setSuggestions(Collections.EMPTY_LIST); |
| } |
| |
| return result; |
| } |
| } |