| /* |
| * 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.asterix.external.library; |
| |
| import org.apache.asterix.external.library.java.JObjects.JDouble; |
| import org.apache.asterix.external.library.java.JObjects.JPoint; |
| import org.apache.asterix.external.library.java.JObjects.JRecord; |
| import org.apache.asterix.external.library.java.JObjects.JString; |
| import org.apache.asterix.external.library.java.JObjects.JUnorderedList; |
| import org.apache.asterix.external.api.IExternalScalarFunction; |
| import org.apache.asterix.external.api.IFunctionHelper; |
| import org.apache.asterix.external.library.java.JTypeTag; |
| import org.apache.asterix.external.util.Datatypes; |
| |
| public class AddHashTagsFunction implements IExternalScalarFunction { |
| |
| private JUnorderedList list = null; |
| private JPoint location = null; |
| |
| @Override |
| public void initialize(IFunctionHelper functionHelper) { |
| list = new JUnorderedList(functionHelper.getObject(JTypeTag.STRING)); |
| location = new JPoint(0, 0); |
| } |
| |
| @Override |
| public void deinitialize() { |
| } |
| |
| @Override |
| public void evaluate(IFunctionHelper functionHelper) throws Exception { |
| list.clear(); |
| JRecord inputRecord = (JRecord) functionHelper.getArgument(0); |
| JString text = (JString) inputRecord.getValueByName(Datatypes.Tweet.MESSAGE); |
| JDouble latitude = (JDouble) inputRecord.getValueByName(Datatypes.Tweet.LATITUDE); |
| JDouble longitude = (JDouble) inputRecord.getValueByName(Datatypes.Tweet.LONGITUDE); |
| |
| if (latitude != null && longitude != null) { |
| location.setValue(latitude.getValue(), longitude.getValue()); |
| } else { |
| location.setValue(0, 0); |
| } |
| |
| String[] tokens = text.getValue().split(" "); |
| for (String tk : tokens) { |
| if (tk.startsWith("#")) { |
| JString newField = (JString) functionHelper.getObject(JTypeTag.STRING); |
| newField.setValue(tk); |
| list.add(newField); |
| } |
| } |
| |
| JRecord outputRecord = (JRecord) functionHelper.getResultObject(); |
| outputRecord.setField(Datatypes.Tweet.ID, inputRecord.getValueByName(Datatypes.Tweet.ID)); |
| |
| JRecord userRecord = (JRecord) inputRecord.getValueByName(Datatypes.Tweet.USER); |
| outputRecord.setField(Datatypes.ProcessedTweet.USER_NAME, |
| userRecord.getValueByName(Datatypes.Tweet.SCREEN_NAME)); |
| |
| outputRecord.setField(Datatypes.ProcessedTweet.LOCATION, location); |
| outputRecord.setField(Datatypes.Tweet.CREATED_AT, inputRecord.getValueByName(Datatypes.Tweet.CREATED_AT)); |
| outputRecord.setField(Datatypes.Tweet.MESSAGE, text); |
| outputRecord.setField(Datatypes.ProcessedTweet.TOPICS, list); |
| |
| inputRecord.addField(Datatypes.ProcessedTweet.TOPICS, list); |
| functionHelper.setResult(outputRecord); |
| } |
| |
| } |