content: /*
   * 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 java.nio.file.Files;
  import java.nio.file.Paths;
  import java.util.ArrayList;
  import java.util.Map;
  
  import org.apache.asterix.external.api.IExternalScalarFunction;
  import org.apache.asterix.external.api.IFunctionHelper;
  import org.apache.asterix.external.library.java.base.JBoolean;
  import org.apache.asterix.external.library.java.base.JRecord;
  import org.apache.asterix.external.library.java.base.JString;
  
  public class KeywordsDetectorFunction implements IExternalScalarFunction {
  
      private ArrayList<String> keywordsList;
      private String dictPath, fieldName;
      private Map<String, String> functionParameters;
  
      @Override
      public void evaluate(IFunctionHelper functionHelper) throws Exception {
          JRecord inputRecord = (JRecord) functionHelper.getArgument(0);
          JRecord outputRecord = (JRecord) functionHelper.getResultObject();
          JBoolean chkVal = new JBoolean(false);
          String fieldValue = ((JString) inputRecord.getValueByName(fieldName)).getValue();
  
          chkVal.setValue(keywordsList.contains(fieldValue));
  
          outputRecord.setField("id", inputRecord.getValueByName("id"));
          outputRecord.setField("sensitive", chkVal);
          functionHelper.setResult(outputRecord);
      }
  
      @Override
      public void initialize(IFunctionHelper functionHelper) throws Exception {
          keywordsList = new ArrayList<>();
          functionParameters = functionHelper.getParameters();
          if (functionParameters.size() < 2) {
              throw new IllegalArgumentException("Expected more parameters. Please check your UDF configuration.");
          }
          dictPath = functionParameters.get("dictPath");
          fieldName = functionParameters.get("fieldName");
          Files.lines(Paths.get(dictPath)).forEach(keyword -> keywordsList.add(keyword));
      }
  
      @Override
      public void deinitialize() {
          // no op
      }
  }
  