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.input.record.converter;
  
  import static org.apache.asterix.common.utils.CSVConstants.KEY_DELIMITER;
  
  import java.util.Arrays;
  import java.util.Map;
  
  import org.apache.asterix.common.exceptions.AsterixException;
  import org.apache.asterix.external.api.IExternalDataRuntimeContext;
  import org.apache.asterix.external.api.IRecordConverter;
  import org.apache.asterix.external.input.record.RecordWithMetadataAndPK;
  import org.apache.asterix.external.util.ExternalDataConstants;
  import org.apache.asterix.om.types.ARecordType;
  import org.apache.asterix.om.types.IAType;
  
  public class CSVWithRecordConverterFactory implements IRecordConverterFactory<char[], RecordWithMetadataAndPK<char[]>> {
  
      private static final long serialVersionUID = 1L;
      private int recordIndex;
      private char delimiter;
      private ARecordType metaType;
      private ARecordType recordType;
      private int[] keyIndicators;
      private int[] keyIndexes;
      private IAType[] keyTypes;
  
      @Override
      public IRecordConverter<char[], RecordWithMetadataAndPK<char[]>> createConverter(
              IExternalDataRuntimeContext context) {
          return new CSVToRecordWithMetadataAndPKConverter(recordIndex, delimiter, metaType, recordType, keyIndicators,
                  keyIndexes, keyTypes, context);
      }
  
      @Override
      public void configure(final Map<String, String> configuration) throws AsterixException {
          //validate and set
          String property = configuration.get(ExternalDataConstants.KEY_RECORD_INDEX);
          if (property == null) {
              throw new AsterixException(
                      "Unspecified " + ExternalDataConstants.KEY_RECORD_INDEX + " for csv to csv with record converter");
          }
          recordIndex = Integer.parseInt(property);
          property = configuration.get(KEY_DELIMITER);
          if (property == null) {
              throw new AsterixException("Unspecified " + KEY_DELIMITER + " for csv to csv with record converter");
          }
          if (property.trim().length() > 1) {
              throw new AsterixException("Large delimiter. The maximum delimiter size = 1");
          }
          delimiter = property.trim().charAt(0);
          // only works for top level keys
          property = configuration.get(ExternalDataConstants.KEY_KEY_INDEXES);
          if (property == null) {
              keyIndexes = null;
              keyIndicators = null;
              keyTypes = null;
          } else {
              final String[] indexes = property.split(",");
              keyIndexes = new int[indexes.length];
              for (int i = 0; i < keyIndexes.length; i++) {
                  keyIndexes[i] = Integer.parseInt(indexes[i].trim());
              }
              // default key indicators point to meta part
              property = configuration.get(ExternalDataConstants.KEY_KEY_INDICATORS);
              if (property == null) {
                  keyIndicators = new int[keyIndexes.length];
                  Arrays.fill(keyIndicators, 1);
              } else {
                  keyIndicators = new int[keyIndexes.length];
                  final String[] indicators = property.split(",");
                  for (int i = 0; i < keyIndicators.length; i++) {
                      keyIndicators[i] = Integer.parseInt(indicators[i].trim());
                      if ((keyIndicators[i] > 1) || (keyIndicators[i] < 0)) {
                          throw new AsterixException("Invalid " + ExternalDataConstants.KEY_KEY_INDICATORS
                                  + " value. Allowed values are only 0 and 1.");
                      }
                  }
                  keyTypes = new IAType[keyIndexes.length];
                  for (int i = 0; i < keyIndicators.length; i++) {
                      if (keyIndicators[i] == 0) {
                          keyTypes[i] = recordType.getFieldTypes()[keyIndexes[i]];
                      } else {
                          keyTypes[i] = metaType.getFieldTypes()[keyIndexes[i]];
                      }
                  }
              }
          }
      }
  
      @Override
      public Class<?> getInputClass() {
          return char[].class;
      }
  
      @Override
      public Class<?> getOutputClass() {
          return char[].class;
      }
  
      @Override
      public void setRecordType(final ARecordType recordType) {
          this.recordType = recordType;
      }
  
      @Override
      public void setMetaType(final ARecordType metaType) {
          this.metaType = metaType;
      }
  }
  