AbstractImporterProvider.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2022 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
package org.turro.importer;
 
import java.io.IOException;
import java.io.Reader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.turro.csv.CSVs;
import org.turro.ws.WsMember;
 
public abstract class AbstractImporterProvider implements ImporterProvider {
 
  private final String name, service;
  
  private boolean fullImport;
  
  private ImporterDataType type = ImporterDataType.CSV;
  private List<String> headers;
  private List<ImporterRegister> data;
  
  public AbstractImporterProvider(String name, String service) {
    this.name = name;
    this.service = service;
  }
 
  @Override
  public String getName() {
    return name;
  }
 
  @Override
  public String getService() {
    return service;
  }
 
  @Override
  public boolean inRole() {
    return isInRole();
  }
 
  @Override
  public void setType(ImporterDataType type) {
    this.type = type;
  }
 
  @Override
  public void setType(String fileName) {
    if(fileName.toLowerCase().endsWith("csv")) {
      type = ImporterDataType.CSV;
    } else if(fileName.toLowerCase().endsWith("tdf")) {
      type = ImporterDataType.TDF;
    }
  }
 
  @Override
  public void clear() {
    data = new ArrayList<>();
    headers = new ArrayList<>();
  }
 
  @Override
  public void setFullImport(boolean fullImport) {
    this.fullImport = fullImport;
  }
 
  @Override
  public boolean isFullImport() {
    return fullImport;
  }
 
  @Override
  public void importData(Reader reader) {
    data.addAll(importDataFrom(reader));
  }
 
  @Override
  public List<String> getHeaders() {
    return headers;
  }
 
  @Override
  public List<ImporterRegister> getData() {
    return data;
  }
 
  @Override
  public void processData(WsMember member) {
    process(member, data);
  }
 
  protected List<ImporterRegister> importDataFrom(Reader reader) {
    try {
      if(type.equals(ImporterDataType.CSV) || type.equals(ImporterDataType.TDF)) {
        CSVs csv = type.equals(ImporterDataType.CSV) ? CSVs.cvs().reader(reader) : CSVs.tdf().reader(reader);
        List<Map<String, String>> values = csv.parse();
        headers = csv.getRealHeaders();
        return values.stream().map(register -> ImporterRegister.from(new HashMap<String, Object>(register))).toList();
      }
    } catch (IOException ex) {
      Logger.getLogger(AbstractImporterProvider.class.getName()).log(Level.SEVERE, null, ex);
    }
    return Collections.EMPTY_LIST;
  }
 
  protected abstract void process(WsMember member, List<ImporterRegister> data);
  protected abstract boolean isInRole();
 
}