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   *  to you under the Apache License, Version 2.0 (the
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   *    https://www.apache.org/licenses/LICENSE-2.0
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  package org.apache.cayenne.dbsync.reverse.dbload;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Set;
  import java.util.TreeSet;
  
  import org.apache.cayenne.map.DataMap;
  import org.apache.cayenne.map.DbEntity;
  import org.apache.cayenne.dbsync.model.DetectedDbEntity;
  import org.apache.cayenne.map.Procedure;
  
  /**
   * Temporary storage for loaded from DB DbEntities and Procedures.
   * DataMap is used but it's functionality is excessive and
   * there can be unwanted side effects.
   * But we can't get rid of it right now as parallel data structure
   * for dbEntity, attributes, procedures etc.. must be created
   * or some other work around should be implemented because
   * some functionality relies on side effects (e.g. entity resolution
   * in relationship)
   */
  public class DbLoadDataStore extends DataMap {
  
      private Map<String, Set<ExportedKey>> exportedKeys = new HashMap<>();
  
      private Map<String, DbEntity> upperCaseNames = new HashMap<>();
  
      DbLoadDataStore() {
          super("__generated_by_dbloader__");
      }
  
      @Override
      public DbEntity getDbEntity(String dbEntityName) {
          return upperCaseNames.get(dbEntityName.toUpperCase());
      }
  
      @Override
      public void addDbEntity(DbEntity entity) {
          if(!(entity instanceof DetectedDbEntity)) {
              throw new IllegalArgumentException("Only DetectedDbEntity can be inserted in this map");
          }
          super.addDbEntity(entity);
          upperCaseNames.put(entity.getName().toUpperCase(), entity);
      }
  
      DbEntity addDbEntitySafe(DbEntity entity) {
          if(!(entity instanceof DetectedDbEntity)) {
              throw new IllegalArgumentException("Only DetectedDbEntity can be inserted in this map");
          }
          DbEntity old = getDbEntity(entity.getName());
          if(old != null) {
              removeDbEntity(old.getName());
          }
          addDbEntity(entity);
          return old;
      }
  
      void addProcedureSafe(Procedure procedure) {
          Procedure old = getProcedure(procedure.getName());
          if(old != null) {
              removeProcedure(old.getName());
          }
          addProcedure(procedure);
      }
  
      void addExportedKey(ExportedKey key) {
          Set<ExportedKey> exportedKeys = this.exportedKeys.get(key.getStrKey());
          if (exportedKeys == null) {
              exportedKeys = new TreeSet<>();
              this.exportedKeys.put(key.getStrKey(), exportedKeys);
          }
          exportedKeys.add(key);
      }
  
      Set<Map.Entry<String, Set<ExportedKey>>> getExportedKeysEntrySet() {
          return exportedKeys.entrySet();
      }
  }
  