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'jdbacl' stands for 'Java DataBase ACcess Layer' and provides utilities for accessing JDBC databases from Java programs, retrieving meta information in an object model and querying database data. 'rapiddweller jdbacl' is forked from Databene jdbacl by Volker Bergmann.

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/*
 * (c) Copyright 2010-2011 by Volker Bergmann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted under the terms of the
 * GNU General Public License (GPL).
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
 * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
 * HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package com.rapiddweller.jdbacl.identity.mem;

import com.rapiddweller.jdbacl.identity.IdentityModel;
import com.rapiddweller.jdbacl.identity.KeyMapper;
import com.rapiddweller.jdbacl.model.Database;

import java.sql.Connection;
import java.util.HashMap;
import java.util.Map;

/**
 * In-memory implementation of the mapping functionality needed for source databases.


 * Created: 24.08.2010 11:28:44
 *
 * @author Volker Bergmann
 * @since 0.6.4
 */
public class SourceDatabaseMapper {

  /**
   * The Root.
   */
  final KeyMapper root;
  /**
   * The Connection.
   */
  final Connection connection;
  /**
   * The Db id.
   */
  final String dbId;
  /**
   * The Table mappers.
   */
  final Map tableMappers;
  /**
   * The Database.
   */
  final Database database;

  /**
   * Instantiates a new Source database mapper.
   *
   * @param root       the root
   * @param connection the connection
   * @param dbId       the db id
   * @param database   the database
   */
  public SourceDatabaseMapper(KeyMapper root, Connection connection, String dbId, Database database) {
    this.root = root;
    this.connection = connection;
    this.dbId = dbId;
    this.database = database;
    this.tableMappers = new HashMap<>(500);
  }

  // interface -------------------------------------------------------------------------------------------------------

  /**
   * Store.
   *
   * @param table      the table
   * @param sourcePK   the source pk
   * @param naturalKey the natural key
   * @param targetPK   the target pk
   */
  public void store(IdentityModel table, Object sourcePK, String naturalKey, Object targetPK) {
    getOrCreateTableMapper(table).store(sourcePK, naturalKey, targetPK);
  }

  /**
   * Gets target pk.
   *
   * @param table    the table
   * @param sourcePK the source pk
   * @return the target pk
   */
  public Object getTargetPK(IdentityModel table, Object sourcePK) {
    return getOrCreateTableMapper(table).getTargetPK(sourcePK);
  }

  /**
   * Gets natural key.
   *
   * @param identity the identity
   * @param sourcePK the source pk
   * @return the natural key
   */
  public String getNaturalKey(IdentityModel identity, Object sourcePK) {
    return getOrCreateTableMapper(identity).getNaturalKey(sourcePK);
  }

  // helper methods --------------------------------------------------------------------------------------------------

  private SourceTableMapper getOrCreateTableMapper(IdentityModel identity) {
    String tableName = identity.getTableName();
    SourceTableMapper mapper = tableMappers.get(tableName);
    if (mapper == null) {
      mapper = new SourceTableMapper(root, connection, dbId, identity, database);
      tableMappers.put(tableName, mapper);
    }
    return mapper;
  }

}