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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 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 a target database.


 * Created: 24.08.2010 11:15:53
 *
 * @author Volker Bergmann
 * @since 0.6.4
 */
public class TargetDatabaseMapper {

  /**
   * The Root.
   */
  final KeyMapper root;
  /**
   * The Target.
   */
  final Connection target;
  /**
   * The Target db id.
   */
  final String targetDbId;
  /**
   * The Database.
   */
  final Database database;
  /**
   * The Table mappers.
   */
  final Map tableMappers;

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

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

  /**
   * Gets db id.
   *
   * @return the db id
   */
  public String getDbId() {
    return targetDbId;
  }

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

  /**
   * 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(target, targetDbId, identity).getNaturalKey(sourcePK);
  }

  /**
   * Gets target pk.
   *
   * @param identity   the identity
   * @param naturalKey the natural key
   * @return the target pk
   */
  public Object getTargetPK(IdentityModel identity, String naturalKey) {
    return getOrCreateTableMapper(target, targetDbId, identity).getTargetId(naturalKey);
  }

  // helpers ---------------------------------------------------------------------------------------------------------

  private TargetTableMapper getOrCreateTableMapper(Connection target, String targetDbId, IdentityModel identity) {
    String tableName = identity.getTableName();
    TargetTableMapper result = tableMappers.get(tableName);
    if (result == null) {
      result = new TargetTableMapper(root, target, targetDbId, identity, database);
      tableMappers.put(tableName, result);
    }
    return result;
  }

}