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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 2011-2012 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.dialect;

import com.rapiddweller.common.exception.ExceptionFactory;
import com.rapiddweller.jdbacl.DatabaseDialect;
import com.rapiddweller.jdbacl.sql.Query;

/**
 * {@link DatabaseDialect} implementation for the MySQL database.


 * Created: 24.06.2011 07:29:20
 *
 * @author Volker Bergmann
 * @since 0.6.9
 */
public class MySQLDialect extends DatabaseDialect {

  private static final String DATE_PATTERN = "''yyyy-MM-dd''";
  private static final String TIME_PATTERN = "''HH:mm:ss''";
  private static final String DATETIME_PATTERN = "''yyyy-MM-dd HH:mm:ss''";

  /**
   * Instantiates a new My sql dialect.
   */
  public MySQLDialect() {
    super("mysql", false, false, DATE_PATTERN, TIME_PATTERN, DATETIME_PATTERN);
  }

  @Override
  public boolean isDefaultCatalog(String catalog, String user) {
    // MySQL does not have a default catalog, so jdbacl has to retrieve it from Connection.getCatalog()
    return false;
  }

  @Override
  public boolean isDefaultSchema(String schema, String user) {
    return false; // MySQL does not make use of schemas at all
  }

  @Override
  public boolean isDeterministicPKName(String pkName) {
    return true; // MySQL always creates deterministic names
  }

  @Override
  public boolean isDeterministicUKName(String ukName) {
    return true; // MySQL always creates deterministic names
  }

  @Override
  public boolean isDeterministicFKName(String fkName) {
    return true; // MySQL always creates deterministic names
  }

  @Override
  public boolean isDeterministicIndexName(String indexName) {
    return true; // MySQL always creates deterministic names
  }

  @Override
  public boolean supportsRegex() {
    return true;
  }

  @Override
  public String regexQuery(String expression, boolean not, String regex) {
    return expression + (not ? " NOT" : "") + " REGEXP '" + regex + "'";
  }

  @Override
  public void restrictRownums(int firstRowIndex, int rowCount, Query query) {
	    /* TODO implement DatabaseDialect.applyRownumRestriction()
			MySQL, PostgreSQL, H2: SELECT * FROM T LIMIT 10 OFFSET 20
	     */
    throw ExceptionFactory.getInstance().programmerUnsupported(
        "MySQLDialect.applyRownumRestriction() is not implemented");
  }

  @Override
  public String getSpecialType(String type) {
    if ("long".equals(type)) {
      return "bigint";
    }
    return super.getSpecialType(type);
  }
}