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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 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.ArrayBuilder;
import com.rapiddweller.jdbacl.DBUtil;
import com.rapiddweller.jdbacl.DatabaseDialect;
import com.rapiddweller.jdbacl.model.DBSequence;

import java.math.BigInteger;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.List;

/**
 * {@link DatabaseDialect} for Derby 10.6+ which supports sequences.


 * Created: 24.10.2011 10:09:04
 *
 * @author Volker Bergmann
 * @since 0.6.13
 */
public class Derby10_6Dialect extends DerbyDialect {

  /**
   * Instantiates a new Derby 10 6 dialect.
   */
  public Derby10_6Dialect() {
    super(true);
  }

  @Override
  public String renderCreateSequence(DBSequence sequence) {
    /*
			CREATE SEQUENCE [ schemaName. ] SQL92Identifier
			AS dataType 
			| START WITH signedInteger 
			| INCREMENT BY signedInteger 
			| MAXVALUE signedInteger | NO MAXVALUE 
			| MINVALUE signedInteger | NO MINVALUE 
			| CYCLE | NO CYCLE 
    */
    return super.renderCreateSequence(sequence);
  }

  @Override
  protected String renderSequenceNameAndType(DBSequence sequence) {
    String schemaName = sequence.getSchemaName();
    return (schemaName != null ? schemaName + '.' : "") + sequence.getName() + " AS BIGINT";
  }

  @Override
  protected String sequenceNoCycle() {
    return "NO CYCLE";
  }

  @Override
  public String renderDropSequence(String sequenceName) {
    return "DROP SEQUENCE " + sequenceName + " RESTRICT";
  }

  @Override
  public DBSequence[] querySequences(Connection connection) throws SQLException {
    List rows = DBUtil.query("SELECT SEQUENCENAME, STARTVALUE, INCREMENT, MAXIMUMVALUE, MINIMUMVALUE, " +
        "CYCLEOPTION, CURRENTVALUE FROM SYS.SYSSEQUENCES", connection);
    ArrayBuilder builder = new ArrayBuilder<>(DBSequence.class, rows.size());
    for (Object[] row : rows) {
      DBSequence sequence = new DBSequence(row[0].toString(), null);
      sequence.setStart(new BigInteger(row[1].toString()));
      sequence.setIncrement(new BigInteger(row[2].toString()));
      sequence.setMaxValue(new BigInteger(row[3].toString()));
      sequence.setMinValue(new BigInteger(row[4].toString()));
      sequence.setCycle("Y".equals(row[5].toString()));
      sequence.setLastNumber(new BigInteger(row[6].toString()));
      builder.add(sequence);
    }
    return builder.toArray();
  }

  @Override
  public String renderFetchSequenceValue(String sequenceName) {
    // see http://db.apache.org/derby/docs/10.7/ref/rrefsqljnextvaluefor.html
    // see http://stackoverflow.com/questions/5729063/how-to-use-sequence-in-apache-derby
    return "VALUES (NEXT VALUE FOR " + sequenceName + ")";
  }

  @Override
  public void setNextSequenceValue(String sequenceName, long nextValue, Connection connection) throws SQLException {
    DBSequence sequence = getSequence(sequenceName, connection);
    BigInteger lastNumber = sequence.getLastNumber();
    long defaultNext = lastNumber.add(BigInteger.ONE).longValue();
    if (nextValue != defaultNext) {
      DBUtil.executeUpdate(renderDropSequence(sequenceName), connection);
      sequence.setStart(BigInteger.valueOf(nextValue));
      DBUtil.executeUpdate(renderCreateSequence(sequence), connection);
    }
  }

}