java.lang.ClassCastException: java.math.cannot be cast to java.lang.Long while starting server

Hibernate ORM
4

Create a class like this

package ....;

import org.hibernate.dialect.SQLServer2012Dialect;
import org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorNoOpImpl;
import org.hibernate.tool.schema.extract.spi.SequenceInformationExtractor;

/**
 * Custom SQLServer dialect to deal with SEQUENCE schema query result processing issue
 */
public class SQLServerCustomDialect extends SQLServer2012Dialect {

  @Override
  public SequenceInformationExtractor getSequenceInformationExtractor() {
    if ( getQuerySequencesString() == null ) {
      return SequenceInformationExtractorNoOpImpl.INSTANCE;
    }
    else {
      return SequenceInformationExtractorImpl.INSTANCE;
    }
  }

}

Set this class as the hibernate dialect in your persistence.xml or whereever you configure hibernate.

Create this class

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 *
 * Adapted from the class with the same name in the Hibernate distribution.
 */

package ...;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;

import org.hibernate.boot.model.relational.QualifiedSequenceName;
import org.hibernate.engine.jdbc.env.spi.IdentifierHelper;
import org.hibernate.tool.schema.extract.internal.SequenceInformationExtractorNoOpImpl;
import org.hibernate.tool.schema.extract.internal.SequenceInformationImpl;
import org.hibernate.tool.schema.extract.spi.ExtractionContext;
import org.hibernate.tool.schema.extract.spi.SequenceInformation;
import org.hibernate.tool.schema.extract.spi.SequenceInformationExtractor;

/**
 * @author Steve Ebersole
 */
public class SequenceInformationExtractorImpl implements SequenceInformationExtractor {
  /**
   * Singleton access
   */
  public static final SequenceInformationExtractorImpl INSTANCE = new SequenceInformationExtractorImpl();

  @Override
  public Iterable<SequenceInformation> extractMetadata(final ExtractionContext extractionContext) throws SQLException {
    final String lookupSql = extractionContext.getJdbcEnvironment().getDialect().getQuerySequencesString();

    // *should* never happen, but to be safe in the interest of performance...
    if ( lookupSql == null ) {
      return SequenceInformationExtractorNoOpImpl.INSTANCE.extractMetadata( extractionContext );
    }

    final IdentifierHelper identifierHelper = extractionContext.getJdbcEnvironment().getIdentifierHelper();
    final Statement statement = extractionContext.getJdbcConnection().createStatement();
    try {
      final ResultSet resultSet = statement.executeQuery( lookupSql );
      try {
        final List<SequenceInformation> sequenceInformationList = new ArrayList<>();
        while ( resultSet.next() ) {
          sequenceInformationList.add(
              new SequenceInformationImpl(
                  new QualifiedSequenceName(
                      identifierHelper.toIdentifier(
                        resultSetCatalogName( resultSet )
                      ),
                      identifierHelper.toIdentifier(
                          resultSetSchemaName( resultSet )
                      ),
                      identifierHelper.toIdentifier(
                          resultSetSequenceName( resultSet )
                      )
                  ),
                  resultSetStartValueSize( resultSet ),
                  resultSetMinValue( resultSet ),
                  resultSetMaxValue( resultSet ),
                  resultSetIncrementValue( resultSet )
              )
          );
        }
        return sequenceInformationList;
      }
      finally {
        try {
          resultSet.close();
        }
        catch (final SQLException ignore) {
        }
      }
    }
    finally {
      try {
        statement.close();
      }
      catch (final SQLException ignore) {
      }
    }
  }

  protected String sequenceNameColumn() {
    return "sequence_name";
  }

  protected String sequenceCatalogColumn() {
    return "sequence_catalog";
  }

  protected String sequenceSchemaColumn() {
    return "sequence_schema";
  }

  protected String sequenceStartValueColumn() {
    return "start_value";
  }

  protected String sequenceMinValueColumn() {
    return "minimum_value";
  }

  protected String sequenceMaxValueColumn() {
    return "maximum_value";
  }

  protected String sequenceIncrementColumn() {
    return "increment";
  }

  protected String resultSetSequenceName(final ResultSet resultSet) throws SQLException {
    return resultSet.getString( sequenceNameColumn() );
  }

  protected String resultSetCatalogName(final ResultSet resultSet) throws SQLException {
    final String column = sequenceCatalogColumn();
    return column != null ? resultSet.getString( column ) : null;
  }

  protected String resultSetSchemaName(final ResultSet resultSet) throws SQLException {
    final String column = sequenceSchemaColumn();
    return column != null ? resultSet.getString( column ) : null;
  }

  protected Long resultSetStartValueSize(final ResultSet resultSet) throws SQLException {
    final String column = sequenceStartValueColumn();
    return column != null ? resultSetGetAsLong( resultSet, column ) : null;
  }

  protected Long resultSetMinValue(final ResultSet resultSet) throws SQLException {
    final String column = sequenceMinValueColumn();
    return column != null ? resultSetGetAsLong( resultSet, column ) : null;
  }

  protected Long resultSetMaxValue(final ResultSet resultSet) throws SQLException {
    final String column = sequenceMaxValueColumn();
    return column != null ? resultSetGetAsLong( resultSet, column ) : null;
  }

  protected Long resultSetIncrementValue(final ResultSet resultSet) throws SQLException {
    final String column = sequenceIncrementColumn();
    return column != null ? resultSetGetAsLong( resultSet, column ) : null;
  }

  private Long resultSetGetAsLong(final ResultSet resultSet, final String column) throws SQLException {
    final Object value = resultSet.getObject(column);
    if (value == null || !(value instanceof Number)) {
      return null;
    }
    return ((Number)value).longValue();
  }
}
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