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  package org.apache.cayenne.dbsync.merge.token.db;
  
  import org.apache.cayenne.dba.DbAdapter;
  import org.apache.cayenne.dba.QuotingStrategy;
  import org.apache.cayenne.dbsync.merge.factory.MergerTokenFactory;
  import org.apache.cayenne.dbsync.merge.token.MergerToken;
  import org.apache.cayenne.map.DbAttribute;
  import org.apache.cayenne.map.DbEntity;
  
  import java.util.Collections;
  import java.util.List;
  
  /**
   * A {@link MergerToken} to add a "not null" clause to a column.
   */
  public class SetNotNullToDb extends AbstractToDbToken.EntityAndColumn {
  
      public SetNotNullToDb(DbEntity entity, DbAttribute column) {
          super("Set Not Null", 90, entity, column);
      }
  
      @Override
      public List<String> createSql(DbAdapter adapter) {
          QuotingStrategy context = adapter.getQuotingStrategy();
  
          return Collections.singletonList("ALTER TABLE " + context.quotedFullyQualifiedName(getEntity())
                  + " ALTER COLUMN " + context.quotedName(getColumn()) + " SET NOT NULL");
      }
  
      @Override
      public MergerToken createReverse(MergerTokenFactory factory) {
          return factory.createSetAllowNullToModel(getEntity(), getColumn());
      }
  
  }
  