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  package org.apache.cayenne.unit;
  
  import org.apache.cayenne.access.DataContextProcedureQueryIT;
  import org.apache.cayenne.dba.DbAdapter;
  import org.apache.cayenne.dba.oracle.OracleAdapter;
  import org.apache.cayenne.map.DataMap;
  import org.apache.cayenne.map.DbAttribute;
  import org.apache.cayenne.map.DbEntity;
  import org.apache.cayenne.map.Procedure;
  import org.apache.cayenne.map.ProcedureParameter;
  
  import java.sql.Connection;
  import java.sql.Types;
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Iterator;
  import java.util.List;
  
  /**
   */
  public class OracleUnitDbAdapter extends UnitDbAdapter {
  
      /**
       * Constructor for OracleDelegate.
       * 
       * @param adapter
       */
      public OracleUnitDbAdapter(DbAdapter adapter) {
          super(adapter);
      }
  
      @Override
      public boolean supportsStoredProcedures() {
          return true;
      }
  
      @Override
      public boolean supportsBoolean() {
          return false;
      }
  
      @Override
      public void willDropTables(Connection conn, DataMap map, Collection tablesToDrop) throws Exception {
          // avoid dropping constraints...
      }
  
      /**
       * Oracle 8i does not support more then 1 "LONG xx" column per table
       * PAINTING_INFO need to be fixed.
       */
      @Override
      public void willCreateTables(Connection con, DataMap map) {
          DbEntity paintingInfo = map.getDbEntity("PAINTING_INFO");
  
          if (paintingInfo != null) {
              DbAttribute textReview = paintingInfo.getAttribute("TEXT_REVIEW");
              textReview.setType(Types.VARCHAR);
              textReview.setMaxLength(255);
          }
      }
  
      @Override
      public void createdTables(Connection con, DataMap map) throws Exception {
          if (map.getProcedureMap().containsKey("cayenne_tst_select_proc")) {
              executeDDL(con, "oracle", "create-types-pkg.sql");
              executeDDL(con, "oracle", "create-select-sp.sql");
              executeDDL(con, "oracle", "create-update-sp.sql");
              executeDDL(con, "oracle", "create-update-sp2.sql");
              executeDDL(con, "oracle", "create-out-sp.sql");
          }
      }
  
      @Override
      public boolean supportsLobs() {
          return true;
      }
  
      @Override
      public boolean supportsLobComparisons() {
          // we can actually allow LOB comparisons with some Oracle trickery.
          // E.g.:
          // DBMS_LOB.SUBSTR(CLOB_COLUMN, LENGTH('string') + 1, 1) = 'string'
          return false;
      }
  
      @Override
      public void tweakProcedure(Procedure proc) {
          if (DataContextProcedureQueryIT.SELECT_STORED_PROCEDURE.equals(proc.getName())
                  && proc.getCallParameters().size() == 2) {
              List params = new ArrayList(proc.getCallParameters());
  
              proc.clearCallParameters();
              proc.addCallParameter(new ProcedureParameter("result", OracleAdapter.getOracleCursorType(),
                      ProcedureParameter.OUT_PARAMETER));
              Iterator it = params.iterator();
              while (it.hasNext()) {
                  ProcedureParameter param = (ProcedureParameter) it.next();
                  proc.addCallParameter(param);
              }
  
              proc.setReturningValue(true);
          }
      }
  
      @Override
      public boolean onlyGenericDateType() {
          return true;
      }
  
      @Override
      public boolean onlyGenericNumberType() {
          return true;
      }
  
      @Override
      public boolean supportsTimeSqlType() {
          return false;
      }
  
      @Override
      public boolean supportsExpressionInHaving() {
          return false;
      }
  
      @Override
      public boolean supportsSelectBooleanExpression() {
          return false;
      }
  
      @Override
      public boolean supportsSerializableTransactionIsolation() {
          return true;
      }
  
      @Override
      public boolean supportsPreciseTime() {
          return false;
      }
  }
  