content: /*****************************************************************
   *   Licensed to the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
   *  with the License.  You may obtain a copy of the License at
   *
   *    https://www.apache.org/licenses/LICENSE-2.0
   *
   *  Unless required by applicable law or agreed to in writing,
   *  software distributed under the License is distributed on an
   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   *  KIND, either express or implied.  See the License for the
   *  specific language governing permissions and limitations
   *  under the License.
   ****************************************************************/
  
  package org.apache.cayenne.dba.postgres;
  
  import java.sql.Connection;
  
  import org.apache.cayenne.access.DataNode;
  import org.apache.cayenne.access.translator.procedure.ProcedureTranslator;
  import org.apache.cayenne.dba.sqlserver.SQLServerProcedureAction;
  import org.apache.cayenne.query.ProcedureQuery;
  
  /**
   * Current implementation simply relies on SQLServerProcedureAction superclass behavior.
   * Namely that CallableStatement.execute() rewinds result set pointer so
   * CallableStatement.getMoreResults() shouldn't be invoked until the first result set is
   * processed.
   * 
   * @since 1.2
   */
  class PostgresProcedureAction extends SQLServerProcedureAction {
  
      PostgresProcedureAction(ProcedureQuery query, DataNode dataNode) {
          super(query, dataNode);
      }
  
      /**
       * Creates a translator that adds parenthesis to no-param queries.
       */
      // see CAY-750 for the problem description
      @Override
      protected ProcedureTranslator createTranslator(Connection connection) {
          ProcedureTranslator translator = new PostgresProcedureTranslator();
          translator.setAdapter(dataNode.getAdapter());
          translator.setQuery(query);
          translator.setEntityResolver(dataNode.getEntityResolver());
          translator.setConnection(connection);
          translator.setJdbcEventLogger(dataNode.getJdbcEventLogger());
          return translator;
      }
  
      static class PostgresProcedureTranslator extends ProcedureTranslator {
  
          @Override
          protected String createSqlString() {
  
              String sql = super.createSqlString();
  
              // add empty parameter parenthesis
              if (sql.endsWith("}") && !sql.endsWith(")}")) {
                  sql = sql.substring(0, sql.length() - 1) + "()}";
              }
  
              return sql;
          }
      }
  }
  