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/*
 * Copyright 2014 Objectos, Fábrica de Software LTDA.
 *
 * Licensed 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
 *
 * http://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 br.com.objectos.way.sql;

import java.sql.SQLException;

import br.com.objectos.way.core.auto.AutoPojo;

import com.google.common.base.Optional;

/**
 * @author [email protected] (Marcio Endo)
 */
@AutoPojo
public abstract class MaybeExe extends SelectExe {

  MaybeExe() {
  }

  static  MaybeExeBuilder builder() {
    return new MaybeExeBuilderPojo();
  }

  @Override
  public Binder> binder() {
    return new Binder>(this, statement());
  }

  @Override
  public Optional execute(ResultFunction resultFunction) throws SqlException {
    return execute(new ThisCommand(resultFunction));
  }

  private class ThisCommand extends Command> {

    public ThisCommand(ResultFunction resultFunction) {
      super(resultFunction);
    }

    @Override
    Optional execute(Result rs) throws SQLException {
      Optional res = Optional.absent();

      if (rs.next()) {
        T result = resultFunction.apply(rs);
        res = Optional.of(result);
      }

      return res;
    }

  }

}