br.com.objectos.way.sql.SingleExe Maven / Gradle / Ivy

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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;

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

  SingleExe() {
  }

  static  SingleExeBuilder builder() {
    return new SingleExeBuilderPojo();
  }

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

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

  private class ThisCommand extends Command {

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

    @Override
    T execute(Result rs) throws SQLException {
      if (!rs.next()) {
        throw new SQLException("SingleExe query must return a result. Otherwise you must use MaybeExe");
      }

      return resultFunction.apply(rs);
    }

  }

}