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/*
 * Copyright 2015 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.sql;

import br.com.objectos.db.ParameterBinder;
import br.com.objectos.db.SelectBuilder;

/**
 * @author [email protected] (Marcio Endo)
 */
abstract class SelectNode {

  private final SelectNode previous;

  public SelectNode(SelectNode previous) {
    this.previous = previous;
  }

  ParameterBinder bind(ParameterBinder binder) {
    return bind0(previous.bind(binder));
  }

  ParameterBinder bind0(ParameterBinder binder) {
    return binder;
  }

  ResultMapper mapper() {
    return previous.mapper();
  }

  SelectBuilder write(SelectBuilder sql) {
    return write0(previous.write(sql));
  }

  abstract SelectBuilder write0(SelectBuilder sql);

  abstract static class First extends SelectNode {

    public First() {
      super(null);
    }

    @Override
    ParameterBinder bind(ParameterBinder binder) {
      return bind0(binder);
    }

    @Override
    SelectBuilder write(SelectBuilder sql) {
      return write0(sql);
    }

  }

}