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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.way.sql;

import br.com.objectos.way.core.auto.AutoFunctional;
import br.com.objectos.way.sql.ForeignKeyDef.Level1;

import com.google.common.base.Optional;
import com.google.common.base.Preconditions;

/**
 * @author [email protected] (Marcio Endo)
 */
class ConstraintDefPojo implements ConstraintDef {

  private final TableDefPojo tableDef;
  private final String name;

  private Optional foreignKeyDef = Optional.absent();

  public ConstraintDefPojo(TableDefPojo tableDef, String name) {
    this.tableDef = Preconditions.checkNotNull(tableDef);
    this.name = Preconditions.checkNotNull(name);
  }

  @Override
  public  Level1 foreignKey(ColumnRef columnRef) {
    ForeignKeyDefLevel1 pojo = ForeignKeyDefPojo. level1(tableDef, name, columnRef);
    foreignKeyDef = Optional. of(pojo);
    return pojo;
  }

  @AutoFunctional
  Optional toForeignKeyDef() {
    return foreignKeyDef;
  }

}