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

import com.google.common.base.Optional;

/**
 * @author [email protected] (Marcio Endo)
 */
@AutoPojo
public abstract class JoinInfo implements CanBeJoined, TableReference, Testable {

  abstract CanBeJoined left();
  abstract JoinKind kind();
  abstract CanBeJoined right();
  abstract Optional condition();

  JoinInfo() {
  }

  public static JoinInfoBuilder builder() {
    return new JoinInfoBuilderPojo();
  }

  @Override
  public SqlBuilder decorate(SqlBuilder sql) {
    return sql
        .append(left())
        .space()
        .append(kind())
        .space()
        .append(right())
        .when(condition().isPresent())
        /**/.space()
        /**/.append("on")
        /**/.space()
        /**/.append(condition().orNull())
        .endWhen();
  }

  public JoinInfo on(Condition condition) {
    return JoinInfo.builder()
        .left(left())
        .kind(kind())
        .right(right())
        .condition(Optional.of(condition))
        .build();
  }

}