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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.schema.info;

import java.util.Collections;
import java.util.List;

import br.com.objectos.way.testable.Equality;

/**
 * @author [email protected] (Marcio Endo)
 */
class PrimaryKeyInfoVoid extends PrimaryKeyInfo {

  private static final PrimaryKeyInfo INSTANCE = new PrimaryKeyInfoVoid();

  private PrimaryKeyInfoVoid() {
  }

  public static PrimaryKeyInfo get() {
    return INSTANCE;
  }

  @Override
  public Equality isEqualTo(Object that) {
    return Equality.equal();
  }

  @Override
  String name() {
    return null;
  }

  @Override
  final List keyPartList() {
    return Collections.emptyList();
  }

}