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/*
 * Copyright 2014-2015 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.pojo.plugin;

import java.util.Objects;

import br.com.objectos.way.code.MethodInfo;

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

  private final MethodAction action;

  MethodPlugin(MethodAction action) {
    this.action = action;
  }

  public static MethodPlugin of(MethodAction action) {
    Objects.requireNonNull(action);
    return new Always(action);
  }

  public static MethodPlugin of(MethodAction action, MethodPredicate condition) {
    Objects.requireNonNull(action);
    Objects.requireNonNull(condition);
    return new Conditional(action, condition);
  }

  public Contribution execute(PojoInfo pojoInfo, MethodInfo method) {
    return action.execute(pojoInfo, method);
  }

  public abstract boolean test(MethodInfo method);

  void accept(GeneratedBy generatedBy) {
    generatedBy.add(action.getClass());
  }

  private static class Always extends MethodPlugin {

    public Always(MethodAction action) {
      super(action);
    }

    @Override
    public boolean test(MethodInfo method) {
      return true;
    }

  }

  private static class Conditional extends MethodPlugin {

    private final MethodPredicate condition;

    public Conditional(MethodAction action, MethodPredicate condition) {
      super(action);
      this.condition = condition;
    }

    @Override
    public boolean test(MethodInfo method) {
      return condition.test(method);
    }

  }

}