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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.Optional;

import br.com.objectos.way.code.TypeParameterInfo;
import br.com.objectos.way.metainf.Services;

/**
 * @author [email protected] (Marcio Endo)
 */
@Services(Plugin.class)
public class OptionalPlugin extends AbstractPlugin implements BuilderPropertyAction {

  @Override
  protected void configure() {
    when(property(instanceOf(Optional.class))).execute(this);
  }

  @Override
  public BuilderProperty execute(Property property) {
    return BuilderProperty.of(
        property.standardBuilderProperty(),
        empty(property),
        of(property),
        ofNullable(property));
  }

  private BuilderProperty empty(Property property) {
    return BuilderProperty.methodBuilder(property)
        .name()
        .assignment("$T.empty()", Optional.class)
        .build();
  }

  private BuilderProperty of(Property property) {
    return BuilderProperty.methodBuilder(property)
        .nameSuffix("Of")
        .addParameter(property.typeParameterInfoStream()
            .map(TypeParameterInfo::typeNameBound)
            .findFirst()
            .get())
        .assignment("$T.of($L)", Optional.class, property.name())
        .build();
  }

  private BuilderProperty ofNullable(Property property) {
    return BuilderProperty.methodBuilder(property)
        .nameSuffix("OfNullable")
        .addParameter(property.typeParameterInfoStream()
            .map(TypeParameterInfo::typeNameBound)
            .findFirst()
            .get())
        .assignment("$T.ofNullable($L)", Optional.class, property.name())
        .build();
  }

}