br.com.objectos.way.pojo.plugin.BuilderClass Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of pojo-plugin Show documentation
There is a newer version: 0.6.0
/*
 * 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.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

import javax.lang.model.element.Modifier;

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

import com.squareup.javapoet.CodeBlock;
import com.squareup.javapoet.FieldSpec;
import com.squareup.javapoet.MethodSpec;
import com.squareup.javapoet.TypeSpec;

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

  private final StandardBuilderConfiguration builder;
  private final TypeSpec.Builder type;

  private BuilderClass(StandardBuilderConfiguration builder, TypeSpec.Builder type) {
    this.builder = builder;
    this.type = type;
  }

  public static BuilderClass of(StandardBuilderConfiguration builder) {
    Naming naming = builder.naming();

    TypeSpec.Builder type = TypeSpec.classBuilder(naming.builderClassSimpleName())
        .addModifiers(Modifier.FINAL)
        .addSuperinterface(naming.builderInterfaceTypeNameUnbounded());
    naming.typeVariableNameListTo(type);

    return new BuilderClass(builder, type);
  }

  public Artifact execute() {
    List constructorList = builder.constructorList();
    List propertyList = builder.propertyList();
    List pluginList = builder.builderPropertyPluginList();

    type.addFields(field(constructorList))
        .addFields(builder.customFieldSpecList())
        .addMethods(constructor(constructorList))
        .addMethod(build(constructorList));

    for (Property property : propertyList) {
      for (BuilderPropertyPlugin plugin : pluginList) {
        if (plugin.test(property)) {
          plugin.execute(property).acceptBuilderClass(type);
          break;
        }
      }
    }

    return builder.artifact(type);
  }

  private MethodSpec build(List constructorList) {
    MethodSpec.Builder b = MethodSpec.methodBuilder("build")
        .addAnnotation(Override.class)
        .addModifiers(Modifier.PUBLIC)
        .returns(builder.naming().superClassTypeNameUnbounded());

    AtomicInteger index = new AtomicInteger();
    List codeBlockList = constructorList.stream()
        .map(constructor -> constructor.build(builder.naming(), index.getAndIncrement()))
        .collect(Collectors.toList());
    for (CodeBlock codeBlock : codeBlockList) {
      b.addCode(codeBlock);
    }

    return b.build();
  }

  private List constructor(List constructorList) {
    AtomicInteger index = new AtomicInteger();
    return constructorList.stream()
        .map(constructor -> constructor.constructor(index.getAndIncrement()))
        .collect(Collectors.toList());
  }

  private List field(List constructorList) {
    AtomicInteger index = new AtomicInteger();
    return constructorList.stream()
        .flatMap(constructor -> constructor.fieldStream(index.getAndIncrement()))
        .collect(Collectors.toList());
  }

}