br.com.objectos.code.ProcessingEnvironmentWrapperJdt Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of apt Show documentation
There is a newer version: 0.15.0
/*
 * 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.code;

import java.util.EnumSet;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Stream;

import javax.annotation.processing.ProcessingEnvironment;
import javax.lang.model.element.Element;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.Name;
import javax.lang.model.element.TypeElement;
import javax.lang.model.element.VariableElement;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.util.Types;
import javax.tools.JavaFileManager.Location;

/**
 * @author [email protected] (Marcio Endo)
 */
public class ProcessingEnvironmentWrapperJdt extends ProcessingEnvironmentWrapper {

  private static final Set ENUM_CONSTANT_MODIFIER_SET = EnumSet.of(
      Modifier.PUBLIC,
      Modifier.STATIC,
      Modifier.FINAL);

  private final Class binaryTypeBinding;
  private final Class sourceTypeBinding;

  public ProcessingEnvironmentWrapperJdt(ProcessingEnvironment environment) {
    super(environment);

    try {
      binaryTypeBinding = Class.forName("org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding");
      sourceTypeBinding = Class.forName("org.eclipse.jdt.internal.compiler.lookup.SourceTypeBinding");
    } catch (ClassNotFoundException e) {
      throw new JdtWorkaroundException(e);
    }
  }

  @Override
  public String filePath(Location location, TypeElement element) {
    StringBuilder optionName = new StringBuilder();
    String[] parts = location.getName().toLowerCase().split("_");
    optionName.append(parts[0]);
    if (parts.length > 1) {
      for (int i = 1; i < parts.length; i++) {
        String part = parts[i];
        optionName.append(Code.upperCaseFirstChar(part));
      }
    }

    String sourcePath = unwrap().getOptions().get(optionName.toString());
    String qualifiedName = element.asType().toString();
    String fileName = qualifiedName.replace(".", FILE_SEPARATOR);
    return sourcePath + FILE_SEPARATOR + fileName + ".java";
  }

  @Override
  public List getEnclosedElements(TypeElement element) {
    JdtWorkaround workaround = workaroundOf(element);
    return workaround.getEnclosedElements(element);
  }

  @Override
  public Stream streamEnclosedEnumConstantElements(Element enumElement) {
    // just a workaround... will not work 100% of times...
    TypeMirror enumType = enumElement.asType();
    Types types = unwrap().getTypeUtils();
    return super.streamEnclosedEnumConstantElements(enumElement)
        .filter(el -> el.getModifiers().equals(ENUM_CONSTANT_MODIFIER_SET))
        .filter(el -> types.isSameType(el.asType(), enumType));
  }

  @Override
  void addSimpleName(List nameList, Element element) {
    Name simpleName = element.getSimpleName();
    String nameString = simpleName.toString();
    String[] parts = nameString.split(Character.toString('$'));
    for (String part : parts) {
      nameList.add(part);
    }
  }

  private JdtWorkaround workaroundOf(TypeElement element) {
    Optional