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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.code;

import java.lang.reflect.Field;
import java.util.List;
import java.util.Optional;

import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;

/**
 * @author [email protected] (Marcio Endo)
 */
class JdtWorkaroundBinding implements JdtWorkaround {

  private final Object binding;

  public JdtWorkaroundBinding(Object binding) {
    this.binding = binding;
  }

  @Override
  public List getEnclosedElements(TypeElement element) {
    setTagBits(0x4000); // TagBits.AreMethodsSorted;
    return element.getEnclosedElements();
  }

  void setTagBits(long bit) {
    Optional maybeTagBits = Jdt.field(binding, "tagBits");

    if (!maybeTagBits.isPresent()) {
      return;
    }

    try {
      Field tagBits = maybeTagBits.get();
      long tagBitsValue = ((Long) tagBits.get(binding)).longValue();
      tagBitsValue |= bit;
      tagBits.set(binding, tagBitsValue);
    } catch (IllegalArgumentException e) {
      throw new JdtWorkaroundException(e);
    } catch (IllegalAccessException e) {
      throw new JdtWorkaroundException(e);
    }
  }

}