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A set of utilities for classes of the java.lang and the java.util packages.

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/*
 * Copyright (C) 2011-2021 Objectos Software LTDA.
 *
 * This file is part of the ObjectosComuns project.
 *
 * ObjectosComuns is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * ObjectosComuns is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with ObjectosComuns.  If not, see .
 */
package br.com.objectos.lang;

import br.com.objectos.multirelease.Singleton;
import java.io.Closeable;
import java.io.IOException;
import java.util.zip.ZipFile;

final class CloserJava7 extends Closer {

  @Singleton.Field
  static final Closer INSTANCE = new CloserJava7();

  private CloserJava7() {}

  @Override
  public final IOException close(IOException rethrow, Closeable closeable) {
    return closeImpl(rethrow, closeable);
  }

  @Override
  public final IOException close(IOException rethrow, ZipFile file) {
    return closeImpl(rethrow, file);
  }

  @SuppressWarnings("unchecked")
  private  E closeImpl(E rethrow, AutoCloseable closeable) {
    E result;
    result = rethrow;

    if (closeable != null) {
      try {
        closeable.close();
      } catch (Exception e) {
        if (result != null) {
          result.addSuppressed(e);
        } else {
          result = (E) e;
        }
      }
    }

    return result;
  }

}