| /* |
| * Copyright (c) 2015 Eike Stepper (Berlin, Germany) and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Eike Stepper - initial API and implementation |
| */ |
| package org.eclipse.net4j.util.container; |
| |
| import org.eclipse.net4j.util.container.IContainer.Persistence; |
| import org.eclipse.net4j.util.io.IORuntimeException; |
| import org.eclipse.net4j.util.io.IOUtil; |
| |
| import java.io.BufferedInputStream; |
| import java.io.BufferedOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.io.OutputStream; |
| import java.util.Collection; |
| |
| /** |
| * @author Eike Stepper |
| * @since 3.5 |
| */ |
| public abstract class ContainerPersistence<E> implements Persistence<E> |
| { |
| public Collection<E> loadElements() throws IORuntimeException |
| { |
| InputStream out = null; |
| |
| try |
| { |
| out = openInputStream(); |
| ObjectInputStream oos = new ObjectInputStream(new BufferedInputStream(out)); |
| |
| @SuppressWarnings("unchecked") |
| Collection<E> elements = (Collection<E>)oos.readObject(); |
| return elements; |
| } |
| catch (IOException ex) |
| { |
| throw new IORuntimeException(ex); |
| } |
| catch (ClassNotFoundException ex) |
| { |
| throw new IORuntimeException(ex); |
| } |
| finally |
| { |
| IOUtil.closeSilent(out); |
| } |
| } |
| |
| public void saveElements(Collection<E> elements) throws IORuntimeException |
| { |
| OutputStream out = null; |
| |
| try |
| { |
| out = openOutputStream(); |
| |
| ObjectOutputStream oos = new ObjectOutputStream(new BufferedOutputStream(out)); |
| oos.writeObject(elements); |
| oos.flush(); |
| } |
| catch (IOException ex) |
| { |
| throw new IORuntimeException(ex); |
| } |
| finally |
| { |
| IOUtil.closeSilent(out); |
| } |
| } |
| |
| protected abstract InputStream openInputStream() throws IOException; |
| |
| protected abstract OutputStream openOutputStream() throws IOException; |
| } |