| /******************************************************************************* |
| * Copyright (c) 2009, 2017 Cloudsmith Inc. and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Cloudsmith Inc. - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.equinox.internal.p2.touchpoint.natives; |
| |
| import java.io.File; |
| import java.io.IOException; |
| |
| /** |
| * LazyBackupStore is a BackupStore that only instantiates a real backup store |
| * when needed. |
| */ |
| public class LazyBackupStore implements IBackupStore { |
| private SimpleBackupStore delegate; |
| private final String prefix; |
| |
| /** |
| * Creates a new lazy backup store |
| * @param prefix The prefix to use in constructing the backup store directory |
| */ |
| public LazyBackupStore(String prefix) { |
| this.prefix = prefix; |
| } |
| |
| @Override |
| public boolean backup(File file) throws IOException { |
| loadDelegate(); |
| return delegate.backup(file); |
| } |
| |
| @Override |
| public boolean backupDirectory(File file) throws IOException { |
| loadDelegate(); |
| return delegate.backupDirectory(file); |
| } |
| |
| @Override |
| public void discard() { |
| if (delegate == null) |
| return; |
| delegate.discard(); |
| } |
| |
| @Override |
| public void restore() throws IOException { |
| if (delegate == null) |
| return; |
| delegate.restore(); |
| } |
| |
| private void loadDelegate() { |
| if (delegate != null) |
| return; |
| delegate = new SimpleBackupStore(null, prefix); |
| } |
| |
| @Override |
| public String getBackupName() { |
| loadDelegate(); |
| return delegate.getBackupName(); |
| } |
| |
| @Override |
| public boolean backupCopy(File file) throws IOException { |
| loadDelegate(); |
| return delegate.backupCopy(file); |
| } |
| |
| @Override |
| public void backupCopyAll(File file) throws IOException { |
| loadDelegate(); |
| delegate.backupCopyAll(file); |
| } |
| |
| @Override |
| public void backupAll(File file) throws IOException { |
| loadDelegate(); |
| delegate.backupAll(file); |
| } |
| } |