| /******************************************************************************* |
| * Copyright (c) 2010 Boeing. |
| * 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: |
| * Boeing - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.osee.framework.ui.workspacebundleloader; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URL; |
| import java.security.NoSuchAlgorithmException; |
| import java.util.Arrays; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.logging.Level; |
| import org.eclipse.osee.framework.jdk.core.util.ChecksumUtil; |
| import org.eclipse.osee.framework.logging.OseeLog; |
| |
| /** |
| * @author Andrew M. Finkbeiner |
| */ |
| public class FileChangeDetector { |
| |
| private final ConcurrentHashMap<URL, byte[]> bundleNameToMd5Map; |
| |
| public FileChangeDetector() { |
| bundleNameToMd5Map = new ConcurrentHashMap<>(); |
| } |
| |
| public boolean isChanged(URL url) { |
| byte[] digest = getMd5Checksum(url); |
| if (bundleNameToMd5Map.containsKey(url)) { |
| // check for bundle binary equality |
| if (!Arrays.equals(bundleNameToMd5Map.get(url), digest)) { |
| bundleNameToMd5Map.put(url, digest); |
| return true; |
| } else { |
| return false; |
| } |
| } else { |
| bundleNameToMd5Map.put(url, digest); |
| return true; |
| } |
| } |
| |
| private byte[] getMd5Checksum(URL url) { |
| InputStream in = null; |
| byte[] digest = new byte[0]; |
| try { |
| in = url.openStream(); |
| digest = ChecksumUtil.createChecksum(url.openStream(), "MD5"); |
| } catch (IOException ex) { |
| OseeLog.log(FileChangeDetector.class, Level.SEVERE, ex); |
| } catch (NoSuchAlgorithmException ex) { |
| OseeLog.log(FileChangeDetector.class, Level.SEVERE, ex); |
| } finally { |
| if (in != null) { |
| try { |
| in.close(); |
| } catch (IOException ex) { |
| OseeLog.log(FileChangeDetector.class, Level.SEVERE, ex); |
| } |
| } |
| } |
| return digest; |
| } |
| |
| public boolean remove(URL url) { |
| bundleNameToMd5Map.remove(url); |
| return true; |
| } |
| |
| public void clear() { |
| bundleNameToMd5Map.clear(); |
| } |
| |
| } |