| /* |
| * Copyright (c) 2004 - 2011 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.emf.cdo.releng.version; |
| |
| import org.eclipse.core.resources.IFile; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| |
| import org.xml.sax.SAXException; |
| |
| import javax.xml.parsers.ParserConfigurationException; |
| import javax.xml.parsers.SAXParser; |
| import javax.xml.parsers.SAXParserFactory; |
| |
| import java.io.FileNotFoundException; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| import java.util.WeakHashMap; |
| |
| /** |
| * @author Eike Stepper |
| */ |
| public class ReleaseManager |
| { |
| public static final ReleaseManager INSTANCE = new ReleaseManager(); |
| |
| private Map<Release, Long> releases = new WeakHashMap<Release, Long>(); |
| |
| private SAXParserFactory parserFactory; |
| |
| private ReleaseManager() |
| { |
| } |
| |
| private SAXParser getParser() throws ParserConfigurationException, SAXException |
| { |
| if (parserFactory == null) |
| { |
| parserFactory = SAXParserFactory.newInstance(); |
| } |
| |
| return parserFactory.newSAXParser(); |
| } |
| |
| public synchronized Release getRelease(IFile file) throws CoreException |
| { |
| try |
| { |
| for (Entry<Release, Long> entry : releases.entrySet()) |
| { |
| Release release = entry.getKey(); |
| if (release.getFile().equals(file)) |
| { |
| long timeStamp = entry.getValue(); |
| if (file.getLocalTimeStamp() == timeStamp) |
| { |
| return release; |
| } |
| |
| releases.remove(release); |
| break; |
| } |
| } |
| |
| if (!file.exists()) |
| { |
| throw new FileNotFoundException(file.getFullPath().toString()); |
| } |
| |
| Release release = new Release(getParser(), file); |
| releases.put(release, file.getLocalTimeStamp()); |
| return release; |
| } |
| catch (CoreException ex) |
| { |
| throw ex; |
| } |
| catch (Exception ex) |
| { |
| throw new CoreException(new Status(IStatus.ERROR, Activator.PLUGIN_ID, ex.getLocalizedMessage(), ex)); |
| } |
| } |
| } |