001    /*
002      GRANITE DATA SERVICES
003      Copyright (C) 2011 GRANITE DATA SERVICES S.A.S.
004    
005      This file is part of Granite Data Services.
006    
007      Granite Data Services is free software; you can redistribute it and/or modify
008      it under the terms of the GNU Library General Public License as published by
009      the Free Software Foundation; either version 2 of the License, or (at your
010      option) any later version.
011    
012      Granite Data Services is distributed in the hope that it will be useful, but
013      WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
014      FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
015      for more details.
016    
017      You should have received a copy of the GNU Library General Public License
018      along with this library; if not, see <http://www.gnu.org/licenses/>.
019    */
020    
021    package org.granite.builder.properties;
022    
023    import java.io.File;
024    import java.io.IOException;
025    
026    import org.eclipse.core.resources.IProject;
027    import org.eclipse.core.runtime.CoreException;
028    import org.granite.builder.properties.GraniteProperties;
029    import org.granite.builder.util.FileUtil;
030    import org.granite.builder.util.XStreamUtil;
031    
032    /**
033     * @author Franck WOLFF
034     */
035    public class GranitePropertiesLoader {
036    
037        private static final String FILE_NAME = ".granite";
038        private static final String DEFAULT_CHARSET = "UTF-8";
039    
040            public static GraniteProperties load(IProject project) throws IOException {
041                    File file = getPropertiesFile(project);
042            if (file.exists()) {
043                    GraniteProperties properties = XStreamUtil.load(file, GraniteProperties.class, DEFAULT_CHARSET);
044                    ValidationResults results = new ValidationResults();
045                    properties.validate(results);
046                    if (results.hasErrors())
047                            throw new IOException("Illegal '.granite' file in your project. " + results);
048                    properties.setTimestamp(file.lastModified());
049                    return properties;
050            }
051            return GraniteProperties.getDefaultProperties();
052            }
053            
054            public static void save(IProject project, GraniteProperties properties) throws IOException {
055                    File file = getPropertiesFile(project);
056                    XStreamUtil.save(file, properties, DEFAULT_CHARSET);
057            }
058            
059            public static boolean isOutdated(IProject project, GraniteProperties properties) {
060                    File file = getPropertiesFile(project);
061                    return properties == null || (file.exists() && file.lastModified() > properties.getTimestamp());
062            }
063            
064        public static File getPropertiesFile(IProject project) {
065            try {
066                    return FileUtil.getLocationFile(project.getFile(FILE_NAME));
067            }
068            catch (CoreException e) {
069                    throw new RuntimeException("Could not get " + FILE_NAME + " location file", e);
070            }
071        }
072        
073        public static boolean exists(IProject project) {
074            File propertiesFile = getPropertiesFile(project);
075            return propertiesFile != null && propertiesFile.exists();
076        }
077    }