001    /**
002     * ===========================================================
003     * LibRepository : a free Java content repository access layer
004     * ===========================================================
005     *
006     * Project Info:  http://jfreereport.pentaho.org/librepository/
007     *
008     * (C) Copyright 2006, by Pentaho Corporation and Contributors.
009     *
010     * This library is free software; you can redistribute it and/or modify it under the terms
011     * of the GNU Lesser General Public License as published by the Free Software Foundation;
012     * either version 2.1 of the License, or (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015     * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016     * See the GNU Lesser General Public License for more details.
017     *
018     * You should have received a copy of the GNU Lesser General Public License along with this
019     * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020     * Boston, MA 02111-1307, USA.
021     *
022     * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023     * in the United States and other countries.]
024     *
025     * ------------
026     * FileContentEntity.java
027     * ------------
028     * (C) Copyright 2006, by Pentaho Corporation.
029     */
030    
031    package org.jfree.repository.file;
032    
033    import java.io.File;
034    import java.util.Date;
035    
036    import org.jfree.repository.ContentEntity;
037    import org.jfree.repository.ContentLocation;
038    import org.jfree.repository.LibRepositoryBoot;
039    import org.jfree.repository.Repository;
040    
041    /**
042     * Creation-Date: 13.11.2006, 12:01:47
043     *
044     * @author Thomas Morgner
045     */
046    public abstract class FileContentEntity implements ContentEntity
047    {
048      private File backend;
049      private ContentLocation parent;
050      private Repository repository;
051    
052      protected FileContentEntity(final ContentLocation parent, final File backend)
053      {
054        if (backend == null)
055        {
056          throw new NullPointerException("Backend file must be given.");
057        }
058        if (parent == null)
059        {
060          throw new NullPointerException("Parent file must be given.");
061        }
062        this.repository = parent.getRepository();
063        this.parent = parent;
064        this.backend = backend;
065      }
066    
067      protected FileContentEntity(final Repository repository, final File backend)
068      {
069        if (backend == null)
070        {
071          throw new NullPointerException("Backend file must be given.");
072        }
073        if (repository == null)
074        {
075          throw new NullPointerException("Repository file must be given.");
076        }
077        this.repository = repository;
078        this.backend = backend;
079      }
080    
081      public Repository getRepository()
082      {
083        return repository;
084      }
085    
086      public String getName()
087      {
088        return backend.getName();
089      }
090    
091      protected File getBackend()
092      {
093        return backend;
094      }
095    
096      public Object getContentId()
097      {
098        return getName();
099      }
100    
101      public Object getAttribute(final String domain, final String key)
102      {
103        if (LibRepositoryBoot.REPOSITORY_DOMAIN.equals(domain))
104        {
105          if (LibRepositoryBoot.SIZE_ATTRIBUTE.equals(key))
106          {
107            return new Long(backend.length());
108          }
109          else if (LibRepositoryBoot.VERSION_ATTRIBUTE.equals(key))
110          {
111            return new Date(backend.lastModified());
112          }
113        }
114        return null;
115      }
116    
117      public boolean setAttribute(final String domain, final String key, final Object value)
118      {
119        if (LibRepositoryBoot.REPOSITORY_DOMAIN.equals(domain))
120        {
121          if (LibRepositoryBoot.VERSION_ATTRIBUTE.equals(key))
122          {
123            if (value instanceof Date)
124            {
125              final Date date = (Date) value;
126              return backend.setLastModified(date.getTime());
127            }
128            else if (value instanceof Number)
129            {
130              final Number time = (Number) value;
131              return backend.setLastModified(time.longValue());
132            }
133          }
134        }
135        return false;
136      }
137    
138      public ContentLocation getParent()
139      {
140        return parent;
141      }
142    
143      public boolean delete()
144      {
145        return backend.delete();
146      }
147    }