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     * FileContentLocation.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.io.IOException;
035    
036    import org.jfree.io.IOUtils;
037    import org.jfree.repository.ContentCreationException;
038    import org.jfree.repository.ContentEntity;
039    import org.jfree.repository.ContentIOException;
040    import org.jfree.repository.ContentItem;
041    import org.jfree.repository.ContentLocation;
042    import org.jfree.repository.Repository;
043    
044    /**
045     * Creation-Date: 13.11.2006, 12:01:11
046     *
047     * @author Thomas Morgner
048     */
049    public class FileContentLocation extends FileContentEntity implements ContentLocation
050    {
051      public FileContentLocation(final ContentLocation parent, final File backend) throws ContentIOException
052      {
053        super(parent, backend);
054        if (backend.exists() == false || backend.isDirectory() == false)
055        {
056          throw new ContentIOException("The given backend-file is not a directory.");
057        }
058      }
059    
060      public FileContentLocation(final Repository repository, final File backend) throws ContentIOException
061      {
062        super(repository, backend);
063        if (backend.exists() == false || backend.isDirectory() == false)
064        {
065          throw new ContentIOException("The given backend-file is not a directory.");
066        }
067      }
068    
069      public ContentEntity[] listContents() throws ContentIOException
070      {
071        final File file = getBackend();
072        final File[] files = file.listFiles();
073        final ContentEntity[] entities = new ContentEntity[files.length];
074        for (int i = 0; i < files.length; i++)
075        {
076          final File child = files[i];
077          if (child.isDirectory())
078          {
079            entities[i] = new FileContentLocation(this, child);
080          }
081          else if (child.isFile())
082          {
083            entities[i] = new FileContentLocation(this, child);
084          }
085        }
086        return entities;
087      }
088    
089      public ContentEntity getEntry(final String name) throws ContentIOException
090      {
091        final File file = getBackend();
092        final File child = new File (file, name);
093        if (child.exists() == false)
094        {
095          throw new ContentIOException("Not found.");
096        }
097        try
098        {
099          if (IOUtils.getInstance().isSubDirectory(file, child))
100          {
101            throw new ContentIOException("Not sub-directory");
102          }
103        }
104        catch (IOException e)
105        {
106          throw new ContentIOException("IO Error.", e);
107        }
108    
109        if (child.isDirectory())
110        {
111          return new FileContentLocation(this, child);
112        }
113        else if (child.isFile())
114        {
115          return new FileContentItem(this, child);
116        }
117        else
118        {
119          throw new ContentIOException("Not File nor directory.");
120        }
121      }
122    
123      public ContentItem createItem(final String name) throws ContentCreationException
124      {
125        final File file = getBackend();
126        final File child = new File (file, name);
127        if (child.exists())
128        {
129          throw new ContentCreationException("File already exists: " + child);
130        }
131        try
132        {
133          if (child.createNewFile() == false)
134          {
135            throw new ContentCreationException("Unable to create");
136          }
137          return new FileContentItem(this, child);
138        }
139        catch (IOException e)
140        {
141          throw new ContentCreationException("IOError while create", e);
142        }
143      }
144    
145      public ContentLocation createLocation(final String name)
146          throws ContentCreationException
147      {
148        final File file = getBackend();
149        final File child = new File (file, name);
150        if (child.exists())
151        {
152          throw new ContentCreationException("File already exists.");
153        }
154        if (child.mkdir() == false)
155        {
156          throw new ContentCreationException("Unable to create");
157        }
158        try
159        {
160          return new FileContentLocation(this, child);
161        }
162        catch (ContentIOException e)
163        {
164          throw new ContentCreationException("Failed to create the content-location", e);
165        }
166      }
167    
168      public boolean exists(final String name)
169      {
170        final File file = getBackend();
171        final File child = new File (file, name);
172        return (child.exists());
173      }
174    }