/**
* ===========================================
* LibLayout : a free Java layouting library
* ===========================================
*
* Project Info: http://reporting.pentaho.org/liblayout/
*
* (C) Copyright 2006-2007, by Pentaho Corporation and Contributors.
*
* This library is free software; you can redistribute it and/or modify it under the terms
* of the GNU Lesser General Public License as published by the Free Software Foundation;
* either version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* ------------
* $Id: FileSystemURLRewriter.java 3524 2007-10-16 11:26:31Z tmorgner $
* ------------
* (C) Copyright 2006-2007, by Pentaho Corporation.
*/
package org.jfree.layouting.modules.output.html;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import org.jfree.io.IOUtils;
import org.jfree.repository.ContentEntity;
import org.jfree.repository.ContentLocation;
import org.jfree.repository.Repository;
import org.jfree.repository.UrlRepository;
/**
* This URL rewriter assumes that the content repository is an URL based
* repository and that each content entity can be resolved to an URL.
*
* @author Thomas Morgner
*/
public class FileSystemURLRewriter implements URLRewriter
{
public FileSystemURLRewriter()
{
}
public String rewrite(final ContentEntity sourceDocument, final ContentEntity dataEntity)
throws URLRewriteException
{
final Repository dataRepository = dataEntity.getRepository();
if (dataRepository instanceof UrlRepository == false)
{
// cannot proceed ..
throw new URLRewriteException("DataRepository is no URL-Repository.");
}
final UrlRepository dataUrlRepo = (UrlRepository) dataRepository;
final String dataPath = buildPath(dataEntity);
final URL dataItemUrl;
try
{
dataItemUrl = new URL(dataUrlRepo.getURL(), dataPath);
}
catch (MalformedURLException e)
{
// cannot proceed ..
throw new URLRewriteException("DataEntity has no valid URL.");
}
final Repository documentRepository = sourceDocument.getRepository();
if (documentRepository instanceof UrlRepository == false)
{
// If at least the data entity has an URL, we can always fall back
// to an global URL..
return dataItemUrl.toExternalForm();
}
try
{
final UrlRepository documentUrlRepo = (UrlRepository) documentRepository;
final String documentPath = buildPath(sourceDocument);
final URL documentUrl = new URL(documentUrlRepo.getURL(), documentPath);
return IOUtils.getInstance().createRelativeURL(dataItemUrl, documentUrl);
}
catch (MalformedURLException e)
{
// If at least the data entity has an URL, we can always fall back
// to an global URL..
return dataItemUrl.toExternalForm();
}
}
private String buildPath(final ContentEntity entity)
{
final ArrayList entityNames = new ArrayList();
entityNames.add(entity.getName());
ContentLocation location = entity.getParent();
while (location != null)
{
entityNames.add(location.getName());
location = location.getParent();
}
final StringBuffer b = new StringBuffer();
for (int i = entityNames.size() - 1; i >= 0; i--)
{
final String name = (String) entityNames.get(i);
b.append(name);
if (i != 0)
{
b.append('/');
}
}
return b.toString();
}
}