/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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.
*
* Copyright (c) 2001 - 2009 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.modules.output.table.html;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import org.pentaho.reporting.libraries.base.util.IOUtils;
import org.pentaho.reporting.libraries.repository.ContentEntity;
import org.pentaho.reporting.libraries.repository.ContentLocation;
import org.pentaho.reporting.libraries.repository.Repository;
import org.pentaho.reporting.libraries.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();
int size = 0;
while (location != null)
{
final ContentLocation parent = location.getParent();
if (parent != null)
{
final String locationName = location.getName();
size += locationName.length();
size += 1;
entityNames.add(locationName);
}
location = location.getParent();
}
final StringBuffer b = new StringBuffer(size);
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();
}
}