/*
* 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) 2009 Pentaho Corporation. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.webapp.servlet;
import java.util.ArrayList;
import java.text.MessageFormat;
import java.net.URLEncoder;
import java.io.UnsupportedEncodingException;
import org.pentaho.reporting.engine.classic.core.modules.output.table.html.URLRewriteException;
import org.pentaho.reporting.engine.classic.core.modules.output.table.html.URLRewriter;
import org.pentaho.reporting.libraries.repository.ContentEntity;
import org.pentaho.reporting.libraries.repository.ContentIOException;
import org.pentaho.reporting.libraries.repository.ContentLocation;
/**
* Rewrites the URLs generated by the report engine's HTML output to match the content-repository servlet.
*
* @author Thomas Morgner
*/
public class WebAppURLRewriter implements URLRewriter
{
private String pattern;
private String encoding;
public WebAppURLRewriter(final String pattern,
final String encoding)
{
this.pattern = pattern;
this.encoding = encoding;
}
public String rewrite(final ContentEntity contentEntry,
final ContentEntity dataEntity) throws URLRewriteException
{
try
{
final ArrayList entityNames = new ArrayList();
entityNames.add(dataEntity.getName());
ContentLocation location = dataEntity.getParent();
while (location != null)
{
entityNames.add(location.getName());
location = location.getParent();
}
final ArrayList contentNames = new ArrayList();
location = dataEntity.getRepository().getRoot();
while (location != null)
{
contentNames.add(location.getName());
location = location.getParent();
}
// now remove all path elements that are equal ..
while (contentNames.isEmpty() == false && entityNames.isEmpty() == false)
{
final String lastEntity = (String) entityNames.get(entityNames.size() - 1);
final String lastContent = (String) contentNames.get(contentNames.size() - 1);
if (lastContent.equals(lastEntity) == false)
{
break;
}
entityNames.remove(entityNames.size() - 1);
contentNames.remove(contentNames.size() - 1);
}
final StringBuffer b = new StringBuffer(100);
for (int i = entityNames.size() - 1; i >= 0; i--)
{
final String name = (String) entityNames.get(i);
b.append(name);
if (i != 0)
{
b.append('/');
}
}
final String filename = URLEncoder.encode(b.toString(), encoding);
if (pattern == null)
{
return filename;
}
return MessageFormat.format(pattern, new String[]{filename});
}
catch (ContentIOException cioe)
{
throw new URLRewriteException("Failed to compute path", cioe);
}
catch (UnsupportedEncodingException e)
{
throw new URLRewriteException("Failed to encode path", e);
}
}
}