/**
* Copyright (C) 2009 eXo Platform SAS.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.resolver;
import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.URL;
import java.util.List;
/**
* Created by The eXo Platform SAS
* Mar 15, 2006
*/
abstract public class ResourceResolver
{
abstract public URL getResource(String url) throws Exception;
abstract public InputStream getInputStream(String url) throws Exception;
abstract public List<URL> getResources(String url) throws Exception;
abstract public List<InputStream> getInputStreams(String url) throws Exception;
@SuppressWarnings("unused")
public String getWebAccessPath(String url)
{
throw new RuntimeException("This method is not supported");
}
abstract public String getResourceScheme();
@SuppressWarnings("unused")
public String getRealPath(String url)
{
throw new RuntimeException("unsupported method");
}
public ResourceKey createResourceKey(String url)
{
return new ResourceKey(hashCode(), url);
}
public String createResourceId(String url)
{
return hashCode() + ":" + url;
}
public boolean isResolvable(String url)
{
return url.startsWith(getResourceScheme());
}
public byte[] getResourceContentAsBytes(String url) throws Exception
{
InputStream is = getInputStream(url);
BufferedInputStream buffer = new BufferedInputStream(is);
ByteArrayOutputStream output = new ByteArrayOutputStream();
byte[] data = new byte[buffer.available()];
int available = -1;
while ((available = buffer.read(data)) > -1)
{
output.write(data, 0, available);
}
return output.toByteArray();
}
abstract public boolean isModified(String url, long lastAccess);
protected String removeScheme(String url)
{
String scheme = getResourceScheme();
if (url.startsWith(scheme))
{
return url.substring(scheme.length());
}
return url;
}
}