/*
* Copyright 2000-2001,2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jetspeed.capability;
//standard Jetspeed stuff
import org.apache.jetspeed.util.MimeType;
import org.apache.jetspeed.om.registry.ClientEntry;
import org.apache.jetspeed.om.registry.MediaTypeEntry;
import org.apache.jetspeed.om.registry.MediaTypeRegistry;
import org.apache.jetspeed.services.Registry;
//standard Java stuff
import java.util.Vector;
import java.util.Iterator;
import java.util.Enumeration;
/**
* Read only wrapper around a ClientEntry registry entry that
* implements the CapabilityMap interface
*
* @author <a href="mailto:raphael@apache.org">Rapha�l Luta</a>
* @version $Id: BaseCapabilityMap.java,v 1.8 2004/02/23 02:46:39 jford Exp $
*/
public class BaseCapabilityMap implements CapabilityMap
{
private String useragent;
private ClientEntry entry;
protected BaseCapabilityMap(String agent, ClientEntry entry)
{
this.useragent = agent;
this.entry = entry;
}
/**
@see CapabilityMap#getPreferredType
*/
public MimeType getPreferredType()
{
return entry.getMimetypeMap().getPreferredMimetype();
}
/**
Returns the preferred media type for the current user-agent
*/
public String getPreferredMediaType()
{
Iterator i = listMediaTypes();
if (i.hasNext())
{
return (String)i.next();
}
return null;
}
/**
* Returns an ordered list of supported media-types, from most preferred
* to least preferred
*/
public Iterator listMediaTypes()
{
Vector results = new Vector();
Vector types = new Vector();
// first copy the current media type list, ordered by global preference
Enumeration en = ((MediaTypeRegistry)Registry.get(Registry.MEDIA_TYPE)).getEntries();
while (en.hasMoreElements())
{
types.add(en.nextElement());
}
//then retrieve a list of supported mime-types, ordered by
//preference
Iterator mimes = entry.getMimetypeMap().getMimetypes();
//now, for each mime-type test if the media is supported
while(mimes.hasNext())
{
String mime = ((MimeType)mimes.next()).getContentType();
Iterator i = types.iterator();
while(i.hasNext())
{
MediaTypeEntry mte = (MediaTypeEntry)i.next();
if (mime.equals(mte.getMimeType()))
{
if (entry.getCapabilityMap().containsAll(mte.getCapabilityMap()))
{
results.add(mte.getName());
}
}
}
}
return results.iterator();
}
/**
@see CapabilityMap#getAgent
*/
public String getAgent()
{
return this.useragent;
}
/**
@see CapabilityMap#hasCapability
*/
public boolean hasCapability( int cap )
{
return false;
}
/**
@see CapabilityMap#hasCapability
*/
public boolean hasCapability( String capability )
{
Iterator i = entry.getCapabilityMap().getCapabilities();
while (i.hasNext())
{
String cap = (String)i.next();
if (cap.equals(capability))
{
return true;
}
}
return false;
}
/**
@see CapabilityMap#getMimeTypes
*/
public MimeType[] getMimeTypes()
{
Vector v = new Vector();
Iterator i = entry.getMimetypeMap().getMimetypes();
while (i.hasNext())
{
MimeType mime = (MimeType)i.next();
v.add(mime);
}
return (MimeType[])v.toArray();
}
/**
@see CapabilityMap#supportsMimeType
*/
public boolean supportsMimeType( MimeType mimeType )
{
Iterator i = entry.getMimetypeMap().getMimetypes();
while (i.hasNext())
{
MimeType mime = (MimeType)i.next();
if (mime.equals(mimeType))
{
return true;
}
}
return false;
}
/**
@see CapabilityMap#supportsMimeType
*/
public boolean supportsMediaType( String media )
{
if (media == null)
{
return true;
}
MediaTypeEntry mte = (MediaTypeEntry)Registry.getEntry(Registry.MEDIA_TYPE, media);
if (!supportsMimeType(new MimeType(mte.getMimeType())))
{
return false;
}
return entry.getCapabilityMap().containsAll(mte.getCapabilityMap());
}
/**
Create a map string representation
*/
public String toString()
{
StringBuffer desc = new StringBuffer(entry.getName());
Iterator i = entry.getMimetypeMap().getMimetypes();
while (i.hasNext())
{
MimeType mime = (MimeType)i.next();
desc.append( mime ).append("-");
}
i = entry.getCapabilityMap().getCapabilities();
while ( i.hasNext() )
{
String capa = (String)i.next();
desc.append(capa).append("/");
}
return desc.toString();
}
}