/*
* 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.services.rest.impl.provider;
import org.exoplatform.services.rest.ApplicationContext;
import org.exoplatform.services.rest.impl.ApplicationContextImpl;
import org.exoplatform.services.rest.impl.MultivaluedMapImpl;
import org.exoplatform.services.rest.provider.EntityProvider;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.lang.annotation.Annotation;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.Provider;
/**
* @author <a href="mailto:andrew00x@gmail.com">Andrey Parfonov</a>
* @version $Id: $
*/
@Provider
@Consumes({MediaType.APPLICATION_FORM_URLENCODED})
@Produces({MediaType.APPLICATION_FORM_URLENCODED})
public class MultivaluedMapEntityProvider implements EntityProvider<MultivaluedMap<String, String>>
{
/**
* {@inheritDoc}
*/
public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
{
if (type == MultivaluedMap.class)
{
try
{
ParameterizedType t = (ParameterizedType)genericType;
Type[] ta = t.getActualTypeArguments();
if (ta.length == 2 && ta[0] == String.class && ta[1] == String.class)
return true;
return false;
}
catch (ClassCastException e)
{
return false;
}
}
return false;
}
/**
* {@inheritDoc}
*/
@SuppressWarnings("unchecked")
public MultivaluedMap<String, String> readFrom(Class<MultivaluedMap<String, String>> type, Type genericType,
Annotation[] annotations, MediaType mediaType, MultivaluedMap<String, String> httpHeaders,
InputStream entityStream) throws IOException
{
ApplicationContext context = ApplicationContextImpl.getCurrent();
Object o = context.getAttributes().get("org.exoplatform.ws.rs.entity.form");
if (o != null)
return (MultivaluedMap<String, String>)o;
MultivaluedMap<String, String> form = new MultivaluedMapImpl();
int r = -1;
StringBuffer sb = new StringBuffer();
try
{
while ((r = entityStream.read()) != -1)
{
if (r != '&')
{
sb.append((char)r);
}
else
{
addPair(sb.toString().trim(), form);
sb.setLength(0);
}
}
// keep the last part
addPair(sb.toString(), form);
context.getAttributes().put("org.exoplatform.ws.rs.entity.form", form);
return form;
}
catch (UnsupportedEncodingException e)
{
throw new IllegalArgumentException(e);
}
}
/**
* Parse string and add key/value pair in the {@link MultivaluedMap}.
*
* @param s string for processing
* @param f {@link MultivaluedMap} to add result of parsing
* @throws UnsupportedEncodingException if supplied string can't be decoded
*/
private static void addPair(String s, MultivaluedMap<String, String> f) throws UnsupportedEncodingException
{
if (s.length() == 0)
return;
int eq = s.indexOf('=');
String name;
String value;
if (eq < 0)
{
name = URLDecoder.decode(s, "UTF-8");
value = "";
}
else
{
name = URLDecoder.decode(s.substring(0, eq), "UTF-8");
value = URLDecoder.decode(s.substring(eq + 1), "UTF-8");
}
f.add(name, value);
}
/**
* {@inheritDoc}
*/
public long getSize(MultivaluedMap<String, String> t, Class<?> type, Type genericType, Annotation[] annotations,
MediaType mediaType)
{
return -1;
}
/**
* {@inheritDoc}
*/
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
{
return MultivaluedMap.class.isAssignableFrom(type);
}
/**
* {@inheritDoc}
*/
public void writeTo(MultivaluedMap<String, String> t, Class<?> type, Type genericType, Annotation[] annotations,
MediaType mediaType, MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream) throws IOException
{
int i = 0;
for (Map.Entry<String, List<String>> e : t.entrySet())
{
for (String value : e.getValue())
{
if (i > 0)
entityStream.write('&');
String name = URLEncoder.encode(e.getKey(), "UTF-8");
entityStream.write(name.getBytes());
i++;
if (value != null)
{
entityStream.write('=');
value = URLEncoder.encode(value, "UTF-8");
entityStream.write(value.getBytes());
}
}
}
}
}