/**
* Copyright (C) 2003-2008 eXo Platform SAS.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Affero General Public License
* as published by the Free Software Foundation; either version 3
* of the License, or (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see<http://www.gnu.org/licenses/>.
*/
package org.etk.core.rest.impl.provider;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.Iterator;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.Consumes;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.Provider;
import org.apache.commons.fileupload.DefaultFileItemFactory;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUpload;
import org.apache.commons.fileupload.FileUploadException;
import org.etk.core.rest.RequestHandler;
import org.etk.core.rest.impl.ApplicationContext;
import org.etk.core.rest.impl.ApplicationContextImpl;
import org.etk.core.rest.provider.EntityProvider;
@Provider
@Consumes({ "multipart/*" })
public class MultipartFormDataEntityProvider implements EntityProvider<Iterator<FileItem>> {
/**
* @see HttpServletRequest
*/
@Context
private HttpServletRequest httpRequest;
/**
* {@inheritDoc}
*/
public boolean isReadable(Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType) {
if (type == Iterator.class) {
try {
ParameterizedType t = (ParameterizedType) genericType;
Type[] ta = t.getActualTypeArguments();
if (ta.length == 1 && ta[0] == FileItem.class) {
return true;
}
return false;
} catch (ClassCastException e) {
return false;
}
}
return false;
}
/**
* {@inheritDoc}
*/
@SuppressWarnings("unchecked")
public Iterator<FileItem> readFrom(Class<Iterator<FileItem>> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, String> httpHeaders,
InputStream entityStream) throws IOException {
try {
ApplicationContext context = ApplicationContextImpl.getCurrent();
int bufferSize = (Integer) context.getAttributes().get(RequestHandler.WS_RS_BUFFER_SIZE);
File repo = (File) context.getAttributes().get(RequestHandler.WS_RS_TMP_DIR);
DefaultFileItemFactory factory = new DefaultFileItemFactory(bufferSize, repo);
FileUpload upload = new FileUpload(factory);
return upload.parseRequest(httpRequest).iterator();
} catch (FileUploadException e) {
throw new IOException("Can't process multipart data item " + e);
}
}
/**
* {@inheritDoc}
*/
public long getSize(Iterator<FileItem> t,
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType) {
return -1;
}
/**
* {@inheritDoc}
*/
public boolean isWriteable(Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType) {
// output is not supported
return false;
}
/**
* {@inheritDoc}
*/
public void writeTo(Iterator<FileItem> t,
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, Object> httpHeaders,
OutputStream entityStream) throws IOException {
throw new UnsupportedOperationException();
}
}