/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with this
* work for additional information regarding copyright ownership. The ASF
* licenses this file to you 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.oodt.cas.product.jaxrs.writers;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Provider;
import org.apache.commons.io.IOUtils;
import org.apache.oodt.cas.product.jaxrs.exceptions.BadRequestException;
import org.apache.oodt.cas.product.jaxrs.exceptions.NotFoundException;
import org.apache.oodt.cas.product.jaxrs.resources.ReferenceResource;
import org.apache.tika.Tika;
import org.apache.tika.mime.MimeType;
/**
* A {@link Provider} that writes {@link ReferenceResource reference resources}
* to output streams for HTTP responses with different file content-types.
* @author rlaidlaw
* @version $Revision$
*/
@Provider
@Produces("application/octet-stream")
public class ReferenceFileWriter implements MessageBodyWriter<ReferenceResource>
{
private static final Logger LOGGER = Logger.getLogger(ReferenceFileWriter
.class.getName());
@Override
public long getSize(ReferenceResource resource, Class<?> type,
Type genericType, Annotation[] annotations, MediaType mediaType)
{
return -1;
}
@Override
public boolean isWriteable(Class<?> type, Type genericType,
Annotation[] annotations, MediaType mediaType)
{
return true;
}
@Override
public void writeTo(ReferenceResource resource, Class<?> type,
Type genericType, Annotation[] annotations, MediaType mediaType,
MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream)
throws IOException, WebApplicationException
{
String contentType;
String dataStoreReference = resource.getDataStoreReference();
MimeType mimeType = resource.getMimeType();
if (mimeType != null &&
mimeType.getName() != null &&
!mimeType.getName().equals(""))
{
contentType = mimeType.getName();
}
else
{
contentType = new Tika().detect(dataStoreReference);
}
try
{
File file = new File(new URI(dataStoreReference));
if (!file.exists() || file.isDirectory())
{
String message =
"Could not locate the reference source file(s) in the data store.";
LOGGER.log(Level.FINE, message);
throw new BadRequestException(message);
}
httpHeaders.add("Content-Type", contentType);
httpHeaders.add("Content-Disposition",
"attachment; filename=\"" + file.getName() + "\"");
FileInputStream fis = new FileInputStream(file);
IOUtils.copy(fis, entityStream);
fis.close();
}
catch (URISyntaxException e)
{
String message =
"Problem with the data store URI for the reference source file(s).";
LOGGER.log(Level.FINE, message, e);
throw new NotFoundException(message + " " + e.getMessage());
}
}
}