/**
*
*/
package org.jboss.resteasy.plugins.providers;
import javax.activation.DataSource;
import javax.ws.rs.Consumes;
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.Provider;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.SequenceInputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
/**
* @author <a href="mailto:ryan@damnhandy.com">Ryan J. McDonough</a>
* @version $Revision:$
*/
@Provider
@Consumes("*/*")
@Produces("*/*")
public class DataSourceProvider extends AbstractEntityProvider<DataSource>
{
protected static class SequencedDataSource implements DataSource
{
private byte[] byteBuffer;
private int byteBufferOffset;
private int byteBufferLength;
private File tempFile;
private String type;
public SequencedDataSource(byte[] byteBuffer, int byteBufferOffset,
int byteBufferLength, File tempFile, String type)
{
super();
this.byteBuffer = byteBuffer;
this.byteBufferOffset = byteBufferOffset;
this.byteBufferLength = byteBufferLength;
this.tempFile = tempFile;
this.type = type;
}
public String getContentType()
{
return type;
}
public InputStream getInputStream() throws IOException
{
InputStream bis = new ByteArrayInputStream(byteBuffer, byteBufferOffset, byteBufferLength);
if (tempFile == null)
return bis;
InputStream fis = new FileInputStream(tempFile);
return new SequenceInputStream(bis, fis);
}
public String getName()
{
return "";
}
public OutputStream getOutputStream() throws IOException
{
throw new IOException("No output stream allowed");
}
}
/**
* @param in
* @param mediaType
* @return
* @throws IOException
*/
public static DataSource readDataSource(final InputStream in, final MediaType mediaType) throws IOException
{
byte[] memoryBuffer = new byte[4096];
int readCount = in.read(memoryBuffer, 0, memoryBuffer.length);
File tempFile = null;
if (in.available() > 0)
{
tempFile = File.createTempFile("resteasy-provider-datasource", null);
FileOutputStream fos = new FileOutputStream(tempFile);
try
{
ProviderHelper.writeTo(in, fos);
}
finally
{
fos.close();
}
}
if (readCount == -1)
readCount = 0;
return new SequencedDataSource(memoryBuffer, 0, readCount, tempFile, mediaType.toString());
}
/**
* FIXME Comment this
*
* @param type
* @param genericType
* @param annotations
* @return
* @see javax.ws.rs.ext.MessageBodyReader#isReadable(java.lang.Class, java.lang.reflect.Type, java.lang.annotation.Annotation[])
*/
public boolean isReadable(Class<?> type,
Type genericType,
Annotation[] annotations, MediaType mediaType)
{
return DataSource.class.isAssignableFrom(type);
}
/**
* FIXME Comment this
*
* @param type
* @param genericType
* @param annotations
* @param mediaType
* @param httpHeaders
* @param entityStream
* @return
* @throws IOException
* @throws WebApplicationException
* @see @see javax.ws.rs.ext.MessageBodyReader#readFrom(java.lang.Class, java.lang.reflect.Type, java.lang.annotation.Annotation[], javax.ws.rs.core.MediaType, javax.ws.rs.core.MultivaluedMap, java.io.InputStream)
*/
public DataSource readFrom(Class<DataSource> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, String> httpHeaders,
InputStream entityStream) throws IOException
{
return readDataSource(entityStream, mediaType);
}
/**
* FIXME Comment this
*
* @param type
* @param genericType
* @param annotations
* @return
* @see @see javax.ws.rs.ext.MessageBodyWriter#isWriteable(java.lang.Class, java.lang.reflect.Type, java.lang.annotation.Annotation[])
*/
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
{
return DataSource.class.isAssignableFrom(type);
}
/**
* FIXME Comment this
*
* @param dataSource
* @param type
* @param genericType
* @param annotations
* @param mediaType
* @param httpHeaders
* @param entityStream
* @throws IOException
* @throws WebApplicationException
* @see @see javax.ws.rs.ext.MessageBodyWriter#writeTo(java.lang.Object, java.lang.Class, java.lang.reflect.Type, java.lang.annotation.Annotation[], javax.ws.rs.core.MediaType, javax.ws.rs.core.MultivaluedMap, java.io.OutputStream)
*/
public void writeTo(DataSource dataSource,
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, Object> httpHeaders,
OutputStream entityStream) throws IOException
{
InputStream in = dataSource.getInputStream();
try
{
ProviderHelper.writeTo(in, entityStream);
}
finally
{
in.close();
}
}
}