/**
*
*/
package org.jboss.resteasy.plugins.providers;
import org.jboss.resteasy.annotations.providers.img.ImageWriterParams;
import org.jboss.resteasy.core.LoggerCategories;
import org.jboss.resteasy.util.FindAnnotation;
import org.slf4j.Logger;
import javax.imageio.IIOImage;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.ImageWriteParam;
import javax.imageio.ImageWriter;
import javax.imageio.plugins.jpeg.JPEGImageWriteParam;
import javax.imageio.stream.ImageOutputStream;
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.BufferedOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Locale;
/**
* @author <a href="mailto:ryan@damnhandy.com">Ryan J. McDonough</a>
* @version $Revision:$
*/
@Provider
@Consumes("image/*")
@Produces("image/*")
public class IIOImageProvider extends AbstractEntityProvider<IIOImage>
{
/**
*
*/
private static final Logger logger = LoggerCategories.getProviderLogger();
/**
* @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 IIOImage.class.equals(type);
}
/**
* @param type
* @param genericType
* @param annotations
* @param mediaType
* @param httpHeaders
* @param entityStream
* @return
* @throws IOException
* @throws WebApplicationException
* @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 IIOImage readFrom(Class<IIOImage> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, String> httpHeaders,
InputStream entityStream) throws IOException
{
ImageReader reader = IIOImageProviderHelper.getImageReaderByMediaType(mediaType);
try
{
IIOImage image = IIOImageProviderHelper.readImage(entityStream, reader, 0);
return image;
}
finally
{
reader.dispose();
}
}
/**
* @param type
* @param genericType
* @param annotations
* @return
* @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 IIOImage.class.equals(type);
}
/**
* @param t
* @param type
* @param genericType
* @param annotations
* @param mediaType
* @param httpHeaders
* @param entityStream
* @throws IOException
* @throws WebApplicationException
* @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(IIOImage t,
Class<?> type,
Type genericType,
Annotation[] annotations,
MediaType mediaType,
MultivaluedMap<String, Object> httpHeaders,
OutputStream entityStream) throws IOException
{
ImageWriter writer = IIOImageProviderHelper.getImageWriterByMediaType(mediaType);
ImageWriteParam param;
if (mediaType.equals(MediaType.valueOf("image/jpeg")))
{
param = new JPEGImageWriteParam(Locale.US);
}
else
{
param = writer.getDefaultWriteParam();
}
/*
* If the image output type supports compression, set it to the highest
* maximum
*/
ImageWriterParams writerParams = FindAnnotation.findAnnotation(annotations,
ImageWriterParams.class);
if (writerParams != null)
{
if (param.canWriteCompressed())
{
param.setCompressionMode(writerParams.compressionMode());
param.setCompressionQuality(writerParams.compressionQuality());
}
}
else if (param.canWriteCompressed())
{
param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
param.setCompressionQuality(1.0f);
}
BufferedOutputStream buff = new BufferedOutputStream(entityStream, 2048);
ImageOutputStream ios = ImageIO.createImageOutputStream(buff);
try
{
writer.setOutput(ios);
IIOImage img = new IIOImage(t.getRenderedImage(), null, null);
writer.write(null, img, param);
}
finally
{
writer.dispose();
}
}
}