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package org.glassfish.jersey.message.internal;
import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
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.Iterator;
import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.ImageWriter;
import javax.imageio.stream.ImageInputStream;
import javax.inject.Singleton;
/**
* Provider for marshalling/un-marshalling of graphical image data represented as
* {@code image/*, application/x-www-form-urlencoded} entity types to
* {@link RenderedImage rendered} and from {@link RenderedImage rendered} or
* {@link BufferedImage buffered} image instance.
*
* @author Paul Sandoz
* @author Marek Potociar (marek.potociar at oracle.com)
*/
@Produces("image/*")
@Consumes({"image/*", "application/octet-stream"})
@Singleton
public final class RenderedImageProvider extends AbstractMessageReaderWriterProvider<RenderedImage> {
private static final MediaType IMAGE_MEDIA_TYPE = new MediaType("image", "*");
@Override
public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return RenderedImage.class == type || BufferedImage.class == type;
}
@Override
public RenderedImage readFrom(
Class<RenderedImage> type,
Type genericType,
Annotation annotations[],
MediaType mediaType,
MultivaluedMap<String, String> httpHeaders,
InputStream entityStream) throws IOException {
if (IMAGE_MEDIA_TYPE.isCompatible(mediaType)) {
Iterator<ImageReader> readers = ImageIO.getImageReadersByMIMEType(mediaType.toString());
if (!readers.hasNext()) {
throw new IOException("The image-based media type " + mediaType + "is not supported for reading");
}
ImageReader reader = readers.next();
ImageInputStream in = ImageIO.createImageInputStream(entityStream);
reader.setInput(in, true, true);
BufferedImage bi = reader.read(0, reader.getDefaultReadParam());
in.close();
reader.dispose();
return bi;
} else {
return ImageIO.read(entityStream);
}
}
@Override
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
return RenderedImage.class.isAssignableFrom(type);
}
@Override
public void writeTo(
RenderedImage t,
Class<?> type,
Type genericType,
Annotation annotations[],
MediaType mediaType,
MultivaluedMap<String, Object> httpHeaders,
OutputStream entityStream) throws IOException {
String formatName = getWriterFormatName(mediaType);
if (formatName == null) {
throw new IOException("The image-based media type " + mediaType + " is not supported for writing");
}
ImageIO.write(t, formatName, entityStream);
}
private String getWriterFormatName(MediaType t) {
return getWriterFormatName(t.toString());
}
private String getWriterFormatName(String t) {
Iterator<ImageWriter> i = ImageIO.getImageWritersByMIMEType(t);
if (!i.hasNext()) {
return null;
}
return i.next().getOriginatingProvider().getFormatNames()[0];
}
}