/**
* The write class selects the encoding parameter considering the image format requested. Then,
* the correct writer will encode the img given by the render into the servlet output stream
*
* @param wmsResponse The object used later to build the HTTP response.
* @param output The output stream
* @param format desired image format
* @param img The output image.
* @param pixelSize be provided by the server
* @throws IOException If a problem has been encountered while handling the output stream.
*/
public static void write(
WMSResponse wmsResponse,
OutputStream output,
String format,
BufferedImage img,
double pixelSize)
throws IOException {
if (format.equalsIgnoreCase(ImageFormats.JPEG.toString())) {
writeJPEG(wmsResponse, output, img);
wmsResponse.setResponseCode(200);
LOGGER.debug("JPEG written to the output stream.");
} else if (format.equalsIgnoreCase(ImageFormats.PNG.toString())) {
writePNG(wmsResponse, output, img, pixelSize);
wmsResponse.setResponseCode(200);
LOGGER.debug("PNG written to the output stream.");
} else if (format.equalsIgnoreCase(ImageFormats.TIFF.toString())) {
writeTIFF(wmsResponse, output, img, pixelSize);
LOGGER.debug("TIFF written to the output stream.");
wmsResponse.setResponseCode(200);
} else {
WMS.exceptionDescription(
wmsResponse,
output,
"The format requested is invalid. "
+ "Please check the server capabilities to ask for a supported format.");
}
}
/**
* Handles the getCapabilities request and gives the XML formated server capabilities to the
* outputStream
*
* @param output servlet outputStream
* @param wmsResponse HttpServletResponse modified for WMS use
* @throws WMSException
* @throws UnsupportedEncodingException
*/
public void getCap(OutputStream output, WMSResponse wmsResponse)
throws WMSException, UnsupportedEncodingException {
PrintStream pr = new PrintStream(output, false, "UTF-8");
WMSCapabilities cap = new WMSCapabilities();
// Setting service WMS metadata
cap.setService(getService());
// Setting Capability parameters
// Setting Layers capabilities
Capability c = new Capability();
// Bounding box of the highest layer is dummy
Envelope dummy = new Envelope(WEST, EAST, SOUTH, NORTH);
EXGeographicBoundingBox bb = getGeographicBoundingBox(dummy, "EPSG:4326");
Layer availableLayers = new Layer();
availableLayers.setEXGeographicBoundingBox(bb);
BoundingBox bBox = new BoundingBox();
bBox.setCRS("EPSG:4326");
bBox.setMaxx(EAST);
bBox.setMinx(WEST);
bBox.setMaxy(NORTH);
bBox.setMiny(SOUTH);
availableLayers.getBoundingBox().add(bBox);
for (Layer e : layerMap.values()) {
availableLayers.getLayer().add(e);
}
// Server supported CRS
availableLayers.getCRS().addAll(authCRS);
availableLayers.setName("Available_layers");
availableLayers.setTitle("Server available layers");
c.setLayer(availableLayers);
// Setting the request capabilities
// GetMap capabilities
Request req = new Request();
req.setGetMap(getMapOperation(wmsResponse));
// GetCap capabilities
req.setGetCapabilities(getCapOperation(wmsResponse));
// GetFeatureInfo capabilities
req.setGetFeatureInfo(getFeatureOperation(wmsResponse));
c.setRequest(req);
cap.setCapability(c);
try {
// Marshalling the WMS Capabilities into an XML response
Marshaller marshaller = jaxbContext.createMarshaller();
NamespacePrefixMapper mapper = new NamespaceMapper();
marshaller.setProperty("com.sun.xml.bind.namespacePrefixMapper", mapper);
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
wmsResponse.setContentType("text/xml;charset=UTF-8");
marshaller.marshal(cap, pr);
} catch (JAXBException ex) {
wmsResponse.setContentType("text/xml;charset=UTF-8");
wmsResponse.setResponseCode(500);
pr.append(
"<?xml version='1.0' encoding=\"UTF-8\"?><ServiceExceptionReport xmlns=\"http://www.opengis.net/ogc\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" version=\"1.3.0\" xsi:schemaLocation=\"http://www.opengis.net/ogc http://schemas.opengis.net/wms/1.3.0/exceptions_1_3_0.xsd\"><ServiceException>Something went wrong</ServiceException></ServiceExceptionReport>");
pr.append(ex.toString());
ex.printStackTrace(pr);
}
}
/**
* This method permits to write the result image from the wms request in a jpeg format
*
* @param wmsResponse The object used later to build the HTTP response.
* @param output The output stream
* @param img The output image
* @throws IOException
*/
private static void writeJPEG(WMSResponse wmsResponse, OutputStream output, BufferedImage img)
throws IOException {
wmsResponse.setContentType(ImageFormats.JPEG.toString());
JPEGEncodeParam jEnc = new JPEGEncodeParam();
JAI.create("Encode", img, output, "JPEG", jEnc);
output.close();
}
private OnlineResource buildOnlineResource(WMSResponse wmsResponse, String key, String title) {
OnlineResource oRGet = new OnlineResource();
String map = (String) properties.getProperty(key);
if (map == null) {
oRGet.setHref(wmsResponse.getRequestUrl());
} else {
oRGet.setHref(map);
}
oRGet.setTitle(title);
return oRGet;
}
/**
* This method permits to write the result image from the wms request in a png format
*
* @param wmsResponse The object used later to build the HTTP response.
* @param output The output stream
* @param img The output image
* @param pixelSize The size of the pixels.
* @throws IOException
*/
private static void writePNG(
WMSResponse wmsResponse, OutputStream output, BufferedImage img, double pixelSize)
throws IOException {
wmsResponse.setContentType(ImageFormats.PNG.toString());
int dpm = (int) (1000 / pixelSize + 1);
PNGEncodeParam pEnc = PNGEncodeParam.getDefaultEncodeParam(img);
pEnc.setPhysicalDimension(dpm, dpm, 1);
JAI.create("Encode", img, output, "PNG", pEnc);
output.close();
}
/**
* This method permits to write the result image from the wms request in a tiff format
*
* @param wmsResponse The object used later to build the HTTP response.
* @param output The output stream
* @param img The output image
* @throws IOException
*/
private static void writeTIFF(
WMSResponse wmsResponse, OutputStream output, BufferedImage img, double pixelSize)
throws IOException {
wmsResponse.setContentType(ImageFormats.TIFF.toString());
int dpm = (int) (1000 / pixelSize + 1);
long[] resolution = {dpm, 1};
TIFFField xRes =
new TIFFField(X_RES_TAG, TIFFField.TIFF_RATIONAL, 1, new long[][] {resolution});
TIFFField yRes =
new TIFFField(Y_RES_TAG, TIFFField.TIFF_RATIONAL, 1, new long[][] {resolution});
TIFFEncodeParam tep = new TIFFEncodeParam();
tep.setExtraFields(new TIFFField[] {xRes, yRes});
JAI.create("Encode", img, output, "TIFF", tep);
output.close();
}
