/** @param layerTree */
private void handleLayerTree(final LayerTree layerTree) {
final List<LayerInfo> data = new ArrayList<LayerInfo>(layerTree.getData());
final Collection<LayerTree> children = layerTree.getChildrens();
Collections.sort(
data,
new Comparator<LayerInfo>() {
public int compare(LayerInfo o1, LayerInfo o2) {
return o1.getName().compareTo(o2.getName());
}
});
for (LayerInfo layer : data) {
// no sense in exposing a geometryless layer through wms...
boolean wmsExposable = false;
if (layer.getType() == Type.RASTER || layer.getType() == Type.WMS) {
wmsExposable = true;
} else {
try {
wmsExposable =
layer.getType() == Type.VECTOR
&& ((FeatureTypeInfo) layer.getResource())
.getFeatureType()
.getGeometryDescriptor()
!= null;
} catch (Exception e) {
LOGGER.log(
Level.SEVERE,
"An error occurred trying to determine if" + " the layer is geometryless",
e);
}
}
// ask for enabled() instead of isEnabled() to account for disabled resource/store
if (layer.enabled() && wmsExposable) {
try {
handleLayer(layer);
} catch (Exception e) {
// report what layer we failed on to help the admin locate and fix it
throw new ServiceException(
"Error occurred trying to write out metadata for layer: " + layer.getName(), e);
}
}
}
for (LayerTree childLayerTree : children) {
start("Layer");
element("Name", childLayerTree.getName());
element("Title", childLayerTree.getName());
handleLayerTree(childLayerTree);
end("Layer");
}
}
/**
* Handles the encoding of the layers elements.
*
* <p>This method does a search over the SRS of all the layers to see if there are at least a
* common one, as needed by the spec: "<i>The root Layer element shall include a sequence of
* zero or more <SRS> elements listing all SRSes that are common to all subsidiary layers.
* Use a single SRS element with empty content (like so: "<SRS></SRS>") if there is
* no common SRS."</i>
*
* <p>By the other hand, this search is also used to collecto the whole latlon bbox, as stated
* by the spec: <i>"The bounding box metadata in Capabilities XML specify the minimum enclosing
* rectangle for the layer as a whole."</i>
*
* @task TODO: manage this differently when we have the layer list of the WMS service decoupled
* from the feature types configured for the server instance. (This involves nested layers,
* gridcoverages, etc)
*/
private void handleLayers() {
start("Layer");
final List<LayerInfo> layers;
// filter the layers if a namespace filter has been set
if (request.getNamespace() != null) {
final List<LayerInfo> allLayers = wmsConfig.getLayers();
layers = new ArrayList<LayerInfo>();
String namespace = wmsConfig.getNamespaceByPrefix(request.getNamespace());
for (LayerInfo layer : allLayers) {
Name name = layer.getResource().getQualifiedName();
if (name.getNamespaceURI().equals(namespace)) {
layers.add(layer);
}
}
} else {
layers = wmsConfig.getLayers();
}
WMSInfo serviceInfo = wmsConfig.getServiceInfo();
element("Title", serviceInfo.getTitle());
element("Abstract", serviceInfo.getAbstract());
List<String> srsList = serviceInfo.getSRS();
Set<String> srs = new HashSet<String>();
if (srsList != null) {
srs.addAll(srsList);
}
handleRootCrsList(srs);
handleRootBbox(layers);
// now encode each layer individually
LayerTree featuresLayerTree = new LayerTree(layers);
handleLayerTree(featuresLayerTree);
try {
List<LayerGroupInfo> layerGroups = wmsConfig.getLayerGroups();
handleLayerGroups(new ArrayList<LayerGroupInfo>(layerGroups));
} catch (FactoryException e) {
throw new RuntimeException("Can't obtain Envelope of Layer-Groups: " + e.getMessage(), e);
} catch (TransformException e) {
throw new RuntimeException("Can't obtain Envelope of Layer-Groups: " + e.getMessage(), e);
}
end("Layer");
}
/**
* Called by <code>handleLayers()</code>, writes down list of supported CRS's for the root
* Layer.
*
* <p>If <code>epsgCodes</code> is not empty, the list of supported CRS identifiers written down
* to the capabilities document is limited to those in the <code>epsgCodes</code> list.
* Otherwise, all the GeoServer supported CRS identifiers are used.
*
* @param epsgCodes possibly empty set of CRS identifiers to limit the number of SRS elements
* to.
*/
private void handleRootCrsList(final Set<String> epsgCodes) {
final Set<String> capabilitiesCrsIdentifiers;
if (epsgCodes.isEmpty()) {
comment("All supported EPSG projections:");
capabilitiesCrsIdentifiers = new LinkedHashSet<String>();
for (String code : CRS.getSupportedCodes("AUTO")) {
if ("WGS84(DD)".equals(code)) continue;
capabilitiesCrsIdentifiers.add("AUTO:" + code);
}
capabilitiesCrsIdentifiers.addAll(CRS.getSupportedCodes("EPSG"));
} else {
comment("Limited list of EPSG projections:");
capabilitiesCrsIdentifiers = new TreeSet<String>(epsgCodes);
}
try {
Iterator<String> it = capabilitiesCrsIdentifiers.iterator();
String currentSRS;
while (it.hasNext()) {
currentSRS = it.next();
if (currentSRS.indexOf(':') == -1) {
currentSRS = EPSG + currentSRS;
}
element("SRS", currentSRS);
}
} catch (Exception e) {
LOGGER.log(Level.WARNING, e.getLocalizedMessage(), e);
}
}
protected void handleAttribution(LayerInfo layer) {
AttributionInfo attribution = layer.getAttribution();
String title = attribution.getTitle();
String url = attribution.getHref();
String logoURL = attribution.getLogoURL();
String logoType = attribution.getLogoType();
int logoWidth = attribution.getLogoWidth();
int logoHeight = attribution.getLogoHeight();
boolean titleGood = (title != null),
urlGood = (url != null),
logoGood = (logoURL != null && logoType != null && logoWidth > 0 && logoHeight > 0);
if (titleGood || urlGood || logoGood) {
start("Attribution");
if (titleGood) element("Title", title);
if (urlGood) {
AttributesImpl urlAttributes = new AttributesImpl();
urlAttributes.addAttribute("", "xmlns:xlink", "xmlns:xlink", "", XLINK_NS);
urlAttributes.addAttribute(XLINK_NS, "type", "xlink:type", "", "simple");
urlAttributes.addAttribute(XLINK_NS, "href", "xlink:href", "", url);
element("OnlineResource", null, urlAttributes);
}
if (logoGood) {
AttributesImpl logoAttributes = new AttributesImpl();
logoAttributes.addAttribute("", "", "height", "", "" + logoHeight);
logoAttributes.addAttribute("", "", "width", "", "" + logoWidth);
start("LogoURL", logoAttributes);
element("Format", logoType);
AttributesImpl urlAttributes = new AttributesImpl();
urlAttributes.addAttribute("", "xmlns:xlink", "xmlns:xlink", "", XLINK_NS);
urlAttributes.addAttribute(XLINK_NS, "type", "xlink:type", "", "simple");
urlAttributes.addAttribute(XLINK_NS, "href", "xlink:href", "", logoURL);
element("OnlineResource", null, urlAttributes);
end("LogoURL");
}
end("Attribution");
}
}
private void handleException() {
start("Exception");
for (String exceptionFormat : GetCapabilitiesTransformer.EXCEPTION_FORMATS) {
element("Format", exceptionFormat);
}
end("Exception");
}
/**
* Turns the keyword list to XML
*
* @param keywords
*/
private void handleKeywordList(List<String> keywords) {
start("KeywordList");
if (keywords != null) {
for (Iterator<String> it = keywords.iterator(); it.hasNext(); ) {
element("Keyword", it.next());
}
}
end("KeywordList");
}
/**
* Turns the metadata URL list to XML
*
* @param keywords
*/
private void handleMetadataList(Collection<MetadataLinkInfo> metadataURLs) {
if (metadataURLs == null) {
return;
}
for (MetadataLinkInfo link : metadataURLs) {
AttributesImpl lnkAtts = new AttributesImpl();
lnkAtts.addAttribute("", "type", "type", "", link.getMetadataType());
start("MetadataURL", lnkAtts);
element("Format", link.getType());
AttributesImpl orAtts = new AttributesImpl();
orAtts.addAttribute("", "xmlns:xlink", "xmlns:xlink", "", XLINK_NS);
orAtts.addAttribute(XLINK_NS, "xlink:type", "xlink:type", "", "simple");
orAtts.addAttribute("", "xlink:href", "xlink:href", "", link.getContent());
element("OnlineResource", null, orAtts);
end("MetadataURL");
}
}
/**
* Encodes a LatLonBoundingBox for the given Envelope.
*
* @param bbox
*/
private void handleLatLonBBox(Envelope bbox) {
String minx = String.valueOf(bbox.getMinX());
String miny = String.valueOf(bbox.getMinY());
String maxx = String.valueOf(bbox.getMaxX());
String maxy = String.valueOf(bbox.getMaxY());
AttributesImpl bboxAtts = new AttributesImpl();
bboxAtts.addAttribute("", "minx", "minx", "", minx);
bboxAtts.addAttribute("", "miny", "miny", "", miny);
bboxAtts.addAttribute("", "maxx", "maxx", "", maxx);
bboxAtts.addAttribute("", "maxy", "maxy", "", maxy);
element("LatLonBoundingBox", null, bboxAtts);
}
/**
* Encodes a <code>DCPType</code> fragment for HTTP GET and POST methods.
*
* @param getUrl the URL of the onlineresource for HTTP GET method requests
* @param postUrl the URL of the onlineresource for HTTP POST method requests
*/
private void handleDcpType(String getUrl, String postUrl) {
AttributesImpl orAtts = new AttributesImpl();
orAtts.addAttribute("", "xmlns:xlink", "xmlns:xlink", "", XLINK_NS);
orAtts.addAttribute("", "xlink:type", "xlink:type", "", "simple");
orAtts.addAttribute("", "xlink:href", "xlink:href", "", getUrl);
start("DCPType");
start("HTTP");
if (getUrl != null) {
start("Get");
element("OnlineResource", null, orAtts);
end("Get");
}
if (postUrl != null) {
orAtts.setAttribute(2, "", "xlink:href", "xlink:href", "", postUrl);
start("Post");
element("OnlineResource", null, orAtts);
end("Post");
}
end("HTTP");
end("DCPType");
}
/** Encodes the service metadata section of a WMS capabilities document. */
private void handleService() {
start("Service");
final WMSInfo serviceInfo = wmsConfig.getServiceInfo();
element("Name", "OGC:WMS");
element("Title", serviceInfo.getTitle());
element("Abstract", serviceInfo.getAbstract());
handleKeywordList(serviceInfo.getKeywords());
AttributesImpl orAtts = new AttributesImpl();
orAtts.addAttribute("", "xmlns:xlink", "xmlns:xlink", "", XLINK_NS);
orAtts.addAttribute(XLINK_NS, "xlink:type", "xlink:type", "", "simple");
String onlineResource = serviceInfo.getOnlineResource();
if (onlineResource == null || onlineResource.trim().length() == 0) {
String requestBaseUrl = request.getBaseUrl();
onlineResource = buildURL(requestBaseUrl, null, null, URLType.SERVICE);
} else {
try {
new URL(onlineResource);
} catch (MalformedURLException e) {
LOGGER.log(
Level.WARNING,
"WMS online resource seems to be an invalid URL: '" + onlineResource + "'");
}
}
orAtts.addAttribute("", "xlink:href", "xlink:href", "", onlineResource);
element("OnlineResource", null, orAtts);
GeoServer geoServer = wmsConfig.getGeoServer();
ContactInfo contact = geoServer.getGlobal().getContact();
handleContactInfo(contact);
element("Fees", serviceInfo.getFees());
element("AccessConstraints", serviceInfo.getAccessConstraints());
end("Service");
}
protected void handleLayerGroups(List<LayerGroupInfo> layerGroups)
throws FactoryException, TransformException {
if (layerGroups == null || layerGroups.size() == 0) {
return;
}
Collections.sort(
layerGroups,
new Comparator<LayerGroupInfo>() {
public int compare(LayerGroupInfo o1, LayerGroupInfo o2) {
return o1.getName().compareTo(o2.getName());
}
});
for (LayerGroupInfo layerGroup : layerGroups) {
String layerName = layerGroup.getName();
AttributesImpl qatts = new AttributesImpl();
boolean queryable = wmsConfig.isQueryable(layerGroup);
qatts.addAttribute("", "queryable", "queryable", "", queryable ? "1" : "0");
// qatts.addAttribute("", "opaque", "opaque", "", "1");
// qatts.addAttribute("", "cascaded", "cascaded", "", "1");
start("Layer", qatts);
element("Name", layerName);
element("Title", layerName);
element("Abstract", "Layer-Group type layer: " + layerName);
final ReferencedEnvelope layerGroupBounds = layerGroup.getBounds();
final ReferencedEnvelope latLonBounds =
layerGroupBounds.transform(DefaultGeographicCRS.WGS84, true);
String authority =
layerGroupBounds
.getCoordinateReferenceSystem()
.getIdentifiers()
.toArray()[0]
.toString();
element("SRS", authority);
handleLatLonBBox(latLonBounds);
handleBBox(layerGroupBounds, authority);
// Aggregated metadata links (see GEOS-4500)
List<LayerInfo> layers = layerGroup.getLayers();
Set<MetadataLinkInfo> aggregatedLinks = new HashSet<MetadataLinkInfo>();
for (LayerInfo layer : layers) {
List<MetadataLinkInfo> metadataLinks = layer.getResource().getMetadataLinks();
if (metadataLinks != null) {
aggregatedLinks.addAll(metadataLinks);
}
}
handleMetadataList(aggregatedLinks);
// the layer style is not provided since the group does just have
// one possibility, the lack of styles that will make it use
// the default ones for each layer
end("Layer");
}
}
/**
* Calls super.handleFeatureType to add common FeatureType content such as Name, Title and
* LatLonBoundingBox, and then writes WMS specific layer properties as Styles, Scale Hint, etc.
*
* @throws IOException
* @task TODO: write wms specific elements.
*/
@SuppressWarnings("deprecation")
protected void handleLayer(final LayerInfo layer) {
// HACK: by now all our layers are queryable, since they reference
// only featuretypes managed by this server
AttributesImpl qatts = new AttributesImpl();
boolean queryable = wmsConfig.isQueryable(layer);
qatts.addAttribute("", "queryable", "queryable", "", queryable ? "1" : "0");
start("Layer", qatts);
element("Name", layer.getResource().getNamespace().getPrefix() + ":" + layer.getName());
// REVISIT: this is bad, layer should have title and anbstract by itself
element("Title", layer.getResource().getTitle());
element("Abstract", layer.getResource().getAbstract());
handleKeywordList(layer.getResource().getKeywords());
/**
* @task REVISIT: should getSRS() return the full URL? no - the spec says it should be a set
* of <SRS>EPSG:#</SRS>...
*/
final String srs = layer.getResource().getSRS();
element("SRS", srs);
// DJB: I want to be nice to the people reading the capabilities
// file - I'm going to get the
// human readable name and stick it in the capabilities file
// NOTE: this isnt well done because "comment()" isnt in the
// ContentHandler interface...
try {
CoordinateReferenceSystem crs = layer.getResource().getCRS();
String desc = "WKT definition of this CRS:\n" + crs;
comment(desc);
} catch (Exception e) {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.log(Level.WARNING, e.getLocalizedMessage(), e);
}
}
Envelope bbox;
try {
bbox = layer.getResource().boundingBox();
} catch (Exception e) {
throw new RuntimeException(
"Unexpected error obtaining bounding box for layer " + layer.getName(), e);
}
Envelope llbbox = layer.getResource().getLatLonBoundingBox();
handleLatLonBBox(llbbox);
// the native bbox might be null
if (bbox != null) {
handleBBox(bbox, srs);
}
// handle dimensions
String timeMetadata = null;
String elevationMetadata = null;
if (layer.getType() == Type.VECTOR) {
dimensionHelper.handleVectorLayerDimensions(layer);
} else if (layer.getType() == Type.RASTER) {
dimensionHelper.handleRasterLayerDimensions(layer);
}
// handle data attribution
handleAttribution(layer);
// handle metadata URLs
handleMetadataList(layer.getResource().getMetadataLinks());
if (layer.getResource() instanceof WMSLayerInfo) {
// do nothing for the moment, we may want to list the set of cascaded named styles
// in the future (when we add support for that)
} else {
// add the layer style
start("Style");
StyleInfo defaultStyle = layer.getDefaultStyle();
if (defaultStyle == null) {
throw new NullPointerException("Layer " + layer.getName() + " has no default style");
}
Style ftStyle;
try {
ftStyle = defaultStyle.getStyle();
} catch (IOException e) {
throw new RuntimeException(e);
}
element("Name", defaultStyle.getName());
element("Title", ftStyle.getTitle());
element("Abstract", ftStyle.getAbstract());
handleLegendURL(layer.getName(), layer.getLegend(), null);
end("Style");
Set<StyleInfo> styles = layer.getStyles();
for (StyleInfo styleInfo : styles) {
try {
ftStyle = styleInfo.getStyle();
} catch (IOException e) {
throw new RuntimeException(e);
}
start("Style");
element("Name", styleInfo.getName());
element("Title", ftStyle.getTitle());
element("Abstract", ftStyle.getAbstract());
handleLegendURL(layer.getName(), null, styleInfo);
end("Style");
}
}
end("Layer");
}
private void handleRequest() {
start("Request");
start("GetCapabilities");
element("Format", WMS_CAPS_MIME);
// build the service URL and make sure it ends with &
String serviceUrl =
buildURL(request.getBaseUrl(), "wms", params("SERVICE", "WMS"), URLType.SERVICE);
serviceUrl = appendQueryString(serviceUrl, "");
handleDcpType(serviceUrl, serviceUrl);
end("GetCapabilities");
start("GetMap");
List<String> sortedFormats = new ArrayList<String>(getMapFormats);
Collections.sort(sortedFormats);
// this is a hack necessary to make cite tests pass: we need an output format
// that is equal to the mime type as the first one....
if (sortedFormats.contains("image/png")) {
sortedFormats.remove("image/png");
sortedFormats.add(0, "image/png");
}
for (Iterator<String> it = sortedFormats.iterator(); it.hasNext(); ) {
element("Format", String.valueOf(it.next()));
}
handleDcpType(serviceUrl, null);
end("GetMap");
start("GetFeatureInfo");
for (String format : wmsConfig.getAvailableFeatureInfoFormats()) {
element("Format", format);
}
handleDcpType(serviceUrl, serviceUrl);
end("GetFeatureInfo");
start("DescribeLayer");
element("Format", DescribeLayerResponse.DESCLAYER_MIME_TYPE);
handleDcpType(serviceUrl, null);
end("DescribeLayer");
start("GetLegendGraphic");
for (String format : getLegendGraphicFormats) {
element("Format", format);
}
handleDcpType(serviceUrl, null);
end("GetLegendGraphic");
start("GetStyles");
element("Format", GetStylesResponse.SLD_MIME_TYPE);
handleDcpType(serviceUrl, null);
end("GetStyles");
end("Request");
}
/**
* Encodes contact information in the WMS capabilities document
*
* @param geoServer
*/
public void handleContactInfo(ContactInfo contact) {
start("ContactInformation");
start("ContactPersonPrimary");
element("ContactPerson", contact.getContactPerson());
element("ContactOrganization", contact.getContactOrganization());
end("ContactPersonPrimary");
element("ContactPosition", contact.getContactPosition());
start("ContactAddress");
element("AddressType", contact.getAddressType());
element("Address", contact.getAddress());
element("City", contact.getAddressCity());
element("StateOrProvince", contact.getAddressState());
element("PostCode", contact.getAddressPostalCode());
element("Country", contact.getAddressCountry());
end("ContactAddress");
element("ContactVoiceTelephone", contact.getContactVoice());
element("ContactFacsimileTelephone", contact.getContactFacsimile());
element("ContactElectronicMailAddress", contact.getContactEmail());
end("ContactInformation");
}
/**
* Writes layer LegendURL pointing to the user supplied icon URL, if any, or to the proper
* GetLegendGraphic operation if an URL was not supplied by configuration file.
*
* <p>It is common practice to supply a URL to a WMS accesible legend graphic when it is
* difficult to create a dynamic legend for a layer.
*
* @param ft The FeatureTypeInfo that holds the legendURL to write out, or<code>null</code> if
* dynamically generated.
* @task TODO: figure out how to unhack legend parameters such as WIDTH, HEIGHT and FORMAT
*/
protected void handleLegendURL(String layerName, LegendInfo legend, StyleInfo style) {
if (legend != null) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine("using user supplied legend URL");
}
AttributesImpl attrs = new AttributesImpl();
attrs.addAttribute("", "width", "width", "", String.valueOf(legend.getWidth()));
attrs.addAttribute("", "height", "height", "", String.valueOf(legend.getHeight()));
start("LegendURL", attrs);
element("Format", legend.getFormat());
attrs.clear();
attrs.addAttribute("", "xmlns:xlink", "xmlns:xlink", "", XLINK_NS);
attrs.addAttribute(XLINK_NS, "type", "xlink:type", "", "simple");
attrs.addAttribute(XLINK_NS, "href", "xlink:href", "", legend.getOnlineResource());
element("OnlineResource", null, attrs);
end("LegendURL");
} else {
String defaultFormat = GetLegendGraphicRequest.DEFAULT_FORMAT;
if (null == wmsConfig.getLegendGraphicOutputFormat(defaultFormat)) {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.warning(
new StringBuffer("Default legend format (")
.append(defaultFormat)
.append(")is not supported (jai not available?), can't add LegendURL element")
.toString());
}
return;
}
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.fine("Adding GetLegendGraphic call as LegendURL");
}
AttributesImpl attrs = new AttributesImpl();
attrs.addAttribute(
"", "width", "width", "", String.valueOf(GetLegendGraphicRequest.DEFAULT_WIDTH));
// DJB: problem here is that we do not know the size of the
// legend apriori - we need
// to make one and find its height. Not the best way, but it
// would work quite well.
// This was advertising a 20*20 icon, but actually producing
// ones of a different size.
// An alternative is to just scale the resulting icon to what
// the server requested, but this isnt
// the nicest thing since warped images dont look nice. The
// client should do the warping.
// however, to actually estimate the size is a bit difficult.
// I'm going to do the scaling
// so it obeys the what the request says. For people with a
// problem with that should consider
// changing the default size here so that the request is for the
// correct size.
attrs.addAttribute(
"", "height", "height", "", String.valueOf(GetLegendGraphicRequest.DEFAULT_HEIGHT));
start("LegendURL", attrs);
element("Format", defaultFormat);
attrs.clear();
Map<String, String> params =
params(
"request",
"GetLegendGraphic",
"format",
defaultFormat,
"width",
String.valueOf(GetLegendGraphicRequest.DEFAULT_WIDTH),
"height",
String.valueOf(GetLegendGraphicRequest.DEFAULT_HEIGHT),
"layer",
layerName);
if (style != null) {
params.put("style", style.getName());
}
String legendURL = buildURL(request.getBaseUrl(), "wms", params, URLType.SERVICE);
attrs.addAttribute("", "xmlns:xlink", "xmlns:xlink", "", XLINK_NS);
attrs.addAttribute(XLINK_NS, "type", "xlink:type", "", "simple");
attrs.addAttribute(XLINK_NS, "href", "xlink:href", "", legendURL);
element("OnlineResource", null, attrs);
end("LegendURL");
}
}