/**
* Every Layer shall have exactly one <LatLonBoundingBox> element that is either stated
* explicitly or inherited from a parent Layer. LatLonBoundingBox states the minimum bounding
* rectangle of the map data in the EPSG:4326 geographic coordinate system. The LatLonBoundingBox
* attributes minx, miny, maxx, maxy indicate the edges of an enclosing rectangle in decimal
* degrees. LatLonBoundingBox shall be supplied regardless of what SRS the map server may support,
* but it may be approximate if EPSG:4326 is not supported. Its purpose is to facilitate
* geographic searches without requiring coordinate transformations by the search engine.
*
* @return the bbox
*/
public Envelope getLatLonBoundingBox() {
if ((latLonBoundingBox == null) && (parent != null)) {
return parent.getLatLonBoundingBox();
}
return latLonBoundingBox;
}
/**
* returns the layers offered by the WMPS
*
* @param layerElem
* @param parent
* @return Layer
* @throws XMLParsingException
* @throws UnknownCRSException
*/
protected Layer parseLayers(Element layerElem, Layer parent)
throws XMLParsingException, UnknownCRSException {
LOG.entering();
boolean queryable = XMLTools.getNodeAsBoolean(layerElem, "./@queryable", nsContext, false);
int cascaded = XMLTools.getNodeAsInt(layerElem, "./@cascaded", nsContext, 0);
boolean opaque = XMLTools.getNodeAsBoolean(layerElem, "./@opaque", nsContext, false);
boolean noSubsets = XMLTools.getNodeAsBoolean(layerElem, "./@noSubsets", nsContext, false);
int fixedWidth = XMLTools.getNodeAsInt(layerElem, "./@fixedWidth", nsContext, 0);
int fixedHeight = XMLTools.getNodeAsInt(layerElem, "./@fixedHeight", nsContext, 0);
String name = XMLTools.getNodeAsString(layerElem, "./Name", nsContext, null);
String title = XMLTools.getRequiredNodeAsString(layerElem, "./Title", nsContext);
String layerAbstract = XMLTools.getNodeAsString(layerElem, "./Abstract", nsContext, null);
String[] keywords = XMLTools.getNodesAsStrings(layerElem, "./KeywordList/Keyword", nsContext);
String[] srs = XMLTools.getNodesAsStrings(layerElem, "./SRS", nsContext);
List nl = XMLTools.getNodes(layerElem, "./BoundingBox", nsContext);
// TODO substitue with Envelope
LayerBoundingBox[] bboxes = null;
if (nl.size() == 0 && parent != null) {
// inherit BoundingBoxes from parent layer
bboxes = parent.getBoundingBoxes();
} else {
bboxes = parseLayerBoundingBoxes(nl);
}
Element llBox = (Element) XMLTools.getNode(layerElem, "./LatLonBoundingBox", nsContext);
Envelope llBoundingBox = null;
if (llBox == null && parent != null) {
// inherit LatLonBoundingBox parent layer
llBoundingBox = parent.getLatLonBoundingBox();
} else if (llBox != null) {
llBoundingBox = parseLatLonBoundingBox(llBox);
} else {
/** Default crs = EPSG:4326 */
CoordinateSystem crs = CRSFactory.create("EPSG:4326");
llBoundingBox = GeometryFactory.createEnvelope(-180, -90, 180, 90, crs);
}
Dimension[] dimensions = parseDimensions(layerElem);
Extent[] extents = parseExtents(layerElem);
Attribution attribution = parseAttribution(layerElem);
AuthorityURL[] authorityURLs = parseAuthorityURLs(layerElem);
MetadataURL[] metadataURLs = parseMetadataURLs(layerElem);
DataURL[] dataURLs = parseDataURL(layerElem);
Identifier[] identifiers = parseIdentifiers(layerElem);
FeatureListURL[] featureListURLs = parseFeatureListURL(layerElem);
Style[] styles = parseStyles(layerElem);
ScaleHint scaleHint = parseScaleHint(layerElem);
Layer layer =
new Layer(
queryable,
cascaded,
opaque,
noSubsets,
fixedWidth,
fixedHeight,
name,
title,
layerAbstract,
llBoundingBox,
attribution,
scaleHint,
keywords,
srs,
bboxes,
dimensions,
extents,
authorityURLs,
identifiers,
metadataURLs,
dataURLs,
featureListURLs,
styles,
null,
null,
parent);
// get Child layers
nl = XMLTools.getNodes(layerElem, "./Layer", nsContext);
Layer[] layers = new Layer[nl.size()];
for (int i = 0; i < layers.length; i++) {
layers[i] = parseLayers((Element) nl.get(i), layer);
}
// set child layers
layer.setLayer(layers);
LOG.exiting();
return layer;
}