/**
* @param provider
* @param properties
*/
public GMLFileResource(GMLCRSProvider provider, Properties properties) {
super(provider, properties, "Dictionary", CommonNamespaces.GML3_2_NS.toASCIIString());
try {
transformations = XMLTools.getElements(getRootElement(), TRANSFORM_XPATH, nsContext);
} catch (XMLParsingException e) {
LOG.logError(e.getLocalizedMessage(), e);
}
cachedWGS84Transformations = new HashMap<CoordinateSystem, Helmert>();
}
public Transformation getTransformation(CoordinateSystem sourceCRS, CoordinateSystem targetCRS) {
if (sourceCRS == null) {
return null;
}
List<Element> toBeRemoved = new ArrayList<Element>(transformations.size());
List<String> sourceIDs = Arrays.asList(sourceCRS.getIdentifiers());
List<String> targetIDs = null;
if (targetCRS != null) {
targetIDs = Arrays.asList(targetCRS.getIdentifiers());
} else {
targetIDs = new ArrayList<String>();
}
Transformation result = null;
for (int i = 0; i < transformations.size() && result == null; ++i) {
Element transElem = transformations.get(i);
if (transElem != null) {
try {
Element sourceCRSProp =
XMLTools.getRequiredElement(transElem, PRE + "sourceCRS", nsContext);
String transformSourceID = null;
String transformTargetID = null;
if (sourceCRSProp != null) {
transformSourceID =
sourceCRSProp.getAttributeNS(CommonNamespaces.XLNNS.toASCIIString(), "href");
if ("".equals(transformSourceID)) {
transformSourceID =
XMLTools.getRequiredNodeAsString(
sourceCRSProp, "*[1]/" + PRE + "identifier", nsContext);
}
}
if (targetCRS != null) {
Element targetCRSProp =
XMLTools.getRequiredElement(transElem, PRE + "targetCRS", nsContext);
if (targetCRSProp != null) {
transformTargetID =
targetCRSProp.getAttributeNS(CommonNamespaces.XLNNS.toASCIIString(), "href");
if ("".equals(transformTargetID)) {
transformTargetID =
XMLTools.getRequiredNodeAsString(
targetCRSProp, "*[1]/" + PRE + "identifier", nsContext);
}
}
}
if (sourceIDs.contains(transformSourceID)) {
result = getProvider().parseTransformation(transElem);
if (targetCRS == null) {
// Trying to find a helmert transformation
LOG.logDebug("Resolving a possible transformation.");
if (result != null && !(result instanceof Helmert)) {
result = getTransformation(result.getTargetCRS(), null);
}
} else {
if (!targetIDs.contains(transformTargetID)) {
LOG.logDebug(
"Found a transformation with gml:id: "
+ transElem.getAttributeNS(CommonNamespaces.GML3_2_NS.toASCIIString(), "id")
+ ", but the target does not match the source crs, trying to build transformation chain.");
Transformation second = getTransformation(result.getTargetCRS(), targetCRS);
if (second != null) {
result = new ConcatenatedTransform(result, second);
} else {
LOG.logDebug(
"The transformation with gml:id: "
+ transElem.getAttributeNS(
CommonNamespaces.GML3_2_NS.toASCIIString(), "id")
+ " is not the start of transformation chain, discarding it. ");
result = null;
}
}
}
}
} catch (XMLParsingException e) {
toBeRemoved.add(transElem);
LOG.logWarning(
"No source CRS id could be found in this transformation(gml:id): "
+ transElem.getAttributeNS(CommonNamespaces.GML3_2_NS.toASCIIString(), "id")
+ " this is not correct, removing transformation from cache.");
LOG.logWarning(e.getMessage());
}
}
if (toBeRemoved.size() > 0) {
transformations.removeAll(toBeRemoved);
}
}
return result;
}