/**
* Resolve COLLADA references relative to the COLLADA document. If the reference is relative then
* it will resolved relative to the .dae file, not the kml file. If the COLLADA document may be
* contained in a KMZ archive the resources will be resolved relative to the .dae file within the
* archive. Normally references in a KMZ are resolved relative to the root of the archive, but
* Model references are an exception. See
* https://developers.google.com/kml/documentation/kmzarchives and
* https://developers.google.com/kml/documentation/kmlreference#model
*
* <p>{@inheritDoc}.
*/
public String resolveFilePath(String path) throws IOException {
KMLLink link = this.model.getLink();
// Check the resource map to see if an alias is defined for this resource.
String alias = this.resourceMap.get(path);
if (alias != null) path = alias;
// If the path is relative then resolve it relative to the COLLADA file.
File f = new File(path);
if (!f.isAbsolute() && link != null && link.getHref() != null) {
try {
URI base = new URI(null, link.getHref(), null);
URI ref = new URI(null, path, null);
path = base.resolve(ref).getPath();
} catch (URISyntaxException ignored) {
// Ignored
}
}
Object o = this.parent.getRoot().resolveReference(path);
if (o instanceof URL || o instanceof String) return o.toString();
return null;
}
/**
* Returns whether this placemark must retrieve its model resource. This always returns <code>
* false</code> if this placemark has no <code>KMLLink</code>.
*
* @return <code>true</code> if this placemark must retrieve its model resource, otherwise <code>
* false</code>.
*/
protected boolean mustRetrieveResource() {
KMLLink link = this.model.getLink();
if (link == null) return false;
// The resource must be retrieved if the link has been updated since the resource was
// last retrieved, or if the resource has never been retrieved.
return this.getColladaRoot() == null || link.getUpdateTime() > this.resourceRetrievalTime.get();
}
/**
* Thread's off a task to determine whether the resource is local or remote and then retrieves it
* either from disk cache or a remote server.
*
* @param dc the current draw context.
*/
protected void requestResource(DrawContext dc) {
if (WorldWind.getTaskService().isFull()) return;
KMLLink link = this.model.getLink();
if (link == null) return;
String address = link.getAddress(dc);
if (address != null) address = address.trim();
if (WWUtil.isEmpty(address)) return;
WorldWind.getTaskService().addTask(new RequestTask(this, address));
}