private NetcdfDataset openDataset(
InvDataset invDataset, boolean acquire, ucar.nc2.util.CancelTask task, Result result)
throws IOException {
IOException saveException = null;
List<InvAccess> accessList =
new ArrayList<InvAccess>(invDataset.getAccess()); // a list of all the accesses
while (accessList.size() > 0) {
InvAccess access = chooseDatasetAccess(accessList);
// no valid access
if (access == null) {
result.errLog.format("No access that could be used in dataset %s %n", invDataset);
if (saveException != null) throw saveException;
return null;
}
String datasetLocation = access.getStandardUrlName();
ServiceType serviceType = access.getService().getServiceType();
if (debugOpen)
System.out.println("ThreddsDataset.openDataset try " + datasetLocation + " " + serviceType);
// deal with RESOLVER type
if (serviceType == ServiceType.RESOLVER) {
InvDatasetImpl rds = openResolver(datasetLocation, task, result);
if (rds == null) return null;
accessList = new ArrayList<InvAccess>(rds.getAccess());
continue;
}
// ready to open it through netcdf API
NetcdfDataset ds;
// try to open
try {
ds = openDataset(access, acquire, task, result);
} catch (IOException e) {
result.errLog.format("Cant open %s %n err=%s%n", datasetLocation, e.getMessage());
if (debugOpen) {
System.out.println("Cant open= " + datasetLocation + " " + serviceType);
e.printStackTrace();
}
accessList.remove(access);
saveException = e;
continue;
}
result.accessUsed = access;
return ds;
} // loop over accesses
if (saveException != null) throw saveException;
return null;
}
private ThreddsDataFactory.Result openFeatureDataset(
FeatureType wantFeatureType, InvAccess access, ucar.nc2.util.CancelTask task, Result result)
throws IOException {
result.featureType = wantFeatureType;
result.accessUsed = access;
// special handling for IMAGE
if (result.featureType == FeatureType.IMAGE) {
result.imageURL = access.getStandardUrlName();
result.location = result.imageURL;
return result;
}
if (access.getService().getServiceType() == ServiceType.CdmrFeature) {
result.featureDataset =
CdmrFeatureDataset.factory(wantFeatureType, access.getStandardUrlName());
} else {
// all other datatypes
NetcdfDataset ncd = openDataset(access, true, task, result);
if (null != ncd) {
result.featureDataset =
FeatureDatasetFactoryManager.wrap(result.featureType, ncd, task, result.errLog);
}
}
if (null == result.featureDataset) result.fatalError = true;
else {
result.location = result.featureDataset.getLocation();
if ((result.featureType == null) && (result.featureDataset != null))
result.featureType = result.featureDataset.getFeatureType();
}
return result;
}
private InvAccess findAccessByServiceType(List<InvAccess> accessList, ServiceType type) {
for (InvAccess a : accessList) {
if (type.toString().equalsIgnoreCase(a.getService().getServiceType().toString())) return a;
}
return null;
}
private NetcdfDataset openDataset(
InvAccess access, boolean acquire, ucar.nc2.util.CancelTask task, Result result)
throws IOException {
InvDataset invDataset = access.getDataset();
String datasetId = invDataset.getID();
String title = invDataset.getName();
String datasetLocation = access.getStandardUrlName();
ServiceType serviceType = access.getService().getServiceType();
if (debugOpen) System.out.println("ThreddsDataset.openDataset= " + datasetLocation);
// deal with RESOLVER type
if (serviceType == ServiceType.RESOLVER) {
InvDatasetImpl rds = openResolver(datasetLocation, task, result);
if (rds == null) return null;
return openDataset(rds, acquire, task, result);
}
// ready to open it through netcdf API
NetcdfDataset ds;
// open DODS type
if ((serviceType == ServiceType.OPENDAP) || (serviceType == ServiceType.DODS)) {
String curl = DODSNetcdfFile.canonicalURL(datasetLocation);
ds =
acquire
? NetcdfDataset.acquireDataset(curl, enhanceMode, task)
: NetcdfDataset.openDataset(curl, enhanceMode, task);
}
// open CdmRemote
else if (serviceType == ServiceType.CdmRemote) {
String curl = CdmRemote.canonicalURL(datasetLocation);
ds =
acquire
? NetcdfDataset.acquireDataset(curl, enhanceMode, task)
: NetcdfDataset.openDataset(curl, enhanceMode, task);
}
/* open ADDE type
else if (serviceType == ServiceType.ADDE) {
try {
ds = ucar.nc2.adde.AddeDatasetFactory.openDataset(access, task);
} catch (IOException e) {
log.append("Cant open as ADDE dataset= "+datasetLocation);
accessList.remove( access);
continue;
}
} */
else {
// open through NetcdfDataset API
ds =
acquire
? NetcdfDataset.acquireDataset(datasetLocation, enhanceMode, task)
: NetcdfDataset.openDataset(datasetLocation, enhanceMode, task);
}
if (ds != null) {
ds.setId(datasetId);
ds.setTitle(title);
annotate(invDataset, ds);
}
// see if there's metadata LOOK whats this
List list = invDataset.getMetadata(MetadataType.NcML);
if (list.size() > 0) {
InvMetadata ncmlMetadata = (InvMetadata) list.get(0);
NcMLReader.wrapNcML(ds, ncmlMetadata.getXlinkHref(), null);
}
result.accessUsed = access;
return ds;
}