private InvAccess getImageAccess(
InvDataset invDataset, ucar.nc2.util.CancelTask task, Result result) {
List<InvAccess> accessList =
new ArrayList<InvAccess>(invDataset.getAccess()); // a list of all the accesses
while (accessList.size() > 0) {
InvAccess access = chooseImageAccess(accessList);
if (access != null) return access;
// next choice is resolver type.
access = invDataset.getAccess(ServiceType.RESOLVER);
// no valid access
if (access == null) {
result.errLog.format("No access that could be used for Image Type %s %n", invDataset);
return null;
}
// deal with RESOLVER type
String datasetLocation = access.getStandardUrlName();
InvDatasetImpl rds = openResolver(datasetLocation, task, result);
if (rds == null) return null;
// use the access list from the resolved dataset
accessList = new ArrayList<InvAccess>(invDataset.getAccess());
} // loop over accesses
return null;
}
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;
}
/**
* Find the "best" access in case theres more than one, based on what the CDM knows how to open
* and use.
*
* @param accessList choose from this list.
* @return best access method.
*/
public InvAccess chooseDatasetAccess(List<InvAccess> accessList) {
if (accessList.size() == 0) return null;
InvAccess access = null;
if (preferCdm) access = findAccessByServiceType(accessList, ServiceType.CdmRemote);
if (access == null)
access =
findAccessByServiceType(
accessList, ServiceType.FILE); // should mean that it can be opened through netcdf API
if (access == null)
access =
findAccessByServiceType(
accessList, ServiceType.NETCDF); // ServiceType.NETCDF is deprecated, use FILE
if (access == null) access = findAccessByServiceType(accessList, ServiceType.DODS);
if (access == null) access = findAccessByServiceType(accessList, ServiceType.OPENDAP);
if (access == null) access = findAccessByServiceType(accessList, ServiceType.CdmRemote);
// look for HTTP with format we can read
if (access == null) {
InvAccess tryAccess = findAccessByServiceType(accessList, ServiceType.HTTPServer);
if (tryAccess == null)
tryAccess =
findAccessByServiceType(
accessList, ServiceType.HTTP); // ServiceType.HTTP should be HTTPServer
if (tryAccess != null) {
DataFormatType format = tryAccess.getDataFormatType();
// these are the file types we can read
if ((DataFormatType.BUFR == format)
|| (DataFormatType.GINI == format)
|| (DataFormatType.GRIB1 == format)
|| (DataFormatType.GRIB2 == format)
|| (DataFormatType.HDF5 == format)
|| (DataFormatType.NCML == format)
|| (DataFormatType.NETCDF == format)
|| (DataFormatType.NEXRAD2 == format)
|| (DataFormatType.NIDS == format)) access = tryAccess;
}
}
// ADDE
if (access == null) access = findAccessByServiceType(accessList, ServiceType.ADDE);
// RESOLVER
if (access == null) {
access = findAccessByServiceType(accessList, ServiceType.RESOLVER);
}
return access;
}
private InvAccess chooseImageAccess(List<InvAccess> accessList) {
InvAccess access;
access = findAccessByDataFormatType(accessList, DataFormatType.JPEG);
if (access != null) return access;
access = findAccessByDataFormatType(accessList, DataFormatType.GIF);
if (access != null) return access;
access = findAccessByDataFormatType(accessList, DataFormatType.TIFF);
if (access != null) return access;
access = findAccessByServiceType(accessList, ServiceType.ADDE);
if (access != null) {
String datasetLocation = access.getStandardUrlName();
if (datasetLocation.indexOf("image") > 0) return access;
}
return access;
}
/**
* Open a FeatureDataset from an InvAccess object.
*
* @param access use this InvAccess.
* @param task may be null
* @return ThreddsDataFactory.Result check fatalError for validity
* @throws IOException on read error
*/
public ThreddsDataFactory.Result openFeatureDataset(
InvAccess access, ucar.nc2.util.CancelTask task) throws IOException {
InvDataset invDataset = access.getDataset();
ThreddsDataFactory.Result result = new Result();
if (invDataset.getDataType() == null) {
result.errLog.format("InvDatasert must specify a FeatureType%n");
result.fatalError = true;
return result;
}
return openFeatureDataset(invDataset.getDataType(), access, task, result);
}
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 findAccessByDataFormatType(List<InvAccess> accessList, DataFormatType type) {
for (InvAccess a : accessList) {
if (type.toString().equalsIgnoreCase(a.getDataFormatType().toString())) return a;
}
return null;
}
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;
}
public ThreddsDataFactory.Result openFeatureDataset(
FeatureType wantFeatureType,
InvDataset invDataset,
ucar.nc2.util.CancelTask task,
Result result)
throws IOException {
result.featureType = invDataset.getDataType();
if (result.featureType == null) result.featureType = wantFeatureType;
// look for remote FeatureDataset
if ((result.featureType != null) && result.featureType.isPointFeatureType()) {
InvAccess access = findAccessByServiceType(invDataset.getAccess(), ServiceType.CdmrFeature);
if (access != null) return openFeatureDataset(result.featureType, access, task, result);
}
// special handling for images
if (result.featureType == FeatureType.IMAGE) {
InvAccess access = getImageAccess(invDataset, task, result);
if (access != null) {
return openFeatureDataset(result.featureType, access, task, result);
} else result.fatalError = true;
return result;
}
// special handling for DQC
InvAccess qc = invDataset.getAccess(ServiceType.QC);
if (qc != null) {
String dqc_location = qc.getStandardUrlName();
if (result.featureType == FeatureType.STATION) {
/* DqcFactory dqcFactory = new DqcFactory(true);
QueryCapability dqc = dqcFactory.readXML(dqc_location);
if (dqc.hasFatalError()) {
result.errLog.append(dqc.getErrorMessages());
result.fatalError = true;
} */
result.featureDataset =
null; // LOOK FIX ucar.nc2.thredds.DqcStationObsDataset.factory(invDataset,
// dqc_location, result.errLog);
result.fatalError = (result.featureDataset == null);
} else {
result.errLog.format("DQC must be station DQC, dataset = %s %n", invDataset.getName());
result.fatalError = true;
}
return result;
}
NetcdfDataset ncd = openDataset(invDataset, true, task, result.errLog);
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;
}