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/*
* This file is part of rasdaman community.
*
* Rasdaman community is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Rasdaman community is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with rasdaman community. If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
rasdaman GmbH.
*
* For more information please see <http://www.rasdaman.org>
* or contact Peter Baumann via <baumann@rasdaman.com>.
*/
package petascope.wcps.server.core;
import petascope.wcps.server.exceptions.ResourceException;
import petascope.wcps.server.exceptions.InvalidWcpsRequestException;
import petascope.wcps.server.exceptions.InvalidMetadataException;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
/**
* A IMetadataSource that allows WCPS to store information about on-the-fly
* constructed coverages (for example Construct Coverage expr).
* Needs another MetadataSource as a backend, to retrieve metadata about
* static coverages.
*/
public class DynamicMetadataSource implements IDynamicMetadataSource {
// Static coverages, served by the server at all times
private Set<String> staticCoverageNames;
// Dynamic coverages, built on-the-fly in a query
private Set<String> dynamicCoverageNames;
// Union of static and dynamic coverages
private Set<String> allCoverageNames;
// Metadata information for all available coverages
private Map<String, Metadata> metadata;
// Other metadata class that serves as backend
private IMetadataSource metadataSource;
public DynamicMetadataSource(IMetadataSource metadataSource)
throws ResourceException, InvalidMetadataException {
this.metadataSource = metadataSource;
staticCoverageNames = metadataSource.coverages();
dynamicCoverageNames = new HashSet<String>();
allCoverageNames = staticCoverageNames;
metadata = new HashMap<String, Metadata>();
// Init metadata for static coverages
Iterator<String> i = staticCoverageNames.iterator();
try {
while (i.hasNext()) {
String coverage = i.next();
metadata.put(coverage, metadataSource.read(coverage));
}
} catch (InvalidWcpsRequestException ire) {
throw (InvalidMetadataException) ire.getCause();
}
}
public Set<String> coverages() throws ResourceException {
return metadataSource.coverages();
}
public String formatToMimetype(String format) {
return metadataSource.formatToMimetype(format);
}
public Metadata read(String coverageName) throws InvalidWcpsRequestException, ResourceException {
if ((coverageName == null) || coverageName.equals("")) {
throw new InvalidWcpsRequestException(
"Cannot retrieve coverage with null or empty name");
}
if (!this.coverages().contains(coverageName)) {
throw new InvalidWcpsRequestException("Coverage '" + coverageName
+ "' is not served by this server");
}
return metadataSource.read(coverageName);
}
public void addDynamicMetadata(String coverageName, Metadata meta) {
metadata.put(coverageName, meta);
dynamicCoverageNames.add(coverageName);
allCoverageNames = staticCoverageNames;
allCoverageNames.addAll(dynamicCoverageNames);
}
public Collection<String> getAxisNames() {
return metadataSource.getAxisNames();
}
}
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