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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.wcs2.server.ops;
//~--- non-JDK imports --------------------------------------------------------
import java.util.HashSet;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import petascope.ConfigManager;
import petascope.wcps.server.core.CellDomainElement;
import petascope.wcps.server.core.DbMetadataSource;
import petascope.wcps.server.core.DomainElement;
import petascope.wcps.server.core.Metadata;
import petascope.wcps.server.core.RangeElement;
import petascope.wcs.server.exceptions.WCSException;
//~--- JDK imports ------------------------------------------------------------
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import petascope.wcps.server.core.SDU;
import petascope.wcs.server.exceptions.InvalidParameterValueException;
import petascope.wcs.server.exceptions.InvalidServiceConfigurationException;
import petascope.wcs.server.exceptions.NoApplicableCodeException;
/**
* Describe Coverage operation for WCS 2.0
*
* @author Andrei Aiordachioaie
*/
public class DescribeCoverage implements WcsOperation {
public static String DATATYPE_URN_PREFIX = "urn:ogc:def:dataType:OGC:1.1:";
private static Logger LOG = LoggerFactory.getLogger(DescribeCoverage.class);
/* Template XMLs for response types */
private String DescribeCoverageResponse;
/* Other useful stuff */
private String coverageDescriptionTemplate;
private String listOfFormats;
private String low, high, axisLabels;
private DbMetadataSource meta;
private String rangeComponentTemplate;
private String rangeComponents, gridDimension, gridId;
public DescribeCoverage(DbMetadataSource metadata) throws InvalidServiceConfigurationException {
meta = metadata;
DescribeCoverageResponse = ConfigManager.WCS2_DESCRIBE_COVERAGE_TEMPLATE;
if (DescribeCoverageResponse == null) {
throw new InvalidServiceConfigurationException("Could not find template file.");
}
listOfFormats = "application/xml";
/* Find the CoverageDescription template string */
String starttag = "<wcs:CoverageDescription ", endtag = "</wcs:CoverageDescription>";
int start = DescribeCoverageResponse.indexOf(starttag);
int end = DescribeCoverageResponse.indexOf(endtag);
coverageDescriptionTemplate = DescribeCoverageResponse.substring(start, end + endtag.length());
String newResponse = DescribeCoverageResponse.substring(0, start - 1) + DescribeCoverageResponse.substring(end + endtag.length());
DescribeCoverageResponse = newResponse;
/* Find the RangeComponent template string */
starttag = "<gmlwcs:rangeField";
endtag = "</gmlwcs:rangeField>";
start = coverageDescriptionTemplate.indexOf(starttag);
end = coverageDescriptionTemplate.indexOf(endtag);
rangeComponentTemplate = coverageDescriptionTemplate.substring(start, end + endtag.length());
String newTemplate = coverageDescriptionTemplate.substring(0, start - 1) + coverageDescriptionTemplate.substring(end + endtag.length());
coverageDescriptionTemplate = newTemplate;
}
@Override
public String execute(String stringXml) throws WCSException {
String output;
String desc = "";
String listOfCoverageDescriptions = "";
int start, end;
start = stringXml.indexOf("gml:id=\"");
while (start != -1) {
end = stringXml.substring(start + 8).indexOf("\"");
String coverageId = stringXml.substring(start + 8, start + 8 + end);
stringXml = stringXml.substring(start + 8 + end + 1);
start = stringXml.indexOf("gml:id=\"");
// Describe "coverageId"
if (meta.existsCoverageName(coverageId)) {
Metadata cov = null;
// Read in coverage metadata
try {
cov = meta.read(coverageId);
} catch (Exception e) {
e.printStackTrace();
throw new NoApplicableCodeException("Metadata for coverage '" + coverageId + "' is not valid.");
}
// Analyze the grid components and their values
Iterator<DomainElement> it = cov.getDomainIterator();
Iterator<CellDomainElement> it2 = cov.getCellDomainIterator();
low = "";
high = "";
axisLabels = "";
while (it.hasNext() && it2.hasNext()) {
DomainElement dom = it.next();
CellDomainElement cell = it2.next();
axisLabels += dom.getName() + " ";
low += cell.getLo() + " ";
high += cell.getHi() + " ";
}
// Build the range components data structure
Iterator<RangeElement> it3 = cov.getRangeIterator();
Iterator<String> nilIterator = cov.getNullSetIterator();
rangeComponents = "";
int i = -1;
while (it3.hasNext()) {
String component = rangeComponentTemplate;
RangeElement range = it3.next();
i++;
String rangeId = "range-" + cov.getCoverageId() + "-" + range.getName();
component = component.replaceAll("\\{rangeFieldId\\}", rangeId);
component = component.replaceAll("\\{fieldName\\}", range.getName());
component = component.replaceAll("\\{datatype\\}", DATATYPE_URN_PREFIX + range.getType());
// Compute the null values for this range field
Set<String> nullVals = new HashSet<String>();
Iterator<String> it4 = cov.getNullSetIterator();
while (it4.hasNext()) {
List<String> nilVal = SDU.str2string(it4.next());
nullVals.add(nilVal.get(i));
}
StringBuffer nullValsString = new StringBuffer();
it4 = nullVals.iterator();
while (it4.hasNext()) {
nullValsString.append(" " + it4.next());
}
component = component.replaceAll("\\{nilValues\\}", nullValsString.toString().substring(1));
// And add this range field to the range structure
rangeComponents += component;
}
desc = coverageDescriptionTemplate.replaceAll("\\{coverageId\\}", coverageId);
gridId = "grid" + coverageId;
desc = desc.replaceAll("\\{gridId\\}", gridId);
gridDimension = String.valueOf(cov.getDimension());
desc = desc.replaceAll("\\{gridDimension\\}", gridDimension);
desc = desc.replaceAll("\\{low\\}", low);
desc = desc.replaceAll("\\{high\\}", high);
desc = desc.replaceAll("\\{axisLabels\\}", axisLabels);
desc = desc.replaceAll("\\{rangeFields\\}", rangeComponents);
desc = desc.replaceAll("\\{rangeStructureId\\}", "rangeStructure-" + coverageId);
desc = desc.replaceAll("\\{supportedFormats\\}", listOfFormats);
listOfCoverageDescriptions += desc;
} else {
throw new InvalidParameterValueException("gml:id");
}
}
output = DescribeCoverageResponse.replaceAll("\\{listOfCoverageDescriptions\\}",
listOfCoverageDescriptions);
output = output.replaceAll("\\{wcsSchemaUrl\\}", ConfigManager.WCS2_SCHEMA_URL);
return output;
}
}
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