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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.wcs.server;
//~--- non-JDK imports --------------------------------------------------------
import javax.servlet.ServletException;
import net.opengis.ows.v_1_0_0.ExceptionReport;
import net.opengis.wcs.v_1_1_0.Capabilities;
import net.opengis.wcs.v_1_1_0.CoverageDescriptions;
import net.opengis.wcs.v_1_1_0.DescribeCoverage;
import net.opengis.wcs.v_1_1_0.GetCapabilities;
import net.opengis.wcs.v_1_1_0.GetCoverage;
import petascope.wcps.server.core.DbMetadataSource;
import petascope.wcps.server.core.WCPS;
import petascope.wcps.server.exceptions.WCPSException;
import petascope.wcs.server.exceptions.WCSException;
import petascope.wcs.server.core.convertGetCoverage;
import petascope.wcs.server.core.executeDescribeCoverage;
import petascope.wcs.server.core.executeGetCapabilities;
import petascope.ConfigManager;
import petascope.PetascopeXmlNamespaceMapper;
//~--- JDK imports ------------------------------------------------------------
import java.io.StringReader;
import java.io.StringWriter;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.stream.XMLOutputFactory;
import javax.xml.stream.XMLStreamWriter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import petascope.wcs.server.exceptions.InternalComponentException;
import petascope.wcs.server.exceptions.XmlStructuresException;
/**
* The Web Coverage Service (WcsServer)
* This class provides methods for each of the WCS operations:
* - GetCapabilities
* - DescribeCoverage
* - GetCoverage
*
* @author Andrei Aiordachioaie
*/
public class WcsServer {
private static Logger LOG = LoggerFactory.getLogger(WcsServer.class);
/* Status variable */
private static Boolean ok;
private static Boolean printLog;
/* Globals */
private static Boolean printOutput;
private DbMetadataSource meta;
/**
* Public minimal constructor
* @param settingsPath path to the "settings.properties" file
*/
public WcsServer(String settingsPath, DbMetadataSource source) throws ServletException {
ConfigManager.getInstance(settingsPath, null);
meta = source;
ok = true;
}
/**
* WcsServer GetCapabilities operation
*/
public String GetCapabilities(String stringXml) throws WCSException {
String output = "Default output. ";
try {
// read the input XML
LOG.trace("Reading the input XML file ... ");
JAXBContext context = JAXBContext.newInstance("net.opengis.wcs.v_1_1_0");
Unmarshaller unmarshaller = context.createUnmarshaller();
Object xml = unmarshaller.unmarshal(new StringReader(stringXml));
// Find out which class to execute ...
LOG.trace("It is a " + xml.getClass().getSimpleName() + " request.");
LOG.trace("Compiling data into XML format for GetCapabilities ... ");
GetCapabilities input = (GetCapabilities) xml;
Capabilities cap = new executeGetCapabilities(input, meta).get();
// Write the output
LOG.trace("MArshalling with context: " + cap.getClass().getPackage().getName());
final StringWriter writer = new StringWriter();
try {
context = JAXBContext.newInstance(cap.getClass());
final XMLStreamWriter xmlStreamWriter = XMLOutputFactory.newInstance().createXMLStreamWriter(writer);
final Marshaller marshaller = context.createMarshaller();
marshaller.setProperty("com.sun.xml.bind.namespacePrefixMapper", new PetascopeXmlNamespaceMapper());
marshaller.setProperty("jaxb.formatted.output", true);
marshaller.setProperty("jaxb.schemaLocation", "http://www.opengis.net/wcs/1.1 http://schemas.opengis.net/wcs/1.1.0/wcsGetCapabilities.xsd "
+ "http://www.opengis.net/wcs/1.1/ows http://schemas.opengis.net/wcs/1.1.0/owsGetCapabilities.xsd");
marshaller.marshal(cap, xmlStreamWriter);
} catch (final Exception e) {
throw new RuntimeException(e.getMessage(), e);
}
output = writer.toString();
LOG.trace("Done! User has the GetCapabilities result !");
} catch (javax.xml.bind.JAXBException ex) {
throw new XmlStructuresException("Could not marshall/unmarshall XML structures.", ex);
}
LOG.trace("---------------------OUTPUT--------------------------");
LOG.trace(output);
LOG.trace("-----------------------------------------------------");
return output;
}
/**
* WcsServer GetCoverage operation
*/
public String GetCoverage(String stringXml, WCPS wcps) throws WCSException {
String output = "Default output. ";
try {
// read the input XML
LOG.trace("Reading the input XML file ... ");
JAXBContext context = JAXBContext.newInstance("net.opengis.wcs.v_1_1_0");
Unmarshaller unmarshaller = context.createUnmarshaller();
Object xml = unmarshaller.unmarshal(new StringReader(stringXml));
LOG.trace("It is a " + xml.getClass().getSimpleName() + " request.");
// Convert the WcsServer into WCPS
LOG.trace("Converting to WCPS request ... please wait");
GetCoverage wcs = (GetCoverage) xml;
output = new convertGetCoverage(wcs, meta).get();
LOG.trace("Done! User has his WCPS request !");
} catch (JAXBException ex) {
throw new XmlStructuresException("Could not marshall/unmarshall XML structures.", ex);
} catch (WCPSException e) {
throw new InternalComponentException(e.getMessage(), e);
}
LOG.trace("---------------------OUTPUT--------------------------");
LOG.trace(output);
LOG.trace("-----------------------------------------------------");
return output;
}
/**
* WcsServer DescribeCoverage operation
*/
public String DescribeCoverage(String stringXml) throws WCSException {
String output = "Default output. ";
try {
// read the input XML
LOG.trace("Reading the input XML file ... ");
JAXBContext context = JAXBContext.newInstance("net.opengis.wcs.v_1_1_0");
Unmarshaller unmarshaller = context.createUnmarshaller();
Object xml = unmarshaller.unmarshal(new StringReader(stringXml));
LOG.trace("It is a " + xml.getClass().getSimpleName() + " request.");
LOG.trace("Querying the WCPS architecture for the details on this coverage ...");
DescribeCoverage input = (DescribeCoverage) xml;
CoverageDescriptions covs = new executeDescribeCoverage(input, meta).get();
// Write the output file
LOG.trace("Marshalling with context: " + covs.getClass().getPackage().getName());
final StringWriter writer = new StringWriter();
try {
context = JAXBContext.newInstance(covs.getClass());
final XMLStreamWriter xmlStreamWriter = XMLOutputFactory.newInstance().createXMLStreamWriter(writer);
final Marshaller marshaller = context.createMarshaller();
marshaller.setProperty("com.sun.xml.bind.namespacePrefixMapper", new PetascopeXmlNamespaceMapper());
marshaller.setProperty("jaxb.formatted.output", true);
marshaller.setProperty("jaxb.schemaLocation", "http://www.opengis.net/wcs/1.1 http://schemas.opengis.net/wcs/1.1.0/wcsDescribeCoverage.xsd "
+ "http://www.opengis.net/wcs/1.1/ows http://schemas.opengis.net/wcs/1.1.0/owcsAll.xsd");
marshaller.marshal(covs, xmlStreamWriter);
} catch (final Exception e) {
throw new RuntimeException(e.getMessage(), e);
}
output = writer.toString();
LOG.trace("Done! User has the DescribeCoverage result !");
} catch (JAXBException ex) {
throw new XmlStructuresException("Could not marshall/unmarshall XML structures.", ex);
}
LOG.trace("---------------------OUTPUT--------------------------");
LOG.trace(output);
LOG.trace("-----------------------------------------------------");
return output;
}
private String exceptionReportToXml(ExceptionReport report) {
String output = null;
try {
javax.xml.bind.JAXBContext jaxbCtx = javax.xml.bind.JAXBContext.newInstance(
report.getClass().getPackage().getName());
javax.xml.bind.Marshaller marshaller = jaxbCtx.createMarshaller();
marshaller.setProperty(javax.xml.bind.Marshaller.JAXB_ENCODING, "UTF-8");
marshaller.setProperty(javax.xml.bind.Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
marshaller.marshal(report, System.err);
StringWriter strWriter = new StringWriter();
marshaller.marshal(report, strWriter);
output = strWriter.toString();
ok = true;
LOG.trace("Done marshalling Error Report.");
} catch (Exception e2) {
LOG.error("Error marshalling Exception Report.");
LOG.error("Stack trace: " + e2);
}
return output;
}
}
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