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1 files changed, 277 insertions, 0 deletions

diff --git a/src/wcs/server/servlet/WCS.java b/src/wcs/server/servlet/WCS.java
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+++ b/src/wcs/server/servlet/WCS.java
@@ -0,0 +1,277 @@
+package wcs.server.servlet;
+
+import wcs.server.core.*;
+import java.io.StringReader;
+import java.io.StringWriter;
+import javax.xml.bind.JAXBContext;
+import javax.xml.bind.Unmarshaller;
+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;
+
+/**
+ * The Web Coverage Service (WCS)
+ * This class provides methods for each of the WCS operations:
+ * - GetCapabilities
+ * - DescribeCoverage
+ * - GetCoverage
+ *
+ * @author Andrei Aiordachioaie
+ */
+public class WCS {
+
+    private static Boolean ok;
+    private static Boolean printOutput;
+    private static Boolean printLog;
+	private static String metaDbPath;
+
+    /**
+     * Public minimal constructor
+	 * @param metadataDbPath path to the "dbparams.properties" file
+     */
+    public WCS(String metadataDbPath)
+    {
+        printLog = true;
+        printOutput = true;
+        ok = true;
+		metaDbPath = metadataDbPath;
+    }
+
+    /**
+     * Record a log message
+     * @param msg Text of the message
+     */
+    public static void log(String msg)
+    {
+        if (printLog)
+            System.err.println(msg);
+    }
+
+    /**
+     * WCS GetCapabilities operation
+     */
+    public String GetCapabilities(String stringXml)
+    {
+        String output = "Default output. ";
+        String errmsg = "No error. ";
+        ok = false;
+
+        try
+        {
+            // read the input XML
+             log(">>> 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(">>> It is a " + xml.getClass().getSimpleName() + " request.");
+
+             log(">>> Compiling data into XML format for GetCapabilities ... ");
+             GetCapabilities input = (GetCapabilities) xml;
+             Capabilities cap = new executeGetCapabilities(input,metaDbPath).get();
+
+            // Write the output
+            javax.xml.bind.JAXBContext jaxbCtx = javax.xml.bind.JAXBContext.newInstance(cap.getClass().getPackage().getName());
+            javax.xml.bind.Marshaller marshaller = jaxbCtx.createMarshaller();
+            marshaller.setProperty(javax.xml.bind.Marshaller.JAXB_ENCODING, "UTF-8"); //NOI18N
+            marshaller.setProperty(javax.xml.bind.Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
+            StringWriter strWriter = new StringWriter();
+            marshaller.marshal(cap, strWriter);
+            output = strWriter.toString();
+            log(">>> Done! User has the GetCapabilities result !");
+            ok = true;
+
+
+        }
+        catch (javax.xml.bind.JAXBException ex) {
+                 java.util.logging.Logger.getLogger("global").log(java.util.logging.Level.SEVERE, null, ex); //NOI18N
+                 ex.printStackTrace();
+                 errmsg = ex.toString();
+                 log("ERROR 1 ");
+             }
+        catch (WCSException e)
+        {
+            log("*** GOT WCS EXCEPTION !");
+            ExceptionReport report = e.getReport();
+            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"); //NOI18N
+                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("Done with the Error Report !");
+            }
+            catch (Exception e2)
+            {
+                    e2.printStackTrace();
+                    errmsg = e2.toString();
+                    log("ERROR 2");
+            }
+        }
+        catch (Exception e)
+        {
+            e.printStackTrace();
+            errmsg = e.toString();
+            log("ERROR 3");
+        }
+
+        if (ok == false)
+            output = errmsg;
+        if (printOutput)
+            System.out.println("*****************\nOUTPUT IS \n" + output);
+        
+        return output;
+    }
+
+    /**
+     * WCS GetCoverage operation
+     */
+    public String GetCoverage(String stringXml)
+    {
+        String output = "Default output. ";
+        String errmsg = "No error. ";
+        ok = false;
+
+        try
+        {
+            // read the input XML
+             log(">>> 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(">>> It is a " + xml.getClass().getSimpleName() + " request.");
+
+             //Convert the WCS into WCPS
+             log(">>> Converting to WCPS ... please wait");
+             GetCoverage wcs = (GetCoverage) xml;
+             ProcessCoverage wcps = new convertGetCoverage(wcs, metaDbPath).get();
+             // Write the output WCPS request
+            log(">>> Writing the WCPS XML request ...");
+            javax.xml.bind.JAXBContext jaxbCtx = javax.xml.bind.JAXBContext.newInstance(wcps.getClass().getPackage().getName());
+            javax.xml.bind.Marshaller marshaller = jaxbCtx.createMarshaller();
+            marshaller.setProperty(javax.xml.bind.Marshaller.JAXB_ENCODING, "UTF-8"); //NOI18N
+            marshaller.setProperty(javax.xml.bind.Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
+            StringWriter strWriter = new StringWriter();
+            marshaller.marshal(wcps, strWriter);
+            output = strWriter.toString();
+            log(">>> Done! User has his WCPS request !");
+            ok = true;
+        }
+        catch (WCSException e)
+        {
+            ExceptionReport report = e.getReport();
+            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"); //NOI18N
+                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("Done with the Error Report !");
+            }
+            catch (Exception e2)
+            {
+                    e2.printStackTrace();
+                    errmsg = e2.toString();
+                    log("ERROR 4");
+            }
+        }
+        catch (Exception e)
+        {
+            e.printStackTrace();
+            errmsg = e.toString();
+            log("ERROR 5");
+        }
+
+        if (ok == false)
+            output = errmsg;
+        if (printOutput)
+            System.out.println("*****************\nOUTPUT IS \n" + output);
+
+        return output;
+    }
+
+    /**
+     * WCS DescribeCoverage operation
+     */
+    public String DescribeCoverage(String stringXml)
+    {
+        String output = "Default output. ";
+        String errmsg = "No error. ";
+        ok = false;
+
+        try
+        {
+            // read the input XML
+             log(">>> 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(">>> It is a " + xml.getClass().getSimpleName() + " request.");
+
+             log(">>> Querying the WCPS architecture for the details on this coverage ...");
+             DescribeCoverage input = (DescribeCoverage) xml;
+             CoverageDescriptions covs = new executeDescribeCoverage(input, metaDbPath).get();
+
+             // Write the output file
+             javax.xml.bind.JAXBContext jaxbCtx = javax.xml.bind.JAXBContext.newInstance(covs.getClass().getPackage().getName());
+             javax.xml.bind.Marshaller marshaller = jaxbCtx.createMarshaller();
+             marshaller.setProperty(javax.xml.bind.Marshaller.JAXB_ENCODING, "UTF-8"); //NOI18N
+             marshaller.setProperty(javax.xml.bind.Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
+             StringWriter strWriter = new StringWriter();
+             marshaller.marshal(covs, strWriter);
+             output = strWriter.toString();
+             log(">>> Done! User has the DescribeCoverage result !");
+             ok = true;
+        }
+        catch (WCSException e)
+        {
+            ExceptionReport report = e.getReport();
+            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"); //NOI18N
+                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("Done with the Error Report !");
+            }
+            catch (Exception e2)
+            {
+                    e2.printStackTrace();
+                    errmsg = e2.toString();
+                    log("ERROR 6");
+            }
+        }
+        catch (Exception e)
+        {
+            e.printStackTrace();
+            errmsg = e.toString();
+            log("ERROR 7");
+        }
+
+
+        if (ok == false)
+            output = errmsg;
+        if (printOutput)
+            System.out.println("*****************\nOUTPUT IS \n" + output);
+
+        return output;
+    }
+
+}