Application: gvSIG desktop

import java.io.FileInputStream;

import java.io.IOException;

import java.nio.ByteBuffer;

import java.nio.channels.FileChannel;

import org.gvsig.remoteClient.exceptions.ServerErrorException;

import org.gvsig.remoteClient.exceptions.WCSException;

import org.gvsig.remoteClient.utils.Utilities;

    public File getCoverage(WCSStatus status) throws ServerErrorException, WCSException {

    	URL request = null;

		try

		{

			//TODO:

			//pass this buildXXXRequest to the WCSProtocolHandlerXXX: The request can depend on the WCS version.

			request = new URL(buildCoverageRequest(status));

            File f = com.iver.andami.Utilities.downloadFile(request, "wcsGetMap");            		    	

            if (Utilities.isTextFile(f)) {

	    		FileInputStream fis = new FileInputStream(f);

	    		FileChannel fc = fis.getChannel();

	    		byte[] data = new byte[(int)fc.size()];   // fc.size returns the size of the file which backs the channel

	    		ByteBuffer bb = ByteBuffer.wrap(data);

	    		fc.read(bb);

	    		WCSException wcsEx = null;

            	String exceptionMessage = parseException(data);

                if (exceptionMessage==null)

                {

                 	String error = new String(data);

                	int pos = error.indexOf("<?xml");

                	if (pos!= -1)

                	{

                		String xml = error.substring(pos,error.length());

                		exceptionMessage = parseException(xml.getBytes());

                	}               

                    if (exceptionMessage == null)

                    	exceptionMessage = new String(data);

                }

             	wcsEx = new WCSException(exceptionMessage);

            	wcsEx.setWCSMessage(new String(data));

            	// Since it is an error file, It must be deleted from the cache

            	com.iver.andami.Utilities.removeURL(request);

                throw wcsEx;

            }

			return f;	    	

		}

		catch(IOException e)

		{

			e.printStackTrace();

            throw new ServerErrorException();

		}

    } 

    private String parseException(byte[] bytes) {

		// TODO Auto-generated method stub

		return null;

	}

	/**

     * Builds the GetMapRequest according to the OGC WCS Specifications

     */

    private String buildCoverageRequest(WCSStatus status)

    { 

		StringBuffer req = new StringBuffer();

		String symbol = null;

		String onlineResource = null;

		if (status.getOnlineResource() == null)

			onlineResource = getHost();

		else 

			onlineResource = status.getOnlineResource();

		symbol = getSymbol(onlineResource);

		req.append(onlineResource + symbol + "REQUEST=GetMap&SERVICE=WCS&VERSION=").append(getVersion()).append("&");

		req.append(getPartialQuery(status));

       if (status.getExceptionFormat() != null) {

            req.append("&EXCEPTIONS=" + status.getExceptionFormat());

        } else {

            req.append("&EXCEPTIONS=XML");

        }

		return req.toString().replaceAll(" ", "%20");

     * Gets the part of the OGC request that share GetMap and GetFeatureInfo

     * @return String request

     */

    public String getPartialQuery(WCSStatus status)

    {    	

        StringBuffer req = new StringBuffer();

        req.append("COVERAGE=" + status.getCoverageName())

           .append("&SRS=" + status.getSrs())

           .append("&BBOX=" + status.getExtent().getMinX()+ "," )

           .append(status.getExtent().getMinY()+ ",")

           .append(status.getExtent().getMaxX()+ ",")

           .append(status.getExtent().getMaxY())

           .append("&WIDTH=" + status.getWidth())

           .append("&HEIGHT=" + status.getHeight())

           .append( (status.getDepth() != null) ? "&DEPTH="+status.getDepth().intValue() : "" )

           .append( (status.getTime() != null) ? "&TIME="+status.getTime() : "" )

           .append( (status.getParameters() != null) ? "&"+status.getParameters() : "");

        return req.toString();

    }

    /**

		return req.toString().replaceAll(" ", "%20");