src/org/biojava/dasobert/das/DAS_StylesheetRetrieve.java

   1 /*
   2  *                  BioJava development code
   3  *
   4  * This code may be freely distributed and modified under the
   5  * terms of the GNU Lesser General Public Licence.  This should
   6  * be distributed with the code.  If you do not have a copy,
   7  * see:
   8  *
   9  *      http://www.gnu.org/copyleft/lesser.html
  10  *
  11  * Copyright for this code is held jointly by the individual
  12  * authors.  These should be listed in @author doc comments.
  13  *
  14  * For more information on the BioJava project and its aims,
  15  * or to join the biojava-l mailing list, visit the home page
  16  * at:
  17  *
  18  *      http://www.biojava.org/
  19  *
  20  * Created on Aug 3, 2005
  21  *
  22  */
  23 package org.biojava.dasobert.das;
  24
  25 import java.io.InputStream;
  26 import java.net.*;
  27 import java.util.*;
  28 import java.util.logging.Logger;
  29
  30 import javax.xml.parsers.ParserConfigurationException;
  31 import javax.xml.parsers.SAXParser;
  32 import javax.xml.parsers.SAXParserFactory;
  33
  34 import org.xml.sax.InputSource;
  35 import org.xml.sax.XMLReader;
  36
  37 /** this stores the stylesheet config for a DAS source.
  38  *
  39  * @author Andreas Prlic
  40  *
  41  */
  42 public class DAS_StylesheetRetrieve {
  43     static Logger logger = Logger.getLogger("org.biojava.spice");
  44     /**
  45      *
  46      */
  47     Map[] t3DMap;
  48     public DAS_StylesheetRetrieve() {
  49         super();
  50
  51     }
  52
  53     /** retrieve a StyleSheet from a URL
  54      * The style sheet is represented as a Map[],
  55      *  where each Map contains the description of how to draw a features of a particular type.
  56      *
  57      *  */
  58     public Map[] retrieve(URL dasStylesheetRequest){
  59
  60         logger.finest("requesting stylesheet from " + dasStylesheetRequest);
  61
  62         InputStream inStream = null;
  63
  64                 try {
  65                     HttpURLConnection huc = DAS_FeatureRetrieve.openHttpURLConnection(dasStylesheetRequest);
  66
  67                     logger.finest("got connection: "+huc.getResponseMessage());
  68                     //String contentEncoding = huc.getContentEncoding();
  69                     inStream = huc.getInputStream();
  70
  71
  72                     SAXParserFactory spfactory =
  73                             SAXParserFactory.newInstance();
  74
  75                         spfactory.setValidating(false);
  76
  77                     SAXParser saxParser = null ;
  78
  79                         try{
  80                             saxParser =
  81                                 spfactory.newSAXParser();
  82                         } catch (ParserConfigurationException e) {
  83                             e.printStackTrace();
  84                         }
  85
  86                         DAS_Stylesheet_Handler cont_handle = new DAS_Stylesheet_Handler() ;
  87                         XMLReader xmlreader = saxParser.getXMLReader();
  88
  89                         xmlreader.setContentHandler(cont_handle);
  90                         xmlreader.setErrorHandler(new org.xml.sax.helpers.DefaultHandler());
  91                         InputSource insource = new InputSource() ;
  92                         insource.setByteStream(inStream);
  93
  94
  95                     xmlreader.parse(insource);
  96                         Map[] typeMap = cont_handle.getTypeStyles();
  97
  98                         t3DMap = cont_handle.get3DStyles();
  99                         return typeMap;
 100
 101                 } catch (Exception e) {
 102                     logger.finest(e.getMessage());
 103                     return null;
 104                 }
 105     }
 106
 107
 108     public Map[] get3DStyle(){
 109         return t3DMap;
 110     }
 111 }