1 /**
   2  * .
   3  * Copyright � 1999 Erich P G.
   4  *
   5  */
   6  
   7 package creator.compiler;
   8 
   9 //import org.xml.sax.EntityResolver; 
  10 import org.xml.sax.InputSource;
  11 import org.xml.sax.SAXException;
  12 import java.io.StringReader;
  13 import java.util.Vector;
  14 import com.sun.xml.parser.Resolver;
  15 
  16 /**
  17  * Implement our own resolver to handle XML activities.  
  18  * For the most part, this is used to provide DTDs.
  19  * 
  20  * Do NOT use the default constructor!
  21  *
  22  * @author Erich P. Gatejen
  23  * @version 1.0
  24  * <i>Version History</i>
  25  * <code>EPG - Initial - 12Jan99</code> 
  26  * 
  27  */
  28 public class XmlCompilerResolver extends Resolver {
  29 	
  30 	// --- FINAL FIELDS ------------------------------------------------------	
  31 
  32 	// --- FIELDS ------------------------------------------------------------
  33 
  34     /**
  35      *  The DTD to use when parsing the Sim text.
  36      */      	
  37     private String     myDTD;  
  38 
  39     /**
  40      *  The entity to trap.
  41      */      	
  42     private String     myURI;  
  43     
  44 	// --- PUBLIC METHODS ----------------------------------------------------	
  45 
  46     /**
  47      *  Constructor.  Set up the input source.  We will pass to this
  48      * a string containing the DTD.
  49      *
  50      *  @param uri A string containing the textual entity to trap and resolve.
  51      *  @param dtdText A string containing the DTD.
  52      */
  53      XmlCompilerResolver(String uri, String   dtdText) {
  54  
  55         super();
  56         
  57         myDTD       = dtdText;
  58         myURI       = uri;
  59     }
  60 
  61     /**
  62      *  overrides the resolver.
  63      *
  64      *  @param name not implimented.
  65      *  @param uri Passed to this from the parser.  We will trap
  66      *                  the uri.
  67      *  @return an input source to be used by the XML parser.
  68      */
  69     public InputSource resolveEntity (java.lang.String name, 
  70                                       java.lang.String uri)   
  71                                      throws SAXException, java.io.IOException {
  72 
  73 //DEBUG
  74 //System.out.println("Resolve Entity: public=[" + name + "] system=[" + uri + "]");
  75 
  76 
  77             // Is it asking for the SIM.DTD?
  78             if (uri.equals(myURI)) {
  79                 
  80                 // return a reader for the dtdText
  81                 return new InputSource(new StringReader(myDTD));
  82                 
  83             } else {
  84 
  85                 // use the default behaviour
  86                 return new InputSource(new StringReader(myDTD));            
  87             
  88             }
  89 
  90     }
  91 
  92                          
  93     
  94 	// --- PRIVATE METHODS ---------------------------------------------------	
  95 }