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package scala.xml ;
import scala.xml.javaAdapter.Map ;
import scala.xml.javaAdapter.HashMap ;
/** a Scala specific dtd2scala.FactoryAdapter, which plays the SAX content handler for the SAX parser
* It implements the three callback methods elementContainsText, createElement and createPCDATA.
* DTDs imported with the dtd2scala tool all use this class as interface to the SAX XML parser, by
* giving concrete values for the factory maps f and g.
*/
abstract class ScalaFactoryAdapter
extends dtd2scala.FactoryAdapter() {
def iterToList[ a ]( iter:java.util.Iterator ):List[a] =
if( !iter.hasNext() )
Nil
else
(iter.next().asInstanceOf[a])::iterToList( iter ) ;
def mapToMap[a,b]( map:java.util.Map ):Map[a,b] = {
val keys:java.util.Iterator = map.keySet().iterator();
val res = new HashMap[a,b] ;
def iterToMap:Unit =
if( keys.hasNext() ) {
val key = keys.next();
val value = map.get( key ).asInstanceOf[b] ;
res.put( key.asInstanceOf[a] , value.asInstanceOf[b] );
iterToMap
} else
() ;
iterToMap;
res
}
/** a mapping from a element name (string) to an element constructor (constr:Seq[Element] => Element)
*/
val f: Map[ String, Seq[Element] => Element ];
/** a mapping from an element name (string) to a truth value indicating whether text (PCDATA) may appear as
*/
val g: Map[ String, boolean ] ;
val compress: boolean ;
def elementContainsText( name:java.lang.String ):boolean =
g.get( name ) ;
// if compress is set, used for hash-consing
val cache = new HashMap();
def createElement(elemName:String,
attribs:java.util.Map,
children:java.util.Iterator ):scala.Object = {
val _children = iterToList[Element]( children ); // 2do:optimize
if( !compress ) {
val c = f.get( elemName ); // get constructor
val el = c( _children );
el.setAttribs( mapToMap[String,String]( attribs ) );
el
} else { // do hash-consing
val h = Element.hashValue( elemName, attribs, _children );
val el_cache = cache.get( h.asInstanceOf[scala.All] ).asInstanceOf[scala.Object];
if ( el_cache != null ) { // return cached elem
el_cache
} else {
val c = f.get( elemName ); // get constructor
val el = c( _children );
el.setAttribs( mapToMap[String,String]( attribs ) );
cache.put( h.asInstanceOf[scala.All], el.asInstanceOf[scala.All] );
el
}
}
}
def createPCDATA( text:String ):scala.Object = {
new PCDATA( text );
};
} // ScalaFactoryAdapter
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