api change

1 files changed, 42 insertions, 0 deletions

diff --git a/sources/scala/xml/nobinding/NoBindingFactoryAdapter.scala b/sources/scala/xml/nobinding/NoBindingFactoryAdapter.scala
new file mode 100644
index 0000000000..4abb765b13
--- /dev/null
+++ b/sources/scala/xml/nobinding/NoBindingFactoryAdapter.scala
@@ -0,0 +1,42 @@
+package scala.xml.nobinding;
+
+import java.net.URL;
+import scala.collection.mutable.HashMap ;
+import scala.xml.{Node,Text,FactoryAdapter} ;
+
+/** nobinding adaptor providing callbacks to parser to create elements.
+*   implements hash-consing
+*/
+class NoBindingFactoryAdapter extends FactoryAdapter  {
+
+    def nodeContainsText( label:java.lang.String ):boolean = true;
+
+    /* default behaviour is hash-consing */
+    val cache = new HashMap[Element,Element];
+
+    def createNode( label: String,
+                    attrs: HashMap[String,String],
+                    children: List[Node] ):Element = {
+
+          val el = new Element( Symbol( label ), children ) {
+            override val attribHashCode = attrs.toList.hashCode(); /*set eagerly*/
+	    override def attributes = attrs;
+          };
+
+	  cache.get( el ).match{
+	    case Some(cachedElem) =>
+	      System.err.println("[using cached elem +"+cachedElem.toXML+" instead of "+el.toXML+"!]");
+	      cachedElem
+	    case None =>
+	      cache.update( el, el );
+	      el
+	  }
+    }
+
+    def createText( text:String ) = Text( text );
+
+    override def loadXML( url:URL ):Element = loadXML( url.getFile() );
+
+    override def loadXML( filename:String ):Element =
+      super.loadXML( filename ).asInstanceOf[ Element ]
+  }