1 files changed, 178 insertions, 0 deletions
diff --git a/projects/net.wotonomy.web/src/main/java/net/wotonomy/web/WOParentElement.java b/projects/net.wotonomy.web/src/main/java/net/wotonomy/web/WOParentElement.java
new file mode 100644
index 0000000..40ee618
--- /dev/null
+++ b/projects/net.wotonomy.web/src/main/java/net/wotonomy/web/WOParentElement.java
@@ -0,0 +1,178 @@
+/*
+Wotonomy: OpenStep design patterns for pure Java applications.
+Copyright (C) 2000 Blacksmith, Inc.
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, see http://www.gnu.org
+*/
+
+package net.wotonomy.web;
+
+import java.util.Iterator;
+import java.util.List;
+
+import net.wotonomy.foundation.NSMutableArray;
+
+/**
+* This class represents a parent node in an element tree.
+* It has no content in itself, and exists only to forward
+* messages to each of its children, in turn.
+* Package access only, as it is not in the specification.
+*
+* @author michael@mpowers.net
+* @author $Author: cgruber $
+* @version $Revision: 905 $
+*/
+class WOParentElement extends WOElement
+{
+	NSMutableArray children;
+
+	/**
+	* Default constructor.  
+	*/
+	public WOParentElement()
+	{
+		children = new NSMutableArray();
+	}
+	
+	/**
+	* Returns an element with the specified children.
+	*/
+	public WOParentElement( List childElements )
+	{
+		this();
+		children.addAll( childElements );
+	}
+	
+    /**
+    * Package access only.  Called to initialize the component with 
+    * the proper context before the start of the request-response cycle.
+    * If the context has a current component, that component becomes
+    * this component's parent.
+    */
+    void ensureAwakeInContext (WOContext aContext)
+    {
+        WOElement element;
+    	Iterator it = children.iterator();
+	    while ( it.hasNext() )
+	    {
+            element = (WOElement) it.next();
+            aContext.pushElement( element );
+	    	element.ensureAwakeInContext( aContext );
+            aContext.popElement();
+	    }
+    }
+
+	/**
+	* Forwards this message to all child elements.
+	*/
+    public void takeValuesFromRequest (
+    	WORequest aRequest, WOContext aContext)
+    {
+    	WOElement element;
+	    
+//        aContext.incrementLastElementIDComponent();
+        aContext.appendZeroElementIDComponent();
+        
+    	Iterator it = children.iterator();
+	    while ( it.hasNext() )
+	    {
+            element = (WOElement) it.next();
+            aContext.pushElement( element );
+            aContext.incrementLastElementIDComponent();
+	    	element.takeValuesFromRequest( aRequest, aContext );
+            aContext.popElement();
+	    }
+        
+        aContext.deleteLastElementIDComponent();
+    }
+
+    /**
+	* Forwards this message to all child elements,
+	* returning the first non-null result.
+    */
+    public WOActionResults invokeAction (
+    	WORequest aRequest, WOContext aContext)
+    {
+    	WOElement element;
+	    
+//        aContext.incrementLastElementIDComponent();
+        aContext.appendZeroElementIDComponent();
+
+    	WOActionResults result = null;
+    	Iterator it = children.iterator();
+	    while ( it.hasNext() )
+	    {
+	    	element = (WOElement) it.next();
+            aContext.pushElement( element );
+            aContext.incrementLastElementIDComponent();
+	    	result = element.invokeAction( aRequest, aContext );
+            aContext.popElement();
+		    if ( result != null ) break;
+	    }
+        
+        aContext.deleteLastElementIDComponent();
+	    return result;
+    }
+    
+    /**
+	* Forwards this message to all child elements.
+    */
+    public void appendToResponse (WOResponse aResponse, WOContext aContext)
+    {
+    	WOElement element;
+	    
+//        aContext.incrementLastElementIDComponent();
+        aContext.appendZeroElementIDComponent();
+        
+	    // for each child element
+    	Iterator it = children.iterator();
+	    while ( it.hasNext() )
+	    {
+	    	element = (WOElement) it.next();
+            aContext.pushElement( element );
+            aContext.incrementLastElementIDComponent();
+
+		    // forward the message
+	    	element.appendToResponse( 
+		    	aResponse, aContext );
+                
+            aContext.popElement();
+
+	    }
+        aContext.deleteLastElementIDComponent();
+    }
+    
+    public WOResponse generateResponse() 
+    {
+        WOResponse r = new WOResponse();
+        return r;
+    }
+    
+    public String toString()
+    {
+        StringBuffer result = new StringBuffer();
+        result.append( "[WOParentElement: " );
+	    // for each child element
+    	Iterator it = children.iterator();
+	    while ( it.hasNext() )
+	    {
+            result.append( "[ " );
+            result.append( it.next().toString() );
+            result.append( " ]" );
+	    }
+        result.append( " ]" );
+        return result.toString();
+    }
+    
+}