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 * Sun designates this particular file as subject to the "Classpath" exception
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package com.sun.enterprise.deployment.node.runtime.connector;

import java.util.Map;
import org.w3c.dom.Node;
import org.w3c.dom.Element;

import com.sun.enterprise.deployment.node.XMLElement;
import com.sun.enterprise.deployment.node.runtime.RuntimeDescriptorNode;
import com.sun.enterprise.deployment.runtime.connector.MapElement;
import com.sun.enterprise.deployment.runtime.connector.Principal;
import com.sun.enterprise.deployment.xml.RuntimeTagNames;

/**
 * This node handles the role-map runtime deployment descriptors 
 *
 * @author  Jerome Dochez
 * @version 
 */
public class MapElementNode extends RuntimeDescriptorNode {
    
    public MapElementNode() {
        registerElementHandler(new XMLElement(RuntimeTagNames.PRINCIPAL), 
                               PrincipalNode.class); 
        registerElementHandler(new XMLElement(RuntimeTagNames.BACKEND_PRINCIPAL), 
                               PrincipalNode.class);			       
    }
    
    
    /**
     * Adds  a new DOL descriptor instance to the descriptor instance associated with 
     * this XMLNode
     *
     * @param descriptor the new descriptor
     */
    public void addDescriptor(Object newDescriptor) {
	MapElement descriptor = (MapElement) getDescriptor();
	if (descriptor==null) {
	    throw new RuntimeException("Cannot set info on null descriptor");
	}
	if (newDescriptor instanceof Principal) {
	    Principal principal = (Principal) newDescriptor;
	    if (principal.getValue(Principal.CREDENTIAL)==null) {
		descriptor.addPrincipal(principal);
	    } else {
		descriptor.setBackendPrincipal(true);
		descriptor.setAttributeValue(MapElement.BACKEND_PRINCIPAL, Principal.USER_NAME, principal.getValue(Principal.USER_NAME));
		descriptor.setAttributeValue(MapElement.BACKEND_PRINCIPAL, Principal.PASSWORD, principal.getValue(Principal.PASSWORD));
		descriptor.setAttributeValue(MapElement.BACKEND_PRINCIPAL, Principal.CREDENTIAL, principal.getValue(Principal.CREDENTIAL));
		
	    }
	}
    }
    
    /**
     * write the descriptor class to a DOM tree and return it
     *
     * @param parent node for the DOM tree
     * @param node name for the descriptor
     * @param the descriptor to write
     * @return the DOM tree top node
     */    
    public Node writeDescriptor(Node parent, String nodeName, MapElement descriptor) {
	Node mapElementNode = super.writeDescriptor(parent, nodeName, descriptor);
	PrincipalNode pn = new PrincipalNode();
	Principal[] principals = descriptor.getPrincipal();
	for (int i=0;i<principals.length;i++) {
	    pn.writeDescriptor(mapElementNode, RuntimeTagNames.PRINCIPAL, principals[i]);
	}
	// backend-principal
	if (descriptor.isBackendPrincipal()) {
	    Element backend = (Element) appendChild(mapElementNode, RuntimeTagNames.BACKEND_PRINCIPAL);
	    setAttribute(backend, RuntimeTagNames.USER_NAME, 
	    	(String) descriptor.getAttributeValue(MapElement.BACKEND_PRINCIPAL, Principal.USER_NAME));
	    setAttribute(backend, RuntimeTagNames.PASSWORD, 
	    	(String) descriptor.getAttributeValue(MapElement.BACKEND_PRINCIPAL, Principal.PASSWORD));
	    setAttribute(backend, RuntimeTagNames.CREDENTIAL, 
	    	(String) descriptor.getAttributeValue(MapElement.BACKEND_PRINCIPAL, Principal.CREDENTIAL));
	}
		
	return mapElementNode;
    }
}