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//
// ========================================================================
// Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.webapp;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.eclipse.jetty.xml.XmlParser;
/**
* IterativeDescriptorProcessor
*
*
*/
public abstract class IterativeDescriptorProcessor implements DescriptorProcessor
{
public static final Class<?>[] __signature = new Class[]{WebAppContext.class, Descriptor.class, XmlParser.Node.class};
protected Map<String, Method> _visitors = new HashMap<String, Method>();
public abstract void start(WebAppContext context, Descriptor descriptor);
public abstract void end(WebAppContext context, Descriptor descriptor);
/**
* Register a method to be called back when visiting the node with the given name.
* The method must exist on a subclass of this class, and must have the signature:
* public void method (Descriptor descriptor, XmlParser.Node node)
* @param nodeName
* @param m
*/
public void registerVisitor(String nodeName, Method m)
{
_visitors.put(nodeName, m);
}
/**
* {@inheritDoc}
*/
public void process(WebAppContext context, Descriptor descriptor)
throws Exception
{
if (descriptor == null)
return;
start(context,descriptor);
XmlParser.Node root = descriptor.getRoot();
Iterator<?> iter = root.iterator();
XmlParser.Node node = null;
while (iter.hasNext())
{
Object o = iter.next();
if (!(o instanceof XmlParser.Node)) continue;
node = (XmlParser.Node) o;
visit(context, descriptor, node);
}
end(context,descriptor);
}
protected void visit (WebAppContext context, Descriptor descriptor, XmlParser.Node node)
throws Exception
{
String name = node.getTag();
Method m = _visitors.get(name);
if (m != null)
m.invoke(this, new Object[]{context, descriptor, node});
}
}
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