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package de.mhus.lib.portlet.actions;

import java.util.HashMap;

import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;

import de.mhus.lib.core.IProperties;
import de.mhus.lib.portlet.IllegalCharacterException;

/**
 * ActionRequestHandler class.
 *
 * @author mikehummel
 * @version $Id: $Id
 */
public class ActionRequestHandler implements Action {

	private HashMap registry = new HashMap();
	
	/** {@inheritDoc} */
	@Override
	public boolean processAction(String path, ActionRequest request, ActionResponse response)
			throws Exception {

		if (path == null) return false;
		
		String name = null;
		int p = path.indexOf('/');
		if (p > 0) {
			name = path.substring(0,p);
			path = path.substring(p+1);
		} else {
			name = path;
			path = null;
		}
		Action resource = null;
		synchronized (registry) {
			resource = registry.get(name);
		}
		if (resource == null) return false;
		
		return resource.processAction(path, request, response);
	}
	
	/**
	 * register.
	 *
	 * @param name a {@link java.lang.String} object.
	 * @param resource a {@link de.mhus.lib.portlet.actions.Action} object.
	 */
	public void register(String name, Action resource) {
		if (name == null || name.indexOf('/') >= 0) throw new IllegalCharacterException('/',name);
		synchronized (registry) {
			registry.put(name, resource);
		}
	}
	
	/**
	 * unregister.
	 *
	 * @param name a {@link java.lang.String} object.
	 */
	public void unregister(String name) {
		synchronized (registry) {
			registry.remove(name);
		}
	}

	/**
	 * processAction.
	 *
	 * @param request a {@link javax.portlet.ActionRequest} object.
	 * @param response a {@link javax.portlet.ActionResponse} object.
	 * @return a boolean.
	 * @throws java.lang.Exception if any.
	 */
	public boolean processAction(ActionRequest request, ActionResponse response)
			throws Exception {
		String action = request.getParameter(ActionRequest.ACTION_NAME);
		if (action != null) {
			return processAction(action,request,response);
		}
		return false;
	}

	/** {@inheritDoc} */
	@Override
	public synchronized IProperties createProperties(ActionRequest request) {
		return null;
	}

}