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ZK Spring Integration Security Library

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/* WebAppInit.java

{{IS_NOTE
	Purpose:
		
	Description:
		
	History:
		Jan 16, 2009 2:57:10 PM, Created by henrichen
}}IS_NOTE

Copyright (C) 2009 Potix Corporation. All Rights Reserved.

{{IS_RIGHT
	This program is distributed under GPL Version 2.0 in the hope that
	it will be useful, but WITHOUT ANY WARRANTY.
}}IS_RIGHT
*/

package org.zkoss.spring.init;

import javax.servlet.ServletContext;

import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import org.zkoss.lang.Library;
import org.zkoss.spring.security.config.ZkBeanIds;
import org.zkoss.spring.security.config.ZkSecurityContextListener;
import org.zkoss.spring.security.intercept.zkevent.ZkEventProcessListener;
import org.zkoss.spring.security.ui.ZkExceptionTranslationListener;
import org.zkoss.zk.ui.WebApp;
import org.zkoss.zk.ui.util.Configuration;

/**
 * Adds ZK Spring Security listeners and register security related variable resolver. 
 * @author henrichen
 * @see metainfo/zk/config.xml
 * @since 3.0
 */
public class SecurityWebAppInit implements org.zkoss.zk.ui.util.WebAppInit {
	private static String RESOLVER_CLASS = org.zkoss.spring.DelegatingVariableResolver.RESOLVER_CLASS;
	private static String SECURITY_RESOLVER = "org.zkoss.spring.init.SecurityVariableResolver";
	public void init(WebApp wapp) throws Exception {
		final Configuration conf = wapp.getConfiguration();
		
		final ConfigurableApplicationContext ctx = (ConfigurableApplicationContext) 
			WebApplicationContextUtils.getRequiredWebApplicationContext((ServletContext)wapp.getNativeContext());
		
		//add listener for ZK + Security
		if (ctx.containsBeanDefinition(ZkBeanIds.ZK_DESKTOP_REUSE_FILTER)) {
			conf.addListener(ZkSecurityContextListener.class);
			conf.addListener(ZkExceptionTranslationListener.class);
			conf.addListener(ZkEventProcessListener.class);
		}
		
		String classes = Library.getProperty(RESOLVER_CLASS);
		if (classes == null) {
			Library.setProperty(RESOLVER_CLASS, SECURITY_RESOLVER);
		} else {
			Library.setProperty(RESOLVER_CLASS, classes + ","+ SECURITY_RESOLVER);
		}
	}
}