portletstateinterceptor.java

struts 2 核心包 的源码 有错误是难免的

// Decompiled by Jad v1.5.8e2. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://kpdus.tripod.com/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi space 
// Source File Name:   PortletStateInterceptor.java

package org.apache.struts2.portlet.interceptor;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
import com.opensymphony.xwork2.util.*;
import java.util.Map;
import javax.portlet.ActionResponse;
import javax.portlet.RenderRequest;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts2.portlet.PortletActionConstants;
import org.apache.struts2.portlet.dispatcher.DirectRenderFromEventAction;

public class PortletStateInterceptor extends AbstractInterceptor
	implements PortletActionConstants
{

	private static final Log LOG = LogFactory.getLog(org/apache/struts2/portlet/interceptor/PortletStateInterceptor);
	private static final long serialVersionUID = 0x553029a0f2f939e8L;

	public PortletStateInterceptor()
	{
	}

	public String intercept(ActionInvocation invocation)
		throws Exception
	{
		Integer phase = (Integer)invocation.getInvocationContext().get("struts.portlet.phase");
		if (RENDER_PHASE.equals(phase))
		{
			restoreStack(invocation);
			return invocation.invoke();
		}
		if (!EVENT_PHASE.equals(phase))
			break MISSING_BLOCK_LABEL_71;
		String s = invocation.invoke();
		saveStack(invocation);
		return s;
		Exception exception;
		exception;
		saveStack(invocation);
		throw exception;
		return invocation.invoke();
	}

	private void saveStack(ActionInvocation invocation)
	{
		Map session = invocation.getInvocationContext().getSession();
		session.put("struts.portlet.valueStackFromEventPhase", invocation.getStack());
		ActionResponse actionResponse = (ActionResponse)invocation.getInvocationContext().get("struts.portlet.response");
		actionResponse.setRenderParameter("struts.portlet.eventAction", "true");
	}

	private void restoreStack(ActionInvocation invocation)
	{
		RenderRequest request = (RenderRequest)invocation.getInvocationContext().get("struts.portlet.request");
		if (TextUtils.stringSet(request.getParameter("struts.portlet.eventAction")))
		{
			Map session = invocation.getInvocationContext().getSession();
			if (!isProperPrg(invocation))
			{
				LOG.debug("Restoring value stack from event phase");
				ValueStack oldStack = (ValueStack)invocation.getInvocationContext().getSession().get("struts.portlet.valueStackFromEventPhase");
				if (oldStack != null)
				{
					CompoundRoot oldRoot = oldStack.getRoot();
					ValueStack currentStack = invocation.getStack();
					CompoundRoot root = currentStack.getRoot();
					root.addAll(oldRoot);
					LOG.debug("Restored stack");
				}
			} else
			{
				LOG.debug("Won't restore stack from event phase since it's a proper PRG request");
			}
		}
	}

	private boolean isProperPrg(ActionInvocation invocation)
	{
		return !(invocation.getAction() instanceof DirectRenderFromEventAction);
	}

}