com.sun.faces.lifecycle.ClientWindowImpl Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of jakarta.faces Show documentation
EE4J Compatible Implementation for Jakarta Faces API
The newest version!
/*
 * Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package com.sun.faces.lifecycle;

import static com.sun.faces.context.SessionMap.getMutex;
import static com.sun.faces.renderkit.RenderKitUtils.PredefinedPostbackParameter.CLIENT_WINDOW_PARAM;

import java.util.Map;
import java.util.UUID;

import jakarta.faces.component.UINamingContainer;
import jakarta.faces.context.ExternalContext;
import jakarta.faces.context.FacesContext;
import jakarta.faces.lifecycle.ClientWindow;
import jakarta.faces.render.ResponseStateManager;

public class ClientWindowImpl extends ClientWindow {

    String id;

    public ClientWindowImpl() {
    }

    @Override
    public Map getQueryURLParameters(FacesContext context) {
        return null;
    }

    @Override
    public void decode(FacesContext context) {
        Map requestParamMap = context.getExternalContext().getRequestParameterMap();
        if (isClientWindowRenderModeEnabled(context)) {
            id = requestParamMap.get(ResponseStateManager.CLIENT_WINDOW_URL_PARAM);
        }
        // The hidden field always takes precedence, if present.
        String paramName = CLIENT_WINDOW_PARAM.getName(context);
        if (requestParamMap.containsKey(paramName)) {
            id = requestParamMap.get(paramName);
        }
        if (null == id) {
            id = calculateClientWindow(context);
        }
    }

    private String calculateClientWindow(FacesContext context) {
        synchronized (getMutex(context.getExternalContext().getSession(true))) {
            final String clientWindowCounterKey = "com.sun.faces.lifecycle.ClientWindowCounterKey";
            ExternalContext extContext = context.getExternalContext();
            Map sessionAttrs = extContext.getSessionMap();
            Integer counter = (Integer) sessionAttrs.get(clientWindowCounterKey);
            if (null == counter) {
                counter = Integer.valueOf(0);
            }
            char sep = UINamingContainer.getSeparatorChar(context);
            id = UUID.randomUUID().toString() + sep + +counter;

            sessionAttrs.put(clientWindowCounterKey, ++counter);
        }
        return id;
    }

    @Override
    public String getId() {
        return id;
    }
}