All Downloads are FREE. Search and download functionalities are using the official Maven repository.

javax.faces.component.StateHolderSaver Maven / Gradle / Ivy

Go to download

This is the master POM file for Oracle's Implementation of the JSF 2.3 Specification.

There is a newer version: 2.3-pfd
Show newest version
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2012 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package javax.faces.component;

import javax.faces.context.FacesContext;
import javax.faces.component.StateHolder;
import javax.faces.component.UIComponent;
import java.io.Serializable;

/**
 * 

Helper class for saving and restoring attached objects.

*/ class StateHolderSaver implements Serializable { private static final long serialVersionUID = 6470180891722042701L; private String className = null; private Serializable savedState = null; public static final String DYNAMIC_COMPONENT = "com.sun.faces.DynamicComponent"; private enum StateHolderTupleIndices { StateHolderSaverInstance, ComponentAddedDynamically, LastMember }; public boolean componentAddedDynamically() { boolean result = false; // if the Object to save implemented Serializable but not // StateHolder if (null == className && null != savedState) { return result; } // if the Object to save did not implement Serializable or // StateHolder if (className == null) { return result; } // else the object to save did implement StateHolder if (null != savedState) { // don't need to check transient, since that was done on // the saving side. Serializable [] tuple = (Serializable []) savedState; result = (Boolean) tuple[StateHolderTupleIndices.ComponentAddedDynamically.ordinal()]; } return result; } public StateHolderSaver(FacesContext context, Object toSave) { className = toSave.getClass().getName(); if (toSave instanceof StateHolder) { // do not save an attached object that is marked transient. if (!((StateHolder) toSave).isTransient()) { Serializable [] tuple = new Serializable[StateHolderTupleIndices.LastMember.ordinal()]; tuple[StateHolderTupleIndices.StateHolderSaverInstance.ordinal()] = (Serializable) ((StateHolder) toSave).saveState(context); if (toSave instanceof UIComponent) { tuple[StateHolderTupleIndices.ComponentAddedDynamically.ordinal()] = ((UIComponent)toSave).getAttributes().containsKey(DYNAMIC_COMPONENT) ? Boolean.TRUE : Boolean.FALSE; } savedState = tuple; } else { className = null; } } else if (toSave instanceof Serializable) { savedState = (Serializable) toSave; className = null; } } /** * * @return the restored {@link StateHolder} instance. */ public Object restore(FacesContext context) throws IllegalStateException { Object result = null; Class toRestoreClass; // if the Object to save implemented Serializable but not // StateHolder if (null == className && null != savedState) { return savedState; } // if the Object to save did not implement Serializable or // StateHolder if (className == null) { return null; } // else the object to save did implement StateHolder try { toRestoreClass = loadClass(className, this); } catch (ClassNotFoundException e) { throw new IllegalStateException(e); } if (null != toRestoreClass) { try { result = toRestoreClass.newInstance(); } catch (InstantiationException e) { throw new IllegalStateException(e); } catch (IllegalAccessException a) { throw new IllegalStateException(a); } } if (null != result && null != savedState && result instanceof StateHolder) { // don't need to check transient, since that was done on // the saving side. Serializable [] tuple = (Serializable []) savedState; ((StateHolder) result).restoreState(context, tuple[StateHolderTupleIndices.StateHolderSaverInstance.ordinal()]); } return result; } private static Class loadClass(String name, Object fallbackClass) throws ClassNotFoundException { ClassLoader loader = Thread.currentThread().getContextClassLoader(); if (loader == null) { loader = fallbackClass.getClass().getClassLoader(); } return Class.forName(name, false, loader); } }




© 2015 - 2024 Weber Informatics LLC | Privacy Policy