| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.myfaces.tobago.util; |
| |
| import javax.el.ELContext; |
| import javax.faces.context.FacesContext; |
| |
| public final class VariableResolverUtils { |
| |
| private VariableResolverUtils() { |
| // utils class |
| } |
| |
| /** |
| * Returns the requested object configured in the faces-config or from library. |
| */ |
| public static Object resolveVariable(final FacesContext context, final String variable) { |
| final ELContext elContext = context.getELContext(); |
| return elContext.getELResolver().getValue(elContext, null, variable); |
| } |
| |
| /** |
| * Clears the value of the variable. |
| * Useful for cleaning up e.g. a session or application variable |
| * to save memory without the knowledge of the scope. |
| * Also useful to enforce a new creation of a managed-bean. |
| */ |
| public static void clearVariable(final FacesContext context, final String variable) { |
| final ELContext elContext = context.getELContext(); |
| elContext.getELResolver().setValue(elContext, null, variable, null); |
| } |
| } |