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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *   http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing,
13   * software distributed under the License is distributed on an
14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   * KIND, either express or implied.  See the License for the
16   * specific language governing permissions and limitations
17   * under the License.
18   */
19  
20  package org.apache.myfaces.tobago.util;
21  
22  import org.apache.myfaces.tobago.context.ClientProperties;
23  
24  import javax.faces.application.Application;
25  import javax.faces.context.FacesContext;
26  import javax.faces.el.ValueBinding;
27  import javax.faces.el.VariableResolver;
28  
29  /**
30   * @deprecated Please use VariableResolverUtils
31   */
32  @Deprecated
33  public final class VariableResolverUtil {
34  
35    private VariableResolverUtil() {
36      // utils class
37    }
38  
39    /**
40     * Returns the requested object configured in the faces-config or from library.
41     */
42    public static Object resolveVariable(final FacesContext context, final String variable) {
43      final Application application = context.getApplication();
44      final VariableResolver variableResolver = application.getVariableResolver();
45      return variableResolver.resolveVariable(context, variable);
46    }
47  
48    /**
49     * Returns the ClientProperties object configured in the faces-config.
50     */
51    public static ClientProperties resolveClientProperties(final FacesContext facesContext) {
52      return (ClientProperties) resolveVariable(facesContext, ClientProperties.MANAGED_BEAN_NAME);
53    }
54    
55    /**
56     * Clears the value of the variable.
57     * Useful for cleaning up e.g. a session or application variable
58     * to save memory without the knowledge of the scope.
59     * Also useful to enforce a new creation of a managed-bean.
60     */
61    public static void clearVariable(final FacesContext context, final String variable) {
62      final Application application = context.getApplication();
63      final ValueBinding valueBinding = application.createValueBinding("#{" + variable + "}");
64      valueBinding.setValue(context, null);
65    }
66  }