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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  package org.apache.myfaces.commons.facelets.util;
20  
21  import javax.faces.component.UIComponent;
22  import javax.faces.context.FacesContext;
23  
24  public final class FaceletsFunctionLibrary
25  {
26  
27      public FaceletsFunctionLibrary()
28      {
29          super();
30      }
31  
32      public static UIComponent findComponent(String expr)
33      {
34          return FacesContext.getCurrentInstance().
35              getViewRoot().findComponent(expr);
36      }
37      
38      public static String outputClientId(String expr)
39      {
40          FacesContext ctx = FacesContext.getCurrentInstance();
41          return ctx.getViewRoot().findComponent(expr).getClientId(ctx);
42      }
43      
44      public static UIComponent findComponentFrom(UIComponent c, String expr)
45      {
46          if (c != null)
47          {
48              return c.findComponent(expr);
49          }
50          return null;
51      }
52  }