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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.facelets;
21  
22  import org.apache.myfaces.tobago.component.Attributes;
23  import org.apache.myfaces.tobago.internal.util.FacesContextUtils;
24  import org.apache.myfaces.tobago.internal.util.StringUtils;
25  
26  import javax.el.ELException;
27  import javax.faces.component.UIComponent;
28  import javax.faces.view.facelets.ComponentHandler;
29  import javax.faces.view.facelets.FaceletContext;
30  import javax.faces.view.facelets.TagAttribute;
31  import javax.faces.view.facelets.TagConfig;
32  import javax.faces.view.facelets.TagHandler;
33  
34  public class ScriptHandler extends TagHandler {
35  
36    public ScriptHandler(final TagConfig config) {
37      super(config);
38  
39      this.file = getAttribute(Attributes.file.getName());
40    }
41  
42    private final TagAttribute file;
43  
44    @Override
45    public void apply(final FaceletContext faceletContext, final UIComponent parent) throws ELException {
46  
47      if (ComponentHandler.isNew(parent)) {
48  
49        // file
50        if (file != null) {
51          final String value = file.getValue(faceletContext);
52          if (StringUtils.isNotBlank(value)) {
53            FacesContextUtils.addScriptFile(faceletContext.getFacesContext(), value);
54          }
55        }
56  
57      }
58    }
59  }