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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.internal.util;
21  
22  import org.slf4j.Logger;
23  import org.slf4j.LoggerFactory;
24  
25  import javax.faces.component.UIComponent;
26  import javax.faces.context.FacesContext;
27  import javax.faces.el.ValueBinding;
28  
29  
30  public class ComponentAttributeUtils {
31  
32    private static final Logger LOG = LoggerFactory.getLogger(ComponentAttributeUtils.class);
33  
34    public static void setBooleanProperty(UIComponent component, String name, String value) {
35      if (value != null) {
36        if (isValueReference(value)) {
37          component.setValueBinding(name, createValueBinding(value));
38        } else {
39          component.getAttributes().put(name, Boolean.valueOf(value));
40        }
41      }
42    }
43  
44    public static void setStringProperty(UIComponent component, String name, String value) {
45      if (value != null) {
46        if (isValueReference(value)) {
47          component.setValueBinding(name, createValueBinding(value));
48        } else {
49          component.getAttributes().put(name, value);
50        }
51      }
52    }
53  
54    public static boolean isValueReference(String value) {
55  
56        int start = value.indexOf("#{");
57        if (start < 0) {
58          return false;
59        }
60        int end = value.lastIndexOf('}');
61        return (end >=0 && start < end);
62    }
63  
64    public static ValueBinding createValueBinding(String value) {
65      return FacesContext.getCurrentInstance().getApplication().createValueBinding(value);
66    }
67  
68  }