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package javax.faces.webapp; |
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import javax.faces.component.UIComponent; |
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import javax.faces.context.FacesContext; |
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import javax.faces.el.ValueBinding; |
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import javax.servlet.jsp.JspException; |
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import javax.servlet.jsp.tagext.Tag; |
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import javax.servlet.jsp.tagext.TagSupport; |
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34 | 0 | public class AttributeTag |
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extends TagSupport |
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{ |
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private static final long serialVersionUID = 3147657100171678632L; |
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private String _name; |
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private String _value; |
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public void setName(String name) |
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{ |
47 | 0 | _name = name; |
48 | 0 | } |
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public void setValue(String value) |
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{ |
56 | 0 | _value = value; |
57 | 0 | } |
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public int doStartTag() throws JspException |
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{ |
64 | 0 | UIComponentTag componentTag = UIComponentTag.getParentUIComponentTag(pageContext); |
65 | 0 | if (componentTag == null) |
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{ |
67 | 0 | throw new JspException("no parent UIComponentTag found"); |
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} |
69 | 0 | UIComponent component = componentTag.getComponentInstance(); |
70 | 0 | if (component == null) |
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{ |
72 | 0 | throw new JspException("parent UIComponentTag has no UIComponent"); |
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} |
74 | 0 | String name = getName(); |
75 | 0 | if (component.getAttributes().get(name) == null) |
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{ |
77 | 0 | Object value = getValue(); |
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79 | 0 | if(value != null) |
80 | 0 | component.getAttributes().put(name, value); |
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} |
82 | 0 | return Tag.SKIP_BODY; |
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} |
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public void release() |
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{ |
90 | 0 | super.release(); |
91 | 0 | _name = null; |
92 | 0 | _value = null; |
93 | 0 | } |
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private String getName() |
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{ |
98 | 0 | if (UIComponentTag.isValueReference(_name)) |
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{ |
100 | 0 | FacesContext facesContext = FacesContext.getCurrentInstance(); |
101 | 0 | ValueBinding vb = facesContext.getApplication().createValueBinding(_name); |
102 | 0 | return (String)vb.getValue(facesContext); |
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} |
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105 | 0 | return _name; |
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} |
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private Object getValue() |
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{ |
110 | 0 | if (UIComponentTag.isValueReference(_value)) |
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{ |
112 | 0 | FacesContext facesContext = FacesContext.getCurrentInstance(); |
113 | 0 | ValueBinding vb = facesContext.getApplication().createValueBinding(_value); |
114 | 0 | return vb.getValue(facesContext); |
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} |
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117 | 0 | return _value; |
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} |
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} |