Support 2 pass symbol replacement
---------------------------------
Key: SHALE-201
URL: http://issues.apache.org/struts/browse/SHALE-201
Project: Shale
Type: Improvement
Components: Clay
Versions: Nightly
Environment: Linux, Windows
Reporter: Ryan Wynn
The following illustrates a use case for 2 pass symbol replacement.
Client.html
<span id="id1" jsfid="clay" clayJsfid="Template.html" name="#{person.name}"
email="#{person.address.email"} />
Template.html
<body>
Name: <span id="id2" jsfid="tree" value="@name"/>
Email: <span id="id3" jsfid="tree" value="@email"/>
</body>
Custom component
<component jsfid="tree" extends="panelGroup">
<element renderId="1" jsfid="outputText">
<attributes>
<set name="value" value="@value"/>
</attributes>
</element>
<validator jsfid="lengthValidator">
...
</validator>
</component>
Currently the nested attribute [value] inside of the 1st child of tree does not
realize symbol replacement because the symbol
@value actually points to another symbol, either @name or @email depending on
the context.
With 2-pass symbol replacement this attribute would ultimately get the value
#{person.name} or #{person.address.email}
Span (id1) - > clay
Symbol Table = { @name=#{person.name} , @email==#{person.address.email}
}
Span (id2) -> tree
Symbol Table = { @name=#{person.name} , @email==#{person.address.email}
, @[EMAIL PROTECTED]
tree Child 1
Symbol Table = { @name=#{person.name} , @email==#{person.address.email}
, @[EMAIL PROTECTED]
Such that EvalSymbol(@value) -> EvalSymbol(@name) ->
#{person.name} , instead of @name
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