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https://issues.apache.org/jira/browse/VELOCITY-618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12637299#action_12637299
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Byron Foster commented on VELOCITY-618:
---------------------------------------
The problem that comes up in strict mode is if you have a situation in a
template where something looks like a variable such as 'abc$xyz'. Since this
wouldn't be a defined variable, an exception would be thrown. I think the
developer needs an easy way to escape these character sequences like 'abc\$xyz,
and I think it would be a shame to burden strict mode with something like
'abc${DOL}xyz' :)
While this is a change in behavior, I don't think it is very dramatic, and it
does act just like non strict mode for defined variables. in strict mode:
$abc = <exception>
\$abc = $abc
\\$abc = <exception>
\\\$abc = \$abc
I bet money that when Velocity throws an exception on an unintended variable
pattern, the first thing a developer will try is to throw a back slash in front
of it. I would be surprised if someone cried fowl over it not being consistent
with their understanding of the Velocity escaping rules. I have used Velocity
on and off for years, and when this issue came up I still had to go to the docs
to understand what the behavior is.. and still :) Anyway.. that's my case,
let me know if you'd like to see a change to this.
> Strict property and method references
> -------------------------------------
>
> Key: VELOCITY-618
> URL: https://issues.apache.org/jira/browse/VELOCITY-618
> Project: Velocity
> Issue Type: Improvement
> Components: Engine
> Reporter: Byron Foster
> Fix For: 1.5.1, 1.6
>
> Attachments: MacroAndVarEscape.patch,
> strictPropertyAndVariable_3.patch
>
>
> The given patch against trunk adds a new option 'runtime.references.strict'.
> When set to true, invalid property references will throw a
> InvalidMethodException. For example $foo.bar will throw an exception if the
> object contained in $foo has no such property as bar. Any kind of reference
> to bar will cause an exception including:
> #if(#foo.bar)
> #set($foo.bar = "junk")
> #set($foo.getBar())
> etc...
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