[jira] [Resolved] (CAMEL-21180) > Simple Expression fails when OGNL replaceALL is used with regular expression of Escape Sequences

["Claus Ibsen (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CAMEL-21180?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Claus Ibsen resolved CAMEL-21180.
---------------------------------
    Resolution: Won't Fix

> > Simple Expression fails when OGNL replaceALL is used with regular expression of Escape Sequences
> --------------------------------------------------------------------------------------------------
>
>                 Key: CAMEL-21180
>                 URL: https://issues.apache.org/jira/browse/CAMEL-21180
>             Project: Camel
>          Issue Type: Bug
>          Components: camel-core
>    Affects Versions: 3.22.0
>            Reporter: Harish Annamalai
>            Priority: Major
>
> We have come across a special case when Simple Expression is used to invoke OGNL replaceAll of String method with regex. The expression evaluation fails when the replaceAll is called with a regular Expression with only Special Character such as [\\r\\n|file://r//n] .
> Examples 1:
> {{        from("timer:getter?period=1000&repeatCount=1")}}
> {{                .setBody(constant("foobar\nfoobar"))}}
> {{                .setBody(simple("$\{body.replaceAll('[o\\r\\n]','')}"))}}
> {{                .to("log://expr")}}
> {{                .end();}}
> {{Output:}}
> {{[ timer://getter] expr                                     : Exchange[ExchangePattern: InOnly, BodyType: String, Body: fbarfbar]}}
> {{Here the replaceAll works correctly.}}
> However, in Example 2:
> {{        from("timer:getter?period=1000&repeatCount=1")}}
> {{                .setBody(constant("foobar\nfoobar"))}}
> {{                .setBody(simple("$\{body.replaceAll('[\\r\\n|file://r//n]','')}"))}}
> {{                .to("log://onlyspecial")}}
> {{                .end();}}
> {{The Example 2 fails with expression:}}
> {{Caused by: java.lang.IllegalArgumentException: name must be specified and not empty}}
> We find it strange because when the replaceAll Simple expression itself creates a new line in case of [\\r\\n|file://r//n] while it handles it correctly if the expression is \\r
> n.
> using a valid regular expression [\\r\\n|file://r//n] fails, while `\r\n' works correctly.
> We are using Camel 3.x and we have used bodyOneLine as an alternative. However, the OGNL expression seems to behave weirdly when it is used within Square Brackets , for example [\\t|file://t/] also fails in $\{body.replaceAll('[\\t|file://t/]','')}
> It appears simple expression parser is unable to handle only Escape Sequences, even [o\\t] works.



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