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Article:
  Custom PMD Rules
Subject:   PMD CUSTOM XPATH RULE
Date:   2005-02-24 01:18:45
From:   PravinD
I am attempting to create a couple of PMD rules.


1) To create a rule that checks for the occurences of String objects and throws a warning if the names of the objects do not start with the letters 'str'


2) To create a rule that checks for open connection objects and throws a warning if these objects remain unclosed.


Can someone help me on this or post the xpath rule for the same?

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  • PMD CUSTOM XPATH RULE
    2005-02-24 06:09:36  tcopeland [View]

    Hi PravinD -

    Cool, OK, let's see:

    > occurences of String objects and throws a
    > warning if the names of the objects do not
    > start with the letters 'str'

    Hm. The XPath rule below will catch field declarations of Strings that don't start with "str":

    //FieldDeclaration
    [
    Type/Name[@Image='String']
    and not(starts-with(VariableDeclarator/VariableDeclaratorId/@Image, 'str'))
    ]

    and you can write similar ones for parameters and local variable declarations.


    > checks for open connection objects and
    > throws a warning if these objects remain
    > unclosed.

    Check out the CloseConnection rule here:

    http://pmd.sourceforge.net/rules/design.html

    Yours,

    Tom