26 lines
1015 B
Markdown
26 lines
1015 B
Markdown
# Extending PMD
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Use XPath to define a new rule for PMD to prevent complex code. The rule should detect the use of three or more nested `if` statements in Java programs so it can detect patterns like the following:
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```Java
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if (...) {
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...
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if (...) {
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...
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if (...) {
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....
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}
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}
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}
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```
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Notice that the nested `if`s may not be direct children of the outer `if`s. They may be written, for example, inside a `for` loop or any other statement.
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Write below the XML definition of your rule.
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You can find more information on extending PMD in the following link: https://pmd.github.io/latest/pmd_userdocs_extending_writing_rules_intro.html, as well as help for using `pmd-designer` [here](https://gitlab2.istic.univ-rennes1.fr/VV-2025-2026/VV-ISTIC-TP2/-/blob/main/exercises/designer-help.md).
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Use your rule with different projects and describe you findings below. See the [instructions](../sujet.md) for suggestions on the projects to use.
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## Answer
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