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Mismatched query and update of collection

Reports collections whose contents are either queried and not updated, or updated and not queried.

Such inconsistent queries and updates are pointless and may indicate either dead code or a typo.

Use the inspection settings to specify name patterns that correspond to update/query methods. Query methods that return an element are automatically detected, and only those that write data to an output parameter (for example, an OutputStream) need to be specified.

Example:

Suppose you have your custom FixedStack class with method store():

public class FixedStack<T> extends Collection<T> { public T store(T t) { // implementation } }

You can add store to the update methods table in order to report mismatched queries like:

void test(int i) { FixedStack<Integer> stack = new FixedStack<>(); stack.store(i); }

Inspection options

Here you can find the description of settings available for the Mismatched query and update of collection inspection, and the reference of their default values.

Ignored classes (including subclasses)

Empty

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin:

Java, 241.16690

Last modified: 29 April 2024