UseStringIsEmptyRule complains when checking String[].length

[ilyakharlamov]

Steps to reproduce:

/*
 */
package com.mycompany.app;
/**
 * Hello world!
 * @since 1.0
 */
@SuppressWarnings("PMD.UseUtilityClass")
public final class App {
    /**
     * Ctor.
     */
    private App() { }

    /**
     * Main.
     * @param args Arguments
     */
    public static void main(final String... args) {
        if (args.length > 0) {
            System.out.println("args are not empty");
        }
    }
}

run mvn clean install -Pqulice

What's wrong:
PMD: src/main/java/com/mycompany/app/App.java[20-20]: Use String.isEmpty() when checking for empty string (UseStringIsEmptyRule)

We check an array of Strings but not a String.
There is no string length check at all in this code.
There is no such thing as String[].isEmpty() either.
We check String[].length but not String.length() here.

Expected result:
The rule should complain on String but should not complain on String[].

[0crat]

@krzyk/z please, pay attention to this issue

[0crat]

@ilyakharlamov/z this project will fix the problem faster if you donate a few dollars to it; just click here and pay via Stripe, it's very fast, convenient and appreciated; thanks a lot!

[krzyk]

@0crat in

[0crat]

@0crat in (here)

@krzyk Job #1031 is now in scope, role is DEV

[0crat]

Bug was reported, see §29: +15 point(s) just awarded to @ilyakharlamov/z

[0crat]

@krzyk/z everybody who has role DEV is banned at #1031; I won't be able to assign anyone automatically; consider assigning someone manually (as in §19), or invite more people (as in §51), or remove the job from the scope (as in §14)

[0crat]

@krzyk/z everybody who has role DEV is banned at #1031; I won't be able to assign anyone automatically; consider assigning someone manually (as in §19), or invite more people (as in §51), or remove the job from the scope (as in §14)

[0crat]

@krzyk/z everybody who has role DEV is banned at #1031; I won't be able to assign anyone automatically; consider assigning someone manually (as in §19), or invite more people (as in §51), or remove the job from the scope (as in §14)

[0crat]

@krzyk/z everybody who has role DEV is banned at #1031; I won't be able to assign anyone automatically; consider assigning someone manually (as in §19), or invite more people (as in §51), or remove the job from the scope (as in §14)

[0crat]

@krzyk/z everybody who has role DEV is banned at #1031; I won't be able to assign anyone automatically; consider assigning someone manually (as in §19), or invite more people (as in §51), or remove the job from the scope (as in §14)

[0crat]

@krzyk/z everybody who has role DEV is banned at #1031; I won't be able to assign anyone automatically; consider assigning someone manually (as in §19), or invite more people (as in §51), or remove the job from the scope (as in §14)

[0crat]

@krzyk/z everybody who has role DEV is banned at #1031; I won't be able to assign anyone automatically; consider assigning someone manually (as in §19), or invite more people (as in §51), or remove the job from the scope (as in §14)

[0crat]

@krzyk/z everybody who has role DEV is banned at #1031; I won't be able to assign anyone automatically; consider assigning someone manually (as in §19), or invite more people (as in §51), or remove the job from the scope (as in §14)

[0crat]

@krzyk/z everybody who has role DEV is banned at #1031; I won't be able to assign anyone automatically; consider assigning someone manually (as in §19), or invite more people (as in §51), or remove the job from the scope (as in §14)

[zCRUSADERz]

@krzyk assign me, please.

[krzyk]

@0crat assign @zCRUSADERz

[0crat]

@0crat assign @zCRUSADERz (here)

@krzyk The job #1031 assigned to @zCRUSADERz/z, here is why; the budget is 30 minutes, see §4; please, read §8 and §9; if the task is not clear, read this and this; @zCRUSADERz/z is not a member of this project yet, but they can request to join, as §1 explains; there will be no monetary reward for this job

[0crat]

Manual assignment of issues is discouraged, see §19: -5 point(s) just awarded to @krzyk/z

[zCRUSADERz]

@ilyakharlamov merged, please close

[zCRUSADERz]

@0crat wait for closure

[0crat]

@0crat wait for closure (here)

@zCRUSADERz The impediment for #1031 was registered successfully by @zCRUSADERz/z

[0crat]

@0crat wait for closure (here)

@zCRUSADERz Job #1031 is not in the agenda of @zCRUSADERz/z, can't set impediment

[zCRUSADERz]

@ilyakharlamov issue fixed, please close.

[ilyakharlamov]

@zCRUSADERz Thanks, closed

[0crat]

Job #1031 is not in the agenda of @zCRUSADERz/z, can't retrieve data and time of add

[0crat]

The job #1031 is now out of scope

[0crat]

Order was finished: +30 point(s) just awarded to @zCRUSADERz/z