WindowSlidingGatherer.java

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package com.pivovarit.gatherers;
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import java.util.Arrays;
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import java.util.List;
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import java.util.function.BiConsumer;
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import java.util.function.Supplier;
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import java.util.stream.Gatherer;
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record WindowSlidingGatherer<T>(int windowSize, int step)
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  implements Gatherer<T, WindowSlidingGatherer.SlidingWindow, List<T>> {
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    WindowSlidingGatherer {
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        if (windowSize < 1) {
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            throw new IllegalArgumentException("'windowSize' must be greater than zero");
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        }
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        if (step < 0) {
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            throw new IllegalArgumentException("'step' must be greater than or equal to zero");
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        }
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        if (step > windowSize) {
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            throw new IllegalArgumentException("'step' must be less than or equal to 'windowSize'");
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        }
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    }
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    @Override
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    public Supplier<WindowSlidingGatherer.SlidingWindow> initializer() {
27 2 1. lambda$initializer$0 : replaced return value with null for com/pivovarit/gatherers/WindowSlidingGatherer::lambda$initializer$0 → KILLED
2. initializer : replaced return value with null for com/pivovarit/gatherers/WindowSlidingGatherer::initializer → KILLED
 
        return WindowSlidingGatherer.SlidingWindow::new;
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    }
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    @Override
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    public Integrator<WindowSlidingGatherer.SlidingWindow, T, List<T>> integrator() {
32 3 1. lambda$integrator$1 : replaced boolean return with true for com/pivovarit/gatherers/WindowSlidingGatherer::lambda$integrator$1 → SURVIVED
2. lambda$integrator$1 : replaced boolean return with false for com/pivovarit/gatherers/WindowSlidingGatherer::lambda$integrator$1 → SURVIVED
3. integrator : replaced return value with null for com/pivovarit/gatherers/WindowSlidingGatherer::integrator → KILLED
 
        return Integrator.ofGreedy((state, e, downstream) -> state.integrate(e, downstream));
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    }
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    @Override
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    public BiConsumer<WindowSlidingGatherer.SlidingWindow, Downstream<? super List<T>>> finisher() {
37 1 1. finisher : replaced return value with null for com/pivovarit/gatherers/WindowSlidingGatherer::finisher → KILLED
 
        return SlidingWindow::finish;
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    }
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    class SlidingWindow {
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        private Object[] window = new Object[windowSize];
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        private int at = 0;
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        private boolean emitted = false;
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        boolean integrate(T element, Downstream<? super List<T>> downstream) {
46 1 1. integrate : Replaced integer addition with subtraction → KILLED
 
            window[at++] = element;
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            emitted = false;
48 2 1. integrate : negated conditional → KILLED
2. integrate : changed conditional boundary → KILLED
 
            if (at < windowSize) {
49 1 1. integrate : replaced boolean return with false for com/pivovarit/gatherers/WindowSlidingGatherer$SlidingWindow::integrate → SURVIVED
 
                return true;
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            } else {
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                final var oldWindow = window;
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                final var newWindow = new Object[windowSize];
53 2 1. integrate : Replaced integer subtraction with addition → KILLED
2. integrate : removed call to java/lang/System::arraycopy → KILLED
 
                System.arraycopy(oldWindow, step, newWindow, 0, windowSize - step);
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                window = newWindow;
55 1 1. integrate : Replaced integer subtraction with addition → KILLED
 
                at -= step;
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                emitted = true;
57 2 1. integrate : replaced boolean return with true for com/pivovarit/gatherers/WindowSlidingGatherer$SlidingWindow::integrate → SURVIVED
2. integrate : replaced boolean return with false for com/pivovarit/gatherers/WindowSlidingGatherer$SlidingWindow::integrate → SURVIVED
 
                return downstream.push((List<T>) Arrays.asList(oldWindow));
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            }
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        }
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        void finish(Downstream<? super List<T>> downstream) {
62 4 1. finish : negated conditional → KILLED
2. finish : changed conditional boundary → KILLED
3. finish : negated conditional → KILLED
4. finish : negated conditional → KILLED
 
            if (!emitted && at > 0 && !downstream.isRejecting()) {
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                var lastWindow = new Object[at];
64 1 1. finish : removed call to java/lang/System::arraycopy → KILLED
 
                System.arraycopy(window, 0, lastWindow, 0, at);
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                window = null;
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                at = 0;
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                emitted = true;
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                downstream.push((List<T>) Arrays.asList(lastWindow));
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            }
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        }
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    }
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}

Mutations

27

1.1
Location : lambda$initializer$0
Killed by : com.pivovarit.gatherers.blackbox.WindowSlidingTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.WindowSlidingTest]/[method:shouldWindowSlidingEmpty()] replaced return value with null for com/pivovarit/gatherers/WindowSlidingGatherer::lambda$initializer$0 → KILLED

2.2
Location : initializer
Killed by : com.pivovarit.gatherers.blackbox.WindowSlidingTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.WindowSlidingTest]/[method:shouldWindowSlidingEmpty()] replaced return value with null for com/pivovarit/gatherers/WindowSlidingGatherer::initializer → KILLED

32

1.1
Location : lambda$integrator$1
Killed by : none replaced boolean return with true for com/pivovarit/gatherers/WindowSlidingGatherer::lambda$integrator$1 → SURVIVED Covering tests

2.2
Location : integrator
Killed by : com.pivovarit.gatherers.blackbox.WindowSlidingTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.WindowSlidingTest]/[method:shouldWindowSlidingWithStep1()] replaced return value with null for com/pivovarit/gatherers/WindowSlidingGatherer::integrator → KILLED

3.3
Location : lambda$integrator$1
Killed by : none replaced boolean return with false for com/pivovarit/gatherers/WindowSlidingGatherer::lambda$integrator$1 → SURVIVED Covering tests

37

1.1
Location : finisher
Killed by : com.pivovarit.gatherers.blackbox.WindowSlidingTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.WindowSlidingTest]/[method:shouldWindowSlidingEmpty()] replaced return value with null for com/pivovarit/gatherers/WindowSlidingGatherer::finisher → KILLED

46

1.1
Location : integrate
Killed by : com.pivovarit.gatherers.blackbox.WindowSlidingTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.WindowSlidingTest]/[method:shouldWindowSlidingWithStep1()] Replaced integer addition with subtraction → KILLED

48

1.1
Location : integrate
Killed by : com.pivovarit.gatherers.blackbox.WindowSlidingTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.WindowSlidingTest]/[method:shouldWindowSlidingWithStep1()] negated conditional → KILLED

2.2
Location : integrate
Killed by : com.pivovarit.gatherers.blackbox.WindowSlidingTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.WindowSlidingTest]/[method:shouldWindowSlidingWithStep1()] changed conditional boundary → KILLED

49

1.1
Location : integrate
Killed by : none replaced boolean return with false for com/pivovarit/gatherers/WindowSlidingGatherer$SlidingWindow::integrate → SURVIVED Covering tests

53

1.1
Location : integrate
Killed by : com.pivovarit.gatherers.blackbox.WindowSlidingTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.WindowSlidingTest]/[method:shouldWindowSlidingWithStep1()] Replaced integer subtraction with addition → KILLED

2.2
Location : integrate
Killed by : com.pivovarit.gatherers.blackbox.WindowSlidingTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.WindowSlidingTest]/[method:shouldWindowSlidingWithStep1()] removed call to java/lang/System::arraycopy → KILLED

55

1.1
Location : integrate
Killed by : com.pivovarit.gatherers.blackbox.WindowSlidingTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.WindowSlidingTest]/[method:shouldWindowSlidingWithStep1()] Replaced integer subtraction with addition → KILLED

57

1.1
Location : integrate
Killed by : none replaced boolean return with true for com/pivovarit/gatherers/WindowSlidingGatherer$SlidingWindow::integrate → SURVIVED Covering tests

2.2
Location : integrate
Killed by : none replaced boolean return with false for com/pivovarit/gatherers/WindowSlidingGatherer$SlidingWindow::integrate → SURVIVED Covering tests

62

1.1
Location : finish
Killed by : com.pivovarit.gatherers.blackbox.WindowSlidingTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.WindowSlidingTest]/[method:shouldWindowSlidingEmpty()] negated conditional → KILLED

2.2
Location : finish
Killed by : com.pivovarit.gatherers.blackbox.WindowSlidingTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.WindowSlidingTest]/[method:shouldWindowSlidingEmpty()] changed conditional boundary → KILLED

3.3
Location : finish
Killed by : com.pivovarit.gatherers.blackbox.WindowSlidingTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.WindowSlidingTest]/[method:shouldWindowSlidingWithStep1()] negated conditional → KILLED

4.4
Location : finish
Killed by : com.pivovarit.gatherers.blackbox.WindowSlidingTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.WindowSlidingTest]/[method:shouldWindowSlidingWithWindowSizeGreaterThanStreamSize()] negated conditional → KILLED

64

1.1
Location : finish
Killed by : com.pivovarit.gatherers.blackbox.WindowSlidingTest.[engine:junit-jupiter]/[class:com.pivovarit.gatherers.blackbox.WindowSlidingTest]/[method:shouldWindowSlidingWithWindowSizeGreaterThanStreamSize()] removed call to java/lang/System::arraycopy → KILLED

Active mutators

Tests examined


Report generated by PIT 1.17.1