Filterator.java

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/*-
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 * #%L
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 * io.earcam.instrumental.io
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 * %%
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 * Copyright (C) 2018 earcam
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 * %%
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 * SPDX-License-Identifier: (BSD-3-Clause OR EPL-1.0 OR Apache-2.0 OR MIT)
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 *
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 * You <b>must</b> choose to accept, in full - any individual or combination of
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 * the following licenses:
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 * <ul>
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 * 	<li><a href="https://opensource.org/licenses/BSD-3-Clause">BSD-3-Clause</a></li>
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 * 	<li><a href="https://www.eclipse.org/legal/epl-v10.html">EPL-1.0</a></li>
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 * 	<li><a href="https://www.apache.org/licenses/LICENSE-2.0">Apache-2.0</a></li>
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 * 	<li><a href="https://opensource.org/licenses/MIT">MIT</a></li>
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 * </ul>
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 * #L%
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 */
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package io.earcam.utilitarian.io;
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import java.util.Collections;
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import java.util.Iterator;
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import java.util.NoSuchElementException;
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import java.util.Set;
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class Filterator<E> implements Iterator<E> {
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	private Iterator<E> iterator;
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	private Set<E> excludes;
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	private E next;
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	private boolean checked;
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	Filterator(Iterator<E> iterator, E exclude)
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	{
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		this(iterator, Collections.singleton(exclude));
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	}
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	Filterator(Iterator<E> iterator, Set<E> excludes)
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	{
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		this.iterator = iterator;
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		this.excludes = excludes;
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	}
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	@Override
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	public boolean hasNext()
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	{
50 4 1. hasNext : negated conditional → KILLED
2. hasNext : negated conditional → KILLED
3. hasNext : negated conditional → KILLED
4. hasNext : replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED
 
		return checked || (iterator.hasNext() && checkNext());
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	}
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	private boolean checkNext()
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	{
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		next = iterator.next();
57 1 1. checkNext : negated conditional → KILLED
 
		if(excludes.contains(next)) {
58 1 1. checkNext : replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED
 
			return hasNext();
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		}
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		checked = true;
61 1 1. checkNext : replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED
 
		return true;
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	}
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	@Override
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	public E next()
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	{
68 2 1. next : negated conditional → KILLED
2. next : negated conditional → KILLED
 
		if(!(checked || hasNext())) {
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			throw new NoSuchElementException();
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		}
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		checked = false;
72 1 1. next : mutated return of Object value for io/earcam/utilitarian/io/Filterator::next to ( if (x != null) null else throw new RuntimeException ) → KILLED
 
		return next;
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	}
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}

Mutations

50

1.1
Location : hasNext
Killed by : io.earcam.utilitarian.io.FilteratorTest.callingNextOnEmptyIteratorThrows() negated conditional → KILLED

2.2
Location : hasNext
Killed by : io.earcam.utilitarian.io.FilteratorTest.callingNextOnSingleElementIteratorWithoutCheckingHasNext() negated conditional → KILLED

3.3
Location : hasNext
Killed by : io.earcam.utilitarian.io.FilteratorTest.callingNextOnSingleElementIteratorWithoutCheckingHasNext() negated conditional → KILLED

4.4
Location : hasNext
Killed by : io.earcam.utilitarian.io.FilteratorTest.callingNextOnEmptyIteratorThrows() replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED
57

1.1
Location : checkNext
Killed by : io.earcam.utilitarian.io.FilteratorTest.callingNextOnSingleElementIteratorWithoutCheckingHasNext() negated conditional → KILLED
58

1.1
Location : checkNext
Killed by : io.earcam.utilitarian.io.FilteratorTest.doesNotHaveNextWhenWrappedIteratorOnlyContainsExclude() replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED
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1.1
Location : checkNext
Killed by : io.earcam.utilitarian.io.FilteratorTest.callingNextOnSingleElementIteratorWithoutCheckingHasNext() replaced return of integer sized value with (x == 0 ? 1 : 0) → KILLED
68

1.1
Location : next
Killed by : io.earcam.utilitarian.io.FilteratorTest.callingNextOnEmptyIteratorThrows() negated conditional → KILLED

2.2
Location : next
Killed by : io.earcam.utilitarian.io.FilteratorTest.callingNextOnEmptyIteratorThrows() negated conditional → KILLED
72

1.1
Location : next
Killed by : io.earcam.utilitarian.io.FilteratorTest.callingNextOnSingleElementIteratorWithoutCheckingHasNext() mutated return of Object value for io/earcam/utilitarian/io/Filterator::next to ( if (x != null) null else throw new RuntimeException ) → KILLED

Active mutators

Tests examined


Report generated by PIT 1.4.3