ChildDescriptor.java

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/*******************************************************************************
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 * Copyright (C) 2026, Leo Galambos
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions are met:
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 *
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 * 1. Redistributions of source code must retain the above copyright notice,
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 *    this list of conditions and the following disclaimer.
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 *
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 * 2. Redistributions in binary form must reproduce the above copyright notice,
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 *    this list of conditions and the following disclaimer in the documentation
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 *    and/or other materials provided with the distribution.
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 *
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 * 3. Neither the name of the copyright holder nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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 * POSSIBILITY OF SUCH DAMAGE.
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 ******************************************************************************/
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package org.egothor.stemmer.trie;
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import java.util.Objects;
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/**
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 * Child signature descriptor.
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 *
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 * @param <V> value type
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 */
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/* default */ final class ChildDescriptor<V> {
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    /**
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     * Edge character.
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     */
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    private final char edge;
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    /**
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     * Child subtree signature.
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     */
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    private final ReductionSignature<V> childSignature;
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    /**
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     * Creates a child descriptor.
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     *
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     * @param edge           edge character
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     * @param childSignature child signature
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     */
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    /* default */ ChildDescriptor(final char edge, final ReductionSignature<V> childSignature) {
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        this.edge = edge;
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        this.childSignature = childSignature;
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    }
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    /**
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     * Returns a hash code consistent with descriptor equality.
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     *
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     * @return descriptor hash code
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     */
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    @Override
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    public int hashCode() {
70 1 1. hashCode : replaced int return with 0 for org/egothor/stemmer/trie/ChildDescriptor::hashCode → SURVIVED
 
        return Objects.hash(this.edge, this.childSignature);
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    }
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    /**
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     * Compares this descriptor with another object.
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     *
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     * @param other object to compare with
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     * @return {@code true} when both descriptors represent the same semantic
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     *         reduction identity
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     */
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    @Override
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    public boolean equals(final Object other) {
82 1 1. equals : negated conditional → KILLED
 
        if (this == other) {
83 1 1. equals : replaced boolean return with false for org/egothor/stemmer/trie/ChildDescriptor::equals → NO_COVERAGE
 
            return true;
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        }
85 1 1. equals : negated conditional → KILLED
 
        if (!(other instanceof ChildDescriptor<?>)) {
86 1 1. equals : replaced boolean return with true for org/egothor/stemmer/trie/ChildDescriptor::equals → KILLED
 
            return false;
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        }
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        final ChildDescriptor<?> that = (ChildDescriptor<?>) other;
89 3 1. equals : replaced boolean return with true for org/egothor/stemmer/trie/ChildDescriptor::equals → KILLED
2. equals : negated conditional → KILLED
3. equals : negated conditional → KILLED
 
        return this.edge == that.edge && Objects.equals(this.childSignature, that.childSignature);
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    }
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}

Mutations

70

1.1
Location : hashCode
Killed by : none replaced int return with 0 for org/egothor/stemmer/trie/ChildDescriptor::hashCode → SURVIVED Covering tests

82

1.1
Location : equals
Killed by : org.egothor.stemmer.trie.ChildDescriptorTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.trie.ChildDescriptorTest]/[method:shouldImplementEqualityAndHashCodeFromEdgeAndChildSignature()] negated conditional → KILLED

83

1.1
Location : equals
Killed by : none replaced boolean return with false for org/egothor/stemmer/trie/ChildDescriptor::equals → NO_COVERAGE

85

1.1
Location : equals
Killed by : org.egothor.stemmer.trie.ChildDescriptorTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.trie.ChildDescriptorTest]/[method:shouldImplementEqualityAndHashCodeFromEdgeAndChildSignature()] negated conditional → KILLED

86

1.1
Location : equals
Killed by : org.egothor.stemmer.trie.ChildDescriptorTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.trie.ChildDescriptorTest]/[method:shouldImplementEqualityAndHashCodeFromEdgeAndChildSignature()] replaced boolean return with true for org/egothor/stemmer/trie/ChildDescriptor::equals → KILLED

89

1.1
Location : equals
Killed by : org.egothor.stemmer.trie.ChildDescriptorTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.trie.ChildDescriptorTest]/[method:shouldImplementEqualityAndHashCodeFromEdgeAndChildSignature()] replaced boolean return with true for org/egothor/stemmer/trie/ChildDescriptor::equals → KILLED

2.2
Location : equals
Killed by : org.egothor.stemmer.trie.ChildDescriptorTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.trie.ChildDescriptorTest]/[method:shouldImplementEqualityAndHashCodeFromEdgeAndChildSignature()] negated conditional → KILLED

3.3
Location : equals
Killed by : org.egothor.stemmer.trie.ChildDescriptorTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.trie.ChildDescriptorTest]/[method:shouldImplementEqualityAndHashCodeFromEdgeAndChildSignature()] negated conditional → KILLED

Active mutators

Tests examined


Report generated by PIT 1.22.1