MutableNode.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.LinkedHashMap;
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import java.util.Map;
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/**
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 * Mutable build-time node.
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 *
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 * <p>
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 * The maps exposed by the accessors are the internal mutable backing state of
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 * the node. They are returned directly for efficiency and are intended only for
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 * closely related trie-building infrastructure.
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 *
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 * @param <V> value type
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 */
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public final class MutableNode<V> {
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    /**
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     * Child nodes indexed by transition character.
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     */
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    private final Map<Character, MutableNode<V>> children;
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    /**
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     * Local terminal value counts stored exactly at this node.
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     */
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    private final Map<V, Integer> valueCounts;
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    /**
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     * Creates an empty node.
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     */
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    public MutableNode() {
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        this.children = new LinkedHashMap<>();
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        this.valueCounts = new LinkedHashMap<>();
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    }
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    /**
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     * Returns the internal child-node map indexed by transition character.
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     *
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     * <p>
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     * The returned map is the internal mutable backing state of this node and is
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     * exposed only for efficient cooperation with trie-building infrastructure.
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     *
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     * @return internal child-node map
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     */
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    public Map<Character, MutableNode<V>> children() {
76 1 1. children : replaced return value with Collections.emptyMap for org/egothor/stemmer/trie/MutableNode::children → KILLED
 
        return this.children;
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    }
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    /**
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     * Returns the internal local terminal value-count map.
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     *
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     * <p>
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     * The returned map is the internal mutable backing state of this node and is
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     * exposed only for efficient cooperation with trie-building infrastructure.
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     *
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     * @return internal local value-count map
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     */
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    public Map<V, Integer> valueCounts() {
89 1 1. valueCounts : replaced return value with Collections.emptyMap for org/egothor/stemmer/trie/MutableNode::valueCounts → KILLED
 
        return this.valueCounts;
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    }
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}

Mutations

76

1.1
Location : children
Killed by : org.egothor.stemmer.trie.MutableNodeTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.trie.MutableNodeTest]/[method:shouldExposeMutableBackingChildrenMap()] replaced return value with Collections.emptyMap for org/egothor/stemmer/trie/MutableNode::children → KILLED

89

1.1
Location : valueCounts
Killed by : org.egothor.stemmer.trie.MutableNodeTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.trie.MutableNodeTest]/[method:shouldExposeMutableBackingValueCountsMap()] replaced return value with Collections.emptyMap for org/egothor/stemmer/trie/MutableNode::valueCounts → KILLED

Active mutators

Tests examined


Report generated by PIT 1.22.1