FrequencyTrieBuilders.java

/*******************************************************************************
 * Copyright (C) 2026, Leo Galambos
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 ******************************************************************************/
package org.egothor.stemmer;

import java.util.IdentityHashMap;
import java.util.Map;
import java.util.Objects;
import java.util.function.Function;
import java.util.function.IntFunction;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.egothor.stemmer.trie.CompiledNode;

/**
 * Factory utilities related to {@link FrequencyTrie.Builder}.
 *
 * <p>
 * This helper reconstructs writable builders from compiled read-only tries. The
 * reconstruction preserves the semantics and local counts of the compiled trie
 * as currently stored, which makes it suitable for subsequent modifications
 * followed by recompilation.
 *
 * <p>
 * Reconstruction operates on the compiled form. Therefore, if the compiled trie
 * was produced using a reduction mode that merged semantically equivalent
 * subtrees, the recreated builder reflects that reduced compiled state rather
 * than the exact original unreduced insertion history.
 */
public final class FrequencyTrieBuilders {

    /**
     * Logger of this class.
     */
    private static final Logger LOGGER = Logger.getLogger(FrequencyTrieBuilders.class.getName());

    /**
     * Utility class.
     */
    private FrequencyTrieBuilders() {
        throw new AssertionError("No instances.");
    }

    /**
     * Reconstructs a new writable builder from a compiled read-only trie.
     *
     * <p>
     * The returned builder contains the same key-local value counts as the supplied
     * compiled trie. Callers may continue modifying the returned builder and then
     * compile a new {@link FrequencyTrie} instance.
     *
     * @param source            source compiled trie
     * @param arrayFactory      array factory for the reconstructed builder
     * @param reductionSettings reduction settings to associate with the new builder
     * @param <V>               value type
     * @return reconstructed writable builder
     * @throws NullPointerException if any argument is {@code null}
     */
    public static <V> FrequencyTrie.Builder<V> copyOf(final FrequencyTrie<V> source,
            final IntFunction<V[]> arrayFactory, final ReductionSettings reductionSettings) {
        Objects.requireNonNull(source, "source");
        Objects.requireNonNull(arrayFactory, "arrayFactory");
        Objects.requireNonNull(reductionSettings, "reductionSettings");

        final FrequencyTrie.Builder<V> builder = new FrequencyTrie.Builder<>(arrayFactory, reductionSettings,
                source.traversalDirection(), source.metadata().caseProcessingMode(),
                source.metadata().diacriticProcessingMode());
        final StringBuilder keyBuilder = new StringBuilder(64);

        copyNode(source.root(), keyBuilder, builder, source.traversalDirection());

        LOGGER.log(Level.FINE, "Reconstructed writable builder from compiled trie.");
        return builder;
    }

    /**
     * Reconstructs a new writable builder from a compiled read-only trie using
     * default settings for the supplied reduction mode.
     *
     * @param source        source compiled trie
     * @param arrayFactory  array factory for the reconstructed builder
     * @param reductionMode reduction mode to associate with the new builder
     * @param <V>           value type
     * @return reconstructed writable builder
     * @throws NullPointerException if any argument is {@code null}
     */
    public static <V> FrequencyTrie.Builder<V> copyOf(final FrequencyTrie<V> source,
            final IntFunction<V[]> arrayFactory, final ReductionMode reductionMode) {
        Objects.requireNonNull(reductionMode, "reductionMode");
        return copyOf(source, arrayFactory, ReductionSettings.withDefaults(reductionMode));
    }

    /**
     * Reconstructs a compiled trie with every stored value transformed to another
     * value type.
     *
     * <p>
     * The method preserves logical keys, local value counts, trie metadata, and the
     * supplied reduction settings. It is intended for runtime specialization, such
     * as replacing serialized patch-command strings with precompiled patch command
     * objects without changing the persisted binary trie format.
     * </p>
     *
     * @param source            source compiled trie
     * @param arrayFactory      array factory for mapped values
     * @param reductionSettings reduction settings for the mapped trie
     * @param valueMapper       value mapping function
     * @param <S>               source value type
     * @param <T>               target value type
     * @return compiled trie containing mapped values
     * @throws NullPointerException if any argument is {@code null}
     */
    public static <S, T> FrequencyTrie<T> mapValues(final FrequencyTrie<S> source,
            final IntFunction<T[]> arrayFactory, final ReductionSettings reductionSettings,
            final Function<? super S, ? extends T> valueMapper) {
        Objects.requireNonNull(source, "source");
        Objects.requireNonNull(arrayFactory, "arrayFactory");
        Objects.requireNonNull(reductionSettings, "reductionSettings");
        Objects.requireNonNull(valueMapper, "valueMapper");

        final Map<CompiledNode<S>, CompiledNode<T>> cache = new IdentityHashMap<>();
        final CompiledNode<T> mappedRoot = mapCompiledNode(source.root(), arrayFactory, valueMapper, cache);
        final TrieMetadata metadata = TrieMetadata.forCompilation(source.traversalDirection(), reductionSettings,
                source.metadata().diacriticProcessingMode(), source.metadata().caseProcessingMode());

        LOGGER.log(Level.FINE, "Mapped compiled trie values to a specialized value type.");
        return FrequencyTrie.fromCompiled(arrayFactory, mappedRoot, metadata);
    }

    /**
     * Reconstructs a compiled trie with every stored value transformed to another
     * value type using default settings for the supplied reduction mode.
     *
     * @param source        source compiled trie
     * @param arrayFactory  array factory for mapped values
     * @param reductionMode reduction mode for the mapped trie
     * @param valueMapper   value mapping function
     * @param <S>           source value type
     * @param <T>           target value type
     * @return compiled trie containing mapped values
     * @throws NullPointerException if any argument is {@code null}
     */
    public static <S, T> FrequencyTrie<T> mapValues(final FrequencyTrie<S> source,
            final IntFunction<T[]> arrayFactory, final ReductionMode reductionMode,
            final Function<? super S, ? extends T> valueMapper) {
        Objects.requireNonNull(reductionMode, "reductionMode");
        return mapValues(source, arrayFactory, ReductionSettings.withDefaults(reductionMode), valueMapper);
    }

    /**
     * Copies one compiled node and all reachable descendants into the target
     * builder.
     *
     * @param node               current compiled node
     * @param keyBuilder         current key builder
     * @param builder            target mutable builder
     * @param traversalDirection logical key traversal direction used by the source
     * @param <V>                value type
     */
    private static <V> void copyNode(final CompiledNode<V> node, final StringBuilder keyBuilder,
            final FrequencyTrie.Builder<V> builder, final WordTraversalDirection traversalDirection) {
        final String logicalKey = traversalDirection.traversalPathToLogicalKey(keyBuilder);
        for (int valueIndex = 0; valueIndex < node.orderedValues().length; valueIndex++) {
            builder.put(logicalKey, node.orderedValues()[valueIndex], node.orderedCounts()[valueIndex]);
        }

        for (int childIndex = 0; childIndex < node.edgeLabels().length; childIndex++) {
            keyBuilder.append(node.edgeLabels()[childIndex]);
            copyNode(node.children()[childIndex], keyBuilder, builder, traversalDirection);
            keyBuilder.setLength(keyBuilder.length() - 1);
        }
    }

    /**
     * Maps one compiled node graph while preserving canonical sharing and accepting
     * leaf semantics.
     *
     * @param node         source node
     * @param arrayFactory target value array factory
     * @param valueMapper  value mapper
     * @param cache        identity cache for shared compiled nodes
     * @param <S>          source value type
     * @param <T>          target value type
     * @return mapped compiled node
     */
    private static <S, T> CompiledNode<T> mapCompiledNode(final CompiledNode<S> node,
            final IntFunction<T[]> arrayFactory, final Function<? super S, ? extends T> valueMapper,
            final Map<CompiledNode<S>, CompiledNode<T>> cache) {
        final CompiledNode<T> existing = cache.get(node);
        if (existing != null) {
            return existing;
        }

        final CompiledNode<S>[] sourceChildren = node.children();
        @SuppressWarnings("unchecked")
        final CompiledNode<T>[] mappedChildren = new CompiledNode[sourceChildren.length];
        for (int childIndex = 0; childIndex < sourceChildren.length; childIndex++) {
            mappedChildren[childIndex] = mapCompiledNode(sourceChildren[childIndex], arrayFactory, valueMapper, cache);
        }

        final S[] sourceValues = node.orderedValues();
        final T[] mappedValues = arrayFactory.apply(sourceValues.length);
        for (int valueIndex = 0; valueIndex < sourceValues.length; valueIndex++) {
            mappedValues[valueIndex] = valueMapper.apply(sourceValues[valueIndex]);
        }

        final CompiledNode<T> mapped = new CompiledNode<>(node.edgeLabels().clone(), mappedChildren, mappedValues,
                node.acceptsRemainingInput(), CompiledNode.DEFAULT_MAX_EXPANDED_INDEX, node.orderedCounts().clone());
        cache.put(node, mapped);
        return mapped;
    }
}
















Active mutators

CONDITIONALS_BOUNDARY
EMPTY_RETURNS
FALSE_RETURNS
INCREMENTS
INVERT_NEGS
MATH
NEGATE_CONDITIONALS
NULL_RETURNS
PRIMITIVE_RETURNS
TRUE_RETURNS
VOID_METHOD_CALLS

Tests examined

org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldMapValuesWhilePreservingKeysAndCounts()] (8 ms)
org.egothor.stemmer.FrequencyTrieTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieTest]/[method:shouldPreserveUniformSubtreeContractionWhenMappingValues()] (4 ms)
org.egothor.stemmer.StemmerModelDocumentationExamplesTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.StemmerModelDocumentationExamplesTest]/[method:loadsExplicitDescriptor()] (642 ms)
org.egothor.stemmer.StemmerModelRegistryTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.StemmerModelRegistryTest]/[method:loadsDefaultPolishModel()] (675 ms)
org.egothor.stemmer.StemmerModelDocumentationExamplesTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.StemmerModelDocumentationExamplesTest]/[method:loadsExplicitModelId()] (697 ms)
org.egothor.stemmer.StemmerModelDocumentationExamplesTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.StemmerModelDocumentationExamplesTest]/[method:loadsDefaultPolishModel()] (2115 ms)
org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldReconstructUsingReductionModeShortcut()] (6 ms)
org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldPreserveLocalCountsAndOrdering()] (7 ms)
org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldAllowFurtherModificationsWithoutAffectingSourceTrie()] (8 ms)
org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldPreserveCompiledSemanticsAfterReconstruction()] (6 ms)
org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldPreserveSiblingBranchesUnderSharedPrefix()] (11 ms)
org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldPreserveRootLocalValues()] (29 ms)
org.egothor.stemmer.FuzzStemmerAndTrieCompilationTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FuzzStemmerAndTrieCompilationTest]/[method:generatedTrieInsertionsShouldPreserveSemanticsAcrossCompilationForms()] (429 ms)
org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldReconstructEmptyTrie()] (0 ms)

Report generated by PIT 1.22.1

1		/*******************************************************************************
2		* Copyright (C) 2026, Leo Galambos
3		* All rights reserved.
4		*
5		* Redistribution and use in source and binary forms, with or without
6		* modification, are permitted provided that the following conditions are met:
7		*
8		* 1. Redistributions of source code must retain the above copyright notice,
9		* this list of conditions and the following disclaimer.
10		*
11		* 2. Redistributions in binary form must reproduce the above copyright notice,
12		* this list of conditions and the following disclaimer in the documentation
13		* and/or other materials provided with the distribution.
14		*
15		* 3. Neither the name of the copyright holder nor the names of its contributors
16		* may be used to endorse or promote products derived from this software
17		* without specific prior written permission.
18		*
19		* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20		* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21		* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22		* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
23		* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24		* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25		* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26		* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27		* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28		* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29		* POSSIBILITY OF SUCH DAMAGE.
30		******************************************************************************/
31		package org.egothor.stemmer;
32
33		import java.util.IdentityHashMap;
34		import java.util.Map;
35		import java.util.Objects;
36		import java.util.function.Function;
37		import java.util.function.IntFunction;
38		import java.util.logging.Level;
39		import java.util.logging.Logger;
40
41		import org.egothor.stemmer.trie.CompiledNode;
42
43		/**
44		* Factory utilities related to {@link FrequencyTrie.Builder}.
45		*
46		* <p>
47		* This helper reconstructs writable builders from compiled read-only tries. The
48		* reconstruction preserves the semantics and local counts of the compiled trie
49		* as currently stored, which makes it suitable for subsequent modifications
50		* followed by recompilation.
51		*
52		* <p>
53		* Reconstruction operates on the compiled form. Therefore, if the compiled trie
54		* was produced using a reduction mode that merged semantically equivalent
55		* subtrees, the recreated builder reflects that reduced compiled state rather
56		* than the exact original unreduced insertion history.
57		*/
58		public final class FrequencyTrieBuilders {
59
60		/**
61		* Logger of this class.
62		*/
63		private static final Logger LOGGER = Logger.getLogger(FrequencyTrieBuilders.class.getName());
64
65		/**
66		* Utility class.
67		*/
68		private FrequencyTrieBuilders() {
69		throw new AssertionError("No instances.");
70		}
71
72		/**
73		* Reconstructs a new writable builder from a compiled read-only trie.
74		*
75		* <p>
76		* The returned builder contains the same key-local value counts as the supplied
77		* compiled trie. Callers may continue modifying the returned builder and then
78		* compile a new {@link FrequencyTrie} instance.
79		*
80		* @param source source compiled trie
81		* @param arrayFactory array factory for the reconstructed builder
82		* @param reductionSettings reduction settings to associate with the new builder
83		* @param <V> value type
84		* @return reconstructed writable builder
85		* @throws NullPointerException if any argument is {@code null}
86		*/
87		public static <V> FrequencyTrie.Builder<V> copyOf(final FrequencyTrie<V> source,
88		final IntFunction<V[]> arrayFactory, final ReductionSettings reductionSettings) {
89		Objects.requireNonNull(source, "source");
90		Objects.requireNonNull(arrayFactory, "arrayFactory");
91		Objects.requireNonNull(reductionSettings, "reductionSettings");
92
93		final FrequencyTrie.Builder<V> builder = new FrequencyTrie.Builder<>(arrayFactory, reductionSettings,
94		source.traversalDirection(), source.metadata().caseProcessingMode(),
95		source.metadata().diacriticProcessingMode());
96		final StringBuilder keyBuilder = new StringBuilder(64);
97
98	1 1. copyOf : removed call to org/egothor/stemmer/FrequencyTrieBuilders::copyNode → KILLED	copyNode(source.root(), keyBuilder, builder, source.traversalDirection());
99
100		LOGGER.log(Level.FINE, "Reconstructed writable builder from compiled trie.");
101	1 1. copyOf : replaced return value with null for org/egothor/stemmer/FrequencyTrieBuilders::copyOf → KILLED	return builder;
102		}
103
104		/**
105		* Reconstructs a new writable builder from a compiled read-only trie using
106		* default settings for the supplied reduction mode.
107		*
108		* @param source source compiled trie
109		* @param arrayFactory array factory for the reconstructed builder
110		* @param reductionMode reduction mode to associate with the new builder
111		* @param <V> value type
112		* @return reconstructed writable builder
113		* @throws NullPointerException if any argument is {@code null}
114		*/
115		public static <V> FrequencyTrie.Builder<V> copyOf(final FrequencyTrie<V> source,
116		final IntFunction<V[]> arrayFactory, final ReductionMode reductionMode) {
117		Objects.requireNonNull(reductionMode, "reductionMode");
118	1 1. copyOf : replaced return value with null for org/egothor/stemmer/FrequencyTrieBuilders::copyOf → KILLED	return copyOf(source, arrayFactory, ReductionSettings.withDefaults(reductionMode));
119		}
120
121		/**
122		* Reconstructs a compiled trie with every stored value transformed to another
123		* value type.
124		*
125		* <p>
126		* The method preserves logical keys, local value counts, trie metadata, and the
127		* supplied reduction settings. It is intended for runtime specialization, such
128		* as replacing serialized patch-command strings with precompiled patch command
129		* objects without changing the persisted binary trie format.
130		* </p>
131		*
132		* @param source source compiled trie
133		* @param arrayFactory array factory for mapped values
134		* @param reductionSettings reduction settings for the mapped trie
135		* @param valueMapper value mapping function
136		* @param <S> source value type
137		* @param <T> target value type
138		* @return compiled trie containing mapped values
139		* @throws NullPointerException if any argument is {@code null}
140		*/
141		public static <S, T> FrequencyTrie<T> mapValues(final FrequencyTrie<S> source,
142		final IntFunction<T[]> arrayFactory, final ReductionSettings reductionSettings,
143		final Function<? super S, ? extends T> valueMapper) {
144		Objects.requireNonNull(source, "source");
145		Objects.requireNonNull(arrayFactory, "arrayFactory");
146		Objects.requireNonNull(reductionSettings, "reductionSettings");
147		Objects.requireNonNull(valueMapper, "valueMapper");
148
149		final Map<CompiledNode<S>, CompiledNode<T>> cache = new IdentityHashMap<>();
150		final CompiledNode<T> mappedRoot = mapCompiledNode(source.root(), arrayFactory, valueMapper, cache);
151		final TrieMetadata metadata = TrieMetadata.forCompilation(source.traversalDirection(), reductionSettings,
152		source.metadata().diacriticProcessingMode(), source.metadata().caseProcessingMode());
153
154		LOGGER.log(Level.FINE, "Mapped compiled trie values to a specialized value type.");
155	1 1. mapValues : replaced return value with null for org/egothor/stemmer/FrequencyTrieBuilders::mapValues → KILLED	return FrequencyTrie.fromCompiled(arrayFactory, mappedRoot, metadata);
156		}
157
158		/**
159		* Reconstructs a compiled trie with every stored value transformed to another
160		* value type using default settings for the supplied reduction mode.
161		*
162		* @param source source compiled trie
163		* @param arrayFactory array factory for mapped values
164		* @param reductionMode reduction mode for the mapped trie
165		* @param valueMapper value mapping function
166		* @param <S> source value type
167		* @param <T> target value type
168		* @return compiled trie containing mapped values
169		* @throws NullPointerException if any argument is {@code null}
170		*/
171		public static <S, T> FrequencyTrie<T> mapValues(final FrequencyTrie<S> source,
172		final IntFunction<T[]> arrayFactory, final ReductionMode reductionMode,
173		final Function<? super S, ? extends T> valueMapper) {
174		Objects.requireNonNull(reductionMode, "reductionMode");
175	1 1. mapValues : replaced return value with null for org/egothor/stemmer/FrequencyTrieBuilders::mapValues → NO_COVERAGE	return mapValues(source, arrayFactory, ReductionSettings.withDefaults(reductionMode), valueMapper);
176		}
177
178		/**
179		* Copies one compiled node and all reachable descendants into the target
180		* builder.
181		*
182		* @param node current compiled node
183		* @param keyBuilder current key builder
184		* @param builder target mutable builder
185		* @param traversalDirection logical key traversal direction used by the source
186		* @param <V> value type
187		*/
188		private static <V> void copyNode(final CompiledNode<V> node, final StringBuilder keyBuilder,
189		final FrequencyTrie.Builder<V> builder, final WordTraversalDirection traversalDirection) {
190		final String logicalKey = traversalDirection.traversalPathToLogicalKey(keyBuilder);
191	2 1. copyNode : changed conditional boundary → KILLED 2. copyNode : negated conditional → KILLED	for (int valueIndex = 0; valueIndex < node.orderedValues().length; valueIndex++) {
192		builder.put(logicalKey, node.orderedValues()[valueIndex], node.orderedCounts()[valueIndex]);
193		}
194
195	2 1. copyNode : changed conditional boundary → KILLED 2. copyNode : negated conditional → KILLED	for (int childIndex = 0; childIndex < node.edgeLabels().length; childIndex++) {
196		keyBuilder.append(node.edgeLabels()[childIndex]);
197	1 1. copyNode : removed call to org/egothor/stemmer/FrequencyTrieBuilders::copyNode → KILLED	copyNode(node.children()[childIndex], keyBuilder, builder, traversalDirection);
198	2 1. copyNode : removed call to java/lang/StringBuilder::setLength → KILLED 2. copyNode : Replaced integer subtraction with addition → KILLED	keyBuilder.setLength(keyBuilder.length() - 1);
199		}
200		}
201
202		/**
203		* Maps one compiled node graph while preserving canonical sharing and accepting
204		* leaf semantics.
205		*
206		* @param node source node
207		* @param arrayFactory target value array factory
208		* @param valueMapper value mapper
209		* @param cache identity cache for shared compiled nodes
210		* @param <S> source value type
211		* @param <T> target value type
212		* @return mapped compiled node
213		*/
214		private static <S, T> CompiledNode<T> mapCompiledNode(final CompiledNode<S> node,
215		final IntFunction<T[]> arrayFactory, final Function<? super S, ? extends T> valueMapper,
216		final Map<CompiledNode<S>, CompiledNode<T>> cache) {
217		final CompiledNode<T> existing = cache.get(node);
218	1 1. mapCompiledNode : negated conditional → KILLED	if (existing != null) {
219	1 1. mapCompiledNode : replaced return value with null for org/egothor/stemmer/FrequencyTrieBuilders::mapCompiledNode → KILLED	return existing;
220		}
221
222		final CompiledNode<S>[] sourceChildren = node.children();
223		@SuppressWarnings("unchecked")
224		final CompiledNode<T>[] mappedChildren = new CompiledNode[sourceChildren.length];
225	2 1. mapCompiledNode : changed conditional boundary → KILLED 2. mapCompiledNode : negated conditional → KILLED	for (int childIndex = 0; childIndex < sourceChildren.length; childIndex++) {
226		mappedChildren[childIndex] = mapCompiledNode(sourceChildren[childIndex], arrayFactory, valueMapper, cache);
227		}
228
229		final S[] sourceValues = node.orderedValues();
230		final T[] mappedValues = arrayFactory.apply(sourceValues.length);
231	2 1. mapCompiledNode : changed conditional boundary → KILLED 2. mapCompiledNode : negated conditional → KILLED	for (int valueIndex = 0; valueIndex < sourceValues.length; valueIndex++) {
232		mappedValues[valueIndex] = valueMapper.apply(sourceValues[valueIndex]);
233		}
234
235		final CompiledNode<T> mapped = new CompiledNode<>(node.edgeLabels().clone(), mappedChildren, mappedValues,
236		node.acceptsRemainingInput(), CompiledNode.DEFAULT_MAX_EXPANDED_INDEX, node.orderedCounts().clone());
237		cache.put(node, mapped);
238	1 1. mapCompiledNode : replaced return value with null for org/egothor/stemmer/FrequencyTrieBuilders::mapCompiledNode → KILLED	return mapped;
239		}
240		}
		Mutations
98		1.1 Location : copyOf Killed by : org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldPreserveLocalCountsAndOrdering()] removed call to org/egothor/stemmer/FrequencyTrieBuilders::copyNode → KILLED
101		1.1 Location : copyOf Killed by : org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldReconstructEmptyTrie()] replaced return value with null for org/egothor/stemmer/FrequencyTrieBuilders::copyOf → KILLED
118		1.1 Location : copyOf Killed by : org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldReconstructUsingReductionModeShortcut()] replaced return value with null for org/egothor/stemmer/FrequencyTrieBuilders::copyOf → KILLED
155		1.1 Location : mapValues Killed by : org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldMapValuesWhilePreservingKeysAndCounts()] replaced return value with null for org/egothor/stemmer/FrequencyTrieBuilders::mapValues → KILLED
175		1.1 Location : mapValues Killed by : none replaced return value with null for org/egothor/stemmer/FrequencyTrieBuilders::mapValues → NO_COVERAGE
191		1.1 Location : copyNode Killed by : org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldReconstructEmptyTrie()] changed conditional boundary → KILLED 2.2 Location : copyNode Killed by : org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldReconstructEmptyTrie()] negated conditional → KILLED
195		1.1 Location : copyNode Killed by : org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldReconstructEmptyTrie()] changed conditional boundary → KILLED 2.2 Location : copyNode Killed by : org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldReconstructEmptyTrie()] negated conditional → KILLED
197		1.1 Location : copyNode Killed by : org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldPreserveLocalCountsAndOrdering()] removed call to org/egothor/stemmer/FrequencyTrieBuilders::copyNode → KILLED
198		1.1 Location : copyNode Killed by : org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldReconstructUsingReductionModeShortcut()] removed call to java/lang/StringBuilder::setLength → KILLED 2.2 Location : copyNode Killed by : org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldReconstructUsingReductionModeShortcut()] Replaced integer subtraction with addition → KILLED
218		1.1 Location : mapCompiledNode Killed by : org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldMapValuesWhilePreservingKeysAndCounts()] negated conditional → KILLED
219		1.1 Location : mapCompiledNode Killed by : org.egothor.stemmer.StemmerModelDocumentationExamplesTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.StemmerModelDocumentationExamplesTest]/[method:loadsExplicitDescriptor()] replaced return value with null for org/egothor/stemmer/FrequencyTrieBuilders::mapCompiledNode → KILLED
225		1.1 Location : mapCompiledNode Killed by : org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldMapValuesWhilePreservingKeysAndCounts()] changed conditional boundary → KILLED 2.2 Location : mapCompiledNode Killed by : org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldMapValuesWhilePreservingKeysAndCounts()] negated conditional → KILLED
231		1.1 Location : mapCompiledNode Killed by : org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldMapValuesWhilePreservingKeysAndCounts()] changed conditional boundary → KILLED 2.2 Location : mapCompiledNode Killed by : org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldMapValuesWhilePreservingKeysAndCounts()] negated conditional → KILLED
238		1.1 Location : mapCompiledNode Killed by : org.egothor.stemmer.FrequencyTrieBuildersTest.[engine:junit-jupiter]/[class:org.egothor.stemmer.FrequencyTrieBuildersTest]/[method:shouldMapValuesWhilePreservingKeysAndCounts()] replaced return value with null for org/egothor/stemmer/FrequencyTrieBuilders::mapCompiledNode → KILLED

FrequencyTrieBuilders.java

Mutations

Active mutators

Tests examined