| 1 | /* | |
| 2 | * Copyright 2004 the original author or authors. | |
| 3 | * | |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
| 5 | * you may not use this file except in compliance with the License. | |
| 6 | * You may obtain a copy of the License at | |
| 7 | * | |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 9 | * | |
| 10 | * Unless required by applicable law or agreed to in writing, software | |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 13 | * See the License for the specific language governing permissions and | |
| 14 | * limitations under the License. | |
| 15 | */ | |
| 16 | package com.ancientprogramming.fixedformat4j.format.impl; | |
| 17 | ||
| 18 | import com.ancientprogramming.fixedformat4j.format.AbstractFixedFormatter; | |
| 19 | import com.ancientprogramming.fixedformat4j.format.FormatInstructions; | |
| 20 | ||
| 21 | import java.time.format.DateTimeFormatter; | |
| 22 | import java.util.concurrent.ConcurrentHashMap; | |
| 23 | ||
| 24 | /** | |
| 25 | * Base class for pattern-based date/time formatters. | |
| 26 | * | |
| 27 | * <p>Overrides {@link #stripPadding} to restore padding characters that belong | |
| 28 | * to the date/time value rather than to the field padding. This is necessary when | |
| 29 | * {@code paddingChar} equals a character that can also appear within a formatted date | |
| 30 | * (e.g. {@code '0'} with a pattern like {@code yyyyMMddHHmmss} where seconds may be | |
| 31 | * {@code 00}). | |
| 32 | * | |
| 33 | * <p>After stripping padding, if the result is shorter than the formatted output length | |
| 34 | * for the pattern, it is re-padded to that length so that the underlying date parser | |
| 35 | * receives a well-formed string. | |
| 36 | * | |
| 37 | * <p>The formatted length for each pattern is computed once per (formatter subclass, pattern) | |
| 38 | * pair and cached in a {@link ClassValue}-backed map. Values are automatically eligible for GC | |
| 39 | * when the formatter's defining classloader is collected, preventing classloader leaks in | |
| 40 | * hot-reload and multi-classloader environments. | |
| 41 | * | |
| 42 | * @param <T> the date/time type handled by this formatter | |
| 43 | * @author Jacob von Eyben - <a href="https://eybenconsult.com">https://eybenconsult.com</a> | |
| 44 | * @since 1.6.1 | |
| 45 | */ | |
| 46 | public abstract class AbstractPatternFormatter<T> extends AbstractFixedFormatter<T> { | |
| 47 | ||
| 48 | // Keyed by formatter Class; values are collected when the formatter class's classloader is GC'd. | |
| 49 | private static final ClassValue<ConcurrentHashMap<String, Integer>> PATTERN_LENGTH_CACHE = | |
| 50 | new ClassValue<>() { | |
| 51 | @Override | |
| 52 | protected ConcurrentHashMap<String, Integer> computeValue(Class<?> type) { | |
| 53 |
2
1. computeValue : replaced return value with null for com/ancientprogramming/fixedformat4j/format/impl/AbstractPatternFormatter$1::computeValue → SURVIVED 2. computeValue : removed call to java/util/concurrent/ConcurrentHashMap::<init> → SURVIVED |
return new ConcurrentHashMap<>(); |
| 54 | } | |
| 55 | }; | |
| 56 | ||
| 57 | // DateTimeFormatter is immutable and thread-safe — shared across all threads, no ThreadLocal needed. | |
| 58 | private static final ClassValue<ConcurrentHashMap<String, DateTimeFormatter>> FORMATTER_CACHE = | |
| 59 | new ClassValue<>() { | |
| 60 | @Override | |
| 61 | protected ConcurrentHashMap<String, DateTimeFormatter> computeValue(Class<?> type) { | |
| 62 |
2
1. computeValue : removed call to java/util/concurrent/ConcurrentHashMap::<init> → SURVIVED 2. computeValue : replaced return value with null for com/ancientprogramming/fixedformat4j/format/impl/AbstractPatternFormatter$2::computeValue → SURVIVED |
return new ConcurrentHashMap<>(); |
| 63 | } | |
| 64 | }; | |
| 65 | ||
| 66 | /** | |
| 67 | * Strips padding, then re-applies it when the padding character overlaps with | |
| 68 | * characters that are significant in the date/time pattern. | |
| 69 | * | |
| 70 | * <p>For example, with padding {@code '0'} and pattern {@code yyyyMMddHHmmss}, | |
| 71 | * a field value of {@code "00"} (seconds) would otherwise be stripped to an empty | |
| 72 | * string, making the date un-parseable. This override detects that case and | |
| 73 | * restores the stripped characters before returning. | |
| 74 | * | |
| 75 | * <p>{@inheritDoc} | |
| 76 | */ | |
| 77 | @Override | |
| 78 | protected String stripPadding(String value, FormatInstructions instructions) { | |
| 79 |
4
1. stripPadding : removed call to com/ancientprogramming/fixedformat4j/annotation/Align::remove → KILLED 2. stripPadding : removed call to com/ancientprogramming/fixedformat4j/format/FormatInstructions::getAlignment → KILLED 3. stripPadding : replaced call to com/ancientprogramming/fixedformat4j/annotation/Align::remove with argument → KILLED 4. stripPadding : removed call to com/ancientprogramming/fixedformat4j/format/FormatInstructions::getPaddingChar → KILLED |
String stripped = instructions.getAlignment().remove(value, instructions.getPaddingChar()); |
| 80 |
4
1. stripPadding : removed conditional - replaced equality check with false → KILLED 2. stripPadding : negated conditional → KILLED 3. stripPadding : removed conditional - replaced equality check with true → KILLED 4. stripPadding : removed call to java/lang/String::isEmpty → KILLED |
if (stripped.isEmpty()) { |
| 81 |
1
1. stripPadding : replaced return value with "" for com/ancientprogramming/fixedformat4j/format/impl/AbstractPatternFormatter::stripPadding → SURVIVED |
return stripped; |
| 82 | } | |
| 83 |
2
1. stripPadding : removed call to com/ancientprogramming/fixedformat4j/format/FormatInstructions::getFixedFormatPatternData → KILLED 2. stripPadding : removed call to com/ancientprogramming/fixedformat4j/format/data/FixedFormatPatternData::getPattern → KILLED |
String pattern = instructions.getFixedFormatPatternData().getPattern(); |
| 84 |
1
1. stripPadding : removed call to com/ancientprogramming/fixedformat4j/format/impl/AbstractPatternFormatter::formattedLengthForPattern → KILLED |
int formattedLength = formattedLengthForPattern(pattern); |
| 85 |
5
1. stripPadding : removed call to java/lang/String::length → SURVIVED 2. stripPadding : removed conditional - replaced comparison check with true → SURVIVED 3. stripPadding : changed conditional boundary → SURVIVED 4. stripPadding : negated conditional → KILLED 5. stripPadding : removed conditional - replaced comparison check with false → KILLED |
if (stripped.length() < formattedLength) { |
| 86 |
5
1. stripPadding : replaced return value with "" for com/ancientprogramming/fixedformat4j/format/impl/AbstractPatternFormatter::stripPadding → KILLED 2. stripPadding : removed call to com/ancientprogramming/fixedformat4j/format/FormatInstructions::getAlignment → KILLED 3. stripPadding : removed call to com/ancientprogramming/fixedformat4j/format/FormatInstructions::getPaddingChar → KILLED 4. stripPadding : replaced call to com/ancientprogramming/fixedformat4j/annotation/Align::apply with argument → KILLED 5. stripPadding : removed call to com/ancientprogramming/fixedformat4j/annotation/Align::apply → KILLED |
return instructions.getAlignment().apply(stripped, formattedLength, instructions.getPaddingChar()); |
| 87 | } | |
| 88 |
1
1. stripPadding : replaced return value with "" for com/ancientprogramming/fixedformat4j/format/impl/AbstractPatternFormatter::stripPadding → KILLED |
return stripped; |
| 89 | } | |
| 90 | ||
| 91 | protected final int formattedLengthForPattern(String pattern) { | |
| 92 |
3
1. formattedLengthForPattern : removed call to java/lang/ClassValue::get → KILLED 2. formattedLengthForPattern : replaced int return with 0 for com/ancientprogramming/fixedformat4j/format/impl/AbstractPatternFormatter::formattedLengthForPattern → KILLED 3. formattedLengthForPattern : removed call to java/lang/Object::getClass → KILLED |
return PATTERN_LENGTH_CACHE.get(getClass()) |
| 93 |
3
1. formattedLengthForPattern : removed call to java/lang/Integer::intValue → KILLED 2. formattedLengthForPattern : removed call to java/util/concurrent/ConcurrentHashMap::computeIfAbsent → KILLED 3. formattedLengthForPattern : replaced call to java/util/concurrent/ConcurrentHashMap::computeIfAbsent with argument → KILLED |
.computeIfAbsent(pattern, this::computeFormattedLengthForPattern); |
| 94 | } | |
| 95 | ||
| 96 | protected final DateTimeFormatter formatterForPattern(String pattern) { | |
| 97 |
3
1. formatterForPattern : removed call to java/lang/Object::getClass → KILLED 2. formatterForPattern : removed call to java/lang/ClassValue::get → KILLED 3. formatterForPattern : replaced return value with null for com/ancientprogramming/fixedformat4j/format/impl/AbstractPatternFormatter::formatterForPattern → KILLED |
return FORMATTER_CACHE.get(getClass()) |
| 98 |
2
1. formatterForPattern : removed call to java/util/concurrent/ConcurrentHashMap::computeIfAbsent → KILLED 2. formatterForPattern : replaced call to java/util/concurrent/ConcurrentHashMap::computeIfAbsent with argument → KILLED |
.computeIfAbsent(pattern, DateTimeFormatter::ofPattern); |
| 99 | } | |
| 100 | ||
| 101 | /** | |
| 102 | * Returns the number of characters that this formatter's pattern produces when applied | |
| 103 | * to any date/time value. Used to restore padding characters that are part of the | |
| 104 | * date/time value rather than field padding. | |
| 105 | * | |
| 106 | * <p>This method is called at most once per (formatter type, pattern) pair; results are | |
| 107 | * cached by {@link #formattedLengthForPattern}. | |
| 108 | * | |
| 109 | * @param pattern the date/time pattern string | |
| 110 | * @return the fixed character length of the formatted output | |
| 111 | */ | |
| 112 | protected abstract int computeFormattedLengthForPattern(String pattern); | |
| 113 | } | |
Mutations | ||
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1.1 2.2 |
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| 62 |
1.1 2.2 |
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| 79 |
1.1 2.2 3.3 4.4 |
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| 80 |
1.1 2.2 3.3 4.4 |
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| 81 |
1.1 |
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| 83 |
1.1 2.2 |
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| 84 |
1.1 |
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| 85 |
1.1 2.2 3.3 4.4 5.5 |
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| 86 |
1.1 2.2 3.3 4.4 5.5 |
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| 88 |
1.1 |
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| 92 |
1.1 2.2 3.3 |
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| 93 |
1.1 2.2 3.3 |
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| 97 |
1.1 2.2 3.3 |
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| 98 |
1.1 2.2 |