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Lazy initialize the emoji pattern #13

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merged 1 commit into from
Nov 9, 2023
Merged

Lazy initialize the emoji pattern #13

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10 changes: 6 additions & 4 deletions lib/src/main/java/net/fellbaum/jemoji/EmojiManager.java
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Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,7 @@ public final class EmojiManager {
private static final Map<Integer, List<Emoji>> EMOJI_FIRST_CODEPOINT_TO_EMOJIS_ORDER_CODEPOINT_LENGTH_DESCENDING;
private static final List<Emoji> EMOJIS_LENGTH_DESCENDING;

private static final Pattern EMOJI_PATTERN;
private static Pattern EMOJI_PATTERN;
private static final Pattern NOT_WANTED_EMOJI_CHARACTERS = Pattern.compile("[\\p{Alpha}\\p{Z}]");

private static final Comparator<Emoji> EMOJI_CODEPOINT_COMPARATOR = (final Emoji o1, final Emoji o2) -> {
Expand All @@ -45,9 +45,6 @@ public final class EmojiManager {
EMOJIS_LENGTH_DESCENDING = Collections.unmodifiableList(emojis.stream().sorted(EMOJI_CODEPOINT_COMPARATOR).collect(Collectors.toList()));

EMOJI_FIRST_CODEPOINT_TO_EMOJIS_ORDER_CODEPOINT_LENGTH_DESCENDING = emojis.stream().collect(getEmojiLinkedHashMapCollector());

EMOJI_PATTERN = Pattern.compile(EMOJIS_LENGTH_DESCENDING.stream()
.map(s -> "(" + Pattern.quote(s.getEmoji()) + ")").collect(Collectors.joining("|")));
} catch (final JsonProcessingException e) {
throw new RuntimeException(e);
}
Expand Down Expand Up @@ -223,6 +220,11 @@ private static String addColonToAlias(final String alias) {
* @return The pattern for all emojis.
*/
public static Pattern getEmojiPattern() {
if (EMOJI_PATTERN == null) {
EMOJI_PATTERN = Pattern.compile(EMOJIS_LENGTH_DESCENDING.stream()
.map(s -> "(" + Pattern.quote(s.getEmoji()) + ")").collect(Collectors.joining("|")));
}

return EMOJI_PATTERN;
}

Expand Down