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Code Issues Releases Wiki Activity

[core] Cache length in LazyStringBuilder

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This commit is contained in:
Florian Schmaus 2023-11-26 21:24:17 +01:00
parent 9203907e66
commit 70e48300a6
1 changed files with 8 additions and 3 deletions
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11
smack-core/src/main/java/org/jivesoftware/smack/util/LazyStringBuilder.java
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@ -1,6 +1,6 @@
/**
*
* Copyright 2014-2019 Florian Schmaus
* Copyright 2014-2023 Florian Schmaus
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@ -25,9 +25,11 @@ public class LazyStringBuilder implements Appendable, CharSequence {
private final List<CharSequence> list;
private String cache;
private int cachedLength = -1;
private void invalidateCache() {
cache = null;
cachedLength = -1;
}
public LazyStringBuilder() {
@ -65,9 +67,10 @@ public class LazyStringBuilder implements Appendable, CharSequence {
@Override
public int length() {
if (cache != null) {
return cache.length();
if (cachedLength >= 0) {
return cachedLength;
}
int length = 0;
try {
for (CharSequence csq : list) {
@ -78,6 +81,8 @@ public class LazyStringBuilder implements Appendable, CharSequence {
StringBuilder sb = safeToStringBuilder();
throw new RuntimeException("The following LazyStringBuilder threw a NullPointerException: " + sb, npe);
}
cachedLength = length;
return length;
}