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