Skip to content

Fix #3 ArrayIndexOutOfBoundsException #4

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
Glavo merged 2 commits into from
Jun 11, 2026
Merged

Fix #3 ArrayIndexOutOfBoundsException #4

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
9d23b5e
Fix #3 throwing ArrayIndexOutOfBoundsException when removing elements…
Taskeren Jun 7, 2026
87c128c
Fix
Taskeren Jun 11, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
5 changes: 3 additions & 2 deletions src/main/java/org/glavo/nbt/tag/ParentTag.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -95,7 +95,8 @@ final void ensureTagsCapacityForAdd() {

int arrayEnd = Math.min(size, tags.length);
if (index < arrayEnd - 1) {
System.arraycopy(tags, index + 1, tags, index, size - index);
System.arraycopy(tags, index + 1, tags, index, arrayEnd - index - 1);
tags[arrayEnd - 1] = null;
} else if (oldTag != null) {
tags[index] = null;
}
Expand Down Expand Up @@ -179,7 +180,7 @@ final void moveTagToLast(T tag) {
/// If the `tag` is already a child of another tag, removes it from old parent and adds it to this tag.
@Contract(value = "_ -> this", mutates = "this,param1")
public abstract ParentTag<T> addTag(@Flow(targetIsContainer = true)
T tag) throws IllegalArgumentException;
T tag) throws IllegalArgumentException;

/// Adds all `tags` to this tag.
///
Expand Down
46 changes: 46 additions & 0 deletions src/test/java/org/glavo/nbt/tag/ListTagTest.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,7 @@
*/
package org.glavo.nbt.tag;

import org.glavo.nbt.internal.ArrayAccessor;
import org.junit.jupiter.api.Test;

import java.util.function.Supplier;
Expand Down Expand Up @@ -238,4 +239,49 @@ void testCloneEqualsAndIndependentChildren() {
assertEquals("changed", cloneFirst.get());
assertContentNotEquals(tag, clone);
}

@Test
void testRemoveAt() {
ListTag<IntTag> list = new ListTag<>();
for (int i = 0; i < 9; i++) {
list.addTag(new IntTag(i));
}
assertEquals(new IntTag(6), list.removeTagAt(6));
assertEquals(8, list.size());
assertArrayEquals(new IntTag[]{
new IntTag(0), new IntTag(1), new IntTag(2),
new IntTag(3), new IntTag(4), new IntTag(5),
new IntTag(7), new IntTag(8), null,
null, null, null}, list.tags);
}

@Test
void testRemoveAtCapacity() {
ListTag<IntTag> list = new ListTag<>();
for (int i = 0; i < ArrayAccessor.DEFAULT_CAPACITY; i++) {
list.addTag(new IntTag(i));
}
assertEquals(new IntTag(6), list.removeTagAt(6));
assertEquals(ArrayAccessor.DEFAULT_CAPACITY - 1, list.size());
assertArrayEquals(new IntTag[]{
new IntTag(0), new IntTag(1), new IntTag(2),
new IntTag(3), new IntTag(4), new IntTag(5),
new IntTag(7), new IntTag(8), new IntTag(9),
new IntTag(10), new IntTag(11), null}, list.tags);
}

@Test
void testRemoveAtEnd() {
ListTag<IntTag> list = new ListTag<>();
for (int i = 0; i < ArrayAccessor.DEFAULT_CAPACITY; i++) {
list.addTag(new IntTag(i));
}
assertEquals(new IntTag(11), list.removeTagAt(11));
assertEquals(ArrayAccessor.DEFAULT_CAPACITY - 1, list.size());
assertArrayEquals(new IntTag[]{
new IntTag(0), new IntTag(1), new IntTag(2),
new IntTag(3), new IntTag(4), new IntTag(5),
new IntTag(6), new IntTag(7), new IntTag(8),
new IntTag(9), new IntTag(10), null}, list.tags);
}
}
Loading