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Fix #214

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This commit is contained in:
Prototik 2015-10-22 14:25:47 +07:00
parent ad909f2788
commit 4cfa07d415
1 changed files with 16 additions and 20 deletions
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36
src/main/java/kcauldron/wrapper/LinkedHelper.java
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@ -5,29 +5,27 @@ import java.util.List;
import java.util.ListIterator;
public class LinkedHelper<T> {
private Iterable<T> mIterable;
private Iterator<T> mIterator;
private int iteratorIndex;
private T indexValue;
private final Iterable<T> mIterable;
private volatile Iterator<T> mIndexIterator;
private volatile int mIndex;
private volatile T mIndexValue;
public LinkedHelper(Iterable<T> iterable) {
mIterable = iterable;
}
public T get(int index) {
if (iteratorIndex > index || mIterator == null) {
mIterator = mIterable.iterator();
iteratorIndex = -1;
public synchronized T get(int index) {
if (mIndexIterator == null || mIndex > index) {
mIndexIterator = mIterable.iterator();
mIndex = -1;
}
while (iteratorIndex < index) {
if (mIterator.hasNext()) {
indexValue = mIterator.next();
iteratorIndex++;
} else {
throw new IndexOutOfBoundsException();
}
if (mIndex == index) return mIndexValue;
T value = null;
while (mIndex < index) {
value = mIndexIterator.next();
mIndex++;
}
return indexValue;
return mIndexValue = value;
}
public int indexOf(Object o) {
@ -43,7 +41,6 @@ public class LinkedHelper<T> {
public int lastIndexOf(Object o) {
if (!(mIterable instanceof List)) {
throw new UnsupportedOperationException();
}
ListIterator<T> iterator = ((List<T>) mIterable).listIterator();
int i = 0;
@ -114,7 +111,7 @@ public class LinkedHelper<T> {
@Override
public int nextIndex() {
return mNextIndex;
return mListIterator != null ? mListIterator.nextIndex() : mNextIndex;
}
@Override
@ -131,8 +128,7 @@ public class LinkedHelper<T> {
@Override
public void remove() {
ensureListIterator();
mListIterator.remove();
mIterator.remove();
}
@Override