linxt20 commented on code in PR #12077:
URL: https://github.com/apache/iotdb/pull/12077#discussion_r1501970796
##########
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/schemaengine/schemaregion/mtree/impl/pbtree/mnode/container/CachedMNodeContainer.java:
##########
@@ -425,6 +426,73 @@ private boolean changeStatus() {
}
}
+ private class BufferIterator implements Iterator<ICachedMNode> {
+ Iterator<ICachedMNode> newChildBufferIterator;
+ Iterator<ICachedMNode> updateChildBufferIterator;
+
+ ICachedMNode newChildBufferHeader;
+ ICachedMNode updateChildBufferHeader;
+
+ BufferIterator() {
+ newChildBufferIterator =
getNewChildBuffer().getMNodeChildBufferIterator();
+ updateChildBufferIterator =
getUpdatedChildBuffer().getMNodeChildBufferIterator();
+ newChildBufferHeader =
+ newChildBufferIterator.hasNext() ? newChildBufferIterator.next() :
null;
+ updateChildBufferHeader =
+ updateChildBufferIterator.hasNext() ?
updateChildBufferIterator.next() : null;
+ }
+
+ @Override
+ public boolean hasNext() {
+ return newChildBufferHeader != null || updateChildBufferHeader != null;
+ }
+
+ @Override
+ public ICachedMNode next() {
+ if (!hasNext()) {
+ throw new NoSuchElementException();
+ }
+ return tryGeyNext();
+ }
+
+ private ICachedMNode tryGeyNext() {
+ if (newChildBufferHeader != null && updateChildBufferHeader != null) {
+ if
(newChildBufferHeader.getName().compareTo(updateChildBufferHeader.getName()) <
0) {
+ ICachedMNode ansMNode = newChildBufferHeader;
+ newChildBufferHeader =
+ newChildBufferIterator.hasNext() ? newChildBufferIterator.next()
: null;
+ return ansMNode;
+ } else if
(newChildBufferHeader.getName().compareTo(updateChildBufferHeader.getName())
+ > 0) {
+ ICachedMNode ansMNode = updateChildBufferHeader;
+ updateChildBufferHeader =
+ updateChildBufferIterator.hasNext() ?
updateChildBufferIterator.next() : null;
+ return ansMNode;
+ } else {
+ ICachedMNode ansMNode = updateChildBufferHeader;
Review Comment:
throw ILegalStateException
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