initial commit

sql/core/src/main/java/org/apache/spark/sql/execution/BufferedRowIterator.java

@@ -65,7 +65,7 @@ public long durationMs() {
   /**
    * Append a row to currentRows.
    */
-  protected void append(InternalRow row) {
+  public void append(InternalRow row) {
     currentRows.add(row);
   }
 
@@ -75,7 +75,7 @@ protected void append(InternalRow row) {
    * If it returns true, the caller should exit the loop that [[InputAdapter]] generates.
    * This interface is mainly used to limit the number of input rows.
    */
-  protected boolean stopEarly() {
+  public boolean stopEarly() {
     return false;
   }
 
@@ -84,14 +84,14 @@ protected boolean stopEarly() {
    *
    * If it returns true, the caller should exit the loop (return from processNext()).
    */
-  protected boolean shouldStop() {
+  public boolean shouldStop() {
     return !currentRows.isEmpty();
   }
 
   /**
    * Increase the peak execution memory for current task.
    */
-  protected void incPeakExecutionMemory(long size) {
+  public void incPeakExecutionMemory(long size) {
     TaskContext.get().taskMetrics().incPeakExecutionMemory(size);
   }