Re: [PR] [format] Introduce lance file format [paimon]

["neuyilan (via GitHub)" <gi...@apache.org>]

neuyilan commented on code in PR #5809:
URL: https://github.com/apache/paimon/pull/5809#discussion_r2181352062


##########
paimon-format/src/main/java/org/apache/paimon/format/lance/LanceRecordsWriter.java:
##########
@@ -0,0 +1,111 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.paimon.format.lance;
+
+import org.apache.paimon.arrow.ArrowBundleRecords;
+import org.apache.paimon.arrow.vector.ArrowFormatCWriter;
+import org.apache.paimon.data.InternalRow;
+import org.apache.paimon.format.BundleFormatWriter;
+import org.apache.paimon.format.lance.jni.LanceWriter;
+import org.apache.paimon.io.BundleRecords;
+
+import org.apache.arrow.vector.VectorSchemaRoot;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+
+/** Lance records writer. */
+public class LanceRecordsWriter implements BundleFormatWriter {
+
+    private static final Logger LOG = LoggerFactory.getLogger(LanceRecordsWriter.class);
+
+    protected final WrittenPosition writtenPosition;
+    protected final LanceWriter nativeWriter;
+
+    private final ArrowFormatCWriter arrowFormatWriter;
+
+    private long jniCost = 0;
+
+    public LanceRecordsWriter(
+            WrittenPosition writtenPosition,
+            ArrowFormatCWriter arrowFormatWriter,
+            LanceWriter nativeWriter) {
+        this.writtenPosition = writtenPosition;
+        this.arrowFormatWriter = arrowFormatWriter;
+        this.nativeWriter = nativeWriter;
+    }
+
+    @Override
+    public void addElement(InternalRow internalRow) throws IOException {
+        if (!arrowFormatWriter.write(internalRow)) {
+            flush();
+            if (!arrowFormatWriter.write(internalRow)) {
+                throw new RuntimeException("Exception happens while write to orc file");

Review Comment:
   orc file -> lance file？



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