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Subject [GitHub] [drill] arina-ielchiieva commented on a change in pull request #1962: DRILL-7554: Convert LTSV Format Plugin to EVF
Date Tue, 04 Feb 2020 09:57:05 GMT
arina-ielchiieva commented on a change in pull request #1962: DRILL-7554: Convert LTSV Format
Plugin to EVF
URL: https://github.com/apache/drill/pull/1962#discussion_r374572872
 
 

 ##########
 File path: contrib/format-ltsv/src/main/java/org/apache/drill/exec/store/ltsv/LTSVRecordIterator.java
 ##########
 @@ -0,0 +1,127 @@
+/*
+ * 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.drill.exec.store.ltsv;
+
+import org.apache.drill.common.exceptions.UserException;
+import org.apache.drill.common.types.TypeProtos;
+import org.apache.drill.exec.physical.resultSet.RowSetLoader;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.util.Iterator;
+
+public class LTSVRecordIterator implements Iterator {
+
+  private static final Logger logger = LoggerFactory.getLogger(LTSVRecordIterator.class);
+
+  private RowSetLoader rowWriter;
+
+  private BufferedReader reader;
+
+  private String line;
+
+  private int recordCount;
+
+  public LTSVRecordIterator(RowSetLoader rowWriter, BufferedReader reader) {
+    this.rowWriter = rowWriter;
+    this.reader = reader;
+
+    // Get the first line
+    try {
+      line = reader.readLine();
+    } catch (IOException e) {
+      throw UserException
+        .dataReadError()
+        .message("Error reading LTSV Data: {}", e.getMessage())
+        .build(logger);
+    }
+  }
+
+  @Override
+  public boolean hasNext() {
+    return line != null;
+  }
+
+  @Override
+  public Boolean next() {
+    // Skip empty lines
+    if (line.trim().length() == 0) {
+      try {
+        // Advance the line to the next line
+        line = reader.readLine();
+      } catch (IOException e) {
+        throw UserException
+          .dataReadError()
+          .message("Error reading LTSV Data: {}", e.getMessage())
+          .build(logger);
+      }
+      return Boolean.TRUE;
+    } else if (line == null) {
+      return Boolean.FALSE;
+    }
+
+    // Process the row
+    processRow();
+
+    // Increment record counter
+    recordCount++;
+
+    // Get the next line
+    try {
+      line = reader.readLine();
+      if(line == null) {
+        return Boolean.FALSE;
+      }
+    } catch (IOException e) {
+      throw UserException
+        .dataReadError()
+        .message("Error reading LTSV Data: {}", e.getMessage())
 
 Review comment:
   The same here.

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