[jira] [Work logged] (HIVE-20447) Add JSON Outputformat support

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-20447?focusedWorklogId=453404&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-453404 ]

ASF GitHub Bot logged work on HIVE-20447:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 01/Jul/20 12:54
            Start Date: 01/Jul/20 12:54
    Worklog Time Spent: 10m 
      Work Description: belugabehr commented on a change in pull request #1169:
URL: https://github.com/apache/hive/pull/1169#discussion_r448341358



##########
File path: pom.xml
##########
@@ -1486,6 +1486,7 @@
       <exclude>**/patchprocess/**</exclude>
       <exclude>**/metastore_db/**</exclude>
       <exclude>**/test/resources/**/*.ldif</exclude>
+      <exclude>.vscode/**</exclude>

Review comment:
       Since this has nothing to do with JSON formatting in beeline, save it for another JIRA.

##########
File path: beeline/src/test/org/apache/hive/beeline/TestJSONOutputFormat.java
##########
@@ -0,0 +1,137 @@
+/*
+ * 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.hive.beeline;
+
+import static org.mockito.ArgumentMatchers.anyInt;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
+
+import java.io.PrintStream;
+import java.sql.ResultSet;
+import java.sql.ResultSetMetaData;
+import java.sql.SQLException;
+import java.sql.Types;
+import java.util.ArrayList;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+public class TestJSONOutputFormat {
+
+  private final Object[][] mockRowData = {
+      {"aaa", true, null, Double.valueOf(3.14), "\\/\b\f\n\r\t"}
+  };
+  private TestJSONOutputFormat.BeelineMock mockBeeline;
+  private ResultSet mockResultSet;
+  private MockRow mockRow;
+
+  @Before
+  public void setupMockData() throws SQLException {
+    mockBeeline = new TestJSONOutputFormat.BeelineMock();
+    mockResultSet = mock(ResultSet.class);
+
+    ResultSetMetaData mockResultSetMetaData = mock(ResultSetMetaData.class);
+    when(mockResultSetMetaData.getColumnCount()).thenReturn(5);
+    when(mockResultSetMetaData.getColumnLabel(1)).thenReturn("string");
+    when(mockResultSetMetaData.getColumnLabel(2)).thenReturn("boolean");
+    when(mockResultSetMetaData.getColumnLabel(3)).thenReturn("null");
+    when(mockResultSetMetaData.getColumnLabel(4)).thenReturn("double");
+    when(mockResultSetMetaData.getColumnLabel(5)).thenReturn("special symbols");
+    when(mockResultSetMetaData.getColumnType(1)).thenReturn(Types.VARCHAR);
+    when(mockResultSetMetaData.getColumnType(2)).thenReturn(Types.BOOLEAN);
+    when(mockResultSetMetaData.getColumnType(3)).thenReturn(Types.NULL);
+    when(mockResultSetMetaData.getColumnType(4)).thenReturn(Types.DOUBLE);
+    when(mockResultSetMetaData.getColumnType(5)).thenReturn(Types.VARCHAR);
+    when(mockResultSet.getMetaData()).thenReturn(mockResultSetMetaData);
+
+    mockRow = new MockRow();
+    // returns true as long as there is more data in mockResultData array
+    when(mockResultSet.next()).thenAnswer(new Answer<Boolean>() {
+      private int mockRowDataIndex = 0;
+
+      @Override
+      public Boolean answer(final InvocationOnMock invocation) {
+        if (mockRowDataIndex < mockRowData.length) {
+          mockRow.setCurrentRowData(mockRowData[mockRowDataIndex]);
+          mockRowDataIndex++;
+          return true;
+        } else {
+          return false;
+        }
+      }
+    });
+
+    when(mockResultSet.getObject(anyInt())).thenAnswer(new Answer<Object>() {
+      @Override
+      public Object answer(final InvocationOnMock invocation) {
+        Object[] args = invocation.getArguments();
+        int index = ((Integer) args[0]);
+        return mockRow.getColumn(index);
+      }
+    });
+  }
+
+  /**
+   * Test printing output data with JsonOutputFormat
+   */
+  @Test
+  public final void testPrint() throws SQLException {
+    setupMockData();
+    BufferedRows bfRows = new BufferedRows(mockBeeline, mockResultSet);
+    JSONOutputFormat instance = new JSONOutputFormat(mockBeeline);
+    instance.print(bfRows);
+    ArrayList<String> actualOutput = mockBeeline.getLines();
+    ArrayList<String> expectedOutput = new ArrayList<>(6);
+    expectedOutput.add("{\"resultset\":[");
+    expectedOutput.add("{\"string\":\"aaa\"," + "\"boolean\":true," + "\"null\":null," + "\"double\":3.14,"
+        + "\"special symbols\":\"\\\\\\/\\b\\f\\n\\r\\t\"}");
+    expectedOutput.add("]}");
+    assertArrayEquals(expectedOutput.toArray(), actualOutput.toArray());
+  }
+
+  public class BeelineMock extends BeeLine {
+
+    private ArrayList<String> lines = new ArrayList<>();
+
+    @Override
+    final void output(final ColorBuffer msg, boolean newline, PrintStream out) {
+      lines.add(msg.getMono());
+      super.output(msg, newline, out);
+    }
+
+    private ArrayList<String> getLines() {
+      return lines;
+    }
+  }
+
+  static class MockRow {
+    Object[] rowData;
+
+    public void setCurrentRowData(Object[] rowData) {
+      this.rowData = rowData;
+    }
+
+    public Object getColumn(int idx) {
+      return rowData[idx - 1];
+    }
+  }
+}

Review comment:
       Add a new line to end of file

##########
File path: beeline/src/java/org/apache/hive/beeline/JSONOutputFormat.java
##########
@@ -0,0 +1,108 @@
+/*
+ * 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.
+ */
+
+/*
+ * This source file is based on code taken from SQLLine 1.9
+ * See SQLLine notice in LICENSE
+ */
+package org.apache.hive.beeline;
+
+import java.sql.SQLException;
+import java.sql.Types;
+
+import com.fasterxml.jackson.core.io.JsonStringEncoder;
+
+/**
+ * OutputFormat for standard JSON format.
+ *
+ */ 
+public class JSONOutputFormat extends AbstractOutputFormat {
+  private final BeeLine beeLine;
+  private int[] columnTypes;
+  private JsonStringEncoder jse = JsonStringEncoder.getInstance();

Review comment:
       Take a look at this:
   
   https://fasterxml.github.io/jackson-core/javadoc/2.8/com/fasterxml/jackson/core/JsonGenerator.html
   
   Please use the Jackson JSON generator to... generate JSON. :)

##########
File path: .gitignore
##########
@@ -38,3 +38,4 @@ standalone-metastore/metastore-server/src/gen/version
 launch.json
 settings.json
 kafka-handler/src/test/gen
+.vscode/

Review comment:
       Add this in a separate JIRA




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Issue Time Tracking
-------------------

    Worklog Id:     (was: 453404)
    Time Spent: 1h 20m  (was: 1h 10m)

> Add JSON Outputformat support
> -----------------------------
>
>                 Key: HIVE-20447
>                 URL: https://issues.apache.org/jira/browse/HIVE-20447
>             Project: Hive
>          Issue Type: Task
>          Components: Beeline
>            Reporter: Max Efremov
>            Assignee: Hunter Logan
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: HIVE-20447.01.patch
>
>          Time Spent: 1h 20m
>  Remaining Estimate: 0h
>
> This function is present in SQLLine. We need add it to beeline too.
> https://github.com/julianhyde/sqlline/pull/84



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