Examples of org.apache.hadoop.hive.serde2.AbstractSerDe

org.apache.hadoop.hive.serde2.objectinspector.StructField
Abstract class for implementing SerDe. The abstract class has been created, so that new methods can be added in the underlying interface, SerDe, and only implementations that need those methods overwrite it.

  /**
   * Tests a writing a stripe with a stride dictionary, followed by a stripe without
   * followed by a stripe with.
   */
  public void testEmptyInStringDictionaryStream() throws Exception {
    ObjectInspector inspector;
    synchronized (TestOrcFile.class) {
      inspector = ObjectInspectorFactory.getReflectionObjectInspector
          (StringStruct.class,
              ObjectInspectorFactory.ObjectInspectorOptions.JAVA);
    }

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  /**
   * Tests a writing a stripe with a stride dictionary, followed by a stripe without
   * followed by a stripe with.
   */
  public void testEmptyInIntDictionaryStream() throws Exception {
    ObjectInspector inspector;
    synchronized (TestOrcFile.class) {
      inspector = ObjectInspectorFactory.getReflectionObjectInspector
          (IntStruct.class,
              ObjectInspectorFactory.ObjectInspectorOptions.JAVA);
    }

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   *
   * @throws Exception
   */
  @Test
  public void testSkipWithEmptyArrayInEnd() throws Exception {
    ObjectInspector inspector;
    List<String> emptyList = Collections.emptyList();
    synchronized (TestOrcFile.class) {
      inspector = ObjectInspectorFactory.getReflectionObjectInspector
          (StringListWithId.class, ObjectInspectorFactory.ObjectInspectorOptions.JAVA);
    }

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  /**
   * Tests a writing a stripe with an integer column, which enters low memory mode before the first
   * index stride is complete.
   */
  public void testIntEnterLowMemoryModeInFirstStride() throws Exception {
    ObjectInspector inspector;
    synchronized (TestOrcFile.class) {
      inspector = ObjectInspectorFactory.getReflectionObjectInspector
          (IntStruct.class,
              ObjectInspectorFactory.ObjectInspectorOptions.JAVA);
    }

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  /**
   * Tests a writing a stripe with a string column, which enters low memory mode before the first
   * index stride is complete.
   */
  public void testStringEnterLowMemoryModeInFirstStride() throws Exception {
    ObjectInspector inspector;
    synchronized (TestOrcFile.class) {
      inspector = ObjectInspectorFactory.getReflectionObjectInspector
          (StringStruct.class,
              ObjectInspectorFactory.ObjectInspectorOptions.JAVA);
    }

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    public void close(boolean b) throws IOException {
      // if we haven't written any rows, we need to create a file with a
      // generic schema.
      if (writer == null) {
        // a row with no columns
        ObjectInspector inspector = ObjectInspectorFactory.
            getStandardStructObjectInspector(new ArrayList<String>(),
                new ArrayList<ObjectInspector>());
        writer = OrcFile.createWriter(fs, path, this.conf, inspector,
            stripeSize, compress, compressionSize, rowIndexStride);
      }

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    checkOutput(expectedFileUrl.getPath(), outputFilename);
  }


  @Test
  public void testDump() throws Exception {
    ObjectInspector inspector;
    synchronized (TestOrcFile.class) {
      inspector = ObjectInspectorFactory.getReflectionObjectInspector
          (MyRecord.class, ObjectInspectorFactory.ObjectInspectorOptions.JAVA);
    }

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    writer.close();
    checkOutput("orc-file-dump.out");
  }


  private void testDictionary(Configuration conf, String expectedOutputFilename) throws Exception {
    ObjectInspector inspector;
    synchronized (TestOrcFile.class) {
      inspector = ObjectInspectorFactory.getReflectionObjectInspector
          (MyRecord.class, ObjectInspectorFactory.ObjectInspectorOptions.JAVA);
    }
    // Turn off using the approximate entropy heuristic to turn off dictionary encoding

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        return struct;
      }
    };


    // Test control case (cases match)
    StructField field = STRUCT_OI.getStructFieldRef(FIELD_0);
    Assert.assertEquals("a",
        ((StringObjectInspector) field.getFieldObjectInspector()).getPrimitiveJavaObject(
            STRUCT_OI.getStructFieldData(struct, field)));
    // Test upper case
    field = STRUCT_OI.getStructFieldRef(FIELD_0.toUpperCase());
    Assert.assertEquals("a",
        ((StringObjectInspector) field.getFieldObjectInspector()).getPrimitiveJavaObject(
            STRUCT_OI.getStructFieldData(struct, field)));
    // Test lower case (even if someone changes the value of FIELD_0 in the future either upper
    // or lower case should be different from the actual case)
    field = STRUCT_OI.getStructFieldRef(FIELD_0.toLowerCase());
    Assert.assertEquals("a",
        ((StringObjectInspector) field.getFieldObjectInspector()).getPrimitiveJavaObject(
            STRUCT_OI.getStructFieldData(struct, field)));
  }

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  public void testCaseInsensitiveFieldsStruct() throws Exception {
    OrcStruct struct = new OrcStruct(Lists.newArrayList(FIELD_0));
    struct.setFieldValue(0, new Text("a"));


    // Test control case (cases match)
    StructField field = NON_LAZY_STRUCT_OI.getStructFieldRef(FIELD_0);
    Assert.assertEquals("a",
        ((StringObjectInspector) field.getFieldObjectInspector()).getPrimitiveJavaObject(
            NON_LAZY_STRUCT_OI.getStructFieldData(struct, field)));
    // Test upper case
    field = NON_LAZY_STRUCT_OI.getStructFieldRef(FIELD_0.toUpperCase());
    Assert.assertEquals("a",
        ((StringObjectInspector) field.getFieldObjectInspector()).getPrimitiveJavaObject(
            NON_LAZY_STRUCT_OI.getStructFieldData(struct, field)));
    // Test lower case (even if someone changes the value of FIELD_0 in the future either upper
    // or lower case should be different from the actual case)
    field = NON_LAZY_STRUCT_OI.getStructFieldRef(FIELD_0.toLowerCase());
    Assert.assertEquals("a",
        ((StringObjectInspector) field.getFieldObjectInspector()).getPrimitiveJavaObject(
            NON_LAZY_STRUCT_OI.getStructFieldData(struct, field)));
  }

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