Examples of eu.stratosphere.types.StringValue

eu.stratosphere.types.StringValue
Mutable string data type that implements the Key interface. StringValue encapsulates the basic functionality of a {@link String}, in a serializable and mutable way.
The mutability allows to reuse the object inside the user code, also across invocations. Reusing a StringValue object helps to increase the performance, as string objects are rather heavy-weight objects and incur a lot of garbage collection overhead, if created and destroyed in masses. @see eu.stratosphere.types.Key @see eu.stratosphere.types.NormalizableKey @see java.lang.String @see java.lang.CharSequence


public class SimpleStringUtilsTest {


  @Test
  public void testToLowerCaseConverting() {
    StringValue testString = new StringValue("TEST");
    SimpleStringUtils.toLowerCase(testString);
    assertEquals(new StringValue("test"), testString);
  }

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    assertEquals(new StringValue("test"), testString);
  }
  
  @Test
  public void testReplaceNonWordChars() {
    StringValue testString = new StringValue("TEST123_@");
    SimpleStringUtils.replaceNonWordChars(testString, '!');
    assertEquals(new StringValue("TEST123_!"), testString);
  }

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    assertEquals(new StringValue("TEST123_!"), testString);
  }
  
  @Test
  public void testTokenizerOnStringWithoutNexToken() {
    StringValue testString = new StringValue("test");
    SimpleStringUtils.WhitespaceTokenizer tokenizer = new WhitespaceTokenizer();
    tokenizer.setStringToTokenize(testString);
    //first token
    tokenizer.next(testString);
    //next token is not exist

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    assertFalse(tokenizer.next(testString));
  }
  
  @Test
  public void testTokenizerOnStringWithNexToken() {
    StringValue testString = new StringValue("test test");
    SimpleStringUtils.WhitespaceTokenizer tokenizer = new WhitespaceTokenizer();
    tokenizer.setStringToTokenize(testString);
    assertTrue(tokenizer.next(testString));
  }

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    assertTrue(tokenizer.next(testString));
  }
  
  @Test
  public void testTokenizerOnStringOnlyWithDelimiter() {
    StringValue testString = new StringValue("    ");
    SimpleStringUtils.WhitespaceTokenizer tokenizer = new WhitespaceTokenizer();
    tokenizer.setStringToTokenize(testString);
    assertFalse(tokenizer.next(testString));
  }

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      format.setFieldTypesGeneric(StringValue.class, IntValue.class, StringValue.class, IntValue.class);
      
      format.configure(parameters);
      format.open(split);
      
      Value[] values = new Value[] { new StringValue(), new IntValue(), new StringValue(), new IntValue() };
      
      assertNotNull(format.nextRecord(values));
      
      try {
        format.nextRecord(values);

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      format.setLenient(true);
      
      format.configure(parameters);
      format.open(split);
      
      Value[] values = new Value[] { new StringValue(), new IntValue(), new StringValue(), new IntValue() };
      
      assertNotNull(format.nextRecord(values));
      assertNull(format.nextRecord(values));
    }
    catch (Exception ex) {

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      format.setLenient(true);
      
      format.configure(parameters);
      format.open(split);
      
      Value[] values = new Value[] { new StringValue(), new IntValue()};
      
      assertNotNull(format.nextRecord(values));
      assertNull(format.nextRecord(values));
      assertNull(format.nextRecord(values));
      assertNotNull(format.nextRecord(values));

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      format.setFieldTypesGeneric(StringValue.class, StringValue.class, StringValue.class);
      
      format.configure(parameters);
      format.open(split);
      
      Value[] values = new Value[] { new StringValue(), new StringValue(), new StringValue()};
      
      values = format.nextRecord(values);
      assertNotNull(values);
      assertEquals("abc", ((StringValue) values[0]).getValue());
      assertEquals("def", ((StringValue) values[1]).getValue());

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      format.setSkipFirstLineAsHeader(true);
      
      format.configure(parameters);
      format.open(split);
      
      Value[] values = new Value[] { new IntValue(), new StringValue(), new IntValue(), new StringValue()};
      
      // first line is skipped as header
      assertNotNull(format.nextRecord(values));   //  first row (= second line)
      assertNotNull(format.nextRecord(values));   // second row (= third line) 
      assertNull(format.nextRecord(values));  // exhausted

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