Examples of org.jboss.dna.sequencer.ddl.DdlTokenStream

org.jboss.dna.sequencer.ddl.DdlTokenStream
A TokenStream implementation designed around requirements for tokenizing and parsing DDL statements.
Because of the complexity of DDL, it was necessary to extend {@link TokenStream} in order to override the basic tokenizer totokenize the in-line comments prefixed with "--". In addition, because there is not a default ddl command (or statement) terminator, an override method was added to {@link TokenStream} to allow re-tokenizing the initial tokens to re-type thetokens, remove tokens, or any other operation to simplify parsing.

In this case, both reserved words (or key words) and statement start phrases can be registered prior to the {@link TokenStream}'s start() method. Any resulting tokens that match the registered string values will be re-typed to identify them as key words (DdlTokenizer.KEYWORD) or statement start phrases (DdlTokenizer.STATEMENT_KEY).

    public void beforeEach() {
      parser = new DataTypeParser();
    }
    
    private DdlTokenStream getTokens(String content) {
      DdlTokenStream tokens = new DdlTokenStream(content, DdlTokenStream.ddlTokenizer(false), false);
      
      tokens.start();
      
      return tokens;
    }

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    @Test
    public void shouldParseBracketedInteger() {
      printTest("shouldParseBracketedInteger()");
    String content = "(255)";
    DdlTokenStream tokens = getTokens(content);
    int value = parser.parseBracketedInteger(tokens, new DataType());
    
    Assert.assertEquals("DataType length is not correct", 255, value);
    }

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    @Test
    public void shouldParseKMGInteger() {
      printTest("shouldParseKMGInteger()");
    String content = "1000M";
    DdlTokenStream tokens = getTokens(content);
    
    int value = parser.parseInteger(tokens, new DataType());
    Assert.assertEquals("DataType length is not correct", 1000, value);
    
    content = "1000G";

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  public void shouldParseCHAR() {
    printTest("shouldParseCHAR()");
    String typeString = getDataTypeString(DataTypes.DTYPE_CHAR);
    String content = typeString;
    
    DdlTokenStream tokens = getTokens(content);
      
    DataType dType = parser.parse(tokens);
    
    Assert.assertNotNull("DataType was NOT found for Type = " + typeString, dType);
    Assert.assertEquals("Wrong DataType found", typeString, dType.getName());

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  public void shouldParseCHARACTER() {
    printTest("shouldParseCHARACTER()");
    String typeString = getDataTypeString(DataTypes.DTYPE_CHARACTER);
    String content = typeString;
    
    DdlTokenStream tokens = getTokens(content);
      
    DataType dType = parser.parse(tokens);
    
    Assert.assertNotNull("DataType was NOT found for Type = " + typeString, dType);
    Assert.assertEquals("Wrong DataType found", typeString, dType.getName());

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  public void shouldParseCHAR_VARYING() {
    printTest("shouldParseCHAR_VARYING()");
    String typeString = getDataTypeString(DataTypes.DTYPE_CHAR_VARYING);
    String content = typeString + " (255)";
    
    DdlTokenStream tokens = getTokens(content);
      
    DataType dType = parser.parse(tokens);
    
    Assert.assertNotNull("DataType was NOT found for Type = " + typeString, dType);
    Assert.assertEquals("Wrong DataType found", typeString, dType.getName());

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  public void shouldParseCHARACTER_VARYING() {
    printTest("shouldParseCHARACTER_VARYING()");
    String typeString = getDataTypeString(DataTypes.DTYPE_CHARACTER_VARYING);
    String content = typeString + " (255)";
    
    DdlTokenStream tokens = getTokens(content);
      
    DataType dType = parser.parse(tokens);
    
    Assert.assertNotNull("DataType was NOT found for Type = " + typeString, dType);
    Assert.assertEquals("Wrong DataType found", typeString, dType.getName());

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  public void shouldParseVARCHAR() {
    printTest("shouldParseVARCHAR()");
    String typeString = getDataTypeString(DataTypes.DTYPE_VARCHAR);
    String content = typeString + " (255)";
    
    DdlTokenStream tokens = getTokens(content);
      
    DataType dType = parser.parse(tokens);
    
    Assert.assertNotNull("DataType was NOT found for Type = " + typeString, dType);
    Assert.assertEquals("Wrong DataType found", typeString, dType.getName());

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  public void shouldParseNATIONAL_CHAR() {
    printTest("shouldParseNATIONAL_CHAR()");
    String typeString = getDataTypeString(DataTypes.DTYPE_NATIONAL_CHAR);
    String content = typeString;
    
    DdlTokenStream tokens = getTokens(content);
      
    DataType dType = parser.parse(tokens);
    
    Assert.assertNotNull("DataType was NOT found for Type = " + typeString, dType);
    Assert.assertEquals("Wrong DataType found", typeString, dType.getName());

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  public void shouldParseNATIONAL_CHARACTER() {
    printTest("shouldParseNATIONAL_CHARACTER()");
    String typeString = getDataTypeString(DataTypes.DTYPE_NATIONAL_CHARACTER);
    String content = typeString;
    
    DdlTokenStream tokens = getTokens(content);
      
    DataType dType = parser.parse(tokens);
    
    Assert.assertNotNull("DataType was NOT found for Type = " + typeString, dType);
    Assert.assertEquals("Wrong DataType found", typeString, dType.getName());

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