Examples of edu.buffalo.cse.ir.wikiindexer.tokenizer.TokenStream.mergeWithPrevious()

Package edu.buffalo.cse.ir.wikiindexer.tokenizer

Class edu.buffalo.cse.ir.wikiindexer.tokenizer.TokenStream

Examples of edu.buffalo.cse.ir.wikiindexer.tokenizer.TokenStream.mergeWithPrevious()

edu.buffalo.cse.ir.wikiindexer.tokenizer.TokenStream.mergeWithPrevious()
Method to merge the current token with the previous token, assumes whitespace separator between tokens when merged. The token iterator should now point to the newly merged token (i.e. the previous one) @return true if the merge succeeded, false otherwise

    stream = null;
    
    //previous is null
    stream = new TokenStream("this");
    stream.append("is","a","test","stream");
    assertFalse(stream.mergeWithPrevious());
    
    //proper merge
    stream.seekEnd();
    stream.previous();
    assertTrue(stream.mergeWithPrevious());

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    assertFalse(stream.mergeWithPrevious());
    
    //proper merge
    stream.seekEnd();
    stream.previous();
    assertTrue(stream.mergeWithPrevious());
    assertEquals("test stream", stream.next());
    assertEquals(4, stream.getAllTokens().size());
    stream = null;
    
    //full merge - reverse

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    //full merge - reverse
    stream = new TokenStream("this");
    stream.append("is","a","test","stream");
    stream.seekEnd();
    stream.previous();
    assertTrue(stream.mergeWithPrevious());
    assertEquals("test stream", stream.next());
    stream.previous();
    assertTrue(stream.mergeWithPrevious());
    assertEquals("a test stream", stream.next());
    stream.previous();

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    stream.seekEnd();
    stream.previous();
    assertTrue(stream.mergeWithPrevious());
    assertEquals("test stream", stream.next());
    stream.previous();
    assertTrue(stream.mergeWithPrevious());
    assertEquals("a test stream", stream.next());
    stream.previous();
    assertTrue(stream.mergeWithPrevious());
    assertEquals("is a test stream", stream.next());
    stream.previous();

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    assertEquals("test stream", stream.next());
    stream.previous();
    assertTrue(stream.mergeWithPrevious());
    assertEquals("a test stream", stream.next());
    stream.previous();
    assertTrue(stream.mergeWithPrevious());
    assertEquals("is a test stream", stream.next());
    stream.previous();
    assertTrue(stream.mergeWithPrevious());
    assertEquals("this is a test stream", stream.next());
    stream.previous();

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    assertEquals("a test stream", stream.next());
    stream.previous();
    assertTrue(stream.mergeWithPrevious());
    assertEquals("is a test stream", stream.next());
    stream.previous();
    assertTrue(stream.mergeWithPrevious());
    assertEquals("this is a test stream", stream.next());
    stream.previous();
    assertFalse(stream.mergeWithPrevious());
    stream = null;

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    assertEquals("is a test stream", stream.next());
    stream.previous();
    assertTrue(stream.mergeWithPrevious());
    assertEquals("this is a test stream", stream.next());
    stream.previous();
    assertFalse(stream.mergeWithPrevious());
    stream = null;
    
    //full merge - forward
    stream = new TokenStream("this");
    stream.append("is","a","test","stream");

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    //full merge - forward
    stream = new TokenStream("this");
    stream.append("is","a","test","stream");
    stream.next();
    assertTrue(stream.mergeWithPrevious());
    assertEquals("this is", stream.next());
    assertTrue(stream.mergeWithPrevious());
    assertEquals("this is a", stream.next());
    assertTrue(stream.mergeWithPrevious());
    assertEquals("this is a test", stream.next());

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    stream = new TokenStream("this");
    stream.append("is","a","test","stream");
    stream.next();
    assertTrue(stream.mergeWithPrevious());
    assertEquals("this is", stream.next());
    assertTrue(stream.mergeWithPrevious());
    assertEquals("this is a", stream.next());
    assertTrue(stream.mergeWithPrevious());
    assertEquals("this is a test", stream.next());
    assertTrue(stream.mergeWithPrevious());
    assertEquals("this is a test stream", stream.next());

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    stream.next();
    assertTrue(stream.mergeWithPrevious());
    assertEquals("this is", stream.next());
    assertTrue(stream.mergeWithPrevious());
    assertEquals("this is a", stream.next());
    assertTrue(stream.mergeWithPrevious());
    assertEquals("this is a test", stream.next());
    assertTrue(stream.mergeWithPrevious());
    assertEquals("this is a test stream", stream.next());
    assertFalse(stream.mergeWithPrevious());
    stream = null;

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