Examples with TwitterTokenStream com.twitter.common.text.token.TwitterTokenStream used on opensource projects

Example 1 with TwitterTokenStream

use of com.twitter.common.text.token.TwitterTokenStream in project commons by twitter.

the class TokenizerUsageExample method main.

public static void main(String[] args) {
    // This is the canonical way to create a token stream.
    DefaultTextTokenizer tokenizer = new DefaultTextTokenizer.Builder().setKeepPunctuation(true).build();
    TwitterTokenStream stream = tokenizer.getDefaultTokenStream();
    // We're going to ask the token stream what type of attributes it makes available. "Attributes"
    // can be understood as "annotations" on the original text.
    System.out.println("Attributes available:");
    Iterator<Class<? extends Attribute>> iter = stream.getAttributeClassesIterator();
    while (iter.hasNext()) {
        Class<? extends Attribute> c = iter.next();
        System.out.println(" - " + c.getCanonicalName());
    }
    System.out.println("");
    // We're now going to iterate through a few tweets and tokenize each in turn.
    for (String tweet : famousTweets) {
        // We're first going to demonstrate the "token-by-token" method of consuming tweets.
        System.out.println("Processing: " + tweet);
        // Reset the token stream to process new input.
        stream.reset(tweet);
        // Now we're going to consume tokens from the stream.
        int tokenCnt = 0;
        while (stream.incrementToken()) {
            // CharSequenceTermAttribute holds the actual token text. This is preferred over
            // TermAttribute because it avoids creating new String objects.
            CharSequenceTermAttribute termAttribute = stream.getAttribute(CharSequenceTermAttribute.class);
            // TokenTypeAttribute holds, as you'd expect, the type of the token.
            TokenTypeAttribute typeAttribute = stream.getAttribute(TokenTypeAttribute.class);
            System.out.println(String.format("token %2d (%3d, %3d) type: %12s, token: '%s'", tokenCnt, termAttribute.getOffset(), termAttribute.getLength() - termAttribute.getOffset(), typeAttribute.getType().name, termAttribute.getTermCharSequence()));
            tokenCnt++;
        }
        System.out.println("");
        // We're now going to demonstrate the TokenizedCharSequence API.
        // This should produce exactly the same result as above.
        tokenCnt = 0;
        System.out.println("Processing: " + tweet);
        TokenizedCharSequence tokSeq = tokenizer.tokenize(tweet);
        for (Token tok : tokSeq.getTokens()) {
            System.out.println(String.format("token %2d (%3d, %3d) type: %12s, token: '%s'", tokenCnt, tok.getOffset(), tok.getOffset() + tok.getLength(), tok.getType().name, tok.getTerm()));
            tokenCnt++;
        }
        System.out.println("");
    }
}

Example 2 with TwitterTokenStream

use of com.twitter.common.text.token.TwitterTokenStream in project commons by twitter.

the class TextTokenizer method tokenizeToStrings.

/**
 * Tokenizes a {@code CharSequence} into a list of Strings.
 *
 * @param input text to be tokenized
 * @return a list of tokens as String objects
 */
public List<String> tokenizeToStrings(CharSequence input) {
    Preconditions.checkNotNull(input);
    TwitterTokenStream tokenizer = getDefaultTokenStream();
    tokenizer.reset(input);
    return tokenizer.toStringList();
}

Example 3 with TwitterTokenStream

use of com.twitter.common.text.token.TwitterTokenStream in project commons by twitter.

the class TokenStreamSerializerTest method testIncompatibleStreams.

@Test
public void testIncompatibleStreams() throws Exception {
    final String text = "Test that incompatible streams are - actually -incompatible.";
    TextTokenizer tokenizer = new DefaultTextTokenizer.Builder().setKeepPunctuation(false).build();
    TwitterTokenStream stream = tokenizer.getDefaultTokenStream();
    stream.reset(text);
    TokenStreamSerializer serializer = TokenStreamSerializer.builder().add(new CharSequenceTermAttributeSerializer()).add(new TokenTypeAttributeSerializer()).add(new PositionIncrementAttributeSerializer()).build();
    byte[] data = serializer.serialize(stream);
    // Notice that I just flipped two serializers.
    TokenStreamSerializer incompatibleSerializer = TokenStreamSerializer.builder().add(new CharSequenceTermAttributeSerializer()).add(new PositionIncrementAttributeSerializer()).add(new TokenTypeAttributeSerializer()).build();
    boolean exceptionWasThrown = false;
    try {
        incompatibleSerializer.deserialize(data, text);
    } catch (TokenStreamSerializer.VersionMismatchException e) {
        exceptionWasThrown = true;
    }
    assertTrue("The expected exception was not thrown!", exceptionWasThrown);
}

Example 4 with TwitterTokenStream

use of com.twitter.common.text.token.TwitterTokenStream in project commons by twitter.

the class PunctuationExceptionCombinerTest method testPunctuationExceptions.

@Test
public void testPunctuationExceptions() {
    TwitterTokenStream stream = new PunctuationExceptionCombiner.Builder(tokenized).build();
    stream.reset("I .. exceptions!! ");
    assertEquals(ImmutableList.of("I", ".", ".", "exceptions", "!", "!"), stream.toStringList());
    stream.reset("I ♥♥ exceptions");
    assertEquals(ImmutableList.of("I", "♥♥", "exceptions"), stream.toStringList());
    stream.reset("I .♥♥. exceptions");
    assertEquals(ImmutableList.of("I", ".", "♥♥", ".", "exceptions"), stream.toStringList());
}

Example 5 with TwitterTokenStream

use of com.twitter.common.text.token.TwitterTokenStream in project commons by twitter.

the class PunctuationExceptionCombinerTest method testPunctuationFilterDoesNotRemoveExceptionChars.

@Test
public void testPunctuationFilterDoesNotRemoveExceptionChars() {
    TwitterTokenStream stream = new PunctuationFilter(new PunctuationExceptionCombiner.Builder(tokenized).build());
    stream.reset("I .. exceptions!! ");
    assertEquals(ImmutableList.of("I", "exceptions"), stream.toStringList());
    stream.reset("I ♥♥ exceptions!!");
    assertEquals(ImmutableList.of("I", "♥♥", "exceptions"), stream.toStringList());
}