Example usage for edu.stanford.nlp.sentiment SentimentUtils filterUnknownRoots

Introduction

In this page you can find the example usage for edu.stanford.nlp.sentiment SentimentUtils filterUnknownRoots.

Prototype

public static List<Tree> filterUnknownRoots(List<Tree> trees) 

Source Link

Usage

From source file:opennlp.tools.parse_thicket.opinion_processor.DefaultSentimentProcessor.java

License:Apache License

/**
 * Reads an annotation from the given filename using the requested input.
 *//*w  w w.ja  v a 2 s .c o m*/
public static List<Annotation> getAnnotations(StanfordCoreNLP tokenizer, Input inputFormat, String filename,
        boolean filterUnknown) {
    switch (inputFormat) {
    case TEXT: {
        String text = IOUtils.slurpFileNoExceptions(filename);
        Annotation annotation = new Annotation(text);
        tokenizer.annotate(annotation);
        List<Annotation> annotations = Generics.newArrayList();
        for (CoreMap sentence : annotation.get(CoreAnnotations.SentencesAnnotation.class)) {
            Annotation nextAnnotation = new Annotation(sentence.get(CoreAnnotations.TextAnnotation.class));
            nextAnnotation.set(CoreAnnotations.SentencesAnnotation.class, Collections.singletonList(sentence));
            annotations.add(nextAnnotation);
        }
        return annotations;
    }
    case TREES: {
        List<Tree> trees;
        if (filterUnknown) {
            trees = SentimentUtils.readTreesWithGoldLabels(filename);
            trees = SentimentUtils.filterUnknownRoots(trees);
        } else {
            trees = Generics.newArrayList();
            MemoryTreebank treebank = new MemoryTreebank("utf-8");
            treebank.loadPath(filename, null);
            for (Tree tree : treebank) {
                trees.add(tree);
            }
        }

        List<Annotation> annotations = Generics.newArrayList();
        for (Tree tree : trees) {
            CoreMap sentence = new Annotation(listToString(tree.yield()));
            sentence.set(TreeCoreAnnotations.TreeAnnotation.class, tree);
            List<CoreMap> sentences = Collections.singletonList(sentence);
            Annotation annotation = new Annotation("");
            annotation.set(CoreAnnotations.SentencesAnnotation.class, sentences);
            annotations.add(annotation);
        }
        return annotations;
    }
    default:
        throw new IllegalArgumentException("Unknown format " + inputFormat);
    }
}

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