edu.stanford.nlp.ling.LabeledWord.java Source code

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Here is the source code for edu.stanford.nlp.ling.LabeledWord.java

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package edu.stanford.nlp.ling;

/**
 * A <code>LabeledWord</code> object contains a word and its tag.
 * The <code>value()</code> of a TaggedWord is the Word.  The tag
 * is, and is a Label instead of a String
 */
public class LabeledWord extends Word {

    private Label tag;

    private static final String DIVIDER = "/";

    /**
     * Create a new <code>TaggedWord</code>.
     * It will have <code>null</code> for its content fields.
     */
    public LabeledWord() {
        super();
    }

    /**
     * Create a new <code>TaggedWord</code>.
     *
     * @param word The word, which will have a <code>null</code> tag
     */
    public LabeledWord(String word) {
        super(word);
    }

    /**
     * Create a new <code>TaggedWord</code>.
     *
     * @param word The word
     * @param tag  The tag
     */
    public LabeledWord(String word, Label tag) {
        super(word);
        this.tag = tag;
    }

    public LabeledWord(Label word, Label tag) {
        super(word);
        this.tag = tag;
    }

    public Label tag() {
        return tag;
    }

    public void setTag(Label tag) {
        this.tag = tag;
    }

    @Override
    public String toString() {
        return toString(DIVIDER);
    }

    public String toString(String divider) {
        return word() + divider + tag;
    }

    // extra class guarantees correct lazy loading (Bloch p.194)
    private static class LabelFactoryHolder {

        private LabelFactoryHolder() {
        }

        private static final LabelFactory lf = new TaggedWordFactory();

    }

    /**
     * Return a factory for this kind of label
     * (i.e., <code>TaggedWord</code>).
     * The factory returned is always the same one (a singleton).
     *
     * @return The label factory
     */
    @Override
    public LabelFactory labelFactory() {
        return LabelFactoryHolder.lf;
    }

    /**
     * Return a factory for this kind of label.
     *
     * @return The label factory
     */
    public static LabelFactory factory() {
        return LabelFactoryHolder.lf;
    }

    private static final long serialVersionUID = -7252006452127051085L;

}