edu.stanford.nlp.ling.LabeledWord Maven / Gradle / Ivy
package edu.stanford.nlp.ling;
/**
* A LabeledWord object contains a word and its tag.
* The value() 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 TaggedWord.
* It will have null for its content fields.
*/
public LabeledWord() {
super();
}
/**
* Create a new TaggedWord.
*
* @param word The word, which will have a null tag
*/
public LabeledWord(String word) {
super(word);
}
/**
* Create a new TaggedWord.
*
* @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., TaggedWord).
* 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;
}