public class WordValidator2 implements Validator, StateHolder {    /** バリデータID(JSF 設定ファイルと同じ値) */    public static final String VALIDATOR_ID = "to.msn.wings.jsf.custom.    WordValidator2";    private String words = null; // 合言葉リスト    public void setWords(String words){    this.words = words;    }    public void validate(FacesContext context, UIComponent component,          Object value) throws ValidatorException {       if ( context == null ) throw new NullPointerException( "context is null" );       if ( component == null ) throw new NullPointerException( "component is null" );       if ( value == null ) {          return;       }       if ( words == null || words.length() == 0 ){          return;       }       String[] wordArray = words.split( "," );       // 検証処理       for (int i = 0; i < wordArray.length; i++) {          if ( wordArray[i].equals( value ) ){             return;          }       }       throw new ValidatorException( new FacesMessage( "合言葉が違います。" ) );    }    public void restoreState(FacesContext context, Object state) {       words = (String) state;    }    public Object saveState(FacesContext context) {       return words;    } }