Swing/SpinnerLocalDateTimeModel のバックアップ(No.4)

title: JSpinnerでLocalDateTimeを使用する tags: [JSpinner, SpinnerModel, LocalDateTime] author: aterai pubdate: 2015-02-02T00:12:04+09:00 description: DateやCalendarなどを使用するSpinnerDateModelの代わりに、JDK 8で導入されたLocalDateTimeなどを使用するSpinnerModelを作成して、JSpinnerで日付を選択します。

概要

DateやCalendarなどを使用するSpinnerDateModelの代わりに、JDK 8で導入されたLocalDateTimeなどを使用するSpinnerModelを作成して、JSpinnerで日付を選択します。

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サンプルコード

class SpinnerLocalDateTimeModel extends AbstractSpinnerModel implements Serializable {
  private Comparable<ChronoLocalDateTime<?>> start, end;
  private ChronoLocalDateTime<?> value;
  private TemporalUnit temporalUnit;

  public SpinnerLocalDateTimeModel(
      ChronoLocalDateTime<?> value,
      Comparable<ChronoLocalDateTime<?>> start,
      Comparable<ChronoLocalDateTime<?>> end,
      TemporalUnit temporalUnit) {
    super();
    if (Objects.isNull(value)) {
      throw new IllegalArgumentException("value is null");
    }
    if (!(Objects.isNull(start) || start.compareTo(value) <= 0)
        && (Objects.isNull(end) || end.compareTo(value) >= 0)) {
      throw new IllegalArgumentException("(start <= value <= end) is false");
    }
    this.value = value;
    this.start = start;
    this.end = end;
    this.temporalUnit = temporalUnit;
  }

  public void setStart(Comparable<ChronoLocalDateTime<?>> start) {
    if (Objects.isNull(start) ? Objects.nonNull(this.start)
                              : !Objects.equals(start, this.start)) {
      this.start = start;
      fireStateChanged();
    }
  }

  public Comparable<ChronoLocalDateTime<?>> getStart() {
    return start;
  }

  public void setEnd(Comparable<ChronoLocalDateTime<?>> end) {
    if (Objects.isNull(end) ? Objects.nonNull(this.end)
                            : !Objects.equals(end, this.end)) {
      this.end = end;
      fireStateChanged();
    }
  }

  public Comparable<ChronoLocalDateTime<?>> getEnd() {
    return end;
  }

  public void setTemporalUnit(TemporalUnit temporalUnit) {
    if (temporalUnit != this.temporalUnit) {
      this.temporalUnit = temporalUnit;
      fireStateChanged();
    }
  }

  public TemporalUnit getTemporalUnit() {
    return temporalUnit;
  }

  @Override public Object getNextValue() {
    //Calendar cal = Calendar.getInstance();
    //cal.setTime(value.getTime());
    //cal.add(calendarField, 1);
    //Date next = cal.getTime();
    ChronoLocalDateTime<?> next = value.plus(1, temporalUnit);
    return Objects.isNull(end) || end.compareTo(next) >= 0 ? next : null;
  }

  @Override public Object getPreviousValue() {
    //Calendar cal = Calendar.getInstance();
    //cal.setTime(value.getTime());
    //cal.add(calendarField, -1);
    //Date prev = cal.getTime();
    ChronoLocalDateTime<?> prev = value.minus(1, temporalUnit);
    return Objects.isNull(start) || start.compareTo(prev) <= 0 ? prev : null;
  }

  public ChronoLocalDateTime<?> getLocalDateTime() {
    return value;
  }

  @Override public Object getValue() {
    return value;
  }

  @Override public void setValue(Object value) {
    if (!(value instanceof ChronoLocalDateTime<?>)) {
      throw new IllegalArgumentException("illegal value");
    }
    if (!value.equals(this.value)) {
      this.value = (LocalDateTime) value;
      fireStateChanged();
    }
  }
}

View in GitHub: Java, Kotlin

解説

上: SpinnerDateModel

Calendarなどを使用して開始日、終了日を生成し、SpinnerDateModelを作成して、JSpinnerに設定

Calendar cal = Calendar.getInstance();
cal.clear(Calendar.MILLISECOND);
cal.clear(Calendar.SECOND);
cal.clear(Calendar.MINUTE);
cal.set(Calendar.HOUR_OF_DAY, 0);
Date date = cal.getTime();
cal.add(Calendar.DATE, -2);
Date start = cal.getTime();
cal.add(Calendar.DATE, 9);
Date end = cal.getTime();
JSpinner spinner1 = new JSpinner(new SpinnerDateModel(
    date, start, end, Calendar.DAY_OF_MONTH));

参考: JSpinnerで日付を設定

下: SpinnerLocalDateTimeModel

内部で、Dateではなく、LocalDateTimeを使用するSpinnerLocalDateTimeModel(AbstractSpinnerModelを継承)を作成

LocalDateTime d = LocalDateTime.now();
LocalDateTime s = d.minus(2, ChronoUnit.DAYS);
LocalDateTime e = d.plus(7, ChronoUnit.DAYS);
JSpinner spinner2 = new JSpinner(new SpinnerLocalDateTimeModel(
    d, s, e, ChronoUnit.DAYS));

スピナーエディタも、以下のようなLocalDateTimeを扱うものに変更

参考: Temporal Spinners « Java Tips Weblog

class LocalDateTimeEditor extends JSpinner.DefaultEditor {
  private final DateTimeFormatter dateTimeFormatter;
  private final SpinnerLocalDateTimeModel model;

  public LocalDateTimeEditor(final JSpinner spinner, String dateFormatPattern) {
    super(spinner);
    if (!(spinner.getModel() instanceof SpinnerLocalDateTimeModel)) {
      throw new IllegalArgumentException("model not a SpinnerLocalDateTimeModel");
    }
    dateTimeFormatter = DateTimeFormatter.ofPattern(dateFormatPattern);
    model = (SpinnerLocalDateTimeModel) spinner.getModel();
    final DefaultFormatter formatter = new LocalDateTimeFormatter();

    EventQueue.invokeLater(new Runnable() {
      @Override public void run() {
        formatter.setValueClass(LocalDateTime.class);
        DefaultFormatterFactory factory = new DefaultFormatterFactory(formatter);
        JFormattedTextField ftf = (JFormattedTextField) getTextField();
        try {
          String maxString = formatter.valueToString(model.getStart());
          String minString = formatter.valueToString(model.getEnd());
          ftf.setColumns(Math.max(maxString.length(), minString.length()));
        } catch (ParseException e) {
          // PENDING: hmuller
          e.printStackTrace();
        }
        ftf.setHorizontalAlignment(JTextField.LEFT);
        ftf.setEditable(true);
        ftf.setFormatterFactory(factory);
      }
    });
  }

  public SpinnerLocalDateTimeModel getModel() {
    return (SpinnerLocalDateTimeModel) getSpinner().getModel();
  }

  class LocalDateTimeFormatter extends InternationalFormatter {
    public LocalDateTimeFormatter() {
      super(dateTimeFormatter.toFormat());
    }
    @Override public String valueToString(Object value) throws ParseException {
      //System.out.println(value.getClass().getName());
      if (value instanceof TemporalAccessor) {
        //return ((LocalDateTime) value).format(dateTimeFormatter);
        return dateTimeFormatter.format((TemporalAccessor) value);
      } else {
        return "";
      }
    }
    @Override public Object stringToValue(String text) throws ParseException {
      //System.out.println("stringToValue:" + text);
      try {
        //LocalDateTime value = LocalDate.parse(text, dateTimeFormatter).atStartOfDay();
        TemporalAccessor ta = dateTimeFormatter.parse(text);
        ChronoLocalDateTime<?> value = model.getLocalDateTime();
        //@see https://tips4java.wordpress.com/2015/04/09/temporal-spinners/
        for (ChronoField field : ChronoField.values()) {
          if (field.isSupportedBy(value) && ta.isSupported(field)) {
            value = field.adjustInto(value, ta.getLong(field));
          }
        }
        Comparable<ChronoLocalDateTime<?>> min = model.getStart();
        Comparable<ChronoLocalDateTime<?>> max = model.getEnd();
        if (Objects.nonNull(min) && min.compareTo(value) > 0 
         || Objects.nonNull(max) && max.compareTo(value) < 0) {
          throw new ParseException(text + " is out of range", 0);
        }
        return value;
      } catch (DateTimeParseException e) {
        ParseException pe = new ParseException(e.getMessage(), e.getErrorIndex());
        pe.setStackTrace(e.getStackTrace());
        throw pe;
      }
    }
  }
}

Swing/SpinnerLocalDateTimeModel のバックアップ(No.4)

概要

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サンプルコード

解説

参考リンク

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