DateColumnType.java

package tech.tablesaw.columns.dates;

import java.time.LocalDate;
import tech.tablesaw.api.ColumnType;
import tech.tablesaw.api.DateColumn;
import tech.tablesaw.columns.AbstractColumnParser;
import tech.tablesaw.columns.AbstractColumnType;
import tech.tablesaw.io.ReadOptions;

public class DateColumnType extends AbstractColumnType {

  public static final int BYTE_SIZE = 4;
  public static final DateParser DEFAULT_PARSER = new DateParser(ColumnType.LOCAL_DATE);

  private static DateColumnType INSTANCE;

  private DateColumnType(int byteSize, String name, String printerFriendlyName) {
    super(byteSize, name, printerFriendlyName);
  }

  public static DateColumnType instance() {
    if (INSTANCE == null) {
      INSTANCE = new DateColumnType(BYTE_SIZE, "LOCAL_DATE", "Date");
    }
    return INSTANCE;
  }

  @Override
  public DateColumn create(String name) {
    return DateColumn.create(name);
  }

  @Override
  public AbstractColumnParser<LocalDate> customParser(ReadOptions options) {
    return new DateParser(this, options);
  }

  public static int missingValueIndicator() {
    return Integer.MIN_VALUE;
  }

  public static boolean valueIsMissing(int i) {
    return i == missingValueIndicator();
  }
}