Application: gvSIG desktop » Library: org.gvsig.tools

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

package org.gvsig.tools.dataTypes;

import org.gvsig.tools.dataTypes.impl.coercion.CoerceToLocale;

import org.gvsig.tools.util.LabeledValue;

public interface DataType extends LabeledValue<DataType>, org.gvsig.tools.lang.Cloneable {

  public static final int FLAG_NONE = 0;

  public static final int FLAG_NUMBER = 1; // byte, int, long, float, double, decimal

  public static final int FLAG_SUPPORT_PRECISION = 2; // byte, int, long, float, double, decimal

  public static final int FLAG_SUPPORT_SCALE = 4;     // float, double, decimal

  public static final int FLAG_PREDEFINED_PRECISION = 8;   // byte, int, long, float, double

  public static final int FLAG_SUPPORT_SIZE = 16;   // String, byte[]

  public static final int FLAG_FLOATING_POINT = 32;     // float, double

  /**

   * Without scale asigned

   */

  public static final int SCALE_NONE = -1; 

  public static final int PRECISION_NONE = -1; 

  public static final int BYTE_MAX_PRECISION = 3; // max byte 255

  public static final int BYTE_DEFAULT_PRECISION = BYTE_MAX_PRECISION;

  public static final int INT_MAX_PRECISION = 10; // max int 2147483647.

  public static final int INT_DEFAULT_PRECISION = INT_MAX_PRECISION;

  public static final int LONG_MAX_PRECISION = 19; // max long 9223372036854775807.

  public static final int LONG_DEFAULT_PRECISION = LONG_MAX_PRECISION;

  // IEEE 754 Single-precision floating-point

  // https://en.m.wikipedia.org/wiki/Single-precision_floating-point_format

  public static final int FLOAT_MAX_PRECISION = 8; // 24bits

  public static final int FLOAT_DEFAULT_PRECISION = FLOAT_MAX_PRECISION;

  public static final int FLOAT_DEFAULT_SCALE = 3;

  // IEEE 754 Double-precision floating-point

  // https://en.m.wikipedia.org/wiki/Double-precision_floating-point_format

  public static final int DOUBLE_MAX_PRECISION = 16; // 54bits

  public static final int DOUBLE_DEFAULT_PRECISION = DOUBLE_MAX_PRECISION;

  public static final int DOUBLE_DEFAULT_SCALE = 8;

  // La precision de un BigDecimal es la de un BigInteger, que esta 

  // en 2^500000000, vamos a dejarla en que es algo mas de 2^5000000, siendo

  // consciente de que algunos proveedores no podran suportarla y la recortaran.

  public static final int DECIMAL_MAX_PRECISION = 2000000;

  public static final int DECIMAL_DEFAULT_PRECISION = 20;

  public static final int DECIMAL_DEFAULT_SCALE = 3;

  public static final int LOCALE_DEFAULT_SIZE = CoerceToLocale.LOCALE_DEFAULT_SIZE;

  public interface NumberPrecisionAndScale {

    public int getPrecision();

    public int getScale();

  }

  public boolean isObject();

  public boolean isDynObject();

  public boolean isContainer();

  public boolean isNumeric();

  public String getName();

  public int getType();

  public Class getDefaultClass();

  public String getSubtype();

  public Coercion getCoercion();

//        public void setCoercion(Coercion coercion);

  public void addCoercion(Coercion coercion);

  public Object coerce(Object value) throws CoercionException;

  public Object coerce(Object value, CoercionContext context) throws CoercionException;

  public String getIconName();

  @Override

  public DataType clone() throws CloneNotSupportedException;

  public boolean supportSize();

  public boolean supportPrecision();

  public boolean supportScale();

  public int getMaxPrecision();

  public int getDefaultPrecision();

  public int getDefaultScale();

  public boolean isPredefinedPrecision();

  public boolean isFloatingPoint();

  public NumberPrecisionAndScale fixPrecisionAndScale(int precision, int scale);

  public int getFlags();

}