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

package org.gvsig.tools.dataTypes;

import java.util.Date;

import java.util.Locale;

import org.gvsig.tools.ToolsLocator;

/**

 *

 * @author jjdelcerro

 */

public class DataTypeUtils {

    private static CoercionContextLocale COERCE_CONTEXT_DEFAULT_LOCALE ;

    private static CoercionContextDecimal COERCE_CONTEXT_DEFAULT_DECIMAL ;

    protected DataTypeUtils() {

    }

    public static CoercionContextLocale coerceContextLocale(Locale locale) {

      return new CoercionContextLocaleImpl(locale);

    }

    public static CoercionContextLocale coerceContextDefaultLocale() {

      if( COERCE_CONTEXT_DEFAULT_LOCALE==null || 

          Locale.getDefault()!=COERCE_CONTEXT_DEFAULT_LOCALE.locale() ) {

        COERCE_CONTEXT_DEFAULT_LOCALE = new CoercionContextLocaleImpl(Locale.getDefault());

      }

      return COERCE_CONTEXT_DEFAULT_LOCALE;

    }

    public static CoercionContextDecimal coerceContextDefaultDecimal() {

      if( COERCE_CONTEXT_DEFAULT_DECIMAL==null || 

          Locale.getDefault()!=COERCE_CONTEXT_DEFAULT_DECIMAL.locale() ) {

        COERCE_CONTEXT_DEFAULT_DECIMAL = new CoercionContextDecimalImpl(

                Locale.getDefault()

        );

      }

      return COERCE_CONTEXT_DEFAULT_DECIMAL;

    }

    public static CoercionContextDecimal coerceContextDecimal(Locale locale) {

      if( COERCE_CONTEXT_DEFAULT_DECIMAL!=null || 

          locale==COERCE_CONTEXT_DEFAULT_DECIMAL.locale() ) {

          return COERCE_CONTEXT_DEFAULT_DECIMAL;

      }

      return new CoercionContextDecimalImpl(locale);

    }

    public static CoercionContextDecimal coerceContextDecimal(Locale locale, int precision, int scale, int roundMode) {

      return new CoercionContextDecimalImpl(locale,precision, scale, roundMode);

    }

    public static Object coerce(int type, Object value, Object defaultValue) {

        DataTypesManager manager = ToolsLocator.getDataTypesManager();

        DataType dataType = manager.get(type);

        try {

            Object x = dataType.coerce(value);

            if( x == null ) {

                return defaultValue;

            }

            return x;

        } catch (CoercionException ex) {

            return defaultValue;

        }

    }

    public static Object coerce(int type, Object value) throws CoercionException {

        DataTypesManager manager = ToolsLocator.getDataTypesManager();

        DataType dataType = manager.get(type);

        Object x = dataType.coerce(value);

        return x;

    }

    public static int toInteger(Object value, Integer defaultValue) {

        return (int) coerce(DataTypes.INT, value, defaultValue);

    }

    public static long toLong(Object value, Long defaultValue) {

        return (long) coerce(DataTypes.LONG, value, defaultValue);

    }

    public static float toFloat(Object value, Float defaultValue) {

        return (float) coerce(DataTypes.FLOAT, value, defaultValue);

    }

    public static double toDouble(Object value, Double defaultValue) {

        return (double) coerce(DataTypes.DOUBLE, value, defaultValue);

    }

    public static String toString(Object value, String defaultValue) {

        return (String) coerce(DataTypes.STRING, value, defaultValue);

    }

    public static boolean toBoolean(Object value, Boolean defaultValue) {

        return (boolean) coerce(DataTypes.BOOLEAN, value, defaultValue);

    }

    public static Date toDate(Object value, Date defaultValue) {

        return (Date) coerce(DataTypes.DATE, value, defaultValue);

    }

    public static Date toTime(Object value, Date defaultValue) {

        return (Date) coerce(DataTypes.TIME, value, defaultValue);

    }

    public static Date toTimestamp(Object value, Date defaultValue) {

        return (Date) coerce(DataTypes.TIMESTAMP, value, defaultValue);

    }

}