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

import org.apache.commons.lang3.BooleanUtils;

    @Override

    public Object coerce(Object value) throws CoercionException {

        if (value == null || value instanceof Double) {

            return value;

        }

        return coerce(value, DataTypeUtils.coerceContextDefaultDecimal());

    @Override

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

        if (value == null || value instanceof Double) {

            return value;

        CoercionContextLocale theContext;

        if (context instanceof CoercionContextLocale) {

            theContext = (CoercionContextLocale) context;

            theContext = DataTypeUtils.coerceContextDefaultLocale();

        Double num;

        try {

            if (value instanceof Number) {

                num = ((Number) value).doubleValue();

            } else if (value instanceof Boolean) {

                num = ((boolean) value ? 1d : 0d);

            } else if (value instanceof Date) {

                num = (double) (((Date) value).getTime());

            } else {

                String s = value.toString();

                if (s == null) {

                    return null;

                }

                s = s.trim().toLowerCase();

                if (s.length() == 0) {

                    return null;

                }

                if (s.startsWith("0x")) {

                    num = (double) Long.parseLong(s.substring(2), 16);

                } else {

                    Boolean bool = BooleanUtils.toBooleanObject(s);

                    if (bool != null) {

                        num = ((boolean) bool ? 1d : 0d);

                    } else {

                        if (s.startsWith("+")) {

                            s = s.substring(1);

                        }

                        ParsePosition p = new ParsePosition(0);

                        DecimalFormat nf = (DecimalFormat) NumberFormat.getInstance(theContext.locale());

                        Number n = nf.parse(s, p);

                        if (p.getErrorIndex() > 0 || p.getIndex() < s.length()) {

                            throw new CoercionException("Can't coerce '" + s + "' to double with locale " + theContext.locale().getLanguage() + "(error index " + p.getErrorIndex() + ", index " + p.getIndex() + ").");

                        }

                        num = n.doubleValue();

                    }

                }

            }

            return num;

        } catch (CoercionException e) {

            throw e;

        } catch (Exception e) {

            throw new CoercionException("Can't coerce '" + value.toString() + "' to double with locale " + theContext.locale().getLanguage() + "'.", e);

        }

    public static void main(String[] args) throws CoercionException {

        Coercion toDouble = new CoerceToDouble();

        Double x = (double) toDouble.coerce("10.5");

        System.out.println(x);

        x = (double) toDouble.coerce("123456789.5");

        System.out.println(x);

        x = (double) toDouble.coerce("123,456,789.5");

        System.out.println(x);

    }