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

import java.text.NumberFormat;

import java.text.ParsePosition;

import java.util.Locale;

import org.gvsig.tools.dataTypes.DataTypesManager.CoercionWithLocale;

public class CoerceToFloat implements CoercionWithLocale {

	}

	public Object coerce(Object value, Locale locale) throws CoercionException {

    	if( value == null ) {

    		return null;

    	}

		try {

			if (!(value instanceof Double)) {

				if (value instanceof Number) {

					value = new Double(((Number) value).doubleValue());

				} else {

					String s = value.toString().trim().toLowerCase();

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

						value = new Double(Long.parseLong(s.substring(2), 16));

					} else {

						ParsePosition p = new ParsePosition(0);

						NumberFormat nf = NumberFormat.getInstance(locale);

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

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

							throw new CoercionException("can't coerce to float with locale "+locale.getLanguage());

						}

						value = new Float(num.floatValue());

					}

				}

			}

			return value;

		} catch (CoercionException e) {

			throw e;

		} catch (Exception e) {

			throw new CoercionException(e);

		}