/* 
 * Copyright (c) 2008 Stiftung Deutsches Elektronen-Synchrotron, 
 * Member of the Helmholtz Association, (DESY), HAMBURG, GERMANY.
 *
 * THIS SOFTWARE IS PROVIDED UNDER THIS LICENSE ON AN "../AS IS" BASIS. 
 * WITHOUT WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED 
 * TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE AND 
 * NON-INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE 
 * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR 
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. SHOULD THE SOFTWARE PROVE DEFECTIVE 
 * IN ANY RESPECT, THE USER ASSUMES THE COST OF ANY NECESSARY SERVICING, REPAIR OR 
 * CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE. 
 * NO USE OF ANY SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER THIS DISCLAIMER.
 * DESY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, 
 * OR MODIFICATIONS.
 * THE FULL LICENSE SPECIFYING FOR THE SOFTWARE THE REDISTRIBUTION, MODIFICATION, 
 * USAGE AND OTHER RIGHTS AND OBLIGATIONS IS INCLUDED WITH THE DISTRIBUTION OF THIS 
 * PROJECT IN THE FILE LICENSE.HTML. IF THE LICENSE IS NOT INCLUDED YOU MAY FIND A COPY 
 * AT HTTP://WWW.DESY.DE/LEGAL/LICENSE.HTM
 */
 /**
 * 
 */
package org.csstudio.platform.internal.simpledal.converters;


/**
 * Converter for double values.
 * 
 * @author Sven Wende
 * 
 */
class DoubleConverter implements IValueTypeConverter<Double> {
	/**
	 * {@inheritDoc}
	 */
	@Override
	public Double convert(Object value) throws NumberFormatException {
		Double result = 0.0;
//	    System.out.println("Converter"+value);
		if (value != null) {
			if (value instanceof Double) {
				result = (Double) value;
			} else if (value instanceof Number) {
				Number n = (Number) value;
				result = n.doubleValue();
			} else {
				try {
					result = Double.valueOf(value.toString());
				} catch (NumberFormatException e) {
	                if(value.toString().matches("[-+]?0[xX].*")) {
	                    // if Hex
	                    result = new Double(Long.parseLong(value.toString().replaceFirst("(\\+)?0[xX]", ""),16));
	                }else {
				        // if Exp
	                    result = new Double(Long.parseLong(value.toString()));
	                }
				}
			}
		}

		assert result != null;
		return result;
	}
}