NonNumericFilteredBigDecimalConverter.java

/*******************************************************************************
 * Copyright (c) 2015 Development Gateway, Inc and others.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the MIT License (MIT)
 * which accompanies this distribution, and is available at
 * https://opensource.org/licenses/MIT
 *
 * Contributors:
 * Development Gateway - initial API and implementation
 *******************************************************************************/
/**
 * 
 */
package org.devgateway.toolkit.forms.wicket.converters;

import java.math.BigDecimal;
import java.util.Locale;

import org.apache.wicket.util.convert.converter.BigDecimalConverter;

/**
 * @author mpostelnicu
 * 
 *         This is a {@link BigDecimalConverter} adapted to remove all
 *         non-decimal characters before it complains (throws exception) that
 *         the number is not a number. This will lead to all {@link BigDecimal}
 *         fields in the application to refresh showing only the number portion
 *         of the text being typed. Example: you type 'afefw@#123456' and when
 *         the textfield loses focus it will refresh to show '123,456' (the
 *         comma is the decimal separator applied by
 *         {@link BigDecimalConverter#convertToString(BigDecimal, Locale)} but
 *         that is done only after the {@link BigDecimal} was read by
 *         convertInput()
 */
public class NonNumericFilteredBigDecimalConverter extends BigDecimalConverter {

    private static final long serialVersionUID = 1L;

    @Override
    public BigDecimal convertToObject(final String value, final Locale locale) {
        String newValue = value;
        if (newValue != null) {
            newValue = newValue.replaceAll("[^\\d\\.]", "");
        }
        return super.convertToObject(newValue, locale);
    }
}