org.projectforge.web.wicket.converter.BigDecimalPercentConverter.java Source code

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Here is the source code for org.projectforge.web.wicket.converter.BigDecimalPercentConverter.java

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/////////////////////////////////////////////////////////////////////////////
//
// Project ProjectForge Community Edition
//         www.projectforge.org
//
// Copyright (C) 2001-2013 Kai Reinhard (k.reinhard@micromata.de)
//
// ProjectForge is dual-licensed.
//
// This community edition is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License as published
// by the Free Software Foundation; version 3 of the License.
//
// This community edition is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
// Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, see http://www.gnu.org/licenses/.
//
/////////////////////////////////////////////////////////////////////////////

package org.projectforge.web.wicket.converter;

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

import org.apache.commons.lang.StringUtils;
import org.apache.wicket.util.convert.converter.BigDecimalConverter;
import org.projectforge.common.NumberHelper;
import org.projectforge.core.NumberFormatter;

/**
 * Supports text fields with % symbol.
 * @author Kai Reinhard (k.reinhard@micromata.de)
 */
public class BigDecimalPercentConverter extends BigDecimalConverter {
    private static final long serialVersionUID = -1210802755722961881L;

    private boolean decimalFormat = true;

    public BigDecimalPercentConverter() {
    }

    /**
     * 
     * @param decimalFormat If true, then the percent value is represented by the decimal value, e. g. 19% as 0.19, otherwise 19% as 19.
     *          Default is false.
     */
    public BigDecimalPercentConverter(final boolean decimalFormat) {
        this.decimalFormat = decimalFormat;
    }

    @Override
    public BigDecimal convertToObject(String value, final Locale locale) {
        value = StringUtils.trimToEmpty(value);
        if (value.endsWith("%") == true) {
            value = value.substring(0, value.length() - 1).trim();
        }
        BigDecimal bd = super.convertToObject(value, locale);
        if (bd != null && decimalFormat == true) {
            bd = bd.divide(NumberHelper.HUNDRED, bd.scale() + 2, RoundingMode.HALF_UP);
        }
        return bd;
    }

    /**
     * @see org.apache.wicket.util.convert.converter.AbstractNumberConverter#convertToString(java.lang.Number, java.util.Locale)
     */
    @Override
    public String convertToString(final BigDecimal value, final Locale locale) {
        if (value == null) {
            return "%";
        }
        BigDecimal bd = value;
        if (decimalFormat == true) {
            bd = bd.multiply(NumberHelper.HUNDRED).stripTrailingZeros();
        }
        return NumberFormatter.format(bd) + "%";
    }
}