impl/src/main/java/org/apache/myfaces/taglib/core/ConvertNumberTag.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.myfaces.taglib.core;

import org.apache.myfaces.util.LocaleUtils;

import javax.el.ELContext;
import javax.el.ValueExpression;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.NumberConverter;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.PageContext;
import java.util.Locale;

/**
 * @author Manfred Geiler (latest modification by $Author$)
 * @version $Revision$ $Date$
 */
public class ConvertNumberTag extends ConverterTag
{
    private static final long serialVersionUID = -8365745569697171573L;
    private ValueExpression _currencyCode = null;
    private ValueExpression _currencySymbol = null;
    private ValueExpression _groupingUsed = null;
    private ValueExpression _integerOnly = null;
    private ValueExpression _locale = null;
    private ValueExpression _maxFractionDigits = null;
    private ValueExpression _maxIntegerDigits = null;
    private ValueExpression _minFractionDigits = null;
    private ValueExpression _minIntegerDigits = null;
    private ValueExpression _pattern = null;
    private ValueExpression _type = null;

    public ConvertNumberTag()
    {
        setConverterIdString(NumberConverter.CONVERTER_ID);
    }

    public void setCurrencyCode(ValueExpression currencyCode)
    {
        _currencyCode = currencyCode;
    }

    public void setCurrencySymbol(ValueExpression currencySymbol)
    {
        _currencySymbol = currencySymbol;
    }

    public void setGroupingUsed(ValueExpression groupingUsed)
    {
        _groupingUsed = groupingUsed;
    }

    public void setIntegerOnly(ValueExpression integerOnly)
    {
        _integerOnly = integerOnly;
    }

    public void setLocale(ValueExpression locale)
    {
        _locale = locale;
    }

    public void setMaxFractionDigits(ValueExpression maxFractionDigits)
    {
        _maxFractionDigits = maxFractionDigits;
    }

    public void setMaxIntegerDigits(ValueExpression maxIntegerDigits)
    {
        _maxIntegerDigits = maxIntegerDigits;
    }

    public void setMinFractionDigits(ValueExpression minFractionDigits)
    {
        _minFractionDigits = minFractionDigits;
    }

    public void setMinIntegerDigits(ValueExpression minIntegerDigits)
    {
        _minIntegerDigits = minIntegerDigits;
    }

    public void setPattern(ValueExpression pattern)
    {
        _pattern = pattern;
    }

    public void setType(ValueExpression type)
    {
        _type = type;
    }

    @Override
    public void setPageContext(PageContext context)
    {
        super.setPageContext(context);
        setConverterIdString(NumberConverter.CONVERTER_ID);
    }

    @Override
    protected Converter createConverter() throws JspException
    {
        NumberConverter converter = (NumberConverter)super.createConverter();
        ELContext elContext = FacesContext.getCurrentInstance().getELContext();
        if (null != _currencyCode)
        {
            converter.setCurrencyCode((String)UIComponentELTagUtils.evaluateValueExpression(elContext, _currencyCode));
        }
        if (null != _currencySymbol)
        {
            converter.setCurrencySymbol((String)UIComponentELTagUtils.evaluateValueExpression(elContext,
                _currencySymbol));
        }
        if (null != _groupingUsed)
        {
            converter.setGroupingUsed(UIComponentELTagUtils.getBooleanValue(elContext, _groupingUsed));
        }
        else
        {
            converter.setGroupingUsed(true);
        }
        if (null != _integerOnly)
        {
            converter.setIntegerOnly(UIComponentELTagUtils.getBooleanValue(elContext, _integerOnly));
        }
        else
        {
            converter.setIntegerOnly(false);
        }
        if (null != _locale)
        {
            Locale locale;
            if (_locale.isLiteralText())
            {
                locale = LocaleUtils.toLocale(_locale.getExpressionString());
            }
            else
            {
                Object localeValue = _locale.getValue(elContext);
                if (localeValue instanceof Locale)
                {
                    locale = (Locale)localeValue;
                }
                else
                {
                    locale = LocaleUtils.toLocale(localeValue.toString());
                }
                if (null == locale)
                {
                    locale = FacesContext.getCurrentInstance().getViewRoot().getLocale();
                }
            }
            converter.setLocale(locale);
        }
        if (null != _maxFractionDigits)
        {
            converter.setMaxFractionDigits(UIComponentELTagUtils.getIntegerValue(elContext, _maxFractionDigits));
        }
        if (null != _maxIntegerDigits)
        {
            converter.setMaxIntegerDigits(UIComponentELTagUtils.getIntegerValue(elContext, _maxIntegerDigits));
        }
        if (null != _minFractionDigits)
        {
            converter.setMinFractionDigits(UIComponentELTagUtils.getIntegerValue(elContext, _minFractionDigits));
        }
        if (null != _minIntegerDigits)
        {
            converter.setMinIntegerDigits(UIComponentELTagUtils.getIntegerValue(elContext, _minIntegerDigits));
        }
        if (null != _pattern)
        {
            converter.setPattern((String)UIComponentELTagUtils.evaluateValueExpression(elContext, _pattern));
        }
        if (null != _type)
        {
            converter.setType((String)UIComponentELTagUtils.evaluateValueExpression(elContext, _type));
        }
        else
        {
            converter.setType("number");
        }
        return converter;
    }
}