ConvertNumberTag.java

/*
 * Copyright 2004 The Apache Software Foundation.
 *
 * Licensed 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 java.util.Locale;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.NumberConverter;
import javax.faces.el.ValueBinding;
import javax.faces.webapp.ConverterTag;
import javax.faces.webapp.UIComponentTag;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.PageContext;

import org.apache.myfaces.shared_impl.util.LocaleUtils;


/**
 * @author Manfred Geiler (latest modification by $Author$)
 * @version $Revision$ $Date$
 */
public class ConvertNumberTag
        extends ConverterTag
{
    private static final long serialVersionUID = -8365745569697171573L;
    private String _currencyCode = null;
    private String _currencySymbol = null;
    private String _groupingUsed = "true"; // default value as required by the spec
    private String _integerOnly = "false"; // default value as required by the spec
    private String _locale = null;
    private String _maxFractionDigits = null;
    private String _maxIntegerDigits = null;
    private String _minFractionDigits = null;
    private String _minIntegerDigits = null;
    private String _pattern = null;
    private String _type = "number"; // default value as required by the spec

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

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

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

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

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

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

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

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

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

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

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

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

    public void setPageContext(PageContext context)
    {
        super.setPageContext(context);
        setConverterId(NumberConverter.CONVERTER_ID);
    }

    protected Converter createConverter() throws JspException
    {
        NumberConverter converter = (NumberConverter)super.createConverter();

        FacesContext facesContext = FacesContext.getCurrentInstance();
        setConverterCurrencyCode(facesContext, converter, _currencyCode);
        setConverterCurrencySymbol(facesContext, converter, _currencySymbol);
        setConverterGroupingUsed(facesContext, converter, _groupingUsed);
        setConverterIntegerOnly(facesContext, converter, _integerOnly);
        setConverterLocale(facesContext, converter, _locale);
        setConverterMaxFractionDigits(facesContext, converter, _maxFractionDigits);
        setConverterMaxIntegerDigits(facesContext, converter, _maxIntegerDigits);
        setConverterMinFractionDigits(facesContext, converter, _minFractionDigits);
        setConverterMinIntegerDigits(facesContext, converter, _minIntegerDigits);
        setConverterPattern(facesContext, converter, _pattern);
        setConverterType(facesContext, converter, _type);

        return converter;
    }

    protected static void setConverterLocale(FacesContext facesContext,
                                             NumberConverter converter,
                                             String value)
    {
        if (value == null) return;
        if (UIComponentTag.isValueReference(value))
        {
            ValueBinding vb = facesContext.getApplication().createValueBinding(value);
            converter.setLocale((Locale)vb.getValue(facesContext));
        }
        else
        {
            Locale locale = LocaleUtils.converterTagLocaleFromString(value);
            converter.setLocale(locale);
        }
    }



    private static void setConverterCurrencyCode(FacesContext facesContext,
                                                 NumberConverter converter,
                                                 String value)
    {
        if (value == null) return;
        if (UIComponentTag.isValueReference(value))
        {
            ValueBinding vb = facesContext.getApplication().createValueBinding(value);
            converter.setCurrencyCode((String)vb.getValue(facesContext));
        }
        else
        {
            converter.setCurrencyCode(value);
        }
    }

    private static void setConverterCurrencySymbol(FacesContext facesContext,
                                                   NumberConverter converter,
                                                   String value)
    {
        if (value == null) return;
        if (UIComponentTag.isValueReference(value))
        {
            ValueBinding vb = facesContext.getApplication().createValueBinding(value);
            converter.setCurrencySymbol((String)vb.getValue(facesContext));
        }
        else
        {
            converter.setCurrencySymbol(value);
        }
    }

    private static void setConverterGroupingUsed(FacesContext facesContext,
                                                 NumberConverter converter,
                                                 String value)
    {
        if (value == null) return;
        if (UIComponentTag.isValueReference(value))
        {
            ValueBinding vb = facesContext.getApplication().createValueBinding(value);
            Boolean b = (Boolean)vb.getValue(facesContext);
            if (b != null)
            {
                converter.setGroupingUsed(b.booleanValue());
            }
        }
        else
        {
            converter.setGroupingUsed(Boolean.valueOf(value).booleanValue());
        }
    }

    private static void setConverterIntegerOnly(FacesContext facesContext,
                                                NumberConverter converter,
                                                String value)
    {
        if (value == null) return;
        if (UIComponentTag.isValueReference(value))
        {
            ValueBinding vb = facesContext.getApplication().createValueBinding(value);
            Boolean b = (Boolean)vb.getValue(facesContext);
            if (b != null)
            {
                converter.setIntegerOnly(b.booleanValue());
            }
        }
        else
        {
            converter.setIntegerOnly(Boolean.valueOf(value).booleanValue());
        }
    }

    private static void setConverterMaxFractionDigits(FacesContext facesContext,
                                                      NumberConverter converter,
                                                      String value)
    {
        if (value == null) return;
        if (UIComponentTag.isValueReference(value))
        {
            ValueBinding vb = facesContext.getApplication().createValueBinding(value);
            Integer i = (Integer)vb.getValue(facesContext);
            if (i != null)
            {
                converter.setMaxFractionDigits(i.intValue());
            }
        }
        else
        {
            converter.setMaxFractionDigits(Integer.parseInt(value));
        }
    }

    private static void setConverterMaxIntegerDigits(FacesContext facesContext,
                                                     NumberConverter converter,
                                                     String value)
    {
        if (value == null) return;
        if (UIComponentTag.isValueReference(value))
        {
            ValueBinding vb = facesContext.getApplication().createValueBinding(value);
            Integer i = (Integer)vb.getValue(facesContext);
            if (i != null)
            {
                converter.setMaxIntegerDigits(i.intValue());
            }
        }
        else
        {
            converter.setMaxIntegerDigits(Integer.parseInt(value));
        }
    }

    private static void setConverterMinFractionDigits(FacesContext facesContext,
                                                      NumberConverter converter,
                                                      String value)
    {
        if (value == null) return;
        if (UIComponentTag.isValueReference(value))
        {
            ValueBinding vb = facesContext.getApplication().createValueBinding(value);
            Integer i = (Integer)vb.getValue(facesContext);
            if (i != null)
            {
                converter.setMinFractionDigits(i.intValue());
            }
        }
        else
        {
            converter.setMinFractionDigits(Integer.parseInt(value));
        }
    }

    private static void setConverterMinIntegerDigits(FacesContext facesContext,
                                                     NumberConverter converter,
                                                     String value)
    {
        if (value == null) return;
        if (UIComponentTag.isValueReference(value))
        {
            ValueBinding vb = facesContext.getApplication().createValueBinding(value);
            Integer i = (Integer)vb.getValue(facesContext);
            if (i != null)
            {
                converter.setMinIntegerDigits(i.intValue());
            }
        }
        else
        {
            converter.setMinIntegerDigits(Integer.parseInt(value));
        }
    }

    private static void setConverterPattern(FacesContext facesContext,
                                            NumberConverter converter,
                                            String value)
    {
        if (value == null) return;
        if (UIComponentTag.isValueReference(value))
        {
            ValueBinding vb = facesContext.getApplication().createValueBinding(value);
            converter.setPattern((String)vb.getValue(facesContext));
        }
        else
        {
            converter.setPattern(value);
        }
    }

    private static void setConverterType(FacesContext facesContext,
                                         NumberConverter converter,
                                         String value)
    {
        if (value == null) return;
        if (UIComponentTag.isValueReference(value))
        {
            ValueBinding vb = facesContext.getApplication().createValueBinding(value);
            converter.setType((String)vb.getValue(facesContext));
        }
        else
        {
            converter.setType(value);
        }
    }


}