/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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 Lesser General Public License for more details.
*
* Copyright (c) 2006 - 2013 Pentaho Corporation and Contributors. All rights reserved.
*/
package org.pentaho.reporting.libraries.formula.function.text;
import java.util.Date;
import java.util.Locale;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.text.DateFormatSymbols;
import java.text.NumberFormat;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import org.pentaho.reporting.libraries.formula.EvaluationException;
import org.pentaho.reporting.libraries.formula.FormulaContext;
import org.pentaho.reporting.libraries.formula.LibFormulaErrorValue;
import org.pentaho.reporting.libraries.formula.function.Function;
import org.pentaho.reporting.libraries.formula.function.ParameterCallback;
import org.pentaho.reporting.libraries.formula.lvalues.TypeValuePair;
import org.pentaho.reporting.libraries.formula.typing.Type;
import org.pentaho.reporting.libraries.formula.typing.TypeRegistry;
import org.pentaho.reporting.libraries.formula.typing.coretypes.TextType;
/**
* This function returns the given value as text.
*
* @author Cedric Pronzato
*
*/
public class TextFunction implements Function
{
private static final long serialVersionUID = 3505313019941429911L;
public TextFunction()
{
}
public TypeValuePair evaluate(final FormulaContext context, final ParameterCallback parameters) throws EvaluationException
{
final int parameterCount = parameters.getParameterCount();
if (parameterCount < 1)
{
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_ARGUMENTS_VALUE);
}
final Type type1 = parameters.getType(0);
final Object value1 = parameters.getValue(0);
final TypeRegistry typeRegistry = context.getTypeRegistry();
if (parameterCount == 1)
{
final String result = typeRegistry.convertToText(type1, value1);
if(result == null)
{
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_INVALID_ARGUMENT_VALUE);
}
return new TypeValuePair(TextType.TYPE, result);
}
try
{
final Type type2 = parameters.getType(1);
final Object value2 = parameters.getValue(1);
final String formatString = typeRegistry.convertToText(type2, value2);
final Locale locale = context.getLocalizationContext().getLocale();
if (value1 instanceof Date)
{
final DateFormat dateFormat = new SimpleDateFormat
(formatString, new DateFormatSymbols(locale));
return new TypeValuePair(TextType.TYPE, dateFormat.format(value1));
}
if (value1 instanceof Number)
{
final NumberFormat dateFormat = new DecimalFormat
(formatString, new DecimalFormatSymbols(locale));
return new TypeValuePair(TextType.TYPE, dateFormat.format(value1));
}
try
{
final Date date = typeRegistry.convertToDate(type2, value2);
final DateFormat dateFormat = new SimpleDateFormat
(formatString, new DateFormatSymbols(locale));
return new TypeValuePair(TextType.TYPE, dateFormat.format(date));
}
catch (EvaluationException ev)
{
// ignore
}
try
{
final Number date = typeRegistry.convertToNumber(type2, value2);
final NumberFormat dateFormat = new DecimalFormat
(formatString, new DecimalFormatSymbols(locale));
return new TypeValuePair(TextType.TYPE, dateFormat.format(date));
}
catch (EvaluationException ev)
{
// ignore
}
}
catch (EvaluationException ev)
{
throw ev;
}
catch (Exception ex)
{
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_UNEXPECTED_VALUE);
}
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_INVALID_ARGUMENT_VALUE);
}
public String getCanonicalName()
{
return "TEXT";
}
}