/*!
* 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) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.libraries.formula.function.userdefined;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.StringTokenizer;
import org.pentaho.reporting.libraries.base.util.CSVTokenizer;
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.coretypes.AnyType;
public class CsvArrayFunction implements Function
{
public CsvArrayFunction()
{
}
public String getCanonicalName()
{
return "CSVARRAY";
}
public TypeValuePair evaluate(final FormulaContext context,
final ParameterCallback parameters) throws EvaluationException
{
final int parameterCount = parameters.getParameterCount();
if (parameterCount < 1 || parameterCount > 4)
{
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_ARGUMENTS_VALUE);
}
final String sequence =
context.getTypeRegistry().convertToText(parameters.getType(0), parameters.getValue(0));
if (sequence == null)
{
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_NA_VALUE);
}
String quote = "\"";
String separator = ",";
boolean doQuoting = false;
if (parameterCount > 1)
{
final Type indexType = parameters.getType(1);
final Object indexValue = parameters.getValue(1);
final Boolean indexNumber = context.getTypeRegistry().convertToLogical(indexType, indexValue);
doQuoting = Boolean.TRUE.equals(indexNumber);
}
if (parameterCount > 2)
{
final Type indexType = parameters.getType(2);
final Object indexValue = parameters.getValue(2);
separator = context.getTypeRegistry().convertToText(indexType, indexValue);
}
if (parameterCount > 3)
{
final Type indexType = parameters.getType(1);
final Object indexValue = parameters.getValue(1);
quote = context.getTypeRegistry().convertToText(indexType, indexValue);
}
final ArrayList resultList;
final Enumeration strtok;
if (doQuoting == false)
{
final StringTokenizer strtokenizer = new StringTokenizer(sequence, separator);
resultList = new ArrayList(strtokenizer.countTokens());
strtok = strtokenizer;
}
else
{
final CSVTokenizer strtokenizer = new CSVTokenizer(sequence, separator, quote, false);
resultList = new ArrayList(strtokenizer.countTokens());
strtok = strtokenizer;
}
while (strtok.hasMoreElements())
{
final Object o = strtok.nextElement();
if (o != null)
{
resultList.add(o);
}
}
return new TypeValuePair(AnyType.TYPE, resultList.toArray(new String[resultList.size()]));
}
}