/*!
* 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 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.Sequence;
import org.pentaho.reporting.libraries.formula.typing.coretypes.AnyType;
import org.pentaho.reporting.libraries.formula.typing.sequence.RecursiveSequence;
public class NormalizeArrayFunction implements Function
{
public NormalizeArrayFunction()
{
}
public String getCanonicalName()
{
return "NORMALIZEARRAY";
}
public TypeValuePair evaluate(final FormulaContext context,
final ParameterCallback parameters) throws EvaluationException
{
final int parameterCount = parameters.getParameterCount();
if (parameterCount == 0 || parameterCount > 2)
{
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_ARGUMENTS_VALUE);
}
final Sequence sequenceRaw =
context.getTypeRegistry().convertToSequence(parameters.getType(0), parameters.getValue(0));
if (sequenceRaw == null)
{
throw EvaluationException.getInstance(LibFormulaErrorValue.ERROR_NA_VALUE);
}
final RecursiveSequence sequence = new RecursiveSequence(sequenceRaw, context);
final boolean removeNull;
if (parameterCount == 2)
{
final Boolean removeNullValuesRaw =
context.getTypeRegistry().convertToLogical(parameters.getType(1), parameters.getValue(1));
removeNull = removeNullValuesRaw == null || Boolean.TRUE.equals(removeNullValuesRaw);
}
else
{
removeNull = true;
}
final ArrayList retval = new ArrayList();
while (sequence.hasNext())
{
final Object o = sequence.next();
if (removeNull && o == null)
{
continue;
}
retval.add(o);
}
return new TypeValuePair(AnyType.ANY_ARRAY, retval.toArray());
}
}