/*!
* 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 org.pentaho.reporting.libraries.base.util.CSVQuoter;
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.Type;
import org.pentaho.reporting.libraries.formula.typing.coretypes.TextType;
public class CsvTextFunction implements Function {
public CsvTextFunction() {
}
public String getCanonicalName() {
return "CSVTEXT";
}
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 Sequence sequence =
context.getTypeRegistry().convertToSequence( 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( 3 );
final Object indexValue = parameters.getValue( 3 );
quote = context.getTypeRegistry().convertToText( indexType, indexValue );
}
if ( doQuoting == false ) {
StringBuilder b = new StringBuilder();
while ( sequence.hasNext() ) {
final Object o = sequence.next();
if ( o != null ) {
b.append( o );
}
if ( sequence.hasNext() ) {
b.append( separator );
}
}
return new TypeValuePair( TextType.TYPE, b.toString() );
} else {
final CSVQuoter quoter = new CSVQuoter( quote.charAt( 0 ), quote.charAt( 0 ), true );
StringBuilder b = new StringBuilder();
while ( sequence.hasNext() ) {
final Object o = sequence.next();
if ( o != null ) {
b.append( quoter.doQuoting( String.valueOf( o ) ) );
}
if ( sequence.hasNext() ) {
b.append( separator );
}
}
return new TypeValuePair( TextType.TYPE, b.toString() );
}
}
}