/*
* 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.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.extensions.datasources.kettle;
import java.io.Serializable;
import java.util.ArrayList;
import org.pentaho.reporting.libraries.base.util.ArgumentNullException;
import org.pentaho.reporting.libraries.formula.EvaluationException;
import org.pentaho.reporting.libraries.formula.Formula;
import org.pentaho.reporting.libraries.formula.FormulaContext;
import org.pentaho.reporting.libraries.formula.parser.ParseException;
import org.pentaho.reporting.libraries.formula.util.FormulaUtil;
public class FormulaArgument implements Serializable
{
private String formula;
public FormulaArgument(final String formula)
{
ArgumentNullException.validate("formula", formula);
this.formula = formula;
}
public String getFormula()
{
return formula;
}
public static FormulaArgument create(final String reportField) {
return new FormulaArgument('=' + FormulaUtil.quoteReference(reportField));
}
public static FormulaArgument[] convert(final String[] definedArgumentNames)
{
final FormulaArgument[] args = new FormulaArgument[definedArgumentNames.length];
for (int i = 0; i < definedArgumentNames.length; i++)
{
String definedArgumentName = definedArgumentNames[i];
args[i] = new FormulaArgument('=' + FormulaUtil.quoteReference(definedArgumentName));
}
return args;
}
public static String[] convert(final FormulaArgument[] args)
{
final ArrayList<String> textList = new ArrayList<String>();
for (int i = 0; i < args.length; i++)
{
FormulaArgument arg = args[i];
try
{
String[] references = FormulaUtil.getReferences(arg.getFormula());
if (references.length > 0)
{
textList.add(references[0]);
}
}
catch (ParseException e)
{
//
}
}
return textList.toArray(new String[textList.size()]);
}
public String[] getReferencedFields() throws ParseException
{
return FormulaUtil.getReferences(getFormula());
}
public Object compute(final FormulaContext formulaContext) throws EvaluationException, ParseException
{
Formula f = new Formula(FormulaUtil.extractFormula(formula));
f.initialize(formulaContext);
return f.evaluate();
}
public boolean equals(final Object o)
{
if (this == o)
{
return true;
}
if (o == null || getClass() != o.getClass())
{
return false;
}
final FormulaArgument that = (FormulaArgument) o;
if (!formula.equals(that.formula))
{
return false;
}
return true;
}
public int hashCode()
{
return formula.hashCode();
}
}