package org.pentaho.reporting.libraries.formula.function.text;
import java.text.MessageFormat;
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.FormulaContext;
import org.pentaho.reporting.libraries.formula.EvaluationException;
import org.pentaho.reporting.libraries.formula.LibFormulaErrorValue;
import org.pentaho.reporting.libraries.formula.typing.Type;
import org.pentaho.reporting.libraries.formula.typing.coretypes.TextType;
public class MessageFunction implements Function
{
public String getCanonicalName()
{
return "MESSAGE";
}
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 String message = context.getTypeRegistry().convertToText(type1, value1);
final MessageFormat format = new MessageFormat(message, context.getLocalizationContext().getLocale());
final Object[] args = new Object[parameterCount - 1];
for (int i = 1; i < parameterCount; i += 1)
{
args[i - 1] = parameters.getValue(i);
}
return new TypeValuePair(TextType.TYPE, format.format(args));
}
}